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Softa [21]
3 years ago
10

How many moles are there in 40g of calcium

Chemistry
1 answer:
drek231 [11]3 years ago
8 0
40 grams ÷ 40.08 grams/moles = 1 mole
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A block of metal has a mass of 0.0694 kg. It displaces 3.6 mL of water. What is it’s density in g/cm^3
Ivan

Answer:

19.28 g/cm^3 to the nearest hundredth.

Explanation:

The volume of water displaced = the volume of the metal.

density = mass / volume

0.0694 kg = 0.0694 * 1000

=  69.4 g.

Density = 69.4 / 3.6

= 19.28 g/cm^3.

4 0
3 years ago
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worty [1.4K]

Answer:

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6 0
2 years ago
Read 2 more answers
How many molecules are present in 265 moles of CCl
Solnce55 [7]

Answer:

Option C. 1.60x10^26 molecules

Explanation:

Avogadro's hypothesis proved that that 1 mole of any substance contains 6.02x10^23 molecules.

From the above, we understood that 1 mole of CCl4 contains 6.02x10^23 molecules.

If 1 mole of CCl4 contains 6.02x10^23 molecules,

then, 265 moles of CCl4 will contain = 265 x 6.02x10^23 = 1.60x10^26 molecules

From the calculation made above, 265 moles of CCl4 contains 1.60x10^26 molecules.

5 0
3 years ago
PLEASE HELP!!!!!
sergeinik [125]
It gains 2 electrons from a metal
7 0
2 years ago
How many atoms of hydrogen (h) are present in 200 molecules of ammonia (nh3)? express your answer numerically?
natita [175]
<span>Chemical formula of ammonia = NH3 As we can see there are three atoms of hydrogen in one molecule of ammonia. So in the 200 molecule of ammonia there will be = 200*3 = 600 atoms of hydrogen. Answer - 600 atoms of hydrogen.</span>
6 0
3 years ago
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