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4 years ago

The particles that make up matter do not change during a ?

Chemistry

2 answers:

Bogdan [553]4 years ago

8 0

Matter can only me transformed, but not created or destroyed.

S_A_V [24]4 years ago

6 0

Matter can't be destroyed nor created but only transferred.

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Would it be easier to crystallize polytetrafluoroethylene (teflon) (C2F4) or polystyrene (CsHs)? Why?

katrin2010 [14]

Answer:

Crystallization of tetrafloroethane C₂F₄ is easier than styrene C₈H₈ .

Explanation:

Crystallization -

crystallization is a process in which atoms are restructured in the form of crystals , some of the ways by which crystals form are melting , precipitating from a solution.

we need to consider the melting point of the given compounds ,

the melting point of styrene C₈H₈ is -30 °C

whereas the melting point of tetrafloroethane C₂F₄ is -140 °C ( 130.7 K ) since the melting point of C₂F₄ is less than C₈H₈ so it is easy to melt C₂F₄.

Hence it is easier to crystallize C₂F₄ .

3 0

3 years ago

How many atoms are in 313.5 L of Bromine (Br) gas

pochemuha

Answer:

The answer to the question is 79.91

4 0

3 years ago

Read 2 more answers

What is the change in the enthalpy of 120 g/s acid heated in a double pipe heat exchanger from 25°C to 100°C, if the average hea

telo118 [61]

Answer:

ojopjd

Explanation:

3 0

4 years ago

Regular treatment with low dose aspirin is used to help prevent cardiovascular disease. How many aspirin molecules are in

gogolik [260]

The number of molecules of aspirin is $4.01\times 10^{20} molecules$

Given:

120. mg of the aspirin

To find:

The molecules of aspirin in 120. mg of aspirin.

Solution

Mass of aspirin = 120. mg

$1mg = 0.001 g\\\\120. mg=120.\times 0.001 g=0.120 g$

Molar mass of aspirin = 180.158 g/mol

Moles of aspirin = $= \frac{0.120 g}{180.158 g/mol}=0.000666 mol$

According to the mole concept:

$1 mole = N_A=6.022\times 10^{23} atoms/molecule/ions$

The molecules of aspirin in 0.000666 moles of aspirin:

$=0.000666\times 6.022\times 10^{23} molecules\\\\=4.01\times 10^{20} molecules$

The number of molecules of aspirin is $4.01\times 10^{20} molecules$ .

Learn more about the mole concept here:

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brainly.com/question/2293005?referrer=searchResults

8 0

2 years ago

5. A hollow glass sphere has a volume of 350 mL and

Rina8888 [55]

Explanation:

Given that,

Volume of a hallow glass sphere is 350 mL

Specific gravity is 1.252

We need to find the weight of the sphere. The ratio of density of substance to the density of water is called specific gravity.

The density of water is 1 g/mL

$\text{specific gravity}=\dfrac{\text{density of substance}}{\text{density of water}}\\\\SG=\dfrac{m}{V\times \rho_w}\\\\m=SG\times V\times \rho_w\\\\m=1.252\times 350\ mL\times 1\ g/mL\\\\m=438.2\ \text{grams}$

We know that,

1 pound = 453.592 grams

So,

m = 0.97 lbs

So, the weight of the sphere is 0.97 lbs or 0.97 pounds.

5 0

4 years ago