What is the difference between physical and chemical change?

2 answers:

8 0

A physical Change is when you change the form, but not the object. such as when you grind wood, you get wood chips. same thing different form. a chemical Change is When You change the substance by adding another substance

Vikki [24]3 years ago

6 0

There are several differences between a physical and chemical change in matter or substances. A physical change in a substance doesn't change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.

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describe how surface area affects the rate of a reaction? 20pts.. Needs to be in your own words, due to this being a part 2 test

34kurt

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7 0

3 years ago

The molar mass of CO2 is 44.01 g/mol. Which is the mass of 3.21×1025 molecules of CO2

sineoko [7]

Given:

Molar mass of CO2 = 44.01g/mol

3.21x10^25 molecules of CO2

Required:

Mass of CO2

Solution:

Avogadro’s number states that for every mole of atom, there are 6.023x10^23 units of atom. The units may be formula units, atoms. In here, you need to divide 3.21x10^25 molecules of CO2 to 6.023x10^23 molecules per mole.

3.21x10^25 molecules of CO2 / 6.023x10^23 molecules per mole = 53.30 moles CO2

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4 years ago

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VARVARA [1.3K]

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4 years ago

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Answer: