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nexus9112 [7]
3 years ago
8

What is the answer for this 7th grade science

Chemistry
2 answers:
Doss [256]3 years ago
8 0
Answer is 4. they refer to atoms
Vaselesa [24]3 years ago
5 0
The green and black symbols refer to atoms, that make up the molecule of water, more specifically you can say that the 2 Hydrogen atoms are the black ones found outside, while the central atom, that is also green would be oxygen.
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Convert 100 grams of methane CH4 to number of atoms
Llana [10]
 there would be 3.752*10^24 atoms in 100 grams of CH4
Steps:
CH4: 12.01+4(1.01)=16.05
100g/16.05 mol mass=6.23g/mol
6.23*6.02*10^23=3.75*10^24
8 0
3 years ago
Hi! help me please. CALCULATE THE NUMBER OF MOLECULES FOUND IN 8 MOL OF WATER?
kvasek [131]

Answer:

so the number of molecules in 8 moles of water is 4.8176×10^24

Explanation:

number of moles=8moles

avogadro's number=6.022×10²³

number of molecules=?

as we know that

number of moles=\frac{number of molecules}{avogadro's number}

substituting the equation

number of moles × avogdro's number=number of molecules

number of molecules=8moles×6.022×10²³

number of molecules=4.8176×10^24

i hope this will help you :)

4 0
3 years ago
How is condensation explained by the Kinetic Molecular Theory? Cooling reduces particle motion, resulting in coalescence by attr
lara31 [8.8K]

Temperature means, in this context, movement.

Condensation can be explained by the reduction of temperature of the system. This effect make possible the cohesion forces increases. In other words, the result is coalescence by attractive forces.

7 0
3 years ago
Read 2 more answers
A gas occupies a volume of 50.0 mL at 100K and 630 mmHg. At what temperature would
rodikova [14]
PV / T = P'V' / T'

V = V'

P / T = P' / T'

P = 630 mmHg
T = 100 K
P' = 1760 mmHg
T' = ?

630 / 100 = 1760 / T'

T' = 1760 / 6,3

T' = 279,36 K

T' ≈ 280 K
3 0
3 years ago
Consider the differences between organic and inorganic
ZanzabumX [31]

Answer: organic compounds has made up of  organic materials inorganic compounds are made up of inorganic materials.

organic compounds make good electrolytes

inorganic compounds exhibit ionic bonding

organic compounds lower melting points

Explanation:

6 0
4 years ago
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