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mihalych1998 [28]
3 years ago
9

Water boils at rate of ........and freeze at ........

Chemistry
1 answer:
Schach [20]3 years ago
7 0
100 degree celcius and 0 degree Celsius
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A strontium-90 atom that has lost 2 electrons has ________ protons, ________ neutrons, and ________ electrons.
Sliva [168]
An atom of strontium-90 contains how many electrons, protons, and neutrons?
38e⁻, 38 protons, and 52 neutrons
4 0
2 years ago
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What is the volume of 24.0 g of oxygen gas at STP?
ikadub [295]

v = 16.8

Hope this helps :)

5 0
3 years ago
PLEASE HELP ME ASAPP!!
aliina [53]

Conduction-

putting an icepack on injury

grabbing a warm coffee mug

burning yourself by touching boiling water

the handle of a pot being to hot to touch

Convection-

heat from a fire to warm hands

warm water rising to the surface of of the ocean etc.

warm air rising off pavement

an oven that cooks by cycling warm air through the bottom and out the top

Radiation-

cooking popcorn using microwave

heat from the sun hitting a solar panel

( i havent done science in a while cuz im homeschooled but i think most of these are correct)

good luck on what your working on !!

7 0
3 years ago
Prove that PV = nRT.​
qaws [65]

Find your answer in the explanation below.

Explanation:

PV = nRT is called the ideal gas equation and its a combination of 3 laws; Charles' law, Boyle's law and Avogadro's law.

According to Boyle's law, at constant temperature, the volume of a gas is inversely proportional to the pressure. i.e V = 1/P

From, Charles' law, we have that volume is directly proportional to the absolute temperature of the gas at constant pressure. i.e V = T

Avogadro's law finally states that equal volume of all gases at the same temperature and pressure contain the same number of molecules. i.e V = n

Combining the 3 Laws together i.e equating volume in all 3 laws, we have

V = nT/P,

V = constant nT/P

(constant = general gas constant = R)

V = RnT/P

by bringing P to the LHS, we have,

PV = nRT.

Q.E.D

6 0
2 years ago
What is a model that is used to predict possible genotypes and phenotype of offspring?
frutty [35]
This is called the pedigree chart.
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2 years ago
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