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3 years ago

Which of the following is included in the study of Geology?

Chemistry

2 answers:

Oxana [17]3 years ago

7 0

D : the composition of the materials that make up the planet

finlep [7]3 years ago

5 0

D: the composition of the materials that make up the planet

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Which of the following sample will have the greatest average speed at 355 K?. A. CH4. B. Ne. C. C2H4. D. Cl2

Amanda [17]

Answer:

The correct option is methane : $CH_4$ .

Explanation:

Average speed of the gas molecules id given by expression:

$v_{avg}=\sqrt{\frac{8kT}{\pi m}}$

k = Boltzmann cosnatnt

T = Temperature of the gas molecules = 355 K

m = molecular mass of the molecule

$v_{avg}\propto \sqrt{\frac{1}{m}}$

Molar mass of methane = 18 g/mol

Molar mass of neon = 20.18 g/mol

Molar mass of ethene = 28 g/mol

Molar mass of chlorine gas = 70 g/mol

Lower the value of molar mass of gas molecule higher will be the average speed.So, from the given options methane gas greatest average seed because it has lowest molecular mass

6 0

3 years ago

Read 2 more answers

Match the mixture with its description.

Fiesta28 [93]

Solution – A.

Emulsions – B.

Colloid – C.

Homogenous – D.

3 0

3 years ago

Read 2 more answers

For+the+reaction+H2+++I2+-+2HI+the+equilibrium+constant,+kc+is+49+at+a+fixed+temperature.+Two+mole+of+hydrogen+and+two+moles+of+

Sonja [21]

Answer : The initial concentration of HI and concentration of HI at equilibrium is, 0.27 M and 0.386 M respectively.

Solution : Given,

Initial concentration of H_2 and I_2 = 0.11 M

Concentration of H_2 and I_2 at equilibrium = 0.052 M

Let the initial concentration of HI be, C

The given equilibrium reaction is,

H_2(g)+I_2(g)\rightleftharpoons 2HI(g)

Initially 0.11 0.11 C

At equilibrium (0.11-x) (0.11-x) (C+2x)

As we are given that:

Concentration of H_2 and I_2 at equilibrium = 0.052 M = (0.11-x)

The expression of K_c will be,

K_c=\frac{[HI]^2}{[H_2][I_2]}

54.3=\frac{(C+2(0.058))^2}{(0.052)\times (0.052)}

By solving the terms, we get:

C = 0.27 M

Thus, initial concentration of HI = C = 0.27 M

Thus, the concentration of HI at equilibrium = (C+2x) = 0.27 + 2(0.058) = 0.386 M

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3 years ago

In a particular genetic cross, the probability of the offspring having a certain trait is Which percentage represents this proba

AnnyKZ [126]

I think it is 75% sorry if I am wrong but if I am correct can I get brainlest?

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3 years ago

How many major Foods or food groups accounts for 90% of food allergens?

kow [346]

Answer:

Eight foods are responsible for 90 percent of all reactions: peanut, tree nut, milk, egg, fish, shellfish, soy, and wheat.

hope it helped

6 0

3 years ago