Answers
Answer: 10. 39.7 g \(CH_3OH\)
11. 650 g of \(HgO\)
Explanation:
To calculate the moles, we use the equation:
\(\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}\)
a) moles of \(H_2\)
\(\text{Number of moles}=\frac{5.0g}{2.0g/mol}=2.5moles\)
\(CO(g)+2H_2(g)\rightarrow CH_3OH(l)\)
According to stoichiometry :
2 moles of \(H_2\) produce = 1 mole of \(CH_3OH\)
Thus 2.5 moles of \(H_2\) produce=\(\frac{1}{2}\times 2.5=1.25moles\) of \(CH_3OH\)
Mass of \(CH_3OH=moles\times {\text {Molar mass}}=1.25moles\times 32g/mol=39.7g\)
Thus 39.7 g of \(CH_3OH\) will be produced from 5.0 g of hydrogen.
11. \(2HgO(s)\rightarrow 2Hg(l)+O_2(g)\)
According to stoichiometry :
1 mole of \(O_2\) is produced by = 2 moles of \(HgO\)
Thus 1.50 moles of \(O_2\) are produced by =\(\frac{2}{1}\times 1.50=3moles\) of \(HgO\)
Mass of \(HgO=moles\times {\text {Molar mass}}=3moles\times 216g/mol=650g\)
Thus 650 g of \(HgO\) woukd be decomposed to produce 1.5 mol of oxygen
Related Questions
Iron reacts with chlorine to form iron(III) chloride.
2Fe + 3Cl2 → 2FeCl3
What mass (in grams) of chlorine gas is needed to react with 251 grams of iron?
Select one:
a.
71 grams
b.
392 grams
c.
479 grams
d.
622 grams
Answers
The mass (in grams) of chlorine gas is needed to react with 251 grams of iron is 479 grams. Option C.
To determine the mass of chlorine gas needed to react with 251 grams of iron, we need to use the stoichiometry of the balanced chemical equation:
2Fe + 3Cl2 → 2FeCl3
From the balanced equation, we can see that 2 moles of iron (Fe) react with 3 moles of chlorine gas (Cl2) to produce 2 moles of iron(III) chloride (FeCl3).
To calculate the mass of chlorine gas, we can follow these steps:
Step 1: Convert the given mass of iron (Fe) to moles.
Using the molar mass of iron (Fe), which is approximately 55.85 g/mol, we can calculate the number of moles of iron:
moles of Fe = mass of Fe / molar mass of Fe
moles of Fe = 251 g / 55.85 g/mol
moles of Fe ≈ 4.5 mol (rounded to one decimal place)
Step 2: Use the mole ratio from the balanced equation to find the moles of chlorine gas (Cl2) needed.
From the balanced equation, we know that 2 moles of Fe react with 3 moles of Cl2. Therefore, the moles of Cl2 can be calculated as:
moles of Cl2 = (moles of Fe / 2) * 3
moles of Cl2 = (4.5 mol / 2) * 3
moles of Cl2 ≈ 6.75 mol (rounded to two decimal places)
Step 3: Convert the moles of chlorine gas to grams.
Using the molar mass of chlorine gas (Cl2), which is approximately 70.90 g/mol, we can calculate the mass of chlorine gas:
mass of Cl2 = moles of Cl2 * molar mass of Cl2
mass of Cl2 = 6.75 mol * 70.90 g/mol
mass of Cl2 ≈ 479 grams (rounded to the nearest whole number) Option C is correct.
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Of the animals in the bottom row, which one is most likely to be a keystone species?
nuthatch
deer
frog
butterfly
Answers
Answer:
Deer
Explanatio
The deer is most likely to be a keystone species.
What is a Keystone species?This is defined as the organism which has a strong impact and defines the ecosystem.
The deer is a keystone species as many organisms depend on it as a source of food in the ecosystem.
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50 POINTS !! I have a science project that I need help with its called pH
Project: Researching Acid Rain if anyone knows the answer or has down it before let me know.
Answers
Answer:
Acidic solutions are measured to have lower pH values than basic or alkaline solutions.
Explanation:
So basically acids have a lower pH than other liquids like water.
Which diagram shows the relationship between volume and pressure for a gas at constant temperature?
