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3 years ago

Which of these best explains why a paper clip can float on water? A)Water has a very high specific heat.

Chemistry

2 answers:

stiks02 [169]3 years ago

3 0

Answer:

The answer is d. water molecules near the surface produce more buoyant force than water molecules within the liquid

Explanation: Surface tension is defined as the attraction on the water of like particles to one another. Water molecules on a surface undergoes cohesion or the sticking together of one molecule to another of the same material.

Debora [2.8K]3 years ago

3 0

Answer:

D)Water molecules near the surface produce more buoyant force than water molecules within the liquid.

Explanation:

Buoyant force that is provided by water molecules such that the object can float on the surface of the water. According to Archimedes principle for flotation to occur the buoyant force must be equal to the weight of the object. If the buoyant force is less than the weight of the object, then the object will sink.

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What is the molar mass of CO2

mina [271]

Molar mass of CO2 = 44.01 g/mol

5 0

3 years ago

When a hydrogen atom makes the transition from the second excited state to the ground state (at -13.6 eV) the energy of the phot

viktelen [127]

Answer : The energy of the photon emitted is, -12.1 eV

Explanation :

First we have to calculate the $'n^{th}'$ orbit of hydrogen atom.

Formula used :

$E_n=-13.6\times \frac{Z^2}{n^2}ev$

where,

$E_n$ = energy of $n^{th}$ orbit

n = number of orbit

Z = atomic number of hydrogen atom = 1

Energy of n = 1 in an hydrogen atom:

$E_1=-13.6\times \frac{1^2}{1^2}eV=-13.6eV$

Energy of n = 2 in an hydrogen atom:

$E_3=-13.6\times \frac{1^2}{3^2}eV=-1.51eV$

Energy change transition from n = 1 to n = 3 occurs.

Let energy change be E.

$E=E_-E_3=(-13.6eV)-(-1.51eV)=-12.1eV$

The negative sign indicates that energy of the photon emitted.

Thus, the energy of the photon emitted is, -12.1 eV

3 0

2 years ago

This is very helpful, but what is the best one?

Mice21 [21]

Can you tell us what you mean and post the questions ?

8 0

3 years ago

Please help with 14-16 <br> Thank you!

Natalka [10]

I don't know about 14, but 15 is (4), because a liquid draws in heat to turn into a gas. 16 is (2), because to turn into a cold solid, something has to release heat.

4 0

2 years ago

Please help me I don't know these.

blagie [28]

Add x on all of them I just took what ur taking rn !!!!!

4 0

2 years ago

Read 2 more answers