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3 years ago

Sugar must undergo a chemical change before it can be broken down into

Chemistry

1 answer:

tresset_1 [31]3 years ago

7 0

<h3>Answer:</h3>

B. a compound

<h3>Explanation:</h3>

A mixture is a substance that is made of two or more components that are not chemically combined. For example a mixture of water and paraffin.
A compound, on the other hand, is a pure substance that is made up of two or more atoms of different elements that are chemically joined together.
Unlike an element which can not be broken by chemical means into simpler components, a compound can be chemically broken down to smaller substances such as smaller compounds or individual elements.
Sugar is an example of a compound that is made up of carbon, hydrogen and oxygen atoms.

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Help me to balance this equations pls!<br> C3H8 02 CO+H20<br> Thank you

vichka [17]

Answer:

2C3H8 402 6CO+8H20

Explanation:

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3 years ago

Thermal energy changes states because

Artyom0805 [142]

.Thermal energy, an extensive property, depends on the number of particles in a substance as well as the amount of energy each particle has. If either the number of particles or the amount of energy in each particle changes, the thermal energy of the sample changes. With identi- cally sized samples, the warmer substance has the greater ther- mal energy. hope that helps.

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3 years ago

What is the concentration of OH − and pOH in a 0.00066 M solution of Ba ( OH ) 2 at 25 ∘ C? Assume complete dissociation.

Allushta [10]

<u>Answer:</u> The hydroxide ion concentration and pOH of the solution is $1.32\times 10^{-3}M$ and 2.88 respectively

<u>Explanation:</u>

We are given:

Concentration of barium hydroxide = 0.00066 M

The chemical equation for the dissociation of barium hydroxide follows:

$Ba(OH)_2\rightarrow Ba^{2+}+2OH^-$

1 mole of barium hydroxide produces 1 mole of barium ions and 2 moles of hydroxide ions

pOH is defined as the negative logarithm of hydroxide ion concentration present in the solution

To calculate pOH of the solution, we use the equation:

$pOH=-\log[OH^-]$

We are given:

$[OH^-]=(2\times 0.00066)=1.32\times 10^{-3}M$

Putting values in above equation, we get:

$pOH=-\log(1.32\times 10^{-3})\\\\pOH=2.88$

Hence, the hydroxide ion concentration and pOH of the solution is $1.32\times 10^{-3}M$ and 2.88 respectively

3 0

3 years ago

The reaction between carbon tetrachloride, CCl4, and water, H2O, to form carbon dioxide, CO2, and hydrogen chloride, HCl, has a

xxTIMURxx [149]

Answer:

High activation energy is the reason behind unsuccessful reaction.

Explanation:

There are two types of reaction: (1) thermodynamically controlled reaction and (2) kinetically controlled reaction.

Thermodynamically controlled reaction are associated with change in enthalpy during reaction. More negative the enthalpy change, more favored will be the reaction.

Kinetically controlled reaction are associated with activation energy of a reaction. The lower the activation energy value, the more rapid will be the reaction.

Here, reaction between $CCl_{4}$ and $H_{2}O$ is thermodynamically favored due to negative enthalpy change but the high activation energy does not allow the reaction to take place by simple mixing.

6 0

3 years ago

José and Laurel measured the length of a stick's shadow during the day. Without knowing the length of the stick, which of their

vladimir1956 [14]

Answer:

I think in the middle of the day because the sun isn't going down yet

Explanation:

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3 years ago