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4 years ago

When potassium chloride breaks down, potassium metal and chlorine gas are formed. What type of reaction is this?

Chemistry

1 answer:

Anni [7]4 years ago

6 0

Answer:

Chemical reaction

Explanation:

The physical form of potassium metal and chlorine gas are being formed, meaning there is an involvement of the rearrangement of the molecular or ionic structure.

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Calculate the mass of 0.0455 mol of Ni

Lera25 [3.4K]

Answer:

2.67g Ni

Explanation:

To convert from moles to mass, use molar mass as a conversion factor.

Nickel has a molar mass of 58.69g/mol.

0.0455mol ( $\frac{58.69g Ni}{1 mole Ni}$ ) = 2.67g Ni

8 0

3 years ago

Zn-64 = 48.63%

sladkih [1.3K]

Answer:

A = 65.46 u

Explanation:

Given that,

The composition of zinc is as follows :

Zn-64 = 48.63%

Zn-66 = 27.90%

Zn-67 = 4.10%

Zn-68 = 18.75%

Zn-70 = .62%

We need to find the average atomic mass of the given element. It can be solved as follows :

$A=\dfrac{48.63\times 64+27.90\times 66+4.1\times 67+18.75\times 68+0.62\times 70}{100}\\A=65.46\ u$

So, the average atomic mass of zinc is 65.46 u.

6 0

3 years ago

When fat comes in contact with sodium hydroxide, it produces soap and glycerin. Determine whether this is a physical change or a

Degger [83]

Answer: Chemical change

Explanation:

Physical change is a change where there is a change in size , shape etc and no new products are formed.

Chemical change is a change where there is a change in chemical composition as new products are formed.

Example: Formation of soap and glycerin from fat and sodium hydroxide is a chemical change as the chemical bonds are getting rearranged to form new products.

8 0

3 years ago

Which goal do all environmental regulations for industry serve?

ololo11 [35]

Answer:

To protect people and the environment.

Explanation:

4 0

3 years ago

Read 2 more answers

In what situations are van der waals forces the most significant

viktelen [127]