Answer:
36.1% Ca
Explanation:
To find the percent calcium, you need to (1) construct the chemical formula of calcium chloride, then (2) calculate the molar mass of calcium chloride, and then (3) calculate the percent calcium in calcium chloride.
(Step 1)
Calcium = Ca²⁺
Chlorine = Cl⁻
Calcium Chloride = CaCl₂
(Step 2)
Atomic Mass (Ca): 40.078 g/mol
Atomic Mass (Cl): 35.453 g/mol
Molar Mass (CaCl₂): 40.078 g/mol + 2(35.453 g/mol)
Molar Mass (CaCl₂): 110.984 g/mol
(Step 3)
CaCl₂ = 1 atom Ca and 2 atoms Cl
1 atom Ca = 40.078 g/mol
40.078 g Ca
-------------------------- x 100% = 36.1% Ca
110.984 g CaCl₂
The world's record for the largest cup of coffee was broken on
October 15. 2010. with a 2010-gal cup of coffee in Las Vegas, Ive
vada. If a cup of coffee contains 473 mL of coffee, how many
cups of coffee would be reauired to till this coffee cup
The number of cups of coffee in a 2010-gal cup of coffee is 16086 cups of coffee
What is the number of cups of coffee in a 2010-gal cup of coffee?The number of cups of coffee in a 2010-gal cup of coffee is calculated as follows:
Number of cups of coffee = volume of 2010-gal in ml/473 ml
Volume of large cup of coffee = 2010-gal
Number of mL in 1 gal = 3785.41 mL
2010 gal in mL = 2010 * 3785.41
2010 gal in mL = 7608674.1 mL
Number of cups of coffee = 7608674.1 mL/473 mL
Number of cups of coffee = 16086 cups of coffee
In conclusion, the number of cups pf coffee in 2010 gal is obtained using the conversion factor between gal and mL
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what is the percent by mass of nitrogen in the following fertilizers? NH3
The percent by mass of nitrogen in ammonia (NH3) is approximately 82.15%
Calculating the mass of nitrogen to the total mass of the compound and then expressing the result as a percentage will allow us to determine the percent by mass of nitrogen in NH3 (ammonia).
Ammonia's molecular structure, NH3, indicates that it is made up of one nitrogen atom (N) and three hydrogen atoms (H). We must take both the molar masses of nitrogen and ammonia into account when calculating the percent by mass of nitrogen.
Nitrogen's (N) molar mass is roughly 14.01 g/mol. The molar masses of nitrogen and hydrogen are added to determine the molar mass of ammonia (NH3). Since hydrogen's molar mass is around 1.01 g/mol, ammonia's molar mass is:
(3 mol H 1.01 g/mol) + (1 mol N 14.01 g/mol) = 17.03 g/mol = NH3.
Now, we can use the following formula to get the nitrogen content of ammonia in percent by mass:
(Mass of nitrogen / Mass of ammonia) / 100% is the percentage of nitrogen by mass.
Ammonia weighs 17.03 g/mol and contains 14.01 g/mol of nitrogen by mass. By entering these values, we obtain:
(14.01 g/mol / 17.03 g/mol) 100% 82.15 % of nitrogen by mass
Ammonia (NH3) has a nitrogen content that is roughly 82.15 percent by mass.
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What type of bonding is shown in the diagram above?
A.
covalent bonding because one atom gains an electron and the other atom loses an electron
B.
ionic bonding because the atoms are sharing electrons
C.
covalent bonding because the atoms are sharing electrons
D.
ionic bonding because one atom gains an electron and the other atom loses an electron
Answer:
\(\color {blue}\boxed{\colorbox{white} {✦Answer✦}}\)
D.
ionic bonding because one atom gains an electron and the other atom loses an electron
\(\color {blue}\boxed{\colorbox{white} {✦hope helps uh<3✦}}
\)
The attractive interactions between atoms and molecules lead to bonding. NaCl shows ionic bonding because an atom gains and other loses an electron. Thus, option D is correct.
What is ionic bonding?The chemical bonds that include the electrostatic attraction and forces to form the linkage between the opposite charges are said to have ionic bonds.
