Answers
Answer:
The answer is
1040gExplanation:
Density = mass / volume
mass = density × volume
volume = 2cm³
density = 520g/cm³
mass = 2 × 520
= 1040g
Hope this helps you
Related Questions
In the EXPLORE section of your lesson 4.08 on Potential energy there were several animations to watch that provided a graphic illustrating how the PE and KE in a system changed as a skateboarder rides a halfpipe or a pendulum moves, why did the bar for the total energy remain constant?
A
This is because no energy is being created or destroyed in this system
B Because these models do not take into account the impact of friction and air resistance and are helping to solidify the concept of energy conservation and that the total mechanical energy remains constant in that model.
C Energy is converted from kinetic to potential and potential to kinetic, but the total amount of energy is conserved.
D
all answers given are correct
Answers
Answer:
This is because no energy is being created or destroyed in this system
Explanation:
I think this is correct? I hope it helps.
) A magnet that’s domains remain aligned when removed from a magnetic field.
Answers
Answer:
Above the Curie temperature, a magnet permanently loses all or some of its magnetism. External magnetic fields: Strong, opposing magnetic fields can cause the magnetic domains to lose their orientation and relax into a lower state of energy where they are not aligned.
Explanation:
You can determine from the table earlier in this lesson that the energy stored in a gallon of gasoline is actually 65 times greater than the energy stored in a stick of dynamite. However, the energy in a stick of dynamite is released all in one instant, while the energy from a gallon of gasoline is usually released in a more controlled manner. Why is the rate at which energy is output from a system important?
Answers
Answer:
Explanation:
Safety: The rate of energy release determines how quickly and explosively the energy is released. In the case of the stick of dynamite, the rapid and instantaneous release of energy can cause a violent explosion. On the other hand, the controlled release of energy from gasoline allows for safer and more manageable energy output, reducing the risk of accidents and minimizing potential harm.
Efficiency: The rate at which energy is output affects the efficiency of a system. In many practical applications, such as engines or power generation, it is desirable to convert energy into useful work as efficiently as possible. Controlling the rate of energy release allows for a more efficient conversion of energy, minimizing waste and maximizing the desired output.
Control and Functionality: Different systems require energy to be released at specific rates to perform their intended functions. For example, in an internal combustion engine, the controlled and timed release of energy from fuel allows for the synchronized movement of engine components, resulting in the desired mechanical work. Controlling the rate of energy output ensures that a system operates effectively and performs its intended function.
Environmental Impact: The rate at which energy is output can also impact the environment. In processes that release energy too rapidly or uncontrollably, such as certain combustion reactions or explosions, there can be significant environmental consequences, including air pollution, damage to ecosystems, and the release of harmful byproducts. Controlling the rate of energy release allows for better management and mitigation of these environmental impacts.
Overall, the rate at which energy is output from a system is crucial for safety, efficiency, control, functionality, and environmental considerations. By regulating and optimizing the rate of energy release, we can ensure that energy is utilized effectively and responsibly in various applications.
how is atom and molecules related to our sense of smell?
Answers
Answer:
Atoms themselves do not have a smell. Molecules do.
Explanation:
What happens is that particular molecules bind to receptors in our nose, activating nerves, that then send signals to our brain, which we then interpret and perceive as “smells”. Different molecules bind to different receptors, which is why we can perceive a number of different smells
Present day glaciers are found primarily in_____
A. Canada and Greenland
B. Canada and Iceland
C. Antarctica and Greenland
D. Antarctica and Iceland
Answers
C. Antarctica and Greenland
8. A 25.0 mL sample of an H2SO4 solution is titrated with a 0.186 M NaOH solution. The equivalence point is reached with 12.9 mL of base. The concentration of H2SO4 is ________ M. (Hint: write a balanced chemical equation first!)
Answers
Answer:
0.0480 M
Explanation:
The reaction is ...
H₂SO₄ + 2NaOH ⇒ Na₂SO₄ +2H₂O
That is, 2 moles of NaOH react with each mole of H₂SO₄. Then the molarity of the H₂SO₄ is ...
moles/liter = (0.186 M/2)(12.9 mL)/(25.0 mL) ≈ 0.0480 M
A 2.50M solution of NaOH is diluted from a volume of 0.890L to a volume of 2.00L, What is the new molarity?
O 2.78011
O 1.11M
O 5.62M
O 4.5M
Answers
Answer:
1.11 M
Explanation:
M₁V₁ = M₂V₂
Step 1: Define
Molarity₁ = 2.50 M
Volume₁ = 0.890 L
Molarity₂ = unknown
Volume₂ = 2.00 L
Step 2: Substitute and Evaluate for M₂
(2.50 M)(0.890 L) = (M₂)(2.00 L)
2.225 = M₂(2.00 L)
M₂ = 1.1125 M
Step 3: Simplify
We are given 3 sig figs.
