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4 years ago

When balancing an equation, should you adjust the subscripts or the coefficients?

Chemistry

2 answers:

ikadub [295]4 years ago

5 0

Answer:

The coefficients.

Explanation:

If you change the subscripts you are changing the chemical formulae.

dimulka [17.4K]4 years ago

3 0

Coefficients, you can’t change the subscripts but you can balance the equation by adding coefficients to both sides

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Which metal ions can be precipitated out of solution as chlorides?a. Ag+, Hg2+, Co2+b. Cu2+, Cd2+, Bi3+ c. Ag+, Hg22+, Pb2+ d. N

Fudgin [204]

Answer:

Explanation:

In the qualitative analysis of metal salts , we see that in group I , metal chlorides are precipitated out . It is so because their metal chlorides are insoluble in water .

In this group following metal ions are present

Ag+,

Hg₂²⁺

Pb²⁺

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3 years ago

In the following reaction, how many moles of H2O are created when 7 moles of oxygen are consumed?

notka56 [123]

Answer:

Explanation:

You can see in the chemical equation that 7 $O_{2}$ are used up to produce 6 $H_{2}O$

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4 years ago

Alanna spots a bird in her back yard. The bird is sitting on a tree. Explain how the outer coverings of the bird and tree are di

AfilCa [17]

Answer:

A bird's feathers are supposed to keep the bird warm and help them fly. A tree's bark is supposed to protect the inside of the tree.

Explanation:

If a tree has no bark, the inside of it is exposed. If a bird has no feathers, the bird is cold and cant fly.

8 0

3 years ago

Read 2 more answers

Do metals dissolve in water

Nady [450]

yes

include sodium and potassium, dissolve instantly and dramatically in plain water — no stronger acid is needed. The metals react violently with water, releasing and igniting hydrogen gas and causing an explosion.

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3 years ago

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Archeologist discovered a silver crown in an ancient tomb and sent it for analysis. You placed the crown in a tub of water and f

gulaghasi [49]

Answer:

Explanation:

The density of pure lead is 10.49g/cm³

Given parameters:

Volume of water displaced by the crown = 238.1ml

Mass of crown = 2.50kg

Solution

We would simply find the density of the discovered crown and compare with that of the standardized density of lead.

Density is an intensive property of matter and it is the same for any form of matter. It is amount of substance per unit volume:

Density = $\frac{mass}{volume}$

We need to convert the given parameters to standard unit,

1ml = 1cm³

Therefore, the volume of water displaced is 238.1cm³

Also,

1kg = 1000g

2.5kg = 2500g

mass of the crown is 2500g

Density = $\frac{2500}{238.1}$ = 10.49g/cm³

The crown is made of silver because the density matches with that of pure silver.

8 0

3 years ago