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Semenov [28]
3 years ago
5

Someone pls help me I will make you brain

Chemistry
1 answer:
vampirchik [111]3 years ago
7 0

Answer:

it's last

I,II,III

~john from india

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Why is paper towel absorbing water a chemical change
Anastaziya [24]

Answer:

it is not a chemical change

Explanation:

it is a physical change as a paper towel can be  dried in the sun to turn into a regular paper towel thus proving that a paper towel absorbing water is a physical change not a chemical change

5 0
3 years ago
A chemist measures the amount of iodine solid produced during an experiment. He finds that of iodine solid is produced. Calculat
Dimas [21]

The question is incomplete, the complete question is:

A chemist measures the amount of iodine solid produced during an experiment. He finds that 8.31 g of iodine solid is produced. Calculate the number of moles of iodine solid produced. Round your answer to the correct number of significant digits.

<u>Answer: </u>The number of moles of solid iodine produced is 0.0327 moles

<u>Explanation:</u>

The number of moles is defined as the ratio of the mass of a substance to its molar mass.  The equation used is:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}} ......(1)

Given mass of solid iodine = 8.31 g

Molar mass of solid iodine = 253.8089 g/mol

Plugging values in equation 1:

\text{Moles of solid iodine}=\frac{8.31g}{253.8089g/mol}=0.0327mol

Hence, the number of moles of solid iodine produced is 0.0327 moles

8 0
4 years ago
The molar mass of carbon dioxide (CO2) is 44.01 g/mol. The molar mass of water (H2O) is 18.01 g/mol. A reaction uses 528 g of CO
Nataly [62]
The reaction that results from this is:

H2O + CO2 --> H2CO3

Stoichiometric ratio between water and CO2 is 1:1. So we can say that for every Mole of CO2, we need 1 Mole of water to produce 1 Mole of H2CO3. Thus as n=m/M we can find n = 528/44.01 = 11.997 ~ 12Mol.

therefore, we need 12 moles of water.
5 0
4 years ago
Read 2 more answers
What problem would a person have if the nucleic acid in one of his or her
Dmitry_Shevchenko [17]
The answer is B i think
7 0
3 years ago
which statement describes all chemical changes but not all physical changes a bubbles are produced b a new substance forms c pha
kirill [66]

The correct answer is:

B; A new substance forms.

Explanation:

A physical change, such as a state change or dissolving, does not produce a new substance, but an abundant change does. In a chemical reaction, the atoms and molecules that connect with each other are described as reactants. Chemical reactions happen when chemical bonds are broken and formed. If the molecules in a substance crash into each other with enough energy, some of the bonds in the molecules can break. The atoms can make new bonds with different atoms. A new substance forms.

8 0
3 years ago
Read 2 more answers
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