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Misha Larkins [42]
3 years ago
10

What does criteria mean???​

Chemistry
2 answers:
Varvara68 [4.7K]3 years ago
5 0
A standard of judgment or criticism; a rule or principle for evaluating or testing something.
Dictionary.com
motikmotik3 years ago
3 0

Answer:

A criteria is a required standard to be met.

Explanation:

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When writing the chemical formulas for a molecular compound, what method do you use?​
podryga [215]

Answer:

A molecular compound is usually composed of two or more nonmetal elements. Molecular compounds are named with the first element first and then the second element by using the stem of the element name plus the suffix -ide.

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Why do we have 2 high tides and 2 low tides a day?
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3 years ago
Aluminum metal reacts with bromine, a red-brown liquid with a noxious odor. The reaction is vigorous and produces aluminum bromi
GuDViN [60]

<u>Answer:</u> The mass of bromine reacted is 160.6 grams.

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}        .....(1)

Given mass of aluminium = 18.1 g

Molar mass of aluminium = 27 g/mol

Putting values in equation 1, we get:

\text{Moles of aluminium}=\frac{18.1g}{27g/mol}=0.670mol

The chemical equation for the reaction of aluminium and bromide follows:

2Al+3Br_2\rightarrow 2AlBr_3

By Stoichiometry of the reaction:

2 moles of aluminium reacts with 3 moles of bromine gas

So, 0.670 moles of aluminium will react with = \frac{3}{2}\times 0.670=1.005mol of bromine gas.

Now, calculating the mass of bromine gas, we use equation 1:

Moles of bromine gas = 1.005 moles

Molar mass of bromine gas = 159.81 g/mol

Putting values in equation 1, we get:

1.005mol=\frac{\text{Mass of bromine}}{159.81g/mol}\\\\\text{Mass of bromine}=(1.005mol\times 159.81g/mol)=160.6g

Hence, the mass of bromine reacted is 160.6 grams.

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3 years ago
What type of reactions release energy into the environment?​
Tema [17]

Answer:Exothermic and endothermic reactions (ESBQM)

Explanation:

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Which of the following describes what happens in a chemical reaction
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Is there meant to be a photo here? there are no options so we can’t answer the question.
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