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mestny [16]
3 years ago
9

Why is elemental zinc considered a pure substance?

Chemistry
1 answer:
Veseljchak [2.6K]3 years ago
7 0

Answer:  C... Because Zinc is made of only one type of atoms.

Explanation: All elements are made of one type of atom. Pure gold is made out of only gold atoms, silver out of only silver atoms, etc.

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What steps would you take in a lab to prepare 1000 mL of a 2 M NaCl solution
amm1812

Answer:

The answer to your question is below

Explanation:

Data

Volume = 1000 ml

Concentration = 2M

molecule = NaCl

Process

1.- Calculate the number of moles of NaCl

Molarity = moles/Volume

-Solve for volume

moles = Molarity x Volume (liters)

-Substitution

moles = 2 x 1

-Result

moles = 2

2.- Determine the molar mass of NaCl

NaCl = 23 + 35.5 = 58.5 g

3.- Calculate the mass of NaCl to prepare the solution

               58.5 g -----------------  1mol

                   x      -----------------  2 moles

                       x = (2 x 58.5) / 1

                       x = 117g

4.- Weight 117 g of NaCl, place them in a volumetric flask (1 l), and add enough water to prepare the solution.

7 0
4 years ago
Tameca is planning a hiking trip. The trail she would like to follow is 7.5 miles long. She plans to start her hike at 10:00 am.
V125BC [204]

Answer:

1.5 miles per hour

Explanation:

7.5 miles in 5 hours

7.5/5=1.5 miles per hour

6 0
3 years ago
According to the wave- mechanical model of the atom , an orbital is a region of the most probable location of ? ( please provide
notka56 [123]
An orbital is the most probable location of an electron. This is because you can't pinpoint the exact location of an electron because as soon as you do it will have moved again, so orbitals are used to find the probability of where a certain electron is.
7 0
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Can someone help me out real quick ASAP!!
marishachu [46]

Answer:

secondary consumer

The rabbits would be considered the primary consumer so that makes the coyote a secondary consumer.

7 0
3 years ago
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shepuryov [24]

nickel oxide is the chemical compound with a formula called NiO.

what are the elements in nickel oxide?

there is <span><span>a silver looking white crystalline metal that takes place in meteors also combined with other elements in ores.</span>
</span>

4 0
4 years ago
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