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3 years ago

Polyhydroxyl alcohols are alcohols with more than one hydroxyl group attached to a carbon sequence. True or false?

1 answer:

3 0

Answer is: True.

Example for polyhydroxyl alcohol is glycerol.
Glycerol (1,2,3-Propanetriol, glycerine or glycerin) is a simple polyol (it has three hydroxyl group) compound with formula (OH-CH₂-CH(OH)-CH₂OH or C₃H₈O₃).
The glycerine backbone is found in all lipids known as triglycerides. (ester derived from glycerol and three fatty acids).
Glycerol is soluble in water and it is hygroscopic.

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Nonliving things have cells. True False

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The answer is false.

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Which of these is a TRUE statement? A) Sound travels through gases easier than liquids. B) Sound travels through solids easier t

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10. A 2.36-gram sample of NaHCO3 was completely decomposed in an

Airida [17]

Answer:

0.79 g

Explanation:

Let's introduce a strategy needed to solve any similar problem like this:

Apply the mass conservation law (assuming that this reaction goes 100 % to completion): the total mass of the reactants should be equal to the total mass of the products.

Based on the mass conservation law, we need to identify the reactants first. Our only reactant is sodium bicarbonate, so the total mass of the reactants is:

$m_r=m_{NaHCO_3}=2.36 g$

We have two products formed, sodium carbonate and carbonic acid. This implies that the total mass of the products is:

$m_p=m_{Na_2CO_3}+m_{H_2CO_3}$

Apply the law of mass conservation:

$m_r=m_p$

Substitute the given variables:

$m_{NaHCO_3}=m_{Na_2CO_3}+m_{H_2CO_3}$

Rearrange for the mass of carbonic acid:

$m_{H_2CO_3}=m_{NaHCO_3}-m_{Na_2CO_3}=2.36 g - 1.57 g=0.79 g$

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3 years ago

Converts 800kg into ng

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Answer:

yes

Explanation:

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2 years ago

PLEASE HELP ASAP

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Answer: Each ion, or atom, has a particular mass; similarly, each mole of a given pure substance also has a definite mass. The mass of one mole of atoms of a pure element in grams is equivalent to the atomic mass of that element in atomic mass units (amu) or in grams per mole (g/mol).

Explanation:

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