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Elanso [62]
2 years ago
6

HELP ME, MARKED AS BRAINEST

Chemistry
1 answer:
ELEN [110]2 years ago
5 0

Answer:

The answer is B

Explanation:

2Na + 2H2O = 2NaOH + H2

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Which part of the body contains enzymes that break down protein? A. Skin B. Brain C. Stomach D. Teeth
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What would happen to the air pressure on Earth's surface if the density of Earth's atmosphere were to suddenly double?A. The air
Sladkaya [172]

Answer:

B. The air pressure would increase 2X

Explanation:

Pressure = density × acceleration due to gravity × height

p = ρ × g × h

Pressure is force per unit area

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4 0
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

In next step we will calculate the number of moles of sodium chloride.

Number of moles = mass/molar mass

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

8 0
3 years ago
If you made 6 moles of NO2 How many grams of N2 did you use N2+2O2> 2NO2​
denis23 [38]

Answer: 1:2

Explanation:

Believe me its correct.

7 0
2 years ago
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