1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lora16 [44