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Marrrta [24]
3 years ago
9

Which is the least dense?

Chemistry
1 answer:
AVprozaik [17]3 years ago
6 0
1000 g of feathers is the least dense
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Explain why, when performing stoichiometric calculations, it is
pshichka [43]

Answer:

Stoichiometric Coefficients

The balanced equation makes it possible to convert information about one reactant or product to quantitative data about another element. Understanding this is essential to solving stoichiometric problems

Explanation:

3 0
2 years ago
What was the purpose of putting distilled water in the blank cuvette? if your unknown used ethanol as the base solvent, what wou
Margaret [11]

The purpose of using distilled water in the cuvette of the spectrophotometer is to calibrate the instrument. It is generally considered that distilled water shows zero absorbance and 100 % transmittance. So, to zero out the absorbance of compounds other than the analyte being determined, distilled water is used as a blank.

If the unknown being determined is prepared using ethanol as the base solution, the blank used must be ethanol. This is because absorbance if any from the solvent, ethanol must be zeroed out as when the measurement of the actual unknown is being made, the absorbance of the solvent does not interfere.

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3 years ago
A change in matter that produces one or more new substances is a ???
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Chemical reaction, generally speaking. It's a vague definition, but it's easy to remember.

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SCORPION-xisa [38]
I guess you could call them that. In chemistry, we call them Metalloids though.
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2 years ago
Calculate the relative formula/atomic mass of each of the following compounds:
zmey [24]
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2. FeS (Fe:56, S:32) ---> 56+32 = 88
3. Cl2 (Cl:35.5) ---> 35.5 x 2 = 71
4. CaC03 (Ca:40, C: 12, O: 16) ---> 40 + 12 + 3(16) = 100
5. Fe0 (Fe: 56, O: 16) ---> 56+16=72
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