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lina2011 [118]
3 years ago
9

Cassandra looked out the window. She saw a boy moving down through the air.

Chemistry
2 answers:
VikaD [51]3 years ago
8 0

Answer:

The Girl will go up and the Boy will go down

Explanation:

QveST [7]3 years ago
3 0

Answer:

she will go up and the boy will go down

Explanation:

when she pushes with her feet it pushes her up and so the boy must go down as that is how seesaws work

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Solve the problem for the moles of oxygen.<br> mol O2<br> DONE
Elza [17]

Answer: The answer is 0.245

Explanation: That is what it said the answer was

8 0
2 years ago
Which two subatomic particles have the greatest mass?
denpristay [2]

Answer:

PROTON AND NEUTRON

Explanation:

  • The mass of proton is : 1.67*10^{-27}kg

A proton is one of the main particles that make up the atom . The other two particles are neutron and electron. Protons are found in the nucleus of the atom.This is a tiny , dense region at the centre of the atom. Protons have a positive charge of one (+1) and a mass of 1 atomic mass unit ( amu ) , which is about 1.67*10^{-27}kg. Together with neutrons , they make up virtually all of the mass of an atom.

  • The  mass of neutron is also approximately: 1.67*10^{-27}kg but a little more than that .

Atoms of all elements - except Hydrogen , have neutrons in their nucleus . Unlike protons and electrons , these have no charge - they are electrically neutral . The mass of a neutron is slightly greater than the mass of a proton but not very significant

6 0
3 years ago
Please help i will give extra points
GREYUIT [131]

Answer:

B. Coal

Explanation: Coal is mined to produce energy.

3 0
2 years ago
For the reaction of hydrogen with iodine
fenix001 [56]

Answer:

r_{H_2} = \frac{-1}{2} r_{HI}

Explanation:

Hello!

In this case, considering the given chemical reaction:

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

Thus, by applying the law of rate proportions, we can write:

\frac{1}{-1} r_{H_2} = \frac{1}{-1}r_{i_2} = \frac{1}{2} r_{HI}

Whereas the stoichiometric coefficients of reactants are negative due their disappearance and that of the product is positive due to its appearance. In such a way, when we relate the rate of disappearance of hydrogen gas to the rate of formation of hydrogen iodide, we obtain:

r_{H_2} = \frac{-1}{2} r_{HI}

Best regards!

8 0
2 years ago
HELP! I WILL GIVE BRAINLIST!
Dominik [7]

Answer:

carbon

Explanation:

i hope this helps

8 0
2 years ago
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