Answers
Pressure and volume have an indirectly proportional relationship
Explanation:Ideal gas laws can help us describe the relationship between different values for gases.
Boyle's Law
The ideal gas law that connects pressure and volume given a constant temperature is Boyle's law. Boyle's law is represented as:
P₁V₁ = P₂V₂This equation shows that pressure and volume have an indirectly proportional relationship. This means that as pressure increases, volume decreases and vice versa. So, pressure and increase opposite of each other.
Indirect Relationships
Indirect relationships occur when one value and the reciprocal of another are proportional. For example, pressure and 1/volume are directly proportional. This function looks like a decreasing exponential function. Attached is an example of a volume vs. pressure graph.
With enough ____________,
_______________, and
__________, the original
sedimentary or igneous rock is
changed to ______________ rock.
Answers
Answer: with enough heat, pressure, and time, the original sedimentary or igneous rock is changed to metamorphic rock.
Explanation:
22.55 mL of an H2SO4 solution
were titrated with 14.85 mL of a
0.146 M NaOH solution to reach the
equivalence point. What is the
molarity of the H2SO4 solution?
Answers
The concentration of H₂SO₄ solution is equal to 0.0480 M.
What is a neutralization reaction?A neutralization reaction is described as a chemical reaction where acid and base react to produce respective salt and water. When a strong acid reacts with a strong base then the salt can be neutral.
When H₂SO₄ (a strong acid) reacts with NaOH, the resulting salt is Na₂SO₃ and water.
H₂SO₄ + 2 NaOH → Na₂SO₄ + 2H₂O
Given, the concentration of NaOH = 0.146 M
The volume of the NaOH = 14.85 ml = 0.01485 L
The number of moles of NaOH, n = M × V = 0.146 × 0.01485 = 0.00216 M
The volume of the H₂SO₄ = 22.55 ml = 0.02255 L
The number of moles of H₂SO₄, n = 0.00216/2 = 0.00108 mol
The concentration of H₂SO₄ =0.00108/0.02255 = 0.0480 M
Therefore, the molarity of H₂SO₄ is 0.0480 M.
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A hypothetical molecule, X–Y, has a dipole moment of 1.39 D and a bond length of 121 pm.
Calculate the percent ionic character of this molecule.
Answers
The percent ionic character of a molecule can be calculated using the following equation:
Percent Ionic Character = 100 × (μ/r)^2
Where μ is the dipole moment in Debye and r is the bond length in picometers.
Plugging in the given values, we get:
Percent Ionic Character = 100 × (1.39/121)^2
Percent Ionic Character = 100 × (0.0115)^2
Percent Ionic Character = 1.32%
What is dipole moment?
The dipole moment is a measure of the separation of positive and negative charges in a molecule. It is represented by the vector sum of the individual bond dipole moments and is measured in debyes (D).
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17. Which of the following statement best explains what pollination is?
A. It is the union of sperm and egg cell.
B. It is the process where the pollen of one flower reaches the stigma of another flower.
C. It is the process wherein plants are developed from seeds.
D. It is the process by which seeds are sent by their parent plant into a faraway place to
become a new plant.
Answers
Answer:
ıt is the projesi where the polen of one flower reaches the sığmaz of another flower.
Answer:
B
Explanation:
Have a nice day☺gsjsjamsvwksk
If the external pressure on water is 422 mmHg, will water boil approximately at
100°C, 80°C, or 60°C (refer to figure 5.1 in our lab manual)?
om
100
Answers
The boiling point of water is required at a pressure of 422 mmHg.
The boiling point of water will be \(80^{\circ}\text{C}\).
\(T_0\) = Boiling point of water at sea level = \(100^{\circ}\text{C}=373.15\ \text{K}\)
\(P_0\) = Pressure at sea level = 760 mmHg
R = Gas constant = 8.314 J/mol K
\(\Delta H_v\) = Heat of vaporization of water = 40660 J/mol
Boiling point is given by the Clausius-Clapeyron equation
\(T_B=\left(\dfrac{1}{T_0}-\dfrac{R\ln\dfrac{P}{P_0}}{\Delta H_v}\right)^{-1}\\\Rightarrow T_B=\left(\dfrac{1}{373.15}-\dfrac{8.314\ln\dfrac{422}{760}}{40660}\right)^{-1}\\\Rightarrow T_B=357.12-273.15=83.97^{\circ}\text{C}\)
The boiling point of water will be approximately \(80^{\circ}\text{C}\).