The ionic bonds are characterized by the presence of differences in the electronegativities that allow the opposite charges to interact efficiently. The bonds are formed between negative and positive charges.
The NaCl molecule has ionic bonds as sodium has more electron that tends to donate electrons while the chlorine atoms have one less valence electron that tends to gain an electron.
Therefore, in option D, the NaCl molecule shows ionic bonding as they have cations and anions.
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Scientists classify rocks mainly according to which feature?
their color
how they form
their hardness
where they are found
If 450 grams of dextrose are dissolved in 650ml Of water with a resultant volume of 1 liter what is the percent concentration (w/v) of dextrose
Considering the definition of mass volume percentage, the percent concentration of dextrose is 45%.
Mass volume percentageMass volume percentage (% m/V) is a measure of concentration that indicates the number of grams of solute per 100 volume units of the solution. In other words, the volume percent of a component in the solution is defined as the ratio of the mass of the component to the volume of the solution, expressed as a percentage.
The mass volume percentage of a solution is determined by the following expression:
\(Mass volume percentage=\frac{mass of solute}{volume of solution}x100\)
Percent concentration in this caseIn this case, you know:
mass of solute= 450 gramsvolume of solution= 1 L= 1000 mLReplacing in the definition of mass volume percentage:
\(Mass volume percentage=\frac{450 grams}{1000 mL}x100\)
Solving:
mass volume percentage= 45%
Finally, the percent concentration of dextrose is 45%.
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Which element has the largest nuclear charge?
Cs
Li
Mg
S
Answer:
Mg
Explanation:
I think Mg is correct not too sure tho
Which of the following characteristics are true for both plants and animals reproduction
A. Alternation of generation
B. They carry hereditary material from parent
C. Characterized by sexual reproduction
D. The offspring looks identical to its parents
Answer:
c?
Explanation:
10. When dissolved in water, most Group 1 metal salts can be described as
strong electrolytes.
strong acids.
weak electrolytes.
A
B
C
D
non-electrolytes.
(1)
When dissolved in water, most Group 1 metal salts can be described as strong electrolytes.
When Group 1 metal salts are dissolved in water, they can be described as strong electrolytes. This is because Group 1 metals, such as lithium (Li), sodium (Na), potassium (K), and so on, readily lose their outermost valence electron to form positive ions (cations). These cations then dissociate completely in water, separating from the anions to which they were originally bonded.
The dissociation of Group 1 metal salts in water results in the formation of positively charged metal ions and negatively charged non-metal ions (anions). These ions are free to move and conduct electric current, making the solution a good conductor of electricity. The complete dissociation of Group 1 metal salts in water and the presence of freely moving ions make them strong electrolytes.
Strong electrolytes are substances that ionize completely or almost completely in solution, producing a high concentration of ions. This is in contrast to weak electrolytes, which only partially ionize and produce a lower concentration of ions.
In summary, when Group 1 metal salts are dissolved in water, they form strong electrolytes due to their ability to dissociate completely into ions, leading to a high concentration of freely moving ions in the solution, thus enabling efficient electrical conductivity.
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) A cup of hot soup is _______ than a cup of cold soup
Answer: better
Explanation:
Write in Scientific Notation 1,060,000,000
Which of the following is the correct formula to calculate percent by mass? [Mass of solution (g) + mass of solute (g)] × 100 [Mass of solute (g) − mass of solution (g)] × 100 [Mass of solute (g) ÷ mass of solution (g)] × 100 [Mass of solution (g) ÷ mass of solute (g)] × 100
Considering the definition of percent by mass, the correct answer is the third option: the correct formula to calculate percent by mass is [Mass of solute (g) ÷ mass of solution (g)] × 100
Definition of percent by massThe percent by mass is a measure of the amount of mass that an element occupies in a compound and it is defined as the ratio of the mass of the solute to the mass of the solution, expressed as a percentage.
To calculate the percentage of composition, it is necessary to know the mass of the element in a known mass of the compound.
