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Marianna [84]
3 years ago
7

What are three things that the elements Magnesium, Calcium and Barium have in common?

Chemistry
1 answer:
Volgvan3 years ago
6 0

Answer:

1.They are all in the second group of the periodic table

2.They are an alkaline earth metal

3.They all have a shine to them

4.They are all highly reactive

5.They have a silver/white to them

6.They can all be found in the Earths crust

I'm not really sure of any others that they have in common and I thought to give extra so you could choose.

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What is the volume of 13.21 g of ethane gas (C2H6) at STP?
yuradex [85]

The volume at STP : 9.856 L

<h3>Further explanation</h3>

Given

Mass of ethane : 13.21 g

Required

The volume at STP

Solution

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters / mol.

mol ethane(C2H6) :

= mass : molar mass

= 13.21 g : 30 g/mol

= 0.44

Volume at STP :

= 0.44 x 22.4 L

= 9.856 L

6 0
3 years ago
What is the mass of an object if its height is 10 meters above ground and its gravitational potential energy (GPE) is 3920 Joule
Serjik [45]

Answer:

40

Explanation:

Your trying to find out the meters so your going to divide 3920J by 10 and 9.8

3920/10/9.8

8 0
3 years ago
Cavendish’s name for hydrogen gas was "inflammable air." The word inflammable means "to burn. "Why did Cavendish use this name?
saul85 [17]
He used that name because if you lit hydrogen on fire it would catch. therefore, it was dangerous to be around. think of it as a kind of warning. :) hope that helps.
8 0
3 years ago
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Answer:

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This is cellular respiration. ↑

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