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3 years ago

7

Having a difficult time please help me ;( I would appreciate whoever helps me thank you! If you can explain that would be awesom

e thank you!

1 answer:

SOVA2 [1]3 years ago

3 0

Answer: A. 11

Explanation: The balance equation is:

C7H16 + 11 O2 => 7CO2 + 8H2O

This is a combustion reaction where a hydrocarbon reacts with oxygen gas to form CO2 and H2O.

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During a chemical reaction, how do the substances that form differ from the substances that react?

cricket20 [7]

Answer:

A physical change, such as a state change or dissolving, does not create a new substance, but a chemical change does. ... In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.

Explanation:

8 0

2 years ago

Read 2 more answers

Write a balanced nuclear equation for the following: The nuclide astatine-218 undergoes alpha emission to give bismuth-214

galina1969 [7]

Answer:

$^{218}_{85}At\rightarrow ^{214}_{83}Bi+^{4}_{2}He$

Explanation:

Hello there!

In this case, since the radioactive reaction for the alpha emission of astatine-218 to bismith-214 involve the release of a helium atom as shown below:

$^{218}_{85}At\rightarrow ^{214}_{83}Bi+^{4}_{2}He$

Whereas the atomic number decreases by 2 and the mass number by 4 in agreement to the release of the Helium atom.

Regards!

7 0

3 years ago

Help would be appreciated please!

PolarNik [594]

Highlight it and hit ctrl shift and l then scroll till u see your question and the answer should be there bc i've done it before and i have got a 100 each time

5 0

2 years ago

Read 2 more answers

What is activation energy

Stolb23 [73]

The minimum amount of energy that colliding particles must have for them to react.

4 0

3 years ago

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If a solution has a pOH of 8.71, what is the [H+]?

TEA [102]

Answer: $5.1\times 10^{-6}M$

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

$pH=-\log [H^+]$

$pH+pOH=14$

Putting in the values:

$pH=14-8.71=5.29$

$5.29=-log[H^+]$

$[H^+]=5.1\times 10^{-6}$

Thus $[H^+]$ is $5.1\times 10^{-6}M$

6 0

3 years ago