So, the percent by mass is calculated as the mass of the solute divided by the mass of the solution, the result of which is multiplied by 100 to give a percentage:
percent by mass= [Mass of solute (g) ÷ mass of solution (g)] × 100
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1. When solute dissolves in water
Explanation:
The water molecules behave like tiny magnet attracted to metal ....As each solute molecule gradully breaks away,water molecules surround it, and it drifts it to solution. Is the solute is a solid,the prosses happens gradually
How many milliliters of 0.2560 M KCl solution will contain 20.00 g of KCl?
Answer is 1048 mL solution but how do I get to the answer?
Answer:
1048 mL
Explanation:
Step 1: Given data
Concentration of the solution: 0.2560 MMass of KCl (solute): 20.00 gStep 2: Calculate the moles corresponding to 20.00 g of KCl
The molar mass of KCl is 74.55 g/mol.
20.00 g × 1 mol/74.55 g = 0.2683 mol
Step 3: Calculate the volume of the solution
Molarity is equal to moles of solute divided by liters of solution.
M = moles of solute / volume of solution
volume of solution = moles of solute / M
volume of solution = 0.2683 mol / (0.2560 mol/L)
volume of solution = 1.048 L = 1048 mL
The conjugation of the trans/cis product is likely diminished due to steric interactions between the cis-phenyl and the nearby vinyl hydrogen. This interaction likely causes the phenyl ring to twist out of the plane, and thus no longer to be fully conjugated with the adjacent double bond. The trans-trans isomer has no such steric interactions, and thus it is expected to be more fully conjugated. The two isomers are thus may have different light absorbing properties.
Considering all this, which product stereoisomer do you expect to have the highest lambda max value in the UV-V is spectrum- the trans/trans or the cis/trans? Briefly explain your answer.
Answer:
The trans/trans stereoisomer.
Explanation:
So, we are going to have two stereoisomers or arrangements for this chemical compound, that is the Cis/trans, the trans/trans.
For a compound to be seen with UV, the main or primary condition is conjugation or how conjugated the chemical specie or compound is.
Thus, the more the conjugation, the more or the higher the wavelength or lands value.
=> The Trans/trans stereoisomer will have the highest lamda value or wavelength because the energy gap in its π - π* Transitioning deceases due to the STERIC interactions, and the more the decrease in the energy gap, the more or the higher the lamda value or wavelength.
When a substance undergoes a chemical reaction in a closed system, which of the following will NOT change? (select all that apply)
a. temperature
b. energy
c. density
d. mass
In a closed system, which is one where no matter can enter or leave, the total mass remains constant so mass will NOT change during a chemical reaction in a closed system and the correct option is option B and D.
In a closed system, the total mass remains constant according to the Law of Conservation of Mass, which states that mass cannot be created or destroyed in a chemical reaction. Therefore, during a chemical reaction in a closed system, the mass of the substances involved will not change.
There is no release or absorption of energy whereas the rearrangement of atoms and molecules can result in changes in density. It is important to note that while mass remains constant, the composition and arrangement of the substances can undergo significant transformations.
Thus, the ideal selection is option B and D.
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Your friend says to you, “The energy your brain uses to think comes from the sun.” How do you trace energy from the sun to the energy used for your brain cells to work? Write your answer below in complete sentences. PLEASE HELP ME QUICK IM GUNNA FAIL!!!!!!!!!!
The energy from the sun can be traced to the energy used by the brain from the food we consume.
Source of brain's energyThe brain gets its energy from the food we consume while most of the food we consume come from plants or animals that consume plants.
Plants get their own food directly from sunlight through the process of photosynthesis. They are able to convert solar energy from the sun to chemical energy.
When humans consume food, the energy in the food is unlocked and converted to usable energy by the body. This is part of the energy that the brain makes use of.
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I need help with #5 please. thank you
Answer:
Atom 3
Explanation:
Because it has electronic configuration of 10 which it is an atomic number of neon. And neon is a gas which is stable, hence does not react
is rocky road ice cream a mixture or a substance
Answer:
i think its a mixture because it has different things mixed with it like chocolate, marshmallows and other stuff
Explanation:
The "Ring of Responsibility" requires a next to water bodies. O 50-foot 43 3-foot O 5-foot O 15- to 25-foot untreated buffer zone
The "Ring of Responsibility" requires a 15- to 25-foot untreated buffer zone next to water bodies.
