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3 years ago

Please answer this question

Chemistry

1 answer:

ZanzabumX [31]3 years ago

6 0

Answer:

Is the fixed number of water molecules present in one formula unit of a substance

Explanation:

When copper sulphate is heated in a china dish, the blue colomed crystal changes to a white powder due to the removal of molecules of water of crystallization

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The convex lens of a magnifying glass is used to focus sunlight, as shown. Which of the lettered parts of the lens diagram repre

vesna_86 [32]

This is just a guess, but I do believe it is B

5 0

3 years ago

The digit that would have to be estimated in reading this instrument would be the nearest:

wariber [46]

Answer:

The least count of vernier calipers is 0.01 g.

(B) is correct option.

Explanation:

Given that,

The digit that would have to be estimated in reading this instrument,

According to figure,

We need to calculate the pitch

Using formula of pitch

$pitch=\dfrac{distance\ moved}{Number\ of\ complete\ rotation}$

Put the value into the formula

$pitch=\dfrac{1}{10}$

$pitch=0.1\ g$

We need to calculate the least count of vernier calipers

Using formula of least count

$Least\ count=\dfrac{pitch}{number\ of\ vernier\ scale\ division}$

Put the value into the formula

$Least\ count=\dfrac{0.1}{10}$

$Least count = 0.01\ g$

Hence, The least count of vernier calipers is 0.01 g.

(B) is correct option.

4 0

3 years ago

Read 2 more answers

Which ionic compounds are not likely to dissolve in water?(More than 1 answer.)

olasank [31]

The answer is caso4 and ca(C2H3O2)2

7 0

3 years ago

This means that if there are 15.0 g of starting chemicals, also known as

Serggg [28]

Answer:

Reactants

Explanation:

"Starting chemicals", the substances present before a reaction occurs, are called reactants.

The results of the reaction are called products, which you would also have 15.0g.

4 0

3 years ago

Petroleum is a mixture of hydrocarbons. It is separated into useful fractions by fractional distillation.

Hunter-Best [27]

Explanation:

Fractional distillation is used to separate crude oil into simpler, more useful mixtures . This method can be used because different hydrocarbons have different boiling points

Hope this help u

3 0

3 years ago