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Anastasy [175]
3 years ago
9

What is the difference between a physical change and a chemical change? give examples for both​

Chemistry
1 answer:
Tanya [424]3 years ago
7 0

Answer:

Physical change is a temporary change. A chemical change is a permanent change.

Explanation:

A Physical change affects only physical properties i.e. shape, size, etc. Chemical change both physical and chemical properties of the substance including its composition.

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You determine that a sample of a compound contains 1. 4 mol c and 2. 1 mol h. What is the empirical formula for this compound?.
vlada-n [284]

The empirical formula of the compound is C4H1.

An empirical formula represents the whole number ratio of various atoms present in a compound.

If the mass percent of various elements present in a compound is known, its empirical formula can be determined

We are given that a compound contains 4 mole C and 1 mole H.

Hence, the ratio of C: H is 4:1, which is already in the form of the simplest whole number.

Therefore, the empirical formula of the given compound is C4H1 and its molecular mass is 12 x 4 + 1 = 49.

To know more about "Empirical Formula", refer to the following link:

brainly.com/question/14044066?referrer=searchResults\

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8 0
2 years ago
How many moles are in 35.6 g of H2O
klasskru [66]

Answer:

Given

mass of H2O (m) =35.6g

molarmass (mr) = H2O ), 1x2+16=18g/mol

moles of H2O (n) =?

sln

n=m/mr

n=35.6g/18g/mol

n=1.978moles

the moles of H2O are 1.978moles

3 0
2 years ago
9. To become like a noble gas the element P will have a charge of
MrRa [10]

Answer:

to become a noble gas element P will have 2 electrons in it's outer most energy level if it has one energy level

and eight in the last energy level if more than one

6 0
3 years ago
Which of the following is not a form of radiation? Radio waves or sound waves or microwaves or gamma waves
Svetlanka [38]
Sound waves.
Radio waves and Microwaves are non-ionizing radiation. Gamma waves are ionizing radiation
3 0
2 years ago
A person buildirig an aquarium would benefit from adding a livce rock to their aquarium because ?
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It introduces a diverse array of bacteria, algae, and invertebrates to the closed marine environment and functions as a superior biological filter
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