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3 years ago

PLS HELP! I NEED THIS!!!!

Chemistry

2 answers:

masha68 [24]3 years ago

7 0

I’m sure it’s 6 km/h south

Kazeer [188]3 years ago

3 0

I believe it’s 6km/ south

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Hydrogen sulfide gas (H2S) is a highly toxic gas that is responsible for the smell of rotten eggs. The volume of a container of

irinina [24]

Answer:

$\boxed{\text{0.0301 g}}$

Step-by-step explanation:

1. Calculate the initial moles of H₂S

We can use Avogadro's law: the number of moles of a gas is directly proportional to the volume if the pressure and temperature are constant.

$\dfrac{n_{1} }{V_{1}} = \dfrac{n_{2}}{V_{2}}\\\\\dfrac{n_{1}}{\text{44.2 mL}} = \dfrac{1.97 \times 10^{-3} \text{ mol}}{\text{98.5 mL }}\\\\\dfrac{n_{1}}{44.2} = 2.00 \times 10^{-5} \text{ mol}\\\\n_{1} = 44.2 \times 2.00 \times 10^{-5} \text{ mol} = 8.84 \times 10^{-4} \text{ mol}$

2. Calculate the initial mass of H₂S

$\text{Mass of H$_{2}$S} = 8.84 \times 10^{-4}\text{ mol H$_{2}$S} \times \dfrac{\text{34.08 g H$_{2}$S}}{\text{1 mol H$_{2}$S}} = \text{0.0301 g H$_{2}$S}\\\\\text{The container initially held }\boxed{\textbf{0.0301 g H$_{2}$S}}$

4 0

4 years ago

A chemist prepares a solution of silver perchlorate by measuring out of silver perchlorate into a volumetric flask and filling t

djverab [1.8K]

Complete Question:

A chemist prepares a solution of silver (I) perchlorate (AgCIO4) by measuring out 134.g of silver (I) perchlorate into a 50.ml volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the silver (I) perchlorate solution. Round your answer to 2 significant digits.

Answer:

13 mol/L

Explanation:

The concentration in mol/L is the molarity of the solution and indicates how much moles have in 1 L of it. So, the molarity (M) is the number of moles (n) divided by the volume (V) in L:

M = n/V

The number of moles is the mass (m) divided by the molar mass (MM). The molar mass of silver(I) perchlorate is 207.319 g/mol, so:

n = 134/207.319

n = 0.646 mol

So, for a volume of 50 mL (0.05 L), the concentration is:

M = 0.646/0.05

M = 12.92 mol/L

Rounded to 2 significant digits, M = 13 mol/L

7 0

3 years ago

................ is the organic molecule that is the main energy source for cell processes and is made with the energy released

hoa [83]

Answer:

ATP

Explanation:

it is made by breaking glucose down

5 0

3 years ago

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At standard temperature and pressure, what is the volume of one mole of gas?

Stells [14]

Answer:

A. 22.41

Explanation:

goodluck man, just typing a little bit more for the 20 words

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3 years ago

The match between an individual's temperament and the environmental demands with which the individual must cope is known by the

Black_prince [1.1K]

Answer:

Goodness of fit

Explanation:

The goodness of fit - it is proposed by Thomas and chess in 1977. This term is used to defined coordination of child temperament and environment. while poorness of fit defines when temperament is not accommodated.

The goodness of fit is generally good for children's best learning. it is basically related to individual temperament and their social environment

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3 years ago

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