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Air, Sea water, alloy afe the examples of
a) Compound
b) Mixture
c) Element
d) Molecule
Answers
Answer:
B. Mixture
because air,sea water and alloy are example of Mixture
You work in a museum that has a huge, beautiful stamed-glass window: Each gamell dints the light a different coice. Recenty up a table m front of the wmdiow: Plant 1 is im fiont of a biue stained glass, Plant 2 is in font of a purgie you tall the museum directur to move so it doesnit became maicurshed?You work in a museum that has a huge, beautiful, stained-glass window. Each panel tints the light a different color. Recently a new exhibit showcasing plants from around the world has set up a table in front of the window. Plant 1 is in front of a blue stained glass, Plant 2 is in front of a purple stained glass, and Plant 3 is in front of a green stained glass. Which plant should you tell the museum director to move so it doesn't become malnourished?
A. Plant 2
B. Plant 1
C. Plant 3
D. All three plants
Answers
The plant that should be moved here to protect from malnourishment is plant 3. The correct option is C.
What is visible spectrum?The visible light spectrum is the portion of the electromagnetic spectrum that can be seen by the human eye. Simply put, this range of wavelengths is known as visible light.
The visible spectrum, also known as the optical spectrum, is the portion of the electromagnetic spectrum whose radiation consists of photons capable of sensitizing a normal person's human eye. The corresponding visible light radiation range is identified.
That being said, plant 3 is situated in front of a green stained glass window.
Plants have chlorophyll pigment that reflects back green light, making green light less effective for photosynthesis and causing them to die as quickly as if they were kept in the dark.
Thus, the correct option is C.
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Question #1
In a genetics investigation, students used two red straws to represent malo parent DNA. Thoy used two
green straws to represent female parent DNA. The offspring in this activity are best represented by
A
either one red straw or one green straw.
B.
two green straws.
С
two red straws.
one red straw and one green straw.
D
Answers
Answer:
D. one red straw and one green straw.
For any large collection of randomly selected chlorine atoms:
a. what is the average atomic mass of chlorine in amu?
Answers
An atomic mass unit is defined as 1/12 th of the mass of carbon-12 atom.
The mass of an atom is mainly due to its protons and neutrons in the nucleus.
Weight of a proton is 1.6 x 10^-27 kg
Weight of a neutron is 1.6 x 10^-27kg
However weight of an electron is 9 x 10^-31kg and hence is negligible in calculation of amu
A chlorine atom has 17 protons in its nucleus and 18 neutrons in its nucleus
Its atomic number is 17
Amu weight of Cl= weight of protons+ weight of neutrons
=17+18
=35amu
Hence the average atomic mass unit of chlorine atoms will be 35 amu
Disclaimer:
The value is taken for easier calculation and is not accurate upto 3 decimals
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Eggs are only produced when a person is trying to get pregnant. true or false?
Answers
Answer: False
Explanation: Eggs are produced during ovulation once a month when someone has a period.
Give three members of cycloalkanes (n = 3, 4, 5) and alkenes (n = 3, 4, 5)
Answers
Cycloalkanes (n=3, 4, 5):
Cyclopropane (C3H6)
Cyclobutane (C4H8)
Cyclopentane (C5H10)
Alkenes (n=3, 4, 5):
Propene (C3H6)
Butene (C4H8)
Pentene (C5H10)
What is a cycloalkane?Cycloalkanes are a type of organic compounds that contain a closed ring of carbon atoms. The carbon atoms in the ring are bonded to each other with single covalent bonds. Cycloalkanes are saturated hydrocarbons because they have the maximum number of hydrogen atoms that can be bonded to each carbon atom. The simplest cycloalkane is cyclopropane, which has three carbon atoms in the ring. Other examples include cyclobutane, cyclopentane, cyclohexane, and so on.
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Plz help ASAP
Plz and ty
Answers
Answer:
It's circulatory system
Hope it's help ^_^
Answer: circilutory
Explanation:
Calculate the mass percent by volume of 34.1 g of glucose
(C.H120., MM = 180.2 g/mol) in
325 mL of solution.