1.1125 M ≈ 1.11 M
the table below gives the atomic number of elements w x and y and z.The the letters do not represent the actual symbols of the elements .
W. X Y. Z
9. 10. 11. 12
which one of the element is less reactive explain .
Answers
Element w is less reactive than elements x, y, and z. The element with the lower atomic number is typically less reactive.
Element w has an atomic number of 9, element x has an atomic number of 10, element y has an atomic number of 11, and element z has an atomic number of 12. Based on this information, we can conclude that element w is less reactive than elements x, y, and z.
This is because the reactivity of an element is largely determined by the number of valence electrons it has. Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical reactions. Elements with fewer valence electrons are less reactive because they are more stable. Element w has only one valence electron, while elements x, y, and z have two, three, and four valence electrons, respectively.
In general, elements with a full outermost shell of electrons, such as the noble gases, are the least reactive because they are highly stable. Elements that are close to having a full outermost shell, such as element w, are also relatively stable and less reactive. On the other hand, elements with only a few valence electrons, such as the alkali metals, are highly reactive because they are trying to gain or lose electrons in order to achieve a full outermost shell.
Overall, the reactivity of an element is determined by its electronic structure, with elements having fewer valence electrons generally being less reactive than those with more. In the case of the elements w, x, y, and z, we can see that element w has the fewest valence electrons and is therefore the least reactive.
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How are models used in chemistry? How does evidence change these models?
Answers
Answer: As they develop theories, chemists use models to attempt to explain their findings. Chemists assess the model they are using as new evidence becomes available and, if required, continue to refine it by making modifications.
Explanation:
Help me out here I don’t understand please :((((((, ppl srsly answer my questions a week later :/
Answers
Answer:
2. For any given isotope, the sum of the numbers of protons and neutrons in the nucleus is called the mass number.
3. in fact, electron mass is so small that it is not counted in an atom's mass
Explanation:
]All organic compounds contain the element carbon but, not all compounds containing the element “carbon”are organic .Justify this statement.
Answers
The statement "All organic compounds contain the element carbon, but not all compounds containing the element 'carbon' are organic" can be justified based on the definition and characteristics of organic compounds.
Organic compounds are compounds primarily composed of carbon and hydrogen atoms, often with other elements like oxygen, nitrogen, sulfur, and phosphorus. These compounds are typically associated with living organisms and are known for their unique properties and behavior, including the ability to form complex structures, exhibit covalent bonding, and undergo organic reactions.
On the other hand, there are compounds that contain carbon but are not classified as organic. One notable example is carbon dioxide (\(CO_{2}\)), which is a simple inorganic compound composed of carbon and oxygen. Carbon dioxide does not possess the characteristic properties of organic compounds, such as the ability to form long chains or undergo organic reactions.
Additionally, there are inorganic compounds like carbonates (such as calcium carbonate) and carbides (such as calcium carbide) that contain carbon but are not considered organic. These compounds have distinct chemical and physical properties different from those of organic compounds.
In summary, while all organic compounds contain carbon, not all compounds containing carbon are organic. The classification of a compound as organic or inorganic depends on its overall molecular structure, bonding, and characteristic properties.
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What is the maximum number of covalent
bonds that a carbon atom can form?
A. 1
B. 2
C. 3
D. 4
Answers
Answer:
D. 4
Explanation:
Answer and Explanation: Carbon can form a maximum of four covalent bonds. Carbon can share up to four pairs of electrons, therefore, the carbon atom fills its outer energy level and achieves chemical stability.
automotive batteries are an example of corrosive materials
Answers
Automotive batteries are an example of corrosive materials which comes under class 9 category.
Automotive batteries are most hazardous. lithium-ion and lithium-metal batteries, which fall into the Class 9 category. This means that they must be disposed of according to the regulations for hazardous waste. If you are unsure about which class your battery falls under, you can check with your local safety department to find out how to properly dispose of it. When you’re transporting automotive batteries, you must make sure that you package them separately. You must make sure that the terminals are separated from each other and not part of the stacking structure. When you’re disposing of a car battery, you must make sure that the battery is packaged properly. Then, you must label it as hazardous materials and make sure it is packed correctly. The packaging should also include the UN number and the proper description of the material. It can cause damage. we should be careful handling automotive batteries.
