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MArishka [77]
3 years ago
11

Dose anyone know what the independent, dependent variables would be. Also didn't know what category to put this in.​

Chemistry
1 answer:
vredina [299]3 years ago
7 0

Answer:

umm use a calculator ok bye

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Concentrations expressed as a percent by mass are useful when the solute is a _____.
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Mr. Holmes is busy making a paper mache volcano that he is sure is going to win the national science fair contest. He only has r
AnnyKZ [126]

Answer:

Bottle 2 shows the vinegar has a molarity of 2M acetic acid

Explanation:

2M of acetic acid has higher concentration of acetic acid as compared to other vinegar. In 2M of acetic acid is equals to 120 gram of acetic acid in 500 ml of water which is quiet higher than other concentration of acetic acid in vinegar which is 4%. So Mr. Holmes has to use 2M of acetic acid which will produced high intense eruption in the volcano and win the national science fair contest.

7 0
3 years ago
Copper is commonly mined as an ore with a variable percent composition of copper (II) sulfide. This ore is also sometimes referr
pantera1 [17]

Answer:

m_{CuO}=93.6gCuO

Explanation:

Hello,

In this case, the undergoing chemical reaction is:

CuS+\frac{3}{2} O_2\rightarrow CuO+SO_2

Thus, given the 1.00-kg of 12.5% ore, we can compute the theoretical yield of copper (II) oxide via stoichiometry:

m_{CuO}^{theoretical}=1.00kgCuS*\frac{1000gCuS}{1kgCuS} *\frac{12.5gCuS}{100gCuS} *\frac{1molCuS}{95.6gCuS} *\frac{1molCuO}{1molCuS} *\frac{79.5gCuO}{1molCuO} \\\\m_{CuO}^{theoretical}=103.95gCuO

Whereas the third factor accounts for the percent purity of the covellite. Then, given the percent yield, we can compute the actual yield by:

m_{CuO}=103.95gCuO*0.9\\\\m_{CuO}=93.6gCuO

Regards.

6 0
3 years ago
Can you guys help me answer question 5 on homogeneous mixture tysm
hjlf

Answer:

Hope this helped :) good luck! ❤️

Explanation:

A <em>coolant solution</em> is a <u><em>homogeneous </em></u>mixture because the coolant particles are not chemically combined with the water (keep their properties) and they are evenly distributed throughout the water.

7 0
3 years ago
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