Answers
Answer:
10.5%
Explanation:
The equation used to calculate mass percent by volume is:
Mass Solute (g)
Mass/Volume % = ----------------------------------- x 100%
Volume Solution (mL)
In this case, the solute is the glucose. You can plug the given values into the equation and solve.
34.1 g C₆H₁₂O₆
Mass/Volume % = ------------------------------- x 100%
325 mL soln
Mass/Volume % = 0.105 x 100%
Mass/Volume % = 10.5%
When the pH test is done with a yellow litmus paper, it turns blue. This color change indicates that the solution is___
Acidic
Basic
Water
Neutral
Answers
Answer:
A basic solution such as hydroxyls
find the number of atoms in 36 grams of HCI
Answers
Answer:
Explanation:
36 grams HClX (1mole HCl /36.46097 g HCl) X (6.02 X 10^23 particles/ 1mole)
=5.943890138 X 10^23 Molecules
As there are total of two atoms in HCl molecule( one hydrogen and one chlorine,
No. of atoms in one mole of HCl = 2x5.943890138x10²³=1.188778028 x10²³ atoms. If you need it to the correct sig figs answer is 1.8 X x10²³ atoms.
here is where the numbers came from
the 1moleHCl/36.46097 g HCl is the Molar mass (get it from the periodic table
the 6.02 X 10^23 parcticle (atoms or molecules) / 1 Mole is avogadro's number
Select all of the following that are combustion reactions.
Answers
Answer:
Explanation:
1,2,4,
The equations that show combustion are equations A, B and D.
What is combustion?When we talk about combustion, the idea is that the substance would be burnt in oxygen. In other words, the combustion can be taken to be an oxidation reaction. It is an oxidation reaction in the sense that the oxidation number of the substance that is reacting with the oxygen would become increased.
When we look at the equations that we have, it is quite easy to pick out among the balanced reaction equations that are shown here the ones that has to do with the burning of the substance in oxygen and a consequent rise in the oxidation number.
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uestion 8 Calculate the percentage by mass of hydrogen in PtCl2(NH3)2 A. 1.558 B. 1.008 c.0.672 D. 0.034 E.2.016
Answers
The percentage by mass of hydrogen can be calculated from the problem as 2.016
How do you calculate the mass percent of an atom in a compound?To calculate the mass percent of an atom in a compound, you first need to determine the molar mass of the compound and the molar mass of the atom of interest.
Determine the molar mass of the compound by adding up the atomic masses of all the atoms in the compound.
Determine the number of moles of the atom of interest in one mole of the compound. This is done by dividing the atomic mass of the atom by the molar mass of the compound.
We know that the relative molecular mas of the compound is; 300 g/mol
Then;
Percent by mass of hydrogen is; 6/300 * 100/1
= 2.016%
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The composition of a compound is 28.73% K, 1.48% H, 22.76% P, and 47.03% O. The molar mass of the
compound is 136.1 g/mol.
I
Answers
The compound has an empirical formula of \(K_2H_2P_2O_8\) and a molecular formula of \(K_2HPO_4\).
