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3 years ago

CAN SOMEONE ANSWER ME!! 5-6

Chemistry

1 answer:

docker41 [41]3 years ago

7 0

Answer:

As the axial tilt increases, then the seasonal contrast increases so that winters are colder and summers are warmer in both hemispheres. The northern hemisphere is tipped away from the Sun, producing short days and a low sun angle. What kind of effect does the earth's tilt and subsequent seasons have on our length of daylight (defined as sunrise to sunset). Over the equator, the answer is not much.

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What is the freezing point of glucose?

Triss [41]

Answer:

In Fahrenheit it is 294.8°F and in Celsius it is 146°C.

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3 years ago

Which best explains how heat plays a role in the movement of materials within Earth's interior?

vfiekz [6]

Answer:

Hot material near the core is less dense and rises, when it cools, it becomes more dense and sinks.

Explanation:

This best explains how heat plays a role in the movement of materials within Earth's interior because it's how convection works. Convection is the circular motion that happens when warmer air or liquid which has faster moving molecules, making it less dense rises, while the cooler air or liquid drops down. Convection currents within the earth move layers of magma, and convection in the ocean creates currents.

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3 years ago

Read 2 more answers

Give the number of atoms of each type of sodium carbonate

Bad White [126]

Answer:What is the question

Explanation:

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3 years ago

Which of the following will have the slowest rate of diffusion at a given temperature?

marysya [2.9K]

<h3>Answer:</h3>

Chlorine gas (Cl₂)

<h3>Explanation:</h3>

According to the Graham's law of diffusion, the diffusion rate of a gas is inversely proportional to the square root of its density or molar mass.
Therefore, a lighter gas will diffuse faster at a given temperature compared to a heavy gas.
Consequently, the heavier a gas is then the denser it is and the slower it diffuses at a given temperature and vice versa.

In this case we are given gases, CI₂

, H₂,He and Ne.

We are required to identify the gas that will diffuse at the slowest rate.
In other words we are required to determine the heaviest gas.

Looking at the molar mass of the gases given;

Cl₂- 70.91 g/mol

H₂- 2.02 g/mol

He - 4.00 g/mol

Ne- 20.18 g/mol

Therefore, chlorine gas is the heaviest and thus will diffuse at the slowest rate among the choices given.

8 0

3 years ago

Here is the information: A 1.2516 gram sample of a mixture of CaCO3 and Na2SO4 was analyzed by dissolving the sample and adding

tiny-mole [99]

Answer:

93,32 % (w/w)

Explanation:

The Ca²⁺ of CaCO₃ was completely precipitate to CaC₂O₄ that results in H₂C₂O₄. The titration of this one is:

3H₂C₂O₄ + 2H⁺ + MnO₄⁻ → Mn²⁺ + 4H₂O + 6CO₂

As you required 35,62mL of 0,1092M MnO₄⁻, the moles of H₂C₂O₄ are:

0,03562L× $\frac{0,1092M}{L}$ =

3,890x10⁻³mol of MnO₄⁻× $\frac{3molH_{2}C_{2}O_{4}}{1mol MnO_{4}^-}$ = <em>0,01167 mol of H₂C₂O₄</em>

The number of moles of CaCO₃ are the same number of moles of H₂C₂O₄ because every Ca²⁺ was converted in CaC₂O₄ that was converted in H₂C₂O₄. That means: <em>0,01167 mol of CaCO₃</em>

0,01167 mol of CaCO₃ are:

0,01167 mol of CaCO₃× $\frac{100,0869g}{1mol}$ = <em>1,168 g of CaCO₃</em>

As the mass of the initial mixture is 1,2516 g, the percentage by weight of CaCO₃ is:

$\frac{1,168g}{1,2516g}$ ×100 = <em>93,32 % (w/w)</em>

I hope it helps!

7 0

3 years ago