You have a rock with a a volume of 15cm3 and a mass of 45 g. What is its density

Answer: 1. The mole ratio between Zn and ZnCl2 is 1:1. Therefore, if 5.00 moles of Zn react, 5.00 moles of ZnCl2 would be produced.

2. The mole ratio between Zn and HCl is 1:2. Therefore, if 5.00 moles of Zn react, 10.0 moles of HCl would be reacted.

Answer:

5.00 moles of ZnCl2 are produced.

10.00 moles of HCl are reacted.

Explanation:

The balanced chemical equation tells us that 1 mole of Zn reacts with 2 moles of HCl to produce 1 mole of ZnCl2. Therefore, if 5.00 moles of Zn are completely reacted, the same amount of moles of ZnCl2 will be produced, which is also 5.00 moles.

According to the balanced chemical equation, 1 mole of Zn reacts with 2 moles of HCl. Therefore, to react 5.00 moles of Zn, we would need 2 moles of HCl for each mole of Zn. Since we have 5.00 moles of Zn, we would need 2 moles of HCl for each mole of Zn, which totals to 10.00 moles of HCl. So, 10.00 moles of HCl would be reacted.

if 3.45 grams of magnesium are burned, 1.725 grams of magnesium oxide are produced. The chemical equation for the reaction of magnesium with oxygen is 2MgO.

Magnesium is a chemical element that is highly reactive, meaning that it easily reacts with other substances. When magnesium is burned in the presence of oxygen, it reacts with the oxygen to form magnesium oxide,

The chemical equation for the reaction of magnesium with oxygen is:

2Mg + O2 -> 2MgO

This equation tells us that for every 2 grams of magnesium that react with oxygen, 2 grams of magnesium oxide are produced. Therefore, if 3.45 grams of magnesium are burned, the number of grams of magnesium oxide produced can be calculated as:

3.45 grams Mg / 2 grams Mg/1 gram MgO = 1.725 grams MgO

Therefore, if 3.45 grams of magnesium are burned, 1.725 grams of magnesium oxide are produced.

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Answer:

Explanation:

A .

Answer:

C. Lead(IV) Chloride

Explanation:

Because PbCl4 has a transition metal we need to indicate the ionic charge using Roman numerals in parenthesis. This is placed directly after the metal.

The name of PbCl₄ is lead (IV) chloride. Therefore, option C is correct.

Lead (IV) chloride (PbCl₄) is a hypothetical compound, it does not exist under normal conditions. The highest oxidation state that lead typically exhibits is +4, but it is highly unstable and tends to be disproportionate to lower oxidation states.

Lead commonly forms compounds such as lead (II) chloride (PbCl₂), where lead has an oxidation state of +2. In PbCl₂, each lead atom is bonded to two chloride ions. This is the most stable and commonly observed form of lead chloride.

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Answer:

1.T

2.T

3.T

4.F

5.F

6.T

7.T

8.F

9.T

10.T

11.F

12.S

13.T

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Answer:

58.53 L

Explanation:

Ideal gas equation is

PV = nRT

P - the pressure of the gas = 104.5  KPa

V- the volume occupied by the gas

n  - the number of moles of gas =2.50

R - the universal gas constant, usually given as  0.0821 atm.L/(mol K)

T - the absolute temperature of the gas.= 298K

\(V =\frac{nRT}{P}\)

Now substituting vales we get

\(V = \frac{2.5\times0.0821\times298}{104.5\times1000}\)

V = 58.53 L

Answer:

The answer is option A.

its reactivity

I hope this helps you.

Answer:

A) Reactivity

Explanation:

Reactivity is one of the characteristics of a chemical property. The copper that turned color due to air, has a different chemical composition.

It wouldn't be flammability - even though it is a chemical property, but nothing is burning.

All the other answer choises: mass and volume are physical properties. Basically the PHYSICAL characteristics which doesn't change the composition.

Hope this helps!

Answer:

How they get into the environment

Answer:

friction

Explanation:

conduction doesn't really need much to start it. it basically has that reaction from the start so it's not conduction. Since heat is produced by friction in this situation it causes static to happen. so i think its friction

Answer:

The correct answer is B] Feeling the grains of salt in between your fingers.

Explanation:

Evidence that matter is too small to be seen without magnification includes feeling the grains of salt in between your fingers, because the individual grains of salt are too small to be seen with the eye. Other examples of matter that is too small to be seen without magnification include atoms, molecules, and subatomic particles.

A] Feeling the heat come off the flames of a fire, C] Watching salt disappear when it dissolves in water, and D] Watching rain fall from the sky during a thunderstorm are all examples of phenomena that are caused by matter, but they do not necessarily provide evidence that matter is too small to be seen without magnification.

The value of Kp for the reaction is 62.9 at 400 K in a given case.

The equilibrium constant expression for the reaction is:

\(Kp = (PNCl / PNO)² x (PNClO / PCl₂)\)

The equilibrium constant, denoted as K, is a quantitative measure of the extent to which a chemical reaction proceeds to reach equilibrium. It is defined as the ratio of the product of the concentrations of the products raised to their stoichiometric coefficients, to the product of the concentrations of the reactants raised to their stoichiometric coefficients,

where PNO, PCl₂, and PClO are the partial pressures of NO, Cl2, and NOCl, respectively.