What is buffer zone?A buffer zone is an area of land that separates two or more countries, states, or territories, and is often demilitarized. The purpose of a buffer zone is to provide a space for negotiations and to reduce the possibility of conflict and war. Buffer zones can also be used to protect sensitive natural resources or habitats, such as areas of wilderness or wildlife. Buffer zones can be permanent or temporary, and can range in size from a few miles to hundreds of miles. In addition to physical barriers, buffer zones can also include economic, political, and social measures to reduce tensions between two or more parties. Buffer zones are an important tool in international relations, as they can help to prevent armed conflict and promote peaceful resolution of disputes.
This buffer zone is intended to prevent pollutants from entering the water body and protect it from potential environmental damage.
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I need to answer this one quick
Answer:
Electrochemical
Combustion
Photosynthesis
Respiration
Explanation:
A gas has a volume of 50.0 mL at a temperature of 10.0 K and a pressure of 760. kPa. What will be the new volume when the temperature is changed to 20.0 K and the pressure is changed to 380. kPa?
To solve this problem using the gas laws, we need to use the Ideal Gas Law. This law states that the product of the pressure and the volume of a gas is proportional to the absolute temperature.
The equation of the Ideal Gas Law is the following:
\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{\dfrac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2} } \end{gathered}$} }\)
Where:
P₁ = initial pressure = 760 kPaV₁ = initial volume = 50.0 mL = 0.050 LT₁ = initial temperature = 10.0 KP₂ = Final pressure = 380 kPaT₂ = final temperature = 20.0 KV₂ = Final volume = ?We clear for V₂:
\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2=\frac{P_1V_1T_2}{P_2T_1 } } \end{gathered}$} }\)
Where:
P₁ = initial pressure V₁ = initial volumeT₁ = initial temperatureP₂ = Final pressureT₂ = final temperatureV₂ = Final volumeSubstituting the known values:
\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2=\frac{760\not{kPa}\times0.050 \ L\times20.0\not{k} }{ 380\not{kPa}\times10.0\not{k} } } \end{gathered}$} }\)
\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2=\frac{760 \ L}{3800 } } \end{gathered}$} }\)
\(\boxed{\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2\approx0.2 \ Liters} \end{gathered}$} }}\)
When the temperature changes to 20.0 K and the pressure changes to 380 kPa, the new volume will be approximately 0.2 L (200.0 mL).What is the scientific notation of 0.000296
Answer: 2.96 × 10-4 this is the scientific noatation of 0.000296
Explanation:
Why is it important to keep detailed records and notes about evidence and the crime scene
Answer:
It is important to record the crime scene in order to view how it was originally found so when items are removed, it can still be investigated and viewed.
Explanation:
Why to you do that this app doesn’t tell me anything
The density of a test gas is to be determined experimentally at 293.2 K using an apparatus constructed of a 4.550 L glass bulb volume that is attached to a vacuum pumpThe mass of the evacuated bulb is 22.436 After it is filled with the test gas to a pressure of 0.0750 atm, the mass increases to 22.837 Assume the gas behaves ideally. What is the density (g/L)?How many moles of gas are in the bulb(mol)? What is the apparent molar mass of the gas(g/mol)?
The apparent molar mass of the gas is 16.3132 g
Density is the substance's mass consistent with the unit of quantity. The symbol most customarily used for density is ρ, despite the fact that the Latin letter D can also be used. Density is the size of ways tightly a cloth is packed together. it's far defined as the mass consistent with unit quantity.
ρ = m/V, wherein ρ is the density, m is the mass of the item and V is the quantity of the object.
Calculation:-
T = 293.2 K
volume = 4.550 L
mass = 22.436 g
pressure = 0.0750 atm
new mass = 22.837
PV = nRT
PV = mass/molar RT
molar mass =mass RT/PV
= 22.837 × 8.314 × 293.2 /0.075 × 4.55 L
= 163132 g
The density is of two types, one is absolute density, and the alternative is relative density. Relative density is also called unique gravity, which is the ratio of the density of a material to the density of a reference material. typically, the reference fabric is water.
