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slava [35]
3 years ago
5

An ice tray full of ice became half full when it was left in the freezer for a long period of time. What phase change made this

occur? A. plasma B. heat C. sublimation D. melting​
Chemistry
1 answer:
zysi [14]3 years ago
5 0
C. Sublimation, hope this helps
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Warm air rises at the equator and cold air sinks at the poles creating
andrey2020 [161]

Answer:

c.convention currents

Explanation:

As hot air cools it sinks back to the surface of the earth, where it gets warmed by the ocean only to rise again.This is called a convection current.

7 0
3 years ago
2. What will you change (the independent variable) in each test?
skad [1K]

Answer:the other vaiabable

Explanation:

8 0
4 years ago
calculate the volume od a CO2 cartridge that has a pressure of 850 PSI at a temperature of 21ºc the cartridge contains 0.273 mol
gladu [14]
Answer is: volume of CO₂ is 0,113 dm³.
Ideal gas law = pV = nRT.
p = 850 PSI = 5860543,6992 Pa.
Psi <span>is the abbreviation of pound per square inch.
T = 21</span>°C = 294,15 K.
n = 0,273 mol.
R = 8,314 J/K·mol.
V = nRT ÷ p
V = 0,273 mol · 8,314 J/K·mol · 294,15 K ÷ 5860543,6992 Pa.
V = 0,00011 m³ = 0,113 dm³.
3 0
3 years ago
In Boston elevation 20 feet, your mass is 75 kg. On top of Mt. Everestt (elevation 29,029 feet) you mass would be
Tpy6a [65]

Answer:

75 kg or 75,000 g

Explanation:

Mass is a measurement that describes the amount of matter within an object. This is a constant measurement that does not change regardless of the object's location.

As such, a person's mass would be the same at both elevations.

**Their weight, however, may change.

** 1 kg = 1,000 g

7 0
2 years ago
The number of energy levels are determined by what __________________ they are in. So, elements with 6 energy levels are found i
Anarel [89]

Answer:

group, 6 or 16

Explanation:

as the group's progress going from the left of the table to the right of the the table, the valance electrons increase. although group 14 is split up by a ladder stair steppy thingy. the ones on the top take electrons, and the ones below give electrons.

6 0
3 years ago
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