Substituting the given values:

Kp = (0.28 / 0.095)² x (0.28 / 0.171)

Kp = 62.9 (rounded to three significant figures)

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Answer:

7.49 × 108

Explanation:

Scientific notation is a way to express numbers in a form that makes numbers that are too small or too large more convenient to write. It is commonly used in mathematics, engineering, and science, as it can help simplify arithmetic operations. In scientific notation, numbers are written as a base, b, referred to as the significant, multiplied by 10 raised to an integer exponent, n, which is referred to as the order of magnitude:

Answer:

False. Humans are the only reason the earth is polluted

hope this helps :)

The question is incomplete, the complete question is;

Atom Number of protons Number of electrons Number of neutrons

1 39 39 52

2 40 40 50

3 39 39 54

4 40 40 51

Based on the information that is given, which atom in the table has the highest mass?

a. 1

b. 2

c. 3

d. 4

Answer:

c

Explanation:

The relative atomic mass is given as; number of protons + number of neutrons. If we take the relative atomic mass of each of the options;

1) 39 +52 = 91

2) 40+50 = 90

3) 39 + 54 = 93

4) 40 + 51 = 91

Thus 3 has the highest mass as seen above, hence the answer given.

At the end of glycolysis, one can find the energy that was contained in the chemical bonds of glucose in ATP, NADH and pyruvate molecule.

The process of glycolysis takes place in the cytosol of a cell. It can be broken down into two phases viz. energy requiring phase and energy releasing phase.

Energy requiring phase: The starting molecule i.e glucose is at first rearranged and two phosphate groups are attatched to it, which comes from ATP.  The phosphate groups form the sugar- fructose-1,6-biphosphate. This splits into three-carbon sugars

Energy releasing phase: The three carbon-sugars are converted into three-carbon molecules i.e two ATP molecules and one NADH molecule and pyruvate.

Thus, in ATP, NADH and pyruvate we can find the energy contained in chemical bonds of glucose.

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Answer:

True

Explanation:

The greenhouse effect is a natural process that occurs when certain gases in the atmosphere, such as carbon dioxide and water vapor, trap heat from the sun. This keeps the Earth's temperature within a range that is suitable for life. However, an increase in the amount of greenhouse gases, such as from human activities like burning fossil fuels, can intensify the greenhouse effect and lead to global warming. This warming can have a range of impacts on the environment, such as melting ice caps, rising sea levels, and more frequent and severe weather events.

Answer:

848.4 moles of Co

Answer:

2:3

Explanation:

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The volatile is defined as the speed or rate at which a substance evaporates when exposed to the air.

The Volatility is indicated by the  substance's vapor pressure. It is the tendency of the substance to the speed at which it vaporizes or evaporates. The Substances with the higher vapor pressure will be vaporize more easily at the given temperature than compared to the substances with the lower the vapor pressure.

Thus, the speed or rate at which a substance evaporates when exposed to the air is termed as the volatility. It is tendency of the substances to get vaporize.

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Answer:OH^- ion

Explanation: When LiOH added in water then LiOH dissociated in Li+ and OH- . Water is a composition of H+ and OH- ions hence concentration of OH- ions will be increased after adding LiOH.

Answer:nope nope

Explanation:just no

Answer:

30mL is required

30ml of a 2.50 M hydrochloric acid solution is required to make 100.0 mL of a 0.750 M solution.

HCl is an acid which is made up of hydrogen and chlorine gas.

By the formula of dilution

M1V1 = M2V2

where V1 = 2.50 m

M2 = 100.0

V2 = 0.750 m

M1 × 2.50 m = 100.0 × 0.750 m

M1 = 30 ml

Thus, the M1 is 30 ml option a is correct.

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Formulate an argument for or against nuclear power it should be well thought-out and a minimum of seven complete sentences and they are water intensive and environmental impact

Nuclear power is the clean and efficient way of boiling water to make stream and which turn turbined to produce electricity and the nuclear power plant use enriched uranium fuel to produce electricity through process called fission

And the argument against nuclear power is

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The empirical formula of a compound containing 0.347 mole P to 1.031 mole Cl is PCL3.

Empirical formula can be defined as a chemical formula, showing the ratio of elements in a compound rather than the total number of atoms.

From the given question,

Pick the smallest number in mole and then divide all the compound by that. Remember that if you calculate a number that is x0.9 round to the nearest whole number,

⇒ 0.347 moles of P / 0.347 = 1

⇒ 1.031 moles of Cl / 0.347 = 2.971 ≈ 3,

Lastly, the coefficients calculated in the previous step will become the subscripts in the chemical formula.

⇒ PCL3

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Answer:

1 Once proteins, fats and carbohydrates are digested, absorption takes place in the small intestine.

2 if we eat food we get energy, but if there weren't chemical reaction in your body nothing happens.

Explanation:

1 Most of the digestion occurs in the first part of the small intestine while the absorption of broken down nutrients, water, vitamins, and minerals occurs in the rest of it.

Answer:

single covalent bond

Explanation:

The bond formed between two atoms each sharing one electron is called single covalent bond

The figure 1 is the structure of diamond. The type of bond in diamond is covalent sp³ bond. DIamond exists in hexagonal arrangement of carbon atoms.

Allotropes are substances formed from a single elements with different number in various size and shape. Carbon exhibit catenation property which means it can forms chains with other carbon in any large number.

The allotropes of carbon are diamond, graphene and fullerene. Diamond is hexagonal arrangement of carbons atom bonded covalently in sp³ hybridisation.

In graphene as shown in the second figure, bonded carbons atoms are arranged as layers where carbon is in sp²hybridisation. In the case of fullerenes, there are both hexagonal and pentagonal rings adjacent to each and are formed by 60-70 carbons.

In all these allotropes, the bond type between two carbons atoms is covalent. Covalent bond is formed by sharing of electrons between the two atoms.

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Answer:

I could be wrong but I am pretty positive that the correct order is grasses and shrubs to guanacos to pumas.

Answer:

Five Types of Introductions.

“Inquisitive” Explain why your subject is important, curious, or interesting.

“Paradoxical” Explain what aspects of your subject seem improbable. ...

“Corrective” Explain how your subject has been misunderstood or misrepresented by others. ...