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I am Lyosha [343]
3 years ago
13

Which of the following rocks is formed by cooling lava?

Chemistry
1 answer:
Leokris [45]3 years ago
6 0

Answer:

obsidian

Explanation:

obsidian forms when lava (magma) shoots out of the volcano, and cools rapidly

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If an atom loses two electrons what charge will it have ? <br><br> +2 <br> -1<br> +1<br> -2
Citrus2011 [14]

Answer:

+2

Explanation:

Because an electron has a negative charge.

6 0
4 years ago
Write the chemical formula for gallium an IOdine
Galina-37 [17]
That would be GaI3. :)
7 0
4 years ago
What two conversion factors would you need in order to determine the number of moles of H 2O used to run the reaction?
blagie [28]

Answer:

mol ratio and molar mass

Explanation:

8 0
3 years ago
A container initially holds 1.24mol of hydrogen gas and has a volume of 27.8L. Hydrogen gas was added to the container, and the
Fantom [35]

Answer:

After increasing the volume, we have 1.81 moles of hydrogen gas in the container

Explanation:

Step 1: Data given

Number of moles hydrogen gas (H2) = 1.24 moles

Volume of hydrogen gas (H2° = 27.8 L

The final volume is increas to 40.6 L

Step 2: Calculate the new number of moles

V1/n1 = V2/n2

⇒with V1 = the initial volume = 27.8 L

⇒with n1 = the initial number of moles H2 = 1.24 moles

⇒with V2 = the final volume = 40.6 L

⇒with n2 = the new number of moles = TO BE DETERMINED

27.8L / 1.24 moles = 40.6 L / n2

n2 = 40.6 / (27.8/1.24)

n2= 1.81 moles

After increasing the volume, we have 1.81 moles of hydrogen gas in the container

3 0
3 years ago
What is an example of a place formed by hot spot volcanoes
castortr0y [4]
Hawaii, Iceland, and Yellowstone are examples of places that were formed by hot spot volcanoes.
Hope this helps!
6 0
3 years ago
Read 2 more answers
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