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1 year ago

1. 2. LEVEL1 A. In each group, choose the objects that has the property given in brackets

Chemistry

1 answer:

Leya [2.2K]1 year ago

5 0

Answer:

1. Diamond

2. The Image to the far right. It's rice I believe.

Explanation:

A lustrous material is a material that shine or usually reflect light. Fire isn't a material and the powder is dull and doesn't shine. In this case the diamond is a lustrous material and not a metal.

An edible substance is anything thing that can be consumed as food. Soap is consumable and the blue picture is definetly not either so we conclude that the rice is the edible option.

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3 Mg(+2) + 2 N(-3) = Mg3N2

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shusha [124]

Answer: The reaction order with respect to A is m

Explanation:

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Elementary reactions are defined as the reactions for which the order of the reaction is same as its molecularity and order with respect to each reactant is equal to its stoichiometric coefficient as represented in the balanced chemical reaction.

For the given reaction:

$aA+bB\rightleftharpoons cC+dD$

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2 years ago

If a 100. -g sample of a hydrated compound contains 37.07-g sodium, 48.39-g carbonate and 14.54-g water, find the empirical form

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he required empirical formula based on the data provided is Na2CO3.H2O.

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The term empirical formula refers to the formula of a compound which shows the ratio of each specie present.

We have the following;

Mass of sodium = 37.07-g

Mass of carbonate = 48.39 g

Mass of water = 14.54-g

Number of moles of sodium = 37.07-g/23 g/mol = 2 moles

Number of moles of carbonate = 48.39 g/61 g/mol = 1 mole

Number of moles of water = 14.54/18 g/mol = 1 mole

The mole ratio is 2 : 1: 1

Hence, the required empirical formula is Na2CO3.H2O

Learn more about empirical formula : brainly.com/question/11588623

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