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2 years ago

I NEED HELP ASAP WILL MARK BRAINLIEST!!!

Chemistry

1 answer:

andreev551 [17]2 years ago

7 0

The answer is b.) Levi crosses a horse with a donkey to a create a mule. The mule is stronger than both of its parents.

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What is the function of tunnels and passageways in subsurface mining?

dexar [7]

The answer is D because they would have to make quarries just below the surface to mine
Mineral ores much quicker (Quarries- a large hole/pit under ground used to get stone and minerals)

5 0

2 years ago

What is 190 K in degrees Celsius? Show your work for full credit.

saveliy_v [14]

Answer:

-83.15

Explanation:

190K − 273.15 = -83.15°C

3 0

2 years ago

Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemical

Kazeer [188]

Answer:

$2H_2O\rightarrow 2H_2+O_2$

Explanation:

Hello there!

In this case, for the reaction by which water is decomposed to molecular hydrogen and oxygen:

$H_2O\rightarrow H_2+O_2$

It is necessary to perform the inspection balance process since there is a dissimilar number of atoms of oxygen on both sides; therefore, by putting a 2 on water we balance oxygen:

$2H_2O\rightarrow H_2+O_2$

But now, there are four hydrogens on the left; therefore, we put a 2 on hydrogen to finally balance it:

$2H_2O\rightarrow 2H_2+O_2$

And obviously, the coefficient in oxygen is an unwritten 1.

Best regards!

7 0

3 years ago

What is the most abundant chemical element in the universe?

Len [333]

hydrogen is the most

5 0

3 years ago

An atom of beryllium (m = 8.00 u) splits into two atoms of helium (m = 4.00 u) with the release of 92.2 kev of energy. if the or

galben [10]

The kinetic energy of the products is equal to the energy liberated which is 92.2 keV. But let's convert the unit keV to Joules. keV is kiloelectro volt. The conversion that we need is: 1.602×10⁻¹⁹ <span>joule = 1 eV

Kinetic energy = 92.2 keV*(1,000 eV/1 keV)*(</span>1.602×10⁻¹⁹ joule/1 eV) = 5.76×10²³ Joules

From kinetic energy, we can calculate the velocity of each He atom:
KE = 1/2*mv²
5.76×10²³ Joules = 1/2*(4)(v²)
v = 5.367×10¹¹ m/s

4 0

3 years ago

Read 2 more answers