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Charra [1.4K]
3 years ago
14

Which statement is true? (2 points) Select one: a. Geothermal power plants use the renewable resource of heat from within the Ea

rth to generate electricity. B. Hydroelectric energy uses the energy from the sun, which is a renewable resource. C. Oil is a nonrenewable resource that is hardly ever used, so there is not a concern of depleting the Earth's supply. D. Solar energy is a nonrenewable resource that is used by many countries all over the world.
Chemistry
1 answer:
love history [14]3 years ago
5 0

The correct answer is A, since it is the only sensible answer.

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S + 6 HNO3 H2SO4 + 6 NO2 + 2 H2O
exis [7]

Answer:

              101.50 g H₂O

Explanation:

The mole ratio of HNO₃ and H₂O is 6 : 2

Hence, 16.9 moles of HNO₃ will produce = 2/6×16.9 = 5.63 moles of H₂O

Also,

Mass = Moles × M.Mass

Mass = 5.63 mol × 18.02 g/mol

Mass = 101.50 g H₂O

5 0
2 years ago
Which of the following organisms in the soil food chain does not obtain energy directly from plants?
aliina [53]
<span>The organisms in the soil food chain that don't obtain energy directly from plants are protozoa.
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3 0
3 years ago
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PLEASE HURRY Which element has the largest atomic radius?<br><br> As<br> N<br> P<br> Sb
notsponge [240]
Sb has the largest atomic radius by 206
5 0
3 years ago
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Practice entering numbers that include a power of 10 by entering the diameter of a hydrogen atom in its ground state, dH=1.06×10
kkurt [141]

Answer:

The diameter of the hydrogen \mathbf{d =1.0605 \times 10^{-10}\ m}

Explanation:

From the given information:

Using the concept of Bohr's Model, the equation for the angular momentum can be expressed as:

L = \dfrac{nh}{2 \pi}

Where the generic expression for angular momentum is:

L = mvr.

replacing the value of L into the previous equation, we have:

mvr= \dfrac{nh}{2 \pi}

v= \dfrac{nh}{2 \pi mr} ----- (1)

The electron in the hydrogen atom posses an electrostatic force which gives a centripetal force.

\dfrac{ke^2}{r^2} = \dfrac{mv^2}{r}   ----- (2)

replacing the value of v in equation (1) into (2), and taking r as the subject of the formula, we have:

\dfrac{ke^2}{r} = m (\dfrac{nh}{2 \pi mr})^2

ke^2=\dfrac{n^2h^2}{4 \pi^2 mr}

r =\dfrac{n^2h^2}{4 \pi^2 mke^2}

For ground-state n = 1

h = (6.625 \times 10^{-34} \ J.s)^2

m =( 9.1 \times 10^{-31} \ kg)(9 \times 10^9 \ N .m^2/C^2)

Ke = (1.6 \times 10^{-19} \ C)^2

r =\dfrac{(1)^2(6.625 \times 10^{-34})^2}{4 \pi^2 (9.1 \times 10^{-31} )(9 \times 10^9 ) (1.6 \times 10^{-19})^2}

r =\dfrac{4.3890625 \times 10^{-67}}{8.27720295 \times 10^{-57}}

\mathbf{r = 5.3025 \times 10^{-11} \ m}

Therefore, the diameter of hydrogen d = 2r

\mathbf{d = ( 2 \times  5.3025 \times 10^{-11} \ m})}

\mathbf{d =1.0605 \times 10^{-10}\ m}}

4 0
3 years ago
Which of the following uses a nonrenewable energy source to generate energy
storchak [24]
The answer would be B
3 0
3 years ago
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