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Lisa [10]
3 years ago
9

Combine the words volume and meniscus in one sentence.

Chemistry
1 answer:
vagabundo [1.1K]3 years ago
8 0
To measure volume, measure the lowest part of the meniscus
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What are the five types of chemical reactions?
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Answer:

The five basic types of chemical reactions are combination, decomposition, single-replacement, double-replacement, and combustion. Analyzing the reactants and products of a given reaction will allow you to place it into one of these categories.

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HURRYYYYY!!!!<br> If you have 9 moles of chlorine gas, how many atoms of chlorine do you have?
Sergio039 [100]

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1.08×10^25

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3 0
4 years ago
Atomic weight of gold is 197.2 ami<br> Calculate no of gram atoms in 7.5g of gold
Salsk061 [2.6K]
The atomic weight is numerically equivalent to the molar mass.
therefore molar mass of gold is - 197.2 g/mol
avagadros number states that 1 mol of any substance is made of 6.022 x 10²³ units. These units could be atoms making up elements or molecules making up compounds. 
1 mol of gold is made of 6.022 x 10²³  atoms of gold
since 1 mol weighs 197.2 g 
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then 7.5 g contains - 6.022 x 10²³  x 7.5/ 197.2 = 2.29 x 10²² atoms of gold 
answer is 2.29 x 10²² atoms of gold
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Why do copper ions go to the negative electrode
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