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3 years ago

What's the amount of solute in 1.75 L of 0.25 M HCl?

Chemistry

1 answer:

Fynjy0 [20]3 years ago

5 0

Answer: 0.4375 mols of solute

Explanation:

The problem is asking for the amount of solute. We are given the value of molarity. The molarity is 0.25M. We know that molarity is $M=\frac{mols of solute}{liters of solution}$ . Since we are given the liters of solution is 1.75, we can use those values to solve for mols of solute.

$0.25M=\frac{x}{1.75L}$ [multiply both sides by 1.75 L]

$x=0.4375 mols$

There are 0.4375 mols of solute.

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Round each number to four significant figures

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Answer:

84,791 » 8479

256.75 » 256.8

431,801 » 4318

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Explanation:

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3 years ago

Determine how many atoms of pure silver will be created when 19.83 x 1023 atoms of copper are used in the following reaction:

Lubov Fominskaja [6]

Answer:

$\boxed{3.966 \times 10^{24}\text{ atoms of Ag}}$

Explanation:

(a) Balanced equation

Cu + 2AgNO₃ ⟶ Cu(NO₃)₂+ 2Ag

(b) Calculation

You want to convert atoms of Cu to atoms of Ag.

The atomic ratio is ratio is 2 atoms Ag:1 atom Cu

$\text{Atoms of Ag} = 19.83 \times 10^{23}\text{atoms Cu} \times \dfrac{\text{2 atoms Ag}}{\text{1 atom Cu}}\\\\= 3.966 \times 10^{24}\text{ atoms of Ag}\\\\\text{The reaction will produce }\boxed{\mathbf{3.966 \times 10^{24}}\textbf{ atoms of Ag}}$

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3 years ago

Read 2 more answers

What's the Balanced equation for C5H11OH+O2

Galina-37 [17]

The balanced equation is 2 C5H11OH + 15 O2 = 10 CO2 + 12 H2O

8 0

4 years ago

In a reaction, 25 grams of reactant

Vsevolod [243]

Answer:

D. 15g

Explanation:

The law of conservation of mass states that, in a chemical reaction, mass can neither be created nor destroyed. This means that the amount of matter in the elements of the reactants must be equal to the amount in the resulting products.

In this question, 25 grams of a reactant AB, was broken down in a reaction to produce 10 grams of products A and X grams of product B. According to the law of conservation of mass, the mass of the reactant must be equal to the total mass of the products. This means that 25 grams must also be the total mass of both products in this reaction. Hence, if product A is 10 grams, product B will be 25 grams - 10 grams = 15 grams.

Therefore, product B must be 15 grams in order to form a total of 25 grams when added to the mass of product A. This will equate the mass of the reactant AB and fulfill the law of conservation of mass.

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3 years ago

Particals in the nucleus of an atom are its _________ and ____________.

Illusion [34]

That would be Protons and Neutrons.

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3 years ago