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Zinaida [17]
3 years ago
7

A rock can be broken down into different kinds of substances by physical processes. No chemical reactions are needed to separate

different parts of a rock into pure substances. This is because a rock is a(n)
Chemistry
2 answers:
murzikaleks [220]3 years ago
7 0

Answer:

Mixture

Explanation:

- Can be separated by physical means

-  Does not have fixed ratios between components

Edu 2020

sineoko [7]3 years ago
4 0
Solid and just need force to break it down
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An airplane flies at a constant speed of 920 km/h. How long will it take the plane to travel a distance of 1150 km?
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Answer:

1.25 hours or 75 minutes or 1 hour and 15 minutes

Explanation:

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2 years ago
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Choose the molecular compound among the substances listed below.
agasfer [191]

Answer: Among the listed substances XeCl_{4} is the molecular compound.

Explanation:

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4 0
2 years ago
What is the volume of 9.5 g fluorine gas, F2, at STP?
Tju [1.3M]

Answer:

5.6L

Explanation:

At STP, the pressure and temperature of an ideal gas is

P = 1 atm

T = 273.15k

Volume =?

Mass = 9.5g

From ideal gas equation,

PV = nRT

P = pressure

V = volume

n = number of moles

R = ideal gas constant =0.082J/mol.K

T = temperature of the ideal gas

Number of moles = mass / molar mass

Molar mass of F2 = 37.99g/mol

Number of moles = mass / molar mass

Number of moles = 9.5 / 37.99

Number of moles = 0.25moles

PV = nRT

V = nRT/ P

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3 years ago
What is common to all elements in the same group on the periodic table
marin [14]
They all have the same number of electrons.
3 0
2 years ago
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