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MrMuchimi
3 years ago
13

What do scientists predict about freshwater resources in the not-too-distant future ?

Chemistry
1 answer:
Galina-37 [17]3 years ago
5 0

Answer:

There will be a critical shortage. -In garden, water plants early in the morning or in the evening.

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The equation shows the reaction between zinc metal and hydrochloric acid.
kodGreya [7K]

Answer: 10 grams of Hydrogen gas will be produced theoretically.

Explanation: The equation for the reaction between zinc metal and hydrochloric acid is:

Zn(s)+2HCl(aq.)\rightarrow ZnCl_2(aq.)+H_2(g)

As HCl is present in excess, therefore limiting reagent is Zinc metal as it limits the formation of product.

By stoichiometry,

1 mole of Zinc metal produces 1 mole of Hydrogen gas, therefore

\text{5 moles of Zinc metal will produce}=\frac{1}{1}\times 5=5\text{ moles of Hydrogen gas}

Amount of Hydrogen gas produced can be calculated by:

\text{Mass of gas produced}=\text{Moles}\times \text{Molar mass}

Molar mass of Hydrogen = 2 g/mol

Mass of hydrogen gas produced = (5 moles )× (2 g/mol)

Mass of hydrogen gas produced = 10 grams

3 0
4 years ago
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Chemical analysis shows that citric acid contains 37.51% C, 4.20% H, and 58.29% O. What is the empirical formula for citric acid
Fiesta28 [93]

The empirical formula for the citric acid is C₆H₈O₇

<h3>Data obtained from the question </h3>
  • Carbon (C) = 37.51%
  • Hydrogen (H) = 4.20%
  • Oxygen (O) = 58.29%
  • Empirical formula =?

Divide by their molar mass

C = 37.51 / 12 = 3.126

H = 4.2 / 1 = 4.2

O = 58.29 / 16 = 3.643

Divide by the smallest

C = 3.126 / 3.126 = 1

H = 4.2 / 3.126 = 1.34

O = 3.643 / 3.126 = 1.17

Multiply through by 6 to express in whole number

C = 1 × 6 = 6

H = 1.34 × 6 = 8

O = 1.17 × 6 = 7

Thus, the empirical formula for the citric acid is C₆H₈O₇

Learn more about empirical formula:

brainly.com/question/24818135

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in one analysiss 1.09 x 10^13 molecules of ozone were found in 1.00ml of air how many ozone moles are these
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Answer:10,900,000,000,000 ozone moles

Explanation:

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Which reaction occurs at the anode in an electrochemical cell?
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An article about half-lives describes a parent isotope. What is a parent isotope?
Vikki [24]
A parent isotope plays an important role in the decay chain process. The parent isotope is the one who undergoes the decay process in the nuclear reaction in order to form its daughter isotope. The daughter isotope may decay on its own and may have its own daughter isotope as well.
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