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3 years ago

The Groups 1 and 2 on the periodic table contain what atom type?

Chemistry

2 answers:

Bumek [7]3 years ago

8 0

Non metals
and metals

coldgirl [10]3 years ago

3 0

Metals and also nonmetals

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Which of the following molecules or ions is polar? (20 POINTS)

inessss [21]

Answer:

All of these three are polar molecules or ions

Explanation:

1) CO3 ^2-

It is a polar ion because it consists of one Oxygen atom and three carbon atoms so there is a substantial electroegativity difference between carbon and Oxygen due to which shared electrons are attracted more towards Oxygen creating partial negative charge on it and less towards carbon creating a partial positive charge on it, which makes the overall ion polar.

2) HCN

HCN is a polar molecule because there is substantial electronegativity difference between Carbon and Hydrogen as well as between Carbon and Nitrogen. Due to this negative charge is induced over Nitrogen because electronegativity of Nitrogen is 3.0 and positive charge on Carbon because its electronegativity is 2.5. The overall molecule is polar.

3) NO3^-1

Nitrate ion is also a polar molecule because there are three atoms of Oxygen and one atom of Nitrogen. There is substantial electronegativity difference between oxygen (3.44) and nitrogen (3.0) due to which partial positive charge is created on Nitrogen and partial negative charge created over three Oxygen atoms. The overall molecule is polar.

Hope it helps!

8 0

4 years ago

A chemist working for Udensi industries wants to create a new ink for tattoos and cosmetics. Determine the theoretical yield of

leva [86]

Answer:

35.36 g

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

8Fe + S₈ —> 8FeS

Next, we shall determine the mass of Fe that reacted and the mass of FeS produced from the balanced equation. This can be obtained as follow:

Molar mass of Fe = 56 g/mol

Mass of Fe from the balanced equation = 8 × 56 = 448 g

Molar mass of FeS = 56 + 32 = 88 g/mol

Mass of FeS from the balanced equation = 8 × 88 = 704 g

SUMMARY:

From the balanced equation above,

448 g of Fe reacted to produce 704 g of FeS.

Finally, we shall determine the theoretical yield of FeS as follow:

From the balanced equation above,

448 g of Fe reacted to produce 704 g of FeS.

Therefore, 22.5 g of Fe will react to produce = (22.5 × 704)/448 = 35.36 g of FeS.

Thus, the theoretical yield of FeS is 35.36 g

3 0

3 years ago

grapevine trimming and other aromatics can be wrapped in aluminum foil with a few holes poked in it to?

Juli2301 [7.4K]

I need a little more context but I believe you are correct

7 0

3 years ago

A substance produces a solution with negative compounds when mixed with water.\

Liono4ka [1.6K]

Answer:

umm... the 3 one

Explanation:

hope im right

8 0

3 years ago

Ouabain is a poison that binds to the Na+/K+ pump in the cell membrane and inhibits its action. The expected result of this pois

IRISSAK [1]

Answer: A loss of the ion concentration gradient that drives this process.

Explanation:Ouabain known as g-strophanthin, is a cardiac glycoside that can be medically used to treat hypotension.It acts by nhibiting the sodium - potassium (Na/K-ATPase) by causing a loss of the ion concentration gradient that drives it's process. Originally, it was a toxic plant that was used as an arrow poison in eastern Africa for hunting and warfare. Recently, Ouabain is synthesized by animals and secreted from the adrenal cortex to regulate body osmosis.

5 0

3 years ago