All categories

3 years ago

Which two elements make up the main structure of an organic compound?

Chemistry

2 answers:

muminat3 years ago

7 0

Answer:

b nitrogen&oxygen

Explanation:

i'm built different

marshall27 [118]3 years ago

7 0

It’s A because carbon and oxygen make unit to one element

You might be interested in

Which of the following is not a primary function of the products of the pentose phosphate pathway? a. To maintain levels of NADP

zlopas [31]

Answer: The correct answer is D.

Explanation:

As you can see in every step of the pathway, ATP is not generated directly. Although, in the oxidative phase, molecules of NADPH are produced and these can be used for synthesize ATP indirectly; the NADPH molecules are hihgly demanded in tissues that carry out constantly synthesis of fatty acids, such as liver.

Therefore the correct answer is D.

6 0

3 years ago

Scientists are trying to understand the composition of substances on

ahrayia [7]

I believe the answer is b or c. good luck.

3 0

3 years ago

A fossil is found to have a 14 C 14C level of 70.0 70.0 % compared to living organisms. How old is the fossil?

natulia [17]

Answer:

The age of the fossil be $2.1987\times 10^{4} years$ .

Explanation:

Formula used :

$N=N_o\times e^{-\lambda t}\\\\\lambda =\frac{0.693}{t_{\frac{1}{2}}}$

where,

$N_o$ = initial mass of isotope C-14 = x

N = mass of the parent isotope left after the time, (t) = 70.0% of x=0.07x

$t_{\frac{1}{2}}$ = half life of the isotope C-14 = 5730 years

$\lambda$ = rate constant

Let the age of the fossil be t.

Now put all the given values in this formula, we get t :

$0.07x=x\times e^{-(\frac{0.693}{5730 years})\times t}$

$t=2.1987\times 10^{4} years$

The age of the fossil be $2.1987\times 10^{4} years$ .

8 0

3 years ago

Type of disease in which the body attacks is own cell

n200080 [17]

Autoimmune disease

which is a disease that attacks itself

7 0

3 years ago

Read 2 more answers

Indicate whether each of the following compounds will gave an acidic, basic or neutral solution when dissolved in water. Clear A

allsm [11]

Answer: ammonium bromide : acidic : The pH will be less than 7.

potassium cyanide : basic :The pH will be more than 7.

calcium nitrate: neutral : The pH will be approximately equal to 7.

calcium hypochlorite : basic :The pH will be more than 7.

Explanation:

pH is defined as the negative logarithm of hydrogen ion concentration. The scale ranges from 0 to 14.

When a solution is acidic, it will show a pH in the range of 0 - 6.9. When a solution is basic, it will show a pH in the range of 7.1 - 14. When a solution is neutral, it will show a pH of 7.

ammonium bromide : $NH_4Br$ : acidic as it is formed from the combination of strong acid HBr and weak base $NH_4OH$

potassium cyanide : $KCN$ : basic, as it is formed from the combination of weak acid HCN and strong base KOH

calcium nitrate: $Ca(NO_3)_2$ : neutral, as it is formed from the combination of strong acid and strong base.

calcium hypochlorite : $Ca(ClO)_2$ : basic, as it is formed from the combination of weak acid $HOCl$ and strong base $Ca(OH)_2$

3 0

4 years ago