3 years ago

Im stuck pls help me!!

Chemistry

1 answer:

Ratling [72]3 years ago

3 0

Answer:

I would say the amount of sunlight, nutrients and the amount of time the weeds are pulled

Explanation:

That’s what l believe it is.

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Mrs. Hillis runs 5.6 miles every evening. How far does she run in feet? (5,280 ft = 1<br> mile)

Likurg_2 [28]

Answer:

29565 feet

Explanation:

multiply 5.6 by 5280

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3 years ago

If 27.9 grams of calcium carbonate reacts with excess HCl, how many moles of calcium chloride are produced

Virty [35]

Answer:

$\large \boxed{\text{0.2797 mol}}$

Explanation:

We must do the conversions:

mass of CaCO₃ ⟶ moles of CaCO₃ ⟶ moles of CaCl₂

We will need a chemical equation with masses and molar masses, so, let's gather all the information in one place.

Mᵣ: 100.09 110.98

CaCO₃ + 2HCl ⟶ CaCl₂ + CO₂ + 2HCl

m/g: 27.9

(a) Moles of CaCO₃ $\text{Moles of CaCO}_{3} = \text{27.9 g CaCO}_{3}\times \dfrac{\text{1 mol CaCO}_{3}}{\text{100.09 g CaCO}_{3}}= \text{0.2787 mol CaCO}_{3}$

(b) Moles of CaCl₂ $\text{Moles of CaCl}_{2} =\text{0.2787 mol CaCO}_{3} \times \dfrac{\text{1mol CaCl}_{2}}{\text{1 mol CaCO}_{3}} = \text{0.279 mol CaCl}_{2}$ $\text{The reaction produces $\large \boxed{\textbf{0.279 mol}}$ of CaCl}_{2}$