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3 years ago

6

 What properties make silicon effective in making solar panels? List 5 properties.

1 answer:

AlekseyPX3 years ago

7 0

Answer:

Silicon is one of the highest quality semiconductors that is ideal for solar cell production. The superior quality of silicon’s electronic, optical, thermal, and environmental properties are best for producing solar cells. Also, the availability and affordability make it more usable for solar panels.

These are the five properties. Hopefully, this helps! :)

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Which of the following statements about moles is correct? A mole of Cu atoms has the same number of atoms as a mole of He atoms.

HACTEHA [7]

There are two that seem correct to me but i would go with the first answer choice, a mole of cu atoms has the same number or atoms as a mole of he atoms.

8 0

3 years ago

Read 2 more answers

Multiple choice-- please help!

kvasek [131]

The rate law for the reaction : r=k.[A]²

<h3>Further explanation</h3>

Given

Reaction

A ⟶ B + C

Required

The rate law

Solution

The rate law is a chemical equation that shows the relationship between reaction rate and the concentration / pressure of the reactants

For the second-order reaction it can be:

1. the square of the concentration of one reactant.

$\tt r=k[A]^2$

2. the product of the concentrations of two reactants.

$\tt r=k[A][B]$

And the reaction should be(for second order) :

2A ⟶ B + C

Thus, for reaction above (reactant consumption rate) :

$\tt r=-\dfrac{\Delta A}{2\Delta t}=k[A]^2$

6 0

3 years ago

A student determined that a 50mL sample of an unknown liquid had a density of 1 g/mL. A 100mL sample of the same liquid would ha

Lyrx [107]

Answer: False

Explanation: The density of the liquid will always be the same, no matter how much of the liquid you have.

For example, the density of the water in a pool is the same density as the water in a small cup.

4 0

3 years ago

#3 please and thank the you

Anuta_ua [19.1K]

The answer is d hope it helps.

6 0

3 years ago

Which element in Group 15 has the strongest metallic character

mihalych1998 [28]

Bi (Bismuth), will have the strongest metallic character, as it is the last element in group 15.

3 0

3 years ago