An element that is malleable and a good conductor of heat and electricity could have an atomic number of.....

Can someone answer these questions for me please?

Monica [59]

Answer:

wowits too long

Explanation:

5 0

4 years ago

A. Acid rainfall will cause a decrease in oceanic surface temperatures.

laiz [17]

Answer:

Increased atmospheric carbon dioxide will cause increased ocean surface temperatures.

Explanation:

Greenhouse gases of which CO2 is a typical example are known to cause a gradual and steady increase in the surface temperature of the earth by trapping infrared rays close to the surface of the earth.

As the surface temperature of the earth rises, the surface temperature of the oceans rises also leading to the tendency towards hurricanes.

Hurricanes are violent storms which are known to form near the equator over warm ocean waters.

Hence, increased atmospheric carbon dioxide will cause increased ocean surface temperature which in turn increases the chances of the occurrence of hurricanes.

6 0

3 years ago

What’s the correct answer

Fed [463]

The correct answer is:
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" F and Br , because they are in the same group" .
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Note:
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Choice [B]: "F and Br ; because they are in the same period" ; is incorrect; since "F" and "Br" are not in the same "period" (that is, "row").
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Choice [C]: "Na and Mg; because they are in the same group {"column"} ; is incorrect; since: "Na" and "Mg are NOT in the same group {"column"].
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Choice [D]: "Na and Mg" ; because they are in the same period {"row"}; is incorrect. Note: "Na" and "Mg" are, in fact, in the same period {"row"}. However, as aforementioned, {Mg and Na} are not in the same group {"column".}.

Note: The similiarities in physical and chemistry properties among elements are determined and organized — or tend to be so—by "groups" {"columns"} — NOT by "periods" {rows}.
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3 0

4 years ago

Arrange the following in order of increasing bond strength of the carbon oxygen bond:

icang [17]

Answer: Option (d) is the correct answer.

Explanation:

It is known that length of a bond is inversely proportional to the bond strength. This also means that a single bond has long length due to which it is weak in nature.

And, a double bond is shorter in length and has more strength as compared to a single bond. Whereas a triple bond has the smallest length and it has high strength as compared to a double or single bond.

For example, carbon monoxide is CO where there is a triple bond between the carbon and oxygen atom.

Carbon dioxide is $CO_{2}$ where there exists a double bond between the carbon and oxygen atom.

A carbonate ion is $CO^{2-}_{3}$ when two oxygen atoms are attached through single bond with the carbon atom and another oxygen atom is attached through a double bond to the carbon atom.

Hence, we can conclude that order of increasing bond strength of the given carbon oxygen bond is as follows.

Carbonate ion < carbon dioxide < carbon monoxide

5 0

3 years ago

First: Calculate the number of moles of Kool-Aid powder needed to make 100mL of a 0.1M solution.

morpeh [17]

For this question, we can use the molarity formula, which is as follows:

$Molarity= \frac{moles}{Liters}$

We know that we want a 0.1M solution in 100 mL, so we can plug those into the equation to find the number of moles required:

$0.1M= \frac{moles}{0.1L}$
$moles=0.01$

So now we know that the number of moles of the Kool-Aid powder is 0.01. We also know that the chemical formula for this powder is $C_{12} H_{22} O_{11}$ .

We can find the molar weight of this powder by taking the atomic weight from the periodic table and multiply it by the number of atoms in the compound. Let's find the molar weight of the powder:

Find the atomic weight of carbon:

$C=12.01 g$

There are 12 C's, so we multiply by 12:

$12.01g*12=144.12g$

Then we have 22 H's, each having an atomic weight of 1.008g:

$1.008g*22=22.18g$

And finally there are 11 O's, each with an atomic weight of 15.99g:

$15.99g*11=175.89g$

Then we add up all of the weights:

$144.12g+22.18g+175.89g=342.19g$ -> So we know that the molar weight of the Kool-Aid powder is 342.19g.

Now we can find the amount of grams that we need for the desired solution as follows:

$\frac{342.19g}{1mol}* \frac{0.01mol}{1}=3.42g$

So now we know that we need 0.01 moles of the powder, and we need 3.42g of the powder to make the desired solution.

7 0

3 years ago