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Andrei [34K]
2 years ago
9

Need answers for Chemistry asap. Will give brainliest.

Chemistry
2 answers:
solniwko [45]2 years ago
7 0

Answer:

a) 0.4 moles

b) 0.3 moles

N76 [4]2 years ago
3 0

Answer:

Balance chemical equation is

O2(g) + 2H2(g) --> 2H20(g)

a. 0.20 mol 02 --> 0.225mol H20

b. 0.30 mol H2 --> 2.7mol H20

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Answer:

0.01 psi

Explanation:

If you look at the data points plotted on the graph, the slope of the line touches 0.1 for the y-axis when it is at 20 for the x-axis.

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2 years ago
Calculate the number of calories needed to increase the temperature of 50.0 g of copper metal from 21.0 degrees C to 75.0 degree
KonstantinChe [14]
<h3>Answer:</h3>

1031.4 Calories.

<h3>Explanation:</h3>

We are given;

Mass of the copper metal = 50.0 g

Initial temperature = 21.0 °C

Final temperature, = 75°C

Change in temperature = 54°C

Specific heat capacity of copper = 0.382 Cal/g°C

We are required to calculate the amount of heat in calories required to raise the temperature of the copper metal;

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Q = Mass × specific heat capacity × change in temperature

   = 50.0 g × 0.382 Cal/g°C × 54 °C

   = 1031.4 Calories

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3 years ago
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