Which element has the greatest density at stp? 1. carbon 2. copper 3. chlorine 4. calcium

Answers

Answer 1

Answer: Copper will have the greatest density, followed by calcium, another metal. Carbon will be the third most dense followed by chlorine, which, as a gas, will be MUCH less dense than the other 3

Answer 2

Answer:

Final answer:

Among carbon, copper, chlorine, and calcium, copper has the highest density at standard temperature and pressure.

Explanation:

The element with the greatest density at standard temperature and pressure (STP) among the options given (carbon, copper, chlorine, calcium) is copper. Density, in elemental terms, is determined by the amount of mass packed in a given volume. Copper (Cu) has a density of approximately 8.96 g/cm^3 at STP, which is greater than that of carbon, chlorine, and calcium.

For comparison:
Carbon(C) has a significantly lower density at about 2.26 g/cm^3, chlorine (Cl) is a gas at STP and has a very low density of 0.003214 g/cm^3, and calcium (Ca) has a density of about 1.55 g/cm^3 at STP.

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What did researchers at Virginia Tech try using to help reforest post-mining site soil?

Answers

Answer:

Researchers at Virginia Tech decided to try using biochar to help reforest the post-mining site soil. They got permission to apply a layer of biochar to a post-mining site before it was reseeded and replanted.

Within a single molecule of water, two hydrogen bonds are bonded to a single oxygen atom by_______.However when there are multiple water molecules, the partial negative charge at one end of a water molecule attracted to the partial ositive charge of another water molecule forms ____________.

Answers

Answer:

covalent bonding, hydrogen bonding

Explanation:

The molecular formula of water is $H_2O$ in which the two hydrogen atoms are connected to the oxygen atom via covalent bonds which means that the electrons are shared in the bond.

Hydrogen bonding is a special type of the dipole-dipole interaction and it occurs between hydrogen atom that is bonded to highly electronegative atom which is either fluorine, oxygen or nitrogen atom.

Partially positive end of the hydrogen atom is attracted to partially negative end of these atoms which is present in another molecule. It is strong force of attraction between the molecules.

Thus, when multiple water molecules are there, there are connected by hydrogen bonding.

It's urgent. I need help to know the oxidation numbers and what is the oxidation and reduction part of this equation Fe + H2SO4= Fe2(SO4)3 + H2

Answers

In the given equation: Fe + H2SO4 = Fe2(SO4)3 + H2

To determine the oxidation numbers, we assign oxidation numbers to each element in the equation.

1. Fe: The oxidation number of Fe is 0 since it is in its elemental form.

2. H2SO4:
- H has an oxidation number of +1.
- S has an oxidation number of +6 since it is in the sulfate ion (SO4)2-.
- O has an oxidation number of -2.

3. Fe2(SO4)3:
- Fe has an oxidation number of +3 since it is in the Fe2+ ion.
- S has an oxidation number of +6 since it is in the sulfate ion (SO4)2-.
- O has an oxidation number of -2.

4. H2:
- H has an oxidation number of 0 since it is in its elemental form.

Now, let's analyze the oxidation and reduction parts of the equation:

Oxidation: Fe is oxidized from an oxidation number of 0 to +3 in Fe2(SO4)3.

Reduction: H2SO4 is reduced. The sulfur (S) in H2SO4 goes from an oxidation number of +6 to +4 in Fe2(SO4)3, and the hydrogen (H) in H2SO4 goes from an oxidation number of +1 to 0 in H2.

Overall, in this equation, Fe is oxidized, and H2SO4 is reduced.

How many neutrons are in the isotope carbon-14?A. 6

B. 8

C. 12

D. 14

Answers

the correct answer is a 6

The correct answer is 8

Within each energy level there are different sublevels that are created. Those electrons that have the lowestamount of energy follow paths that are spherical in shape. Which sublevel is associated with this shape?
A)
d.
B)
f
C)
р
D)
S

Answers

It’s option D cause we know that S orbital is spherical

How much heat energy is required to raise the temperature of 0.368 kg of copper from 23.0 ∘C to 60.0 ∘C? The specific heat of copper is 0.0920 cal/(g⋅∘C)

Answers

23.0 + 60.0 = 83.0° C heat energy is required to raise

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