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4 years ago

WILL MARK BRAINLIEST!!!!!!

Chemistry

1 answer:

balu736 [363]4 years ago

6 0

Answer:

the last one

Explanation:

when energy slows down/ losing energy it would solidify I think dont take my word

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What elements are made from the body

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Answer:

hydrogen oxygen carbon and nitrogen

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3 years ago

Which statement describes the particles of an ideal gas?

avanturin [10]

The answer is (4) the volume of the particles is negligible. The property of an ideal gas is that the volume of particles and forces of attraction between the particles are negligible.

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3 years ago

2NaOH+CO2----->Na2CO3+H2O

kondaur [170]

Answer:

13.2 g Na2CO3

Explanation:

Convert 10.0 g NaOH to mol.

10.0 g x 1 mol/39.997 g = 0.250 mol

Use mol ration given by the equation: 2 mol NaOH to 1 mol Na2CO3

0.250 mol NaOH x 1 mol Na2CO3/2 mol NaOH = 0.125 mol Na2CO3

Finally, convert the moles of Na2CO3 to grams.

0.125 mol Na2CO3 x 105.99 g/1 mol = 13.2 g

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4 years ago

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3 years ago

Read 2 more answers

1. write the complete chemical symbol for the ion with 14 protons 15 neutrons and 18 electrons

motikmotik

Answer:

1. $Si^{-4}$

2. $Co^{+2}$

Explanation:

An ion is formed when an atom that is said to be neutral gains or losses electrons.

It is thought that a negative ion (anion) is produced as it gains electrons and a positive ion (cation) is formed when it loses an electron.

Atomic number is the total number of protons and electrons in a neutral atom.

From the information

Protons = 14

electron = 18

Net Charge = no of proton - no of electron

= 14 - 18 = -4

Mass number = 14 + 15 = 29

Thus, the chemical symbol = $Si^{-4}$

For ion with 27 proton, 32 neutrons and 25 electrons

Net charge = 27 - 25 = +2

Mass number = 27 + 32 = 59

Thus, the chemical symbol = $Co^{+2}$

6 0

3 years ago