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OLga [1]
3 years ago
15

Can matter be created or destroyed? Yes or No

Chemistry
2 answers:
Stells [14]3 years ago
6 0

Answer:

none is created or destroyed. This concept is called the Law of Conservation of Mass.

anzhelika [568]3 years ago
5 0

Answer:

No

Explanation:

The same amount of matter is present before and after chemical and physical changes. Matter cannot be created or destroyed

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Chemists use the mole as the unit for the amount of substance. One mole is equal to 6.02 x 10^23 (just like one dozen is equal t
Karo-lina-s [1.5K]

Answer:

atoms=6.0x10^{25}atoms

Explanation:

Hello!

In this case, since we are given 4 kg of a calcium-containing sample, in order to compute the atoms there first need to compute the mass in grams:

m=4kg*\frac{1000g}{1kg} =4000g

Next, via the molar mass and the Avogadro's number, we can compute the atoms as follows:

atoms=4000g*\frac{1mol}{40.1g}*\frac{6.02x10^{23}atoms}{1mol}\\\\atoms=6.0x10^{25}atoms

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7 0
3 years ago
CAN SOMEONE HELP PLEASE!!!!
miv72 [106K]

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8 0
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Anton [14]
It’s the third diagram. Gases are by far the least dense of the three main states of matter. Liquids and solids are of comparable density. Liquids assume the shape of their containers, and solids have a definite shape. You can describe the particles of each state on the nanoscale to contribute more. Particles of a solid mostly vibrate in place and are rigidly locked together. Particles of a liquid flow past each other more, but are still tightly packed. Particles of a gas seldom even collide and have minimal attractions to each other. You can expand on this by discussing the kinetic energy of each particle. Gases are the most energetic. Liquids second most. Solids least.
7 0
4 years ago
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The possible products of a double displacement reaction in aqueous solution are SrS4, and NaCl. Which of these possible products
Maru [420]

Answer:

A. SrSO4

Explanation:

it is insoluble in water therefore it is the precipitate formed in the reaction

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