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3 years ago

Calculate the mass of 9.75x1021 atoms of helium.

Chemistry

1 answer:

Leya [2.2K]3 years ago

5 0

Answer: 99.5475

Hope this helps(:

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Lead (II) Acetate + Potassium Chromate

castortr0y [4]

Answer:

SOMEONE HURRY AND ANSWER THIS

Explanation:

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2 years ago

How many moles of water as a gas can be formed 2.45 L

Alex17521 [72]

Answer:

0.11mole

Explanation:

Let us assume that the condition is at standard temperature and pressure(STP);

Given parameters:

Volume of water = 2.45L

Unknown:

Number of moles found in this volume of water = ?

Solution;

At STP;

Number of moles = $\frac{volume of gas}{22.4}$

Input the parameters and solve;

Number of moles of water = $\frac{2.45}{22.4}$ = 0.11mole

The number of moles of water found is 0.11mole

4 0

3 years ago

Assuming that the solubility of radon in water with 1 atm pressure of the gas over the water at 30 ∘C is 7.27×10−3M, what is the

Daniel [21]

Answer:

K = 137.55 atm/M.

Explanation:

The relationship between gas pressure and the concentration of dissolved gas is given by Henry’s law:

where P is the partial pressure of the gaseous solute above the solution (P = 1.0 atm).

k is a constant (Henry’s constant).

C is the concentration of the dissolved gas (C = 7.27 x 10⁻³ M).

∴ K = P/C = (1.0 atm)/(7.27 x 10⁻³ M) = 137.55 atm/M.

4 0

3 years ago

Carbon-14 has a half-life of 5720 years and this is a fast-order reaction. If a piece of wood has converted 75 % of the carbon-1

Nana76 [90]

Answer:

11445.8years

Explanation:

Half-life of carbon-14 = 5720 years

First we have to calculate the rate constant, we use the formula :

7 0

3 years ago

No matter where you are on Earth, the center of the Earth is always _______.

FinnZ [79.3K]

Answer:

D) straight down

Hope this helps!

4 0

2 years ago

Read 2 more answers