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Luda [366]
3 years ago
11

Please help me! I am offering 100 points and brainliest!

Chemistry
1 answer:
puteri [66]3 years ago
5 0

Explanation:

Since density is calculated with mass divided by volume, changing either of these variables will affect the density, not necessarily both of them. If only the volume is increased or only the mass is decreased, the density will decrease. If only the volume is decreased or only the mass in increased, the density will increase.

Example:

Original density is 50g/ml. Mass is 50g and volume is 1ml.

Increase mass only:

mass = 100g

Density = 100g/ml   <= Density is increased

Decrease mass only:

mass = 25g

Density = 25g/ml   <= Density is decreased

Increase volume only:

volume = 2ml

Density = 50g/2ml = 25g/ml   <= Density is decreased

Decrease volume:

volume = 0.5ml

Density = 50g/0.5ml = 100g/ml   <= Density is increased

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Now

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5.00 moles of a binary, group 2 oxide are found to have a mass of 521 g. Identify the group 2 metal
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5.00 moles of a binary, group 2 oxide are found to have a mass of 521 g. The group 2 metal is Strontium.

According to question 5 moles of binary group 2 metal oxide mass =521  g

So, 1-mole metal oxide mass will be =521 / 5=104.2 g

Now, as metal oxide is group 2 oxide so metal: oxygen =1: 1

So the mass of metal is =104.2-16=88.2 gm (as the atomic mass of oxygen is 16 g

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