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lions [1.4K]
3 years ago
8

Can a physical change, change what a substance is

Chemistry
1 answer:
Nadusha1986 [10]3 years ago
7 0
No, only a chemical change will change what a subtance is...physical change pertains to smell, color, etc...
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Which sample contains the largest number of molecules?
joja [24]
The largest number of molecules  is the same as the largest number of moles of this molecules
to calculate the number of moles you have to divide the mass by the molar mass

molar masses:
CO2:  44,01 g/mol
CH4: 16,04 g/mol
CBr4: 331,63 g/mol
CHBr3: 252,73 g/mol

largest nº of mol= 100/(the smallest molar mass possible)
= 100/16,04
=6,23 moles

all other molecules would be smaller than 6,23 moles because the molar mass is so high.

The answer is B : 1<span>00 g of ch4</span>
4 0
4 years ago
In a balanced chemical equation, the numbers of individual particles and the numbers of moles of particles are represented by th
Yuri [45]
In a balanced chemical equation, the numbers of individual particles and the numbers of moles of particles are represented by the COEFFICIENTS.

:-) ;-)
7 0
3 years ago
Which of the following contains a nonpolar covalent bond?
svet-max [94.6K]
I think the answer is C. 02
3 0
3 years ago
If you have 35 ml of gas in a closed container under 1.23 atm of pressure, what will the volume be if the pressure increased to
Over [174]

Answer:

New volume is 14.35 mL

Explanation:

When a system of a gas keeps on constant its temperature and number of moles, the pressure is modified indirectly proportional to the volume:

Pressure increased → Volume decreased

Pressure decreased → Volume increased.

The relation you have to apply is: P₁ . V₁ = P₂. V₂

1.23 atm . 35 mL = 3 atm . V₂

(1.23 atm . 35 mL / 3 atm)  = V₂

V₂ = 14.35 mL

5 0
3 years ago
Read 2 more answers
This really isn't a question, but have a good day!
larisa86 [58]

Answer:

U TOO

Explanation:

THX FOR EM POINTS.

5 0
4 years ago
Read 2 more answers
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