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3 years ago

6

Polymerization is the process of linking smaller molecules to form long chains of higher molecular weight. True or False

2 answers:

quester [9]3 years ago

6 0

True is correct answer.

Polymerization is the process of linking it has a smaller molecules to form has a long chains of higher molecular weight.

Hope it helped you.

-Charlie

laiz [17]3 years ago

6 0

Answer:

True

Explanation:

Polymer is made up of monomers. Monomers are the building block of polymers.

For example, formation of polyethylene from ethylene

H₂C=CH₂ + H₂C=CH₂ → - CH₂-CH₂-CH₂-CH₂-

Ethylene molecules add to one another through addition reaction.

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Each student in a class placed a 2.00 g sample of a mixture of Cu and Al in a beaker and placed the beaker in a fume hood. The s

Aleks [24]

Answer:

Percentage mass of copper in the sample = 32%

Explanation:

Equation of the reaction producing Cu(NO₃) is given below:

Cu(s)+ 4HNO₃(aq) ---> Cu(NO₃)(aq) + 2NO₂(g) + 2H₂O(l)

From the equation of reaction, 1 mole of Cu(NO₃) is produced from 1 mole of copper. Therefore, 0.010 moles of Cu(NO₃) will be produced from 0.010 mole of copper.

Molar mass of copper = 64 g/mol

mass of copper = number of moles * molar mass

mass of copper = 0.01 mol * 64 g/mol = 0.64 g

Percentage by mass of copper in the 2.00 g sample = (0.64/2.00) * 100%

Percentage mass of copper in the sample = 32%

3 0

3 years ago

Molar mass of c16h19n305s

Masja [62]

Answer:

365.212

Explanation:

According to the given situation, the calculation of molar mass is shown below:-

Data provided

$c_{16}\ h_{19}\ n_3\ o_5\ S$

Molar mass = 16 × 12 + 19 × 1.008 + 3 × 14 + 5 × 16 + 32.06

= 192 + 19.152 + 42 + 80 + 32.06

Molar mass = 365.212

Therefore for determining the molar mass we simply solve the above equation.

So, the correct answer is 365.212

5 0

3 years ago

A 0.533 g sample of a carbonate salt is added to a flask. The only thing you know is that per formula unit, there is only one ca

dimulka [17.4K]

Answer:

$\mathbf{CrCO_3}$

Explanation:

The total mole of $H_2SO_4$ added = 15 × 1 × 10⁻³

= 15 × 10⁻³ mole

= 15 mmoles

the number of moles of NaOH added in order to neutralize the excess acid = 0.5905 × 29.393 = 17.36 mmoles

the equation for the reaction is:

2NaOH + $H_2SO_4$ --------> $Na_2SO_4 +2H_2O$

i.e

2 moles of NaOH react with $H_2SO_4$

1 moles of NaOH will react with 1/2 $H_2SO_4$

17.36 mmoles of NaOH = 1/2 × 17.36 mmoles of $H_2SO_4$

= 8.68 mmoles

Number of moles of $H_2SO_4$ that react with MCO₃ = Total moles of $H_2SO_4$ added - moles of $H_2SO_4$ reacted with NaOH

= (15 - 8.68) mmoles

= 6.32 mmoles

$H_2SO_4$ + $MCO_3$ ------> $M_2SO_4$ + $H_2O$ + $CO_2$

1 mole of $H_2SO_4$ react with 1 mole of $MCO_3$

6.32 mmoles of $H_2SO_4$ = 6.32 mmoles of $MCO_3$

number of moles of $MCO_3$ = 6.32 10⁻³ moles

mass of $MCO_3$ (carbonate salt) = 0.533 g

molar mass of $MCO_3$ = (M+60)g/mol

We all know that ;

number of moles = mass/molar mass

Then:

6.32 10⁻³ = 0.533 / (M+60)

(M+60) = 0.533/ 6.32 10⁻³

M + 60 = 84.34

M = 84.34 - 60

M = 24.34

Thus the element with the atomic mass of 24.34 is Chromium

The chemical formula for the compound is : $\mathbf{CrCO_3}$

6 0

3 years ago

(2.6 x 10^6) / (2.0 x 10^8)

laila [671]

Answer:

0.013

Explanation:

7 0

3 years ago

A gas of certain mass occupies a volume of 650cubic centimeterunder a pressure of 750mm Hg.calculate the pressure under which th

lapo4ka [179]

Answer: 833.3mmHg

Explanation:Please see attachment for explanation

3 0

3 years ago