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Milk of magnesia, which is an aqueous suspension of magnesium hydroxide, is used as an antacid in the reaction below. How many molecules of HCl would have to be present to form 34.52 g of MgCl₂?
Mg(OH)₂(s) + 2 HCl(aq) → 2 H₂O(l) + MgCl₂(aq)
Approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.
To determine the number of molecules of HCl required to form 34.52 g of MgCl₂, we need to use the molar mass and stoichiometry of the balanced equation:
Mg(OH)₂(s) + 2 HCl(aq) → 2 H₂O(l) + MgCl₂(aq)
The molar mass of MgCl₂ is 95.21 g/mol.
First, we need to calculate the number of moles of MgCl₂ formed:
Moles of MgCl₂ = mass of MgCl₂ / molar mass of MgCl₂
Moles of MgCl₂ = 34.52 g / 95.21 g/mol
Moles of MgCl₂ = 0.363 mol
According to the balanced equation, the stoichiometric ratio between HCl and MgCl₂ is 2:1. Therefore, the moles of HCl required can be calculated as follows:
Moles of HCl = 2 * Moles of MgCl₂
Moles of HCl = 2 * 0.363 mol
Moles of HCl = 0.726 mol
To calculate the number of molecules, we need to use Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol.
Number of molecules of HCl = Moles of HCl * Avogadro's number
Number of molecules of HCl = 0.726 mol * 6.022 x 10^23 molecules/mol
Number of molecules of HCl = 4.37 x 10^23 molecules
Therefore, approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.
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A vial of Ancef 1 g is reconstituted with 5 mL of normal saline to yield 125mg / m * L How many mL of the medication should be given if a patient is prescribed 250 mg of the medication?
Ancef (Cefazolin) is a first-generation cephalosporin antibiotic that is used to treat bacterial infections. Cefazolin is available in several formulations, including injectable, intravenous, and powder for injection.
A vial of Ancef 1 g is reconstituted with 5 mL of normal saline to yield 125mg / m * L. We need to determine how many milliliters of the medication should be given if a patient is prescribed 250 mg of the medication.To begin with, let us first calculate the concentration of the reconstituted solution using the given data.1 gram of Ancef (Cefazolin) = 1000 milligrams (mg)5 mL of normal saline = 5000 milligrams (mg)Therefore, the total volume of the reconstituted solution = 5 mL + the volume of Ancef (Cefazolin)1 g of Ancef (Cefazolin) = 125 mg/mL (Given)Therefore, the volume of Ancef (Cefazolin) = (250 mg)/(125 mg/mL) = 2 mLTherefore, the total volume of the reconstituted solution = 5 mL + 2 mL = 7 mLThus, the amount of medication that should be given to the patient is 2 mL.For such more question on antibiotic
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A reactive metal that burns with oxygen and makes a white bright light is?
sodium
iron
magnesium
copper
Answer:
it is magnesium hope it helps
The heat of vaporization for ethanol is 0.826 kJ/g
. Calculate the heat energy in joules required to boil 75.25 g
of ethanol.
Answer:
87469.73J
Explanation:
72.25g/0.826kJ/g=87.4697337kJ
what mass of glucose c6h12o6 would be required to prepare 5000 mL of a 0.215 M solution
Approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M.
To determine the mass of glucose (C6H12O6) required to prepare a 0.215 M solution in 5000 mL, we need to use the formula:
Molarity (M) = moles of solute / volume of solution (in liters)
First, let's convert the volume of the solution from milliliters (mL) to liters (L):
5000 mL = 5000/1000 = 5 L
Now, we can rearrange the formula to solve for moles of solute:
moles of solute = Molarity (M) x volume of solution (L)
moles of solute = 0.215 M x 5 Lmoles of solute = 1.075 mol
Since glucose (C6H12O6) has a molar mass of approximately 180.16 g/mol, we can calculate the mass of glucose using the equation:
mass of solute = moles of solute x molar mass of solute
mass of glucose = 1.075 mol x 180.16 g/mol
mass of glucose = 194.0 g (rounded to three significant figures)
Therefore, approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M. It's important to note that the molar mass of glucose used in this calculation may vary slightly depending on the level of precision required.
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