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xenn [34]
3 years ago
6

A large rift valley can be found along the east coast of Africa. It has been slowly widening over time, and it is now wide enoug

h to contain many large lakes.
Which of these best explains the slow widening of this rift valley over time?
Group of answer choices

Earth's rotation

wind and water erosion

the Moon's gravitational pull

lithospheric plate movement
Chemistry
2 answers:
SVEN [57.7K]3 years ago
5 0

Answer:

C is the answer

Serjik [45]3 years ago
4 0

Answer:

wind and water erosion

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A mechanic needs a radiator to have 50% antifreeze solution. the radiator currently is filled with 4 gallons of 15% antifreeze s
Zanzabum

<span>let x=gallons of current mixture to be drained and replaced with pure antifreeze.
4-x=gallons of current mixture remaining in the car.</span>

<span>
0.15(4-x)+1.00x=0.50 x 4
0.6-.15x+x=2
0.85x=1.4
x=1.4/0.85 =1.65 gal

Thus, 1.65 gallons of current mixture to be drained and replaced with pure antifreeze.</span>

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3 years ago
What is the volume of 0.640 grams of Oz gas at Standard Temperature and Pressure (STP)?
Ilia_Sergeevich [38]

Answer: The volume of 0.640 grams of O_{2} gas at Standard Temperature and Pressure (STP) is 0.449 L.

Explanation:

Given: Mass of O_{2} gas = 0.640 g

Pressure = 1.0 atm

Temperature = 273 K

As number of moles is the mass of substance divided by its molar mass.

So, moles of O_{2} (molar mass = 32.0 g/mol) is as follows.

No. of moles = \frac{mass}{molar mass}\\= \frac{0.640 g}{32.0 g/mol}\\= 0.02 mol

Now, ideal gas equation is used to calculate the volume as follows.

PV = nRT

where,

P = pressure

V = volume

n = no. of moles

R = gas constant = 0.0821 L atm/mol K

T = temperature

Substitute the values into above formula as follows.

PV = nRT\\1.0 atm \times V = 0.02 mol \times 0.0821 L atm/mol K \times 273 K\\V = 0.449 L

Thus, we can conclude that the volume of 0.640 grams of O_{2} gas at Standard Temperature and Pressure (STP) is 0.449 L.

6 0
3 years ago
Please help I will mark Brainly
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The product is Fe2O3.
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(s) means the substance is in the solid state, and (g) means in a gaseous state (or the substance is a gas in that reaction).
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3 years ago
A transfer of heat within a liquid or gas that involves warm particles moving in currents is?
myrzilka [38]
It is called convection. When warm air, or current, moves up and disperse outwards as cold air, or current, moves into the warmer region.
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3 years ago
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Chemical reactions are _____.
lana66690 [7]

Answer:

I think the answer is B)the processes in which molecules interact to form new subtances.

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