2 years ago

Pls help me in this:(

Chemistry

1 answer:

antiseptic1488 [7]2 years ago

3 0

Answer:

a) 26.98

b) 3

c) 3* 1.01 = 3.03

d) 3 *16 = 48

e) 26.98 + 3.03 + 48 = 78.01

f) 6.023 * 10²³

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A student collects 629ml of oxygen at 0.500at, the student collected 0.0337 moles. At what temperature did the student collect t

VashaNatasha [74]

Answer:

114 K

Explanation:

Given data

Volume of oxygen (V): 629 mL = 0.629 L

Pressure of oxygen (P): 0.500 atm

Moles of oxygen (n): 0.0337 mol

Temperature (T): ?

We can calculate the temperature at which the student collected the oxygen using the ideal gas equation.

$P \times V = n \times R \times T\\T = \frac{P \times V}{n \times R} = \frac{0.500atm \times 0.629L}{0.0337mol \times 0.0821atm.L/mol.K} = 114 K$

The oxygen gas was collected at 114 K.

4 0

2 years ago

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Need helpppppp hurry pls, i just really need help

mojhsa [17]

Answer:

6.8 mole of O₂

Explanation:

Given expression:

2H₂ + O₂ → 2H₂O

Number of moles of H₂ = 13.6moles

Unknown:

Number of moles of O₂ = ?

Solution:

In the given problem, we are to find the number of moles of oxygen gas that will use up 13.6mole of hydrogen gas;

From the reaction equation;

2 mole of H₂ will completely react with 1 mole of O₂

13.6 moles of H₂ will completely be used up by $\frac{13.6}{2}$ mole of O₂

= 6.8 mole of O₂

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2 years ago

Earth is approximately 1.5x10^8 km from the sun. The speed of light is 3.0x10^8. How many minutes does it take for light to reac

Masteriza [31]

1.5 x 10 $^{8}$ mm = 1500 x 10 $^{8}$ m

1500 x 10 $^{8}$ / ( 3.0 x 10 $^{8}$ ) = 500 s

500/60 = 8.3

So approximately it takes 8.5 minutes

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3 years ago

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I would say that the answer has to be C
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3 years ago

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18. When a chemical reaction takes place in an open system, matter_____.

zheka24 [161]

A) can enter from the surroundings, but cannot escape to the surroundings

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3 years ago

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Pls help me in this:(​

Pls help me in this:(