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3 years ago

HELP ME WILL MARK BRAINIEST

Chemistry

1 answer:

Natali [406]3 years ago

6 0

Fighting would make a conversation not possible because it stops the conversation from continuing and instead of talking it out like a normal conversation, it stops it from happening.

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If the valency of oxygen is 2, derive the valencies of the other elements present in the following oxides. Na2O, ZnO , Al2O3 , M

11Alexandr11 [23.1K]

Answer:

1)Na2O

let the valency of Na is x

2(x)+(2)=0

2x+2=0

2x=-2

x=-1

2)ZnO

let the valency of Zn is x

x+2=0

x=-2

3)Al2O3

let the valency of Al is x

2(x)+3(2)=0

2x+6=0

2x=-6

x=-3

4)MgO

let the valency of Mg is x

x+2=0

x=-2

7 0

3 years ago

Read 2 more answers

In a lab experiment, john uses a mesh to separate soil particles from water. Which technique of separation is he using

blondinia [14]

The Filtration techique

5 0

3 years ago

Please help!!!! Best answer will get brainliest.

Yuri [45]

Answer:

ionic

Explanation:

I don't know if this correct

3 0

3 years ago

Find the number of moles of the following substances 210 grams of NaHCO3

Triss [41]

The number of moles of 210 grams of NaHCO₃ is 2.5 moles.

<h3>How to find the Number of moles ? </h3>

To calculate the number of moles use the formula

Number of moles = $\frac{\text{Given Mass}}{\text{Molar Mass}}$

Mass of NaHCO₃ = 210 g

Now we have to find the Molar mass of NaHCO₃

= Atomic mass of Na + Atomic mass of H + Atomic mass of C + 3 (Atomic mass of O)

= 23 + 1 + 12 + 3 (16)

= 36 + 48

= 84 g/mol

Now put the value in above formula we get

Number of moles = $\frac{\text{Given Mass}}{\text{Molar Mass}}$

= $\frac{210\ g}{84\ g/mol}$

= 2.5 moles

Thus from the above conclusion we can say that The number of moles of 210 grams of NaHCO₃ is 2.5 moles.

Learn more about the Moles here: brainly.com/question/15356425

#SPJ1

8 0

2 years ago

What is calcium + chlorine when doing ionic bonds

vlabodo [156]

CaCl2
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6 0

3 years ago