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3 years ago

Which best describes a role of animals in the water cycle? In the water cycle, clouds form as a result of

Chemistry

2 answers:

Ivenika [448]3 years ago

8 0

Answer:

Animals consume water, and they urinate. The moisture is evaporated by the sun, thus making clouds. Clouds are made out of evaporated water, and when they get full it rains and the cycle continues.

vredina [299]3 years ago

7 0

Answer:

Animals contribute water mainly through breathing, perspiration and urination. When droplets of sweat evaporate from the surface of an animal's skin, they take a bit of the animal's body heat with them. They also turn into water vapor and enter the water cycle, just like water evaporating from plant leaves. Clouds are created when water vapor, an invisible gas, turns into liquid water droplets. These water droplets form on tiny particles, like dust, that are floating in the air.

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Chemistry! help! Please!

VMariaS [17]

Answer:

2. a. All three solutes are nonelectrolytes.

3. a. the solution of solute X

Explanation:

The freezing point depression (ΔTf) and boiling point elevation (ΔTb) are colligative properties: they depend on the numbers of particles.

The formula for ΔTf is

ΔTf = iKf·b

i is the van’t Hoff factor: the number of moles of particles you get from a solute.

For sucrose,

Sucrose (s) ⟶ sucrose (aq)

1 mole sucrose ⟶ 1 mol particles i = 1

For NaCl

NaCl(s) ⟶ Na⁺(aq) + Cl⁻(aq)

1 mol 1 mol + 1 mol i = 2

For Ca(NO₃)₂

Ca(NO₃)₂(s) ⟶ Ca²⁺(aq) + 2NO₃⁻(aq)

1 mol 1 mol + 2 mol i = 3

===============

2. Freezing points

For a nonelectrolyte, i = 1.

Kf = 1.86 °C·kg⁻¹mol⁻¹

b = 1 mol/kg Calculate ΔTf

ΔTf = 1 × 1.86 × 1

ΔTf = 1.86 °C

Tf = Tf⁰ - ΔTf =0.00 °C – 1.86 °C = -1.86 °C

All the other solutions have lower freezing points, so the solutes must be electrolytes.

===============

3. Boiling points

The formula for ΔTb is

ΔTb = iKb·m

The solution with the highest boiling point will have the highest value of i.

In other words, the solution with the highest boiling point will be the one with the lowest freezing point.

That’s the solution of solute X.

5 0

3 years ago

Why the statement all atoms of one element have the same mass is false

White raven [17]

Some elements have isotopes which have a different number of neutrons, and this means they have different masses.

4 0

3 years ago

What will happen to the gas molecules in the container as thermal energy is applied?

klio [65]

Decreased because we all know what happen if we put it with thermal energy

3 0

3 years ago

Argue whether this chemical reaction supports or does not support the Law of Conservation of Matter.

Anit [1.1K]

Explanation:

The reaction is as follows:

2Mg(s) + O2(g) ---> 2MgO(s)

and the researcher said that 32 g of MgO was produced.

Stoichiometry:

28 g Mg × (1 mol Mg/24.305 g Mg) = 1.15 mol Mg

15 g O2 × (1 mol O2/15.999 g O2) = 0.938 mol O2

1.15 mol Mg × (2 mol MgO/2 mol MgO) = 1.15 mol MgO

1.15 mol MgO × (40.3044 g MgO/1 mol MgO) = 46.6 g MgO

0.938 mol O2 × (2 mol MgO/1 mol O2) = 1.88 mol MgO

1.88 mol MgO × (40.3044 g MgO/1 mol MgO = 75.6 g MgO

Based on these numbers, the amount of product after the reaction is much less than expected so these results don't seem to support the law of conservation of matter.

4 0

3 years ago

What is the difference between reactants and products in a chemical reaction

nalin [4]

Reactants are what is consumed in a chemical reaction while products are what is created by the chemical reaction.

7 0

3 years ago