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Which is the function of the organ shown below
Answers
Answer:
c the pancreas produce enzyme that breakdown carbohydrate protein and fat
Thermal energy is added to four identical samples of water.  what increases in each sample A. Mass B. density C. Kinetic energy
Answers
Answer:
Kinetic energy
Explanation:
Di ako sure kung Tama
The partial pressures of gases A, B, and C in a mixture are
0.75 atmosphere, 0.25 atmosphere, and 1.25 atmospheres,
respectively. What is the total pressure of the gas mixture
in millimeters of Hg?
A. 1710 mm of Hg
B.
1140 mm of Hg
C. 760.0 mm of Hg
D. 570.0 mm of Hg
Answers
Answer:
A
Explanation:
.75 + .25 + 1.25 = 2.25 atm
1 atm is 760 mm hg
2.25 * 760 = 1710 mm HG
Answer:
\(\huge\boxed{\sf 2.25\ atm = 1710\ mm\ of\ Hg}\)
Explanation:
Partial pressure of gas A = 0.75 atm
Partial pressure of gas B = 0.25 atm
Partial pressure of gas C = 1.25 atm
Total partial pressure = 0.75 atm + 0.25 atm + 1.25 atm
= 2.25 atm
We know that:
1 atm = 760 mm of Hg
Multiply 2.25 to both sides
2.25 atm = 760 × 2.25 mm of Hg
2.25 atm = 1710 mm of Hg
\(\rule[225]{225}{2}\)
Which of the following grouping contains only representative elements?
A. Na, Co, S
B. Ni, Ga, Zn
c. AI, Mg, LÍ
D. CI, O, Cd
Answers
Answer:
C
Explanation:
Al=Aluminum
Mg=Magnesium
Which of the items below is a colloid?
a.fruit salad b.gelatin c.lacquer
Answers
Answer:
b. gelatin
Explanation:
a homogeneous noncrystalline consisting of large molecules or ultramicroscopic particles of one substance.
If you blew up a balloon inside an air-conditioned house and then brought it outside on a hot summer day, then what do you expect to happen to the balloon?
Answers
Answer:
You can expect the balloon to expand a little
Explanation:
The molecules in the balloon will be heated up once they feel the warmth of the summer heat and start moving a lot faster
if there are more products than reactants, does that mean there is an increase in the forward or backward reaction? And if there are more reactants that products, is there an increase in the forward or backward reaction?
Answers
Answer:
If there are more products than reactants, that means the reaction has shifted towards the left, which is the backward direction. If there are more reactants than products, that means the reaction has shifted towards the right, which is the forward direction.
10
The reaction in which ammonia is formed is N2(g) + 3H2(g) + 2NH3(). At equilibrium, a
1-L flask contains 0.15 mol H. 0.25 mol N, and 0.10 mol NH. Calculate K., for the reaction.
11.85
23.8
25.0
16
Answers
The equilibrium constant (K) : 11.85
Further explanationGiven
Reaction
N₂(g) + 3H₂(g) ⇒ 2NH₃(g)
Required
K(equilibrium constant)
Solution
The equilibrium constant (K) is the value of the concentration product in the equilibrium
The equilibrium constant based on concentration (K) in a reaction
pA + qB -----> mC + nD
\(\tt K=\dfrac{[C]^m[D]^n}{[A]^p[B]^q}\)
For the reaction above :
\(\tt K=\dfrac{[NH_3]^2}{[N_2][H_2]^3}\\\\K=\dfrac{0.1^2}{0.25\times 0.15^3}\\\\K=11.85\)
KCIO3 decomposes according to thereaction below:
2KCIO3 → 2KCI + 302
How many moles of O2 form when
2.0 mole of KCIO3 decomposes?
Answers
When 2.0 moles of KCIO3 decompose, 2.0 moles of O2 will form.
The balanced chemical equation shows that 2 moles of KCIO3 decompose to produce 3 moles of O2. Therefore, we can use the stoichiometric ratio from the balanced equation to determine the number of moles of O2 formed when 2.0 moles of KCIO3 decompose.
According to the stoichiometry, 2 moles of KCIO3 produce 3 moles of O2. Therefore, we can set up a proportion:
(2 moles KCIO3 / 2 moles O2) = (2.0 moles KCIO3 / x moles O2),
where x represents the unknown number of moles of O2 formed.
Simplifying the equation:
(2 moles KCIO3 / 2 moles O2) = (2.0 moles KCIO3 / x moles O2),
1 = (2.0 moles KCIO3 / x moles O2),
Cross-multiplying:
x moles O2 = (2.0 moles KCIO3 / 1),
x moles O2 = 2.0 moles KCIO3.
