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s2008m [1.1K]
3 years ago
8

If a sample has a mass of 245.8 grams and takes up 94ml of space, what is the density of the sample?

Chemistry
1 answer:
allochka39001 [22]3 years ago
7 0

To find the density of any sample, you need to know the Mass (grams), and its Volume (measured in mL or cm³). Divide the mass by the volume in order to get a sample's Density.

 

Density (P)= Mass(m)/Volume(V)

P=m/V

P=245.8grams/94ml

<span>P=2.65grams per ml </span>

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4 0
3 years ago
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How many grams of kbr must be dissolved to make 25.0 ml of a solution that has a molarity of 0.85 m?
lyudmila [28]
Molarity is defined as the number of moles of solute in 1 L of solution 
molarity of solution to be prepared is 0.85 M
this means that there should be 0.85 mol of KBr in 1 L of solution 
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then 25.0 mL should contain - 0.85 mol / 1000 mL x 25.0 mL = 0.0213 mol 
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Drag each tile to the correct location on the image.
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Answer:

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[Kr]: 5s² 4d¹⁰ 5p⁵.

[Xe]: 6s² 4f¹⁴ 5d¹⁰ 6p².

Explanation:

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  • [He]:

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So, [He] can be written before the electronic configuration of 2s² 2p⁵.

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Ne contains 10 electrons fill (1s² 2s² 2p⁶).

So, [Ne] can be written before the electronic configuration of 3s².

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Xe contains 54 electrons is configured as ([Kr] 5s² 4d¹⁰ 5p⁶).

So, [Xe] can be written before the electronic configuration of 6s² 4f¹⁴ 5d¹⁰ 6p².

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