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2 years ago

The metric prefix _____ means 1,000

Chemistry

1 answer:

n200080 [17]2 years ago

6 0

The metric prefix kilo means 1,000.

Example: A kilometer is equal to 1,000 meters.

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Copper is plated on zinc by immersing a piece of zinc into a solution containing copper(II) ions. In the plating reaction, coppe

Aloiza [94]

Hey there!:

Copper plating on Zinc will occur via this simple reaction:

Cu²⁺ + 2 e⁻ ⇌ Cu

When a species gains electron, it is reduced. Its oxidation state is decreased. For example, in the above reaction Cu2+ gained 2 electron to get reduced to Cu. Its oxidation state changed from +2 to 0. Hence it is a reduction reaction.

So, the correct answer is :

The copper II ions gain two electrons and are reduced.

Answer B

Hope this helps!

8 0

3 years ago

A chemist uses 4.0 l of sulfuric acid solution to produce 3.2 gram of product. how much of the same sulfuric acid solution is ne

matrenka [14]

4 l ------ 3,2 g
x l ------ 8 g

x = 8 g × 4 l / 3,2 g = 10 l

Answer: 10 l of sulfuric acid is needed to produce 8 g of product.

:-) ;-)

3 0

3 years ago

Read 2 more answers

What combines to form compounds? A. atoms of elements B. molecules C. minerals D. valences

hammer [34]

D would be correct (i did this Assessment today)

8 0

3 years ago

Read 2 more answers

Need help with 22 and 24

choli [55]

Answer:

22:

Formular:

$atomic \: mass = \frac{ \sum(isotopic \: mass \times \%abundance)}{100} \\$

substitute:

$atomic \: mass = \frac{(23.985 \times 78.70) + (24.986 \times 10.13) + (25.983 \times 11.17)}{100} \\ \\ = \frac{(1887.620) + (253.108) + (290.230)}{100} \\ \\ = \frac{2430.958}{100} \\ \\ { \boxed{ \boxed{average \: atomic \: mass = 24.3 \: amu}}}$

23:

Same element is represented by same number of protons. 

Answer:

6 protons. 6 protons

7 neutrons. 8 neutrons

6 electrons. 6 electrons

Note: Atoms with same proton number but different mass number are called isotopes

5 0

3 years ago

Read 2 more answers

The d-metals iron, copper, and manganese form cations with different oxidation states. For this reason, they are found in many o

choli [55]

Answer:

They have electrons in their 3d- and 4s-orbital for bond formation.

Explanation:

d- metals or transition metal are metal which form ion with partially filled d-orbital. Examples are iron and manganese.

The metals have 2 electrons in their 4s orbital. If only this is used for bonding, they will form compounds where they have oxidation State of +2 as seen in MnO.

If two 4s and one of 3d electrons are used, oxidation state of +3 is formed as seen in FeCl3.

If two 2s electron I used with two 3d electrons, compound with oxidation state of +4 is formed as seen in MnO2

4 0

3 years ago

Read 2 more answers