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Advocard [28]
3 years ago
14

Which of the following practices below are used to help conserve soil?

Chemistry
1 answer:
nasty-shy [4]3 years ago
8 0

Answer:

B, C ,E those are the three practice in the options you have

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To test the purity of sodium bicarbonate, you dissolve a 3.50g sample in water and add sulfuric acid. if 1.04g of carbon dioxide
Andrews [41]

Answer is: the percent purity of the sodium bicarbonate is 56.83 %.

1. Chemical reaction: 2NaHCO₃ + H₂SO₄ → 2CO₂ + 2H₂O + Na₂SO₄.

2. m(NaHCO₃) = 3.50 g

n(NaHCO₃) = m(NaHCO₃) ÷ M(NaHCO₃).

n(NaHCO₃) = 3.50 g ÷ 84 g/mol.

n(NaHCO₃) = 0.042 mol.

3. From chemical reaction: n(NaHCO₃) : n(CO₂) = 1 : 1.

n(CO₂) = 0.042 mol.

m(CO₂) = 0.042 mol · 44 g/mol.

m(CO₂) = 1.83 g.

4. the percent purity = 1.04 g/1.83 g  ·100%.

the percent purity = 56.8 %.

8 0
3 years ago
A student dissolves 73 g of sodium nitrate, NaNO3, in 100 mL of water and observes a clear, colorless
ohaa [14]
I 90% sure that it would be supersaturated
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3 years ago
Explain how Earth is heated through radiation.
sergiy2304 [10]

With this temperature the Earth Radiation will be centered on a Wavelength!

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PLS HELP!! WILL MARK BRAINLIEST TO RIGHT ANSWER!!!
andre [41]

Answer:

1. A) Its very dense

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5. B) Attribute

Explanation:

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