Therefore, when 2.0 moles of KCIO3 decompose, 2.0 moles of O2 will form.
It is important to note that this calculation assumes complete and ideal conditions, where the reaction proceeds with 100% efficiency. In reality, the actual yield of O2 may be lower due to various factors such as side reactions or incomplete decomposition. To determine the actual yield, additional information or experimental data would be required.
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Of the following regions of the electromagnetic spectrum, which one has the shortest wavelength?
a.
gamma rays
b.
infrared
c.
radio waves
d.
X rays
e.
microwaves
f.
ultraviolet
Answers
Answer:
A ---->gamma ray
Explanation:
Gamma rays have the highest frequencies among all electromagnetic waves and therefore have the shortest wavelengths.
How many neutrons does Carbon- 14 and Carbon -15 have? *
Answers
Answer: 8 for both
Explanation:
For the unbalanced reaction below, calculate how many grams of oxygen form when 2.72 g of potassium chlorate completely reacts.
KClO3(s) --> KCl(s) + O2(g)
Answers
Answer:
1.06g O2
Explanation:
Let's first balance the equation.
2KClO3 > 2KCl + 3O2
We're going to go from:
Grams of KClO3: 2.72gto moles, using molar mass of KClO3: 122.5g/molWe'll convert to O2 using a mole ratio, where we have 2 mols of KClO3 to 3 mols of O2.To grams of O2 using molar mass: 32g/mol\(2.72g x (\frac{1 mol}{122.5g} * \frac{3 mol O2}{2 mol KClO3} * \frac{32g}{1 mol} )= 1.06 g\)
How many atoms are in a 591 g sample of gold?
116,000 atoms
1.81 × 1024 atoms
3.00 atoms
3.60 × 1025 atoms
Answers
The number of atoms present in 591 g of gold is 1.81×10²⁴ atoms
Avogadro's hypothesisFrom Avogadro's hypothesis,
1 mole of Gold = 6.02×10²³ atoms
But
1 mole of gold = 197 g
Thus,
197 g of gold = 6.02×10²³ atoms
How to determine the atoms in 591 g of gold197 g of gold = 6.02×10²³ atoms
Therefore,
591 g of gold = (591 × 6.02×10²³) / 197
591 g of gold = 1.81×10²⁴ atoms
Thus, 1.81×10²⁴ atoms is present in 591 g of gold.
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Write the net ionic equation for the following molecular equation. 2FeCl3(aq) + 3(NH4)2CO3(aq) Fe2(CO3)3(s) + 6NH4Cl(aq)
Answers
2Fe³⁺(aq) + 6Cl⁻(aq) + 6NH₄⁺(aq) + 3CO₃²⁻(aq) → Fe₂(CO₃)₃(s) + 6NH₄⁺(aq) + 6Cl⁻(aq)
Next, we cancel out any spectator ions that appear on both sides of the equation, which in this case is the 6NH₄⁺ and the 6Cl⁻.
The resulting net ionic equation is:
2Fe³⁺(aq) + 3CO₃²⁻(aq) → Fe₂(CO₃)₃(s)
Therefore, the net ionic equation for the given molecular equation is:
2Fe³⁺(aq) + 3CO₃²⁻(aq) → Fe₂(CO₃)₃(s)
upon heating 1123g MgSO4.7 H2O
how many grams of water can be obtained?
how many grams of anhydrous compound van be obtained?
Answers
If 70 mL of a 0.4 M Ba(NO3)2 solution is mixed with excess amount of a Na2CO3 solution, what is the theoretical yield of the precipitate
Answers
The theoretical yield of BaCO3 is 5.5
What is theoretical yield?The theoretical yield is the yield calculated from the stoichiometry of the reaction. The equation of the reaction is;
Ba(NO3)2(aq) + Na2CO3 (aq) ------> BaCO3(s) + 2NaNO3(aq)
Number of moles of limiting reactant: 0.4 M × 70/1000 = 0.028 moles
Since the reaction is 1:1,om;y 1 mole of BaCO3 is formed. Hence, mass of BaCO3 = 0.028 moles × 197 g/mol = 5.5g
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HEY GUYS what has been the highlight of your day
Answers
Answer:
Earlier today, my friend got a call from the company where she had recently applied for a job. They informed her that she had been selected for an interview, which was scheduled for later this week. She was overjoyed and relieved to hear the news, as she had been searching for a job for several months and this was one of the positions she was most excited about. The call was definitely the highlight of her day, and it put her in a great mood for the rest of the afternoon! :) She immediately called her parents and friends to share the good news and celebrate!!