CHEMISTRY HIGH SCHOOL

What is the mass percentage of carbon in 5.000 G of sucrose

Answers

Answer 1

Answer:

Answer : The mass percentage of carbon in sucrose is, 42.1 %

Explanation: Given,

Molar mass of C = 12 g/mole

Molar mass of H = 1 g/mole

Molar mass of O = 16 g/mole

First we have to calculate the molar mass of sucrose.

Molar mass of sucrose $(C_(12)H_(22)O_(11))$ = $12(12)+22(1)+11(16)=342g/mole$

Now we have to calculate the mass of carbon in 5 g of sucrose.

As we now that there are 12 number of carbon atoms, 22 number of hydrogen atoms and 11 number of oxygen atoms.

The mass of carbon = $12* 12=144g$

As, 342 g of sucrose contains 144 g of carbon

So, 5 g of sucrose contains $(5)/(342)* 144=2.105g$ of carbon

Now we have to calculate the mass percentage of carbon in sucrose.

Formula used :

$\%\text{ Mass percentage of carbon}=\frac{\text{Mass of carbon}}{\text{Mass of sucrose}}* 100$

Now put all the given values in this formula, we get:

$\%\text{ Mass percentage of carbon}=(2.105)/(5)* 100=42.1\%$

Therefore, the mass percentage of carbon in sucrose is, 42.1 %

Answer 2

Answer: 17) 8.4 / 20 x 100

18) 20 . 0.5150

19) 6,50% because (as you said) the law of definite proportions states that regardless of the amount, a compound is always composed of the same elements in the same proportion by mass

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7. You found that 1.50 ml of a liquid has mass of 2.750g. What is the density of the unknown liquid?

Answers

To find density, you just divide the mass by the volume (density is the measurement of the amount of mass in a certain volume):

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Hemoglobin is a substance which allows the red blood cells to carry .oxygen,carbonmonoxide,nitrogen,water

Answers

It allows your blood to carry oxygen. #TeamAlvaxic

oxygen is the answer

Which answer best describes the potential energy diagram for a reaction that takes place in water, if the temperature of the surrounding water is lowered? a. the potential energy of the reactants is low; the potential energy increases gradually; it peaks, then decreases slightly.

b.the potential energy of the reactants is high; the potential energy decreases gradually; then increases slightly.

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Answers

Answer:

d. the potential energy of the reactants is low; the potential energy decreases gradually; then increases slightly.

Explanation:

Potential energy is the term that refers to the energy stored in a body, which can be used for several different things, even if transformed into other types of energy, depending on the need that that body presents at the moment. If the body needs to move, for example, the potential energy is transformed into kinetic energy. If the body needs to heat up or cool down, the potential energy turns into thermal energy.

Based on this, we can conclude what happens to the potential energy of a reaction that occurs in water, when the temperature of the surrounding water is reduced. If the temperature is reduced, it means that the water is losing energy and the potential energy of the reagents is low; as a result, the potential energy gradually decreases; then it increases a little.

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The half-life of thorium-227 is 18.72 days. How many days are required for three-fourths of a given amount to decay?I'm not quite sure how to set it up to even start working it? help would be appreciated! Thanks!!

Answers

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Answers

Answer: The correct answer is alpha particle.

Explanation:

There are 3 radioactive particles which are released in radioactive decay process:

1. Alpha particle: This particle is released when a nuclei undergoes alpha decay. The particle released has a mass of 4 units and has a charge of 2 units. The particle is positively charged.

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2. Beta-particle: This particle is released when a nuclei undergoes beta decay process. The particle released has a mass of 0 units and has a charge of (-1) units.

$_Z^A\textrm{X}\rightarrow _(Z+1)^A\textrm{Y}+_(-1)^0\beta$

3. Gamma radiations: These radiations are released when an unstable nuclei undergoes gamma ray emission and gives excess energy by a spontaneous electromagnetic process. The radiations does not carry any charge and has no mass.

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it is the alpha particle

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Answers

Answer:

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Explanation:

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