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serious [3.7K]
3 years ago
14

What mass of calcium carbonate (in grams) can be dissolved by 4.0 g of hcl? (hint: begin by writing a balanced equation for the

reaction between hydrochloric acid and calcium carbonate.)?
Chemistry
2 answers:
stiks02 [169]3 years ago
8 0
The reaction between calcium carbonate and hydrochloric acid can be expressed through the chemical reaction,

    CaCO3 + 2HCl --> CaCl2 + H2O + CO2

The molecular weight of calcium carbonate is 100 g/mol while that of hydrochloric acid is 36.45. The equation above depicts that 100 g of calcium carbonate can be dissolved in 72.9 g of hydrochloric acid. 

    x = (4 g HCl)(100 g CaCO3 / 72.9 HCl)
      x = 5.49 g

Answer: 5.49 g
Paha777 [63]3 years ago
3 0

Answer:

4 grams of HCl need 5.486 grams of CaCO3

Explanation:

The balanced chemical reaction between hydrocloric acid and calcium carbonate can be expressed as

CaCO3+ 2HCl -> CaCl2 + CO2 + H2O

This means that 1 mole of CaCO3 reacts with 2 mole of HCl to produce 1 mole of CaCl2,CO2 and H2O.

2 mole of HCl needs 2 mole of CaCO3  

In term of mass we can write that

72.9 grams of HCl need 100 grams of CaCO3

1 grams of HCl need (100/72.9) grams of CaCO3

4 grams of HCl need ((100*4)/72.9) grams of CaCO3

4 grams of HCl need 5.486 grams of CaCO3

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elena55 [62]

Answer:

λ = 1*10⁻¹⁰m

Explanation:

Frequency (f) = 3.0*10¹²MHz = 3.0*10¹⁸Hz

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Speed (v) of a wave = frequency (f) * wavelength (λ)

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Solve for λ,

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λ = 3.0*10⁸ / 3.0*10¹⁸

λ = 1*10⁻¹⁰m

λ = 0.

6 0
3 years ago
You unknowingly run over a small nail while driving and it punctures your tire. When you are getting in your car the next mornin
Norma-Jean [14]

The nails can puncture the tires of the vehicles making them deflated after a while. The process of tire deflation due to a puncture is due to the process called an effusion. Thus, option c is correct.

<h3>What is effusion?</h3>

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When a tire is punctured then the gas from the tire starts to move out through the hole through effusion. This leads to deflation of the tire after some time as all the gas present inside had moved out completely.

Therefore, option c. a punctured tire deflates due to effusion.

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notka56 [123]
Co2 is correct buddy
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Balance the equation Mg(s) + O2(g) -&gt; MgO(s)​
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Answer:

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Last one is the correct answer

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