2 years ago

I beg you please please I beg you help me please I’m litterly crying please :(

Chemistry

1 answer:

Anna35 [415]2 years ago

4 0

Nitrogen is the answer

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How many Fe atoms and how many moles of Fe atoms are in 500.g of iron?

ser-zykov [4K]

MFe: 56 g/mol
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56g ----- 1 mol
5g ------- X
X = 5/56 = 0,089 moles of Fe

56g ----- 6,02×10²³ atoms
5g ------- X
X = (5×6,02×10²³)/56
X = 0,5375×10²³ = 5,375×10²² atoms of Fe

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2 years ago

PLEASE HURRY! What is the name of this alkane?

belka [17]

Answer:

C. 1-ethyl, 3-methylcyclohexane

(Photo for proof at the bottom.)

Explanation:

The 1-ethyl is because you start numbering from the longest branch, towards the next closest branch. Prefix "eth-" means two, there are 2 carbons in the longest branch. 3-methyl is because the next branch is at number 3, and prefix "meth-" means 1, there is 1 carbon in that chain. "Cyclo" in cyclohexane means the skeletal model is shaped like a ring, and the "hexane" means there are 6 carbons in the ring. Prefix "hex" means 6.

Here's a photo of the unit review on Edge. Refer to the 2nd attachment for a visualization.

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3 years ago

Why would the federal government and city government find it necessary regulate water standard?

Helga [31]

They do this so that when you drink it or use it the contaminates that used to be in it dont make you sick

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DedPeter [7]

Sissy imposter among us haha

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compare a humans changes during exercise to the changes that occur a during a dogs exercise when it is exposed to a hot environm

svetoff [14.1K]

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Dogs will tend to, in hot environments, lay on the floor or where the surface is cooler. Since they cannot simply strip their clothing to keep cool they tend to find cool surfaces, fans, sources of air, etc. to keep cool from the heat.

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3 years ago