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3 years ago

Question 1 of 10

Chemistry

2 answers:

nikklg [1K]3 years ago

5 0

Answer:

Explanation:

Butoxors [25]3 years ago

4 0

Answer:

C for sure.

Explanation:

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Goodwin County has plenty of water. The residents of Goodwin County enjoy fishing, boating, and swimming in Goodwin Lake. The Go

MrRa [10]

Answer:

I am pretty sure it is a watershed

Explanation:

5 0

3 years ago

Considering that silicon is a metalloid, which of the following statements is true

ycow [4]

D is true because sulfur is a gas sooooooo

7 0

3 years ago

The rotten smell of a decaying animal carcass is partially due to a nitrogen-containing compound called putrescine. Elemental an

balu736 [363]

The empirical formula is $C_2H_6N$ .

Explanation:

Putrescine has the elements like Carbon, Nitrogen and Hydrogen present in them. So in order to determine the empirical formula, we first have to find the number of moles present in the putrescine. As the percentage of C, H and N present in the chemical is given as 54.50%, 13.73% and 31.77%, we assume that 100 g of Putrescine is taken as sample.

Then the mass of C, H and N present in Putrescine will be 54.50 g, 13.73 g and 31.77 g. We know that the molar mass of C is 12 g/mol, H is 1 g/mol and N is 14 g/mol. So divide the mass with the molar mass of the respective elements to determine the number of moles of these elements present in the sample.

$No.\ of\ moles\ of\ C=\frac{\text { Mass of } C}{\text { Molar mass of } C}=\frac{54.50 \mathrm{g}}{12 \mathrm{g} / \mathrm{mol}}=4.54\ moles$

Similarly, the number of moles of H and N present is determined.

$\text { No. of moles of } H=\frac{\text { Mass of } H}{\text { Molar mass of } H}=\frac{13.73 \mathrm{g}}{1 \mathrm{g} / \mathrm{mol}}=13.73 \text { moles }$

$No.\ of\ moles\ of\ N=\frac{\text { Mass of } N}{\text { Molar mass of } N}=\frac{31.77 \mathrm{g}}{14 \mathrm{g} / \mathrm{mol}}=2.27\ moles$

Then the empirical formula can be determined by dividing the number of moles of all elements with the least number of moles that is 2.27.

$\begin{aligned}&\text { No. of atoms of } C=\frac{4.54}{2.27}=2\\&\text { No. of atoms of } H=\frac{13.73}{2.27}=6\\&\text { No. of atoms of } N=\frac{2.27}{2.27}=1\end{aligned}$

So, the empirical formula is $C_2H_6N$ .

3 0

3 years ago

Camphor is a ketone compound and is one of the active ingredients in vicks products. if camphor has m+ = 152 and contains 1 doub

nordsb [41]

Answer:

C₁₀H₁₆O

Explanation:

Molecular formula can be determined from parent peak by using rule of thirteen.

Rule of Thirteen:

First divide the parent peak value by 13 as,

= 152 ÷ 13

= 11.69

Now, multiply 13 by 11,

= 13 × 11 (here, 11 specifies number of carbon atoms)

= 143

Now subtract 143 from 152,

= 152 - 143

= 9

Add 9 into 11,

= 9 + 11

= 20 (hydrogen atoms)

So, the rough formula we have is,

C₁₁H₂₀

Now, add one Oxygen atom to above formula and subtract one Carbon and 4 Hydrogen atoms as these numbers are equal to atomic mass of Oxygen atom as,

C₁₁H₂₀ -------O--------> C₁₀H₁₆O

Calculate Hydrogen deficiency index as,

HDI = (2x + 2 - y) / 2

where,

x = C atoms

y = H atoms

HDI = [2(10) + 2 - 16] / 2

HDI = (20 + 2 - 16) / 2

HDI = (22-16) / 2

HDI = 6 / 2

HDI = 3

It means, Camphor contains 1 double bond and two rings. As, HDI of double bond is 1 and HDI of one ring is 1.

7 0

4 years ago

What causes a change in air pressure

lutik1710 [3]

This change in pressure is caused by changes in air density, and air density is related to temperature.

3 0

3 years ago