The most common fuel for nuclear fission reactors is:a) coal
b) krypton
c) uranium-235
d) none of the above

Answers

Answer 1

Answer: C. Uranium-235

Thus, your answer.

(I took this on a quiz I had, known as a Quick Check to INCA students.)

XD

Answer 2

Answer: c) uranium-235 is the correct answer

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5.This ancient element symbol
means ...
A. copper
B. silver
c. gold
D. tin

Answers

Answer:

A im pretty sure

Explanation:

A mixture of oxygen, hydrogen, and nitrogen exerts a total pressure of 378 kPa. If the partial pressures of oxygen and hydrogen are 212 kPa and 101 kPa respectively, what is the partial pressure exerted by nitrogen?

Answers

What's the relationship between total and partial pressure? The total pressure is the sum of the parcial pressures!

So for us, it would be:

378= 212+101+x

where x is the parcial pressure of nitrogen.

Now we count:
378= 212+101+x
378=313+x
378-313=x
65=x

So the parcial pressure exerted by nitrogen is 65!

How many atoms are in 3.50 moles of calcium (Ca)?

Answers

$1\ mole\ --\ 6.02*10^(23)atoms\n 3.5\ moles--x\n x=21.07*10^(23)\ atoms$

No. of atoms = no.of moles x avagadro's constant

= 3.50 x 6.022*10^23

= 21.077 x 10 ^23

Your tongue has about 3,000 taste buds.
True
False

Answers

false , tongue has more than 9000 taste buds .

Which of the following describes the Bohr atomic model?A. Protons, neutrons, and electrons orbit around each other in set paths.
B. The nucleus contains protons and neutrons and is orbited by electrons.
C. Protons, neutrons, and electrons occupy the same spaces within the atom.
D. Protons occupy the center of an atom, with neutrons and electrons circling.

Answers

Answer: option B. The nucleus contains protons and neutrons and is orbited by electrons.

This is the planetary model, which is so known nowadays, but it is not correct. The quantum model is based in orbitals (not orbits), which are regions around the nucleus where are the electrons, but they are not circling around the nucleus.

A physical change is __________ if energy is given off.Select one:
a. exothermic
b. endothermic
c. a chemical change
d. not possible