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3 years ago

Pls help with these question because I don't understand what are pure substance and how to tell

Chemistry

2 answers:

Papessa [141]3 years ago

5 0

Answer:

i am pretty sure its A

Explanation:

they are etheir together like black and white or some sort of pattern if notice.

If they are like B,C,D like that they are mixtures which are NOT PURE SUBSTANCE'S.

Romashka [77]3 years ago

5 0

Answer:

option A is your answer.

Explanation:

Reason being is because that for the diagram if all of the little dots are connected another single dot then it is a pure but if one little dot isn't connected to another one then it isn't a pure substance.

Hope this helps!!!

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What is the chemical formula for the compound magnesium perchlorate? Use the list of polyatomic ions and the periodic table to h

8_murik_8 [283]

The chemical formula for the compound magnesium perchlorate is Mg(ClO₄)₂

Magnesium perchlorate or Mg(ClO₄)₂ is an ionic compound.

Perchlorate here is an anion which is represented by ClO₄⁻. Perchlorate is a polyatiomic anion, where one Cl atom is bonded to four O atoms.

The magnesium cation is represented by Mg²⁺

So one Mg²⁺ cation combines with two ClO₄⁻ anion to form one molecule of Mg(ClO₄)₂

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3 years ago

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3 years ago

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vovangra [49]

Explanation:

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3 years ago

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What is the formula for tin(ll) chromate

Nimfa-mama [501]

Answer:

SnCrO4

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4 years ago

How many grams are in 4.63 x 1024<br><br> molecules of CCl4?

MrRa [10]

Answer:

$m=1,182.8g$

Explanation:

Hello!

In this case, since the relationship between molecules and mass is first analyzed via the Avogadro's number to compute the moles in the given molecules:

$mol=4.63x10^{24}molec*\frac{1mol}{6.022x10^{23}molec}=7.69mol$

We now use the molar mass of carbon tetrachloride (153.81 g/mol) to obtain the required grams:

$m=7.69mol*\frac{153.81g}{1mol} \\\\m=1,182.8g$

Best regards!

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3 years ago

Pls help with these question because I don't understand what are pure substance and how to tell ​

Pls help with these question because I don't understand what are pure substance and how to tell