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3 years ago

A Rock is determined to be 1.426 billion years old. How much uranium -235 remains in the rock?

Chemistry

2 answers:

beks73 [17]3 years ago

4 0

3.5930 is the answer to the question
Hope this helped

Alexxandr [17]3 years ago

3 0

Answer:3.5930 million

Explanation:

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Suppose a liquid level from 5.5 to 8.6 m is linearly converted to pneumatic pressure from 3 to 15 psi. What pressure will result

wlad13 [49]

Answer:

a) P = 9.58 psi for h=7.2 m

b) P=4.7 psi for h=5.94 m

Explanation:

Since the pressure Pon a static liquid level h is

P= p₀ + ρ*g*h

where p₀= initial pressure , ρ=density , g = gravity

then he variation of the liquid level Δh will produce a variation of pressure of

ΔP= ρ*g*Δh → ΔP/Δh = ρ*g = ( 15 psi - 3 psi) /( 8.6 m - 5.5 m) = 12/3.1 psi/m

if the liquid level is converted linearly

P = P₁ + ΔP/Δh*(h -h₁)

therefore choosing P₁ = 3 psi and h₁= 5.5 m , for h=7.2 m

P = 3 psi + 12/3.1 psi/m *(7.2 m -5.5 m) = 9.58 psi

then P = 9.58 psi for h=7.2 m

for P=4.7 psi

4.7 psi = 3 psi + 12/3.1 psi/m *(h -5.5 m)

h = (4.7 psi - 3 psi)/ (12/3.1 psi/m) + 5.5 m = 5.94 m

then P=4.7 psi for h=5.94 m

5 0

3 years ago

What pressure will be exerted by 0.57 moles of CO2 at a temperature of 25°C and a volume of 500 ML? _____atm

svetlana [45]

The pressure exerted by 0.57 moles of CO2 at a temperature of 25°C and a volume of 500 ml is 28 atm.

<u>Explanation:</u>

According to ideal gas law,

PV = nRT

where P represents the pressure of a gas,

V represents the volume of a gas,

n represents the number of moles,

R represents the gas constant = 0.0821 L atm / mol K.

T represents the temperature of a gas.

Given V = 500 ml = 0.5 l, T = 25°C = 298 K, n = 0.57 mol

PV = nRT

P = nRT / V

= (0.57 $\times$ 0.0821 $\times$ 298) / 0.5

P = 28 atm.

The pressure of a gas is 28 atm.

4 0

4 years ago

At room temperature,table salt is a solid and mercury is a liquid.what conclusion can you draw about the melting points of these

never [62]

That table salt has a high melting point and mercury's melting point is low.

4 0

3 years ago

Read 2 more answers

Calculate the moles in 45.06g of Be

g100num [7]

5.00111 moles in 45.05g of br

5 0

3 years ago

I NEED THE ANSWER IMMEDIATELY!!! Pls helppp

Wewaii [24]

Answer:

turgor pressure can be done in a lab or a self test.

turgor pressure is key to the plant’s vital processes. It makes the plant cell stiff and rigid. Without it, the plant cell becomes flaccid. Prolonged flaccidity could lead to the wilting of plants.

Turgor pressure is also important in stomate formation. The turgid guard cells create an opening for gas exchange. Carbon dioxide could enter and be used for photosynthesis. Other functions are apical growth, nastic movement, and seed dispersal.

Explanation:

salt is bad for turgor pressure.

Turgidity helps the plant to stay upright. If the cell loses turgor pressure, the cell becomes flaccid resulting in the wilting of the plant.
The wilted plant on the left has lost its turgor as opposed to the plant on the right that has turgid cells.

7 0

3 years ago