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Harlamova29_29 [7]
2 years ago
10

All atoms of an element have the same number of ________. electrons neutrons protons protons plus neutrons

Chemistry
1 answer:
Cloud [144]2 years ago
6 0

Answer:

protons

Explanation:

An element, by definition, always has the same number of protons.  Sodium, element 11, has 11 protons.  Anything with 11 protons is a sodium atom, regardless of the number of neutrons, electrons, or politicians.  

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A 5.0 L sample of gas is collected at 400. mmHg at 727 C. What is the volume if the temperature were cooled to 77 C and the pres
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Answer:

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2 years ago
C
Schach [20]

Answer:

2.74 M

Explanation:

Given data:

Mass of sodium chloride = 80.0 g

Volume of water = 500.0 mL

Molarity of solution = ?

Solution:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles of solute / L of solution

Now we will convert the mL into L.

500.0 mL× 1 L /1000 mL =  0.5 L

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Number of moles = 80.0 g/ 58.4 g/mol

Number of moles = 1.37 mol

Molarity:

M =  1.37 mol/ 0.5 L

M =  2.74 M

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3 years ago
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Describe some acidic oxides that can be prepared by thermal decomposition of nitrates and carbonates
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It is also known as thermolysis.

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CaO→ Basic oxide.

CO2→ Acidic oxide.

6 0
2 years ago
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