The given compound has a percent composition of K = 28.73%, H = 1.48%, P = 22.76%, and O = 47.03%. Its molar mass is 136.1 g/mol. To determine its molecular formula, we need to find its empirical formula and calculate its molecular formula from its empirical formula.The empirical formula is the smallest whole number ratio of atoms in a compound. It can be determined by converting the percent composition of the elements into their respective moles and dividing each by the smallest number of moles calculated. The moles of K, H, P, and O in 100 g of the compound are: K = 28.73 g x (1 mol/39.1 g) = 0.734 molH = 1.48 g x (1 mol/1.01 g) = 1.46 molP = 22.76 g x (1 mol/30.97 g) = 0.736 molO = 47.03 g x (1 mol/16.00 g) = 2.94 molDividing each by the smallest number of moles gives the following ratios: K = 0.734/0.734 = 1H = 1.46/0.734 = 2P = 0.736/0.734 = 1.002O = 2.94/0.734 = 4. The empirical formula of the compound is \(K_2H_2P_2O_8\). To calculate the molecular formula, we need to determine the factor by which the empirical formula should be multiplied to obtain the molecular formula. This can be done by comparing the molar mass of the empirical formula to the molar mass of the compound.The molar mass of \(K_2H_2P_2O_8\) is: \(M(K_2H_2P_2O_8)\) = (2 x 39.1 g/mol) + (2 x 1.01 g/mol) + (2 x 30.97 g/mol) + (8 x 16.00 g/mol) = 276.2 g/mol. The factor by which the empirical formula should be multiplied is: M(molecular formula)/M(empirical formula) = 136.1 g/mol/276.2 g/mol = 0.4935. The molecular formula is obtained by multiplying the empirical formula by this factor: \(K_2H_2P_2O_8 * 0.4935 = K_2HPO_4\). Therefore, the molecular formula of the compound is \(K_2HPO_4\).The molecular formula of the given compound having a composition of 28.73% K, 1.48% H, 22.76% P, and 47.03% O with a molar mass of 136.1 g/mol is \(K_2HPO_4\). The empirical formula of the compound is \(K_2H_2P_2O_8\). The compound's molecular formula is calculated by determining the factor by which the empirical formula should be multiplied to obtain the molecular formula. The factor is M(molecular formula)/M(empirical formula) = 136.1 g/mol/276.2 g/mol = 0.4935. The molecular formula of the compound is obtained by multiplying the empirical formula by this factor, resulting in the molecular formula \(K_2HPO_4\).For more questions on empirical formula
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The correct question would be as
The composition of a compound is 28.73% K. 1.48% H, 22.76% P, and 47.03% O. The molar mass of the compound is 136.1 g/mol. What is the Molecular Formula of the compound?
\(KH_2PO_4\\KH_3PO_4\\K_2H_4P_20_{12}\\K_2H_3PO_6\)
How many shared pairs of electrons are shown?
Answers
A 100.0g sample of Fe2S3 was to produce Fe2O3 and SO2 according to 2Fe2S3+9O2=2 Fe2O3+6SO2. if 57.8g of Fe2O3 was collected what is the percent yeild
Answers
The percent yield of \(Fe_2O_3\) if 57.8g was collected is 75.1%.
To calculate the percent yield, we need to compare the actual yield (the amount of\(Fe_2O_3\) collected) to the theoretical yield (the amount of \(Fe_2O_3\)that would be obtained if the reaction went to completion).
First, we need to determine the molar mass of \(Fe_2O_3\) and \(Fe_2S_3\):
Molar mass of \(Fe_2O_3\):
2(55.85 g/mol) + 3(16.00 g/mol) = 159.69 g/mol
Molar mass of\(Fe_2S_3\):
2(55.85 g/mol) + 3(32.07 g/mol) = 207.67 g/mol
Next, we can calculate the theoretical yield of\(Fe_2O_3\) using stoichiometry:
2 moles of \(Fe_2S_3\) produce 2 moles of \(Fe_2O_3\)(according to the balanced equation).
So, the molar ratio of \(Fe_2O_3\)to Fe2S3 is 2:2.
The molar mass ratio of \(Fe_2O_3\) to Fe2S3 is:
159.69 g/mol : 207.67 g/mol
To calculate the theoretical yield, we can use the following equation:
Theoretical yield of\(Fe_2O_3\) = (mass of \(Fe_2S_3\)) * (molar mass of \(Fe_2O_3\) / molar mass of \(Fe_2S_3\))
Theoretical yield of \(Fe_2O_3\) = (100.0 g) * (159.69 g/mol / 207.67 g/mol)
Theoretical yield of \(Fe_2O_3\) = 76.46 g
Now we can calculate the percent yield using the formula:
Percent yield = (actual yield / theoretical yield) * 100
Percent yield = (57.8 g / 76.46 g) * 100
Percent yield = 75.1%
Therefore, the percent yield of \(Fe_2O_3\) is 75.1%.
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(a) Why does one side of the brain is affected when other side is damaged?
Answers
Answer:
Because the brain is connected.
Explanation:
Shivani measures out 6.0 moles of epsom salt (MgSO) to put her bath. How many grams MgSO4 went in the bath?
Answers
Answer: 720 g
Explanation:
To solve this we must be knowing each and every concept related to mole. Therefore, shivani measures out 6.0 moles of epsom salt (MgSO\(_4\)) to put her bath. 1,566g MgSO\(_4\) went in the bath.
What is mole?A mole is merely a measuring unit. In reality, it is one of its International System of Units' seven foundation units. When current units are insufficient, new units are created.
Chemical reactions frequently occur at levels where employing grams would be inappropriate, but using absolute quantities of atoms/molecules/ions would also be misleading.
For all practical reasons, one mole of a substance in grams is nearly equal to 1 molecule for the compound per daltons.
Mathematically,
number of mole =given mass ÷ molar mass
number of mole=6.0 moles
molar mass of epsom= 261.47g/mol
substituting all the given values in the above equation, we get
6.0 moles =mass of epsom ÷ 261.47g/mol
mass of epsom =1,566g
Therefore, 1,566g MgSO\(_4\) went in the bath.
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In which atmospheric layer is the ozone layer? O stratosphere o thermosphere O mesosphere troposphere
Answers
Answer:
The stratosphere
Explanation:
Chemical bonding in metals is
a. the same as ionic bonding
b. the same as covalent bonding.
C. a combination of ionic and covalent bonding
different from ionic or covalent bonding
Answers
Answer:
different from ionic or covalent bonding
Explanation:
19) A sample of metal ore is reacted according to the following reaction:Fe(s) +2HCL (aq) --> FeCl2(aq) + H2(g)If 24.06 mL of 5.6 M HCL are used, what mass of Fe was in the ore? Keep the answer with 2 decimal places
Answers
Assuming all the HCl presend in the 24.06mL reacted, we can follow the steps:
1 - Use the concentration and the volume to calculate the number of moles of HCl that reacted
2 - Apply the stoichiometry ratios to calculate the number os moles of Fe that reacted
3 - Use the tomic weight of Fe to calculate the mass of that amount of number of moles of Fe.
1 - The concentration is given by the equation:
\(C=\frac{n_{\text{solute}}}{V_{\text{solution}}}\)The number of moles of solute is the same as the number of moles o HCl, because it is the solute in this case:
\(\begin{gathered} C=\frac{n_{HCl}}{V_{\text{solution}}_{}} \\ n_{HCl}=C\cdot V_{\text{solution}} \end{gathered}\)So, we have:
\(\begin{gathered} C=5.6mol/L \\ V_{\text{solution}}=24.06mL=24.06\times10^{-3}L \\ n_{HCl}=5.6mol/L\cdot24.06\times10^{-3}L=0.134736mol \end{gathered}\)2 - The coefficients of Fe and HCl are 1 and 2, respectively, so we have the following relation between their number of moles:
Fe --- HCl
1 --- 2
\(\begin{gathered} \frac{n_{Fe}}{1}=\frac{n_{HCl}}{2} \\ n_{Fe}=\frac{n_{HCl}}{2}=\frac{0.134736mol}{2}=0.067368mol \end{gathered}\)3 - The atomic weight of Fe can be checked on a periodic table:
\(M_{Fe}=55.845g/mol\)So, we have:
\(\begin{gathered} M_{Fe}=\frac{m_{Fe}}{n_{Fe}} \\ m_{Fe}=n_{Fe}M_{Fe}=0.067368mol\cdot55.845g/mol=3.76216\ldots g\approx3.76g \end{gathered}\)So, there was approximately 3.76 g of Fe.
PLSSSSS I NEED HELP MY AMPLIFY SIM WON’T WORK I DONT KNOW WHAT TO DO FOR AMPLIFY TAB 3.5.!! IM IN THE PURPLE GROUP !! The lead chemist wants you to determine what is happening to the freedom of movement of an object’s molecules when you smell something. Is it possible to smell a chocolate bar when it is a solid? Launch the Sim and investigate.
Use the Sim to determine if the molecules of a substance can be in two different phases at the same time.
Go through each substance and see if you can get it to exist in two phases at once.
Record as much evidence as you can in the table below.
Answers
When a chocolate bar is solid, it is able to smell it. It is also important to note that a substance 's molecules cannot be in two distinct phases at the a time.
Why is this the case ?In general, it is not possible for a the molecules of the chocolate to be in two distinct phases at the same time.
It must be noted that smelling a solid, such as a chocolate bar, however, mean the release of loose molecules from the solid, which may then move through the air and reach our olfactory receptors in our nose, allowing us to sense the fragrance.
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