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IceJOKER [234]
3 years ago
5

1. Why are many different tools needed for space exploration

Chemistry
1 answer:
Arisa [49]3 years ago
3 0

Answer: because each tool is designed for a certain thing

Explanation:

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A measure of how much mass there is in a volume of a substance is
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The answer is matter because that is the answer

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What is the mass of 3.75 moles of potassium (K)?
densk [106]
Use stoichiometry 3.75moles k* 39.10g k\1 mole k= 146.63g k
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3 years ago
Some people think hydropower should be used to supply ali of the electricity for the United States. Which of the following state
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C. Hydropower would need dams to be built, and this will prevent fishes from going upstream.
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3 years ago
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A sample of the chiral molecule limonene is 79% enantiopure. what percentage of each enantiomer is present? what is the percent
Degger [83]

Answer :  The % of (+) limonene isomer = 79%


                The % of (-) limonene isomer = 0%


                The % of enantiomeric excess = 58%


Explanation :   Enantiomeric excess (ee) is the measurement of purity used for chiral substances.


Given,


% of pure limonene enantiomer = The % of (+) limonene isomer = 79%


Therefore, The % of (-) limonene isomer = 0%


Formula used :  

\%(+)\text{ isomer}=\frac{ee}{2}+50\%


Where,         ee → enantiomeric excess


Now, put all the values in above formula, we get the value of enantiomeric excess (ee).


     {ee}=\frac{\%(+)-50\%}{2}


            =\frac{79\%-50\%}{2}


              = 58%



7 0
3 years ago
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Mrs. Marlow's class is conducting an investigation of a mixture of sand, iron filings, and salt. They were told that they must s
aliina [53]

A mixture can be separated by looking at the physical properties of the components of the mixture.

Since salt is soluble in water, it can be added to the mixture to dissolve the salt.

The bar magnet is now introduced in order to remove the iron filings since they are attracted by a magnet.

The solution is filtered to separate the sand from the salt solution.

Lastly, the salt solution is heated to dryness to drive away the water and obtain the solid salt.

Hence the mixture has been separated into its components using their individual physical properties. Option A is the correct answer.

Learn more: brainly.com/question/12160179

8 0
3 years ago
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