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3 years ago

The plastic which do not remould against on the heating are called ___..

Chemistry

1 answer:

andre [41]3 years ago

5 0

Answer:

Explanation:

Thermoseeting is termed to the plastic which caanot be remouled by heating, hence reausing them is not possible effeciently hence must be avoided to use in day to day applciations.

bakelite is an an examle

The reverse of the "thermosettin" are "thermoplastic" which can be remolded and are good for long time use.

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What scientific instrument is capable of measuring very small masses?

marusya05 [52]

Answer:

Electronic balances.

Explanation:

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3 years ago

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In the reaction Fe2O3 + 3CO a 2Fe + 3CO2, 10 moles of solid iron and 15 moles of carbon dioxide are produced from 5 moles of iro

Schach [20]

Answer:

Ratio is 3:2

3CO = 2Fe or 1.5 CO = 1 Fe

Explanation:

Fe2O3 + 3CO = 2Fe + 3CO2

Fe2O3 = Iron (|||) oxide

CO = Carbon monoxide

Fe = Solid Iron

CO2 = Carbon dioxide

Excellent is already balanced.

10 Moles Fe and 15 Moles of CO2

5 Moles Fe2O3 + 15 Moles 3CO = 10 Moles Fe + 15 Moles 3CO2

What is the ratio of carbon monoxide to solid iron

Ratio is 3:2 or 1.5 CO = 1 Fe

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3 years ago

How many moles are there in 8.94*10^24 atoms P?

IgorC [24]

Answer:

<h2>14.85 moles </h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = \frac{N}{L} \\$

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

$n = \frac{8.94 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 14.850498$

We have the final answer as

<h3>14.85 moles</h3>

Hope this helps you

7 0

3 years ago

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A certain compound contains 4.0 g of calcium and 7.1 g of chlorine. Its relative molecular mass is 111. Find its empirical and m

Phantasy [73]

Given :

A certain compound contains 4.0 g of calcium and 7.1 g of chlorine.

Its relative molecular mass is 111.

To Find :

Its empirical and molecular formulas.

Solution :

Moles of calcium , $n_1=\dfrac{4}{40}=0.1\ moles$ .

Moles of chlorine , $n_2=\dfrac{7.1}{35.45}=0.2\ moles$ .

The ratio calcium and chlorine is 1 : 2 .

So , the empirical formula is $CaCl_2$ .

Now , molecular mass of $CaCl_2$ is :

$M=40+(2\times 35.45)\\\\M=110.9\ g$

So , $n=\dfrac{111}{110.9} \approx1$

Therefore , the molecular formula is also $CaCl_2$ .

Hence , this is the required solution .

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3 years ago

What are half-reactions?

andreev551 [17]

Answer:

Explanation:

A Equations showing which elements are oxidized and which are

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3 years ago

The plastic which do not remould against on the heating are called ___..​

The plastic which do not remould against on the heating are called ___..