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DanielleElmas [232]
3 years ago
9

What is the volume of 0.20 moles of helium at STP?

Chemistry
1 answer:
SOVA2 [1]3 years ago
7 0

Answer:

Option (C) 4.5 liters

Explanation:

1mole of a gas occupy 22.4L at stp.

This implies that 1mole of He also occupy 22.4L at stp.

From the question given, we were asked to find the volume occupied by 0.20 mole of He at STP. This can be achieved by doing the following:

1mole of He occupied 22.4L.

Therefore, 0.2mol of He will occupy = 0.2 x 22.4L = 4.48 = 4.5L

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37.8g/ 10.81g/mol = 3.4968...moles

3 0
3 years ago
What is a planned goal of the Exploration Mission 2?
vova2212 [387]

Answer:

C. to explore the composition of Mars

Explanation:

Initially, in 2019, an unmanned mission is planned to orbit the moon. The spacecraft would flyby the moon.  In 2020's, the Exploration Mission 2 would be a manned mission on the same path around the moon. This would be the base for future goal of collecting samples from mars. In later of 2020's unmanned spacecraft would be sent to mars and a robot would collect the samples from the Martian surface. In 2030's, a crew would be sent to Mars.

6 0
3 years ago
Can someone help me please ?
KiRa [710]

Answer: B

Explanation:

Graph 1 represents an endothermic reaction, Graph 2 represents an exothermic reaction.

***If you found my answer helpful, please give me the brainliest. :) ****

3 0
3 years ago
Read 2 more answers
AYUDENME A CONTESTAR ESTO
Zigmanuir [339]

umm how do you begin answering that ??

8 0
3 years ago
Determine the formula weight of BeCl₂.
tia_tia [17]
Be= Beryllium= weight 9.01
Cl= Chlorine= weight 35.45
Since there are 2 Chlorine, you have to add Chlorine twice.
9.01 + 35.45 + 35.45= 79.91

Answer: 79.91
(This answer does not include sig.figs)
4 0
3 years ago
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