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Harman [31]
3 years ago
15

What explanation from the evidence within the chemical equation BEST supports the idea that matter is conserved in a chemical re

action? A There are the same number of atoms of oxygen and hydrogen in the reactants as there are in the products. B There are the same number of elements in the reactants as there are in the products. C More reactants, hydrogen and oxygen, were added to make the product, water. D Two reactants, hydrogen and oxygen, combined to make one product, water.
Chemistry
2 answers:
Olin [163]3 years ago
5 0

Answer:

A There are the same number of atoms of oxygen and hydrogen in the reactants as there are in the products.

Explanation:

Matter is conserved in a chemical equation if there are no loss of atoms. That means, total number of atoms of elements must be the same as the total number of element on the product side. The correct option is;

A. There are the same number of atoms of oxygen and hydrogen in the reactants as there are in the products.

Verdich [7]3 years ago
3 0

Answer:

its A. i just did dat

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(11) Indicate which of the following atomic models best fits the atomic model of
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Lauryl alcohol is a nonelectrolyte obtained from coconut oil and is used to make detergents. A solution of 6.80 g of lauryl alco
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Answer:

The approximate molar mass of lauryl alcohol is 174.08 g/m

Explanation:

An excersise to apply the colligative property of Freezing-point depression.

This is the formula: ΔT = Kf . m

First of all, think the T° of fusion of benzene → 5.5°C

ΔT = T° pure solvent - T° fusion solution

Kf for benzene: 5.12 °C/m

5.5°C - 4.5°C = 5.12 °C /m  . m

1°C /  5.12 m /°C = m

0.195 m = molality

This moles of lauryl alcohol, solute, are in 1 kg of benzene, solvent.

I have to find out in 0.2 kg.

1 kg sv ____ 0.195 moles solute

0.2 kg sv ____ (0.195 . 0.2)/1 = 0.039 moles solute

The mass for these moles is 6.80 g, so if I want to know the molar mass, I have to divide mass / moles

6.80 g/ 0.039 moles = 174.08 g/m

5 0
3 years ago
Potassium + water → potassium hydroxide<br> +<br> hydrogen<br> formula
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Answer:

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2 years ago
To classify a substance as an Arrhenius acid or base, or as a Brønsted-Lowry acid or base, you must consider how the substance b
aleksandr82 [10.1K]

Answer:

Ammonia is an Arrhenius base and a Brønsted-Lowry base.

Explanation:

An Arrhenius base is any substance which, when it is dissolved in an aqueous solution, produces hydroxide (OH^-), ions in solution. An aqueous solution is a solution that has water present in it.

A Bronsted-Lowry base is a substance that accepts a proton, that is, a hydrogen ion (H^+).

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4 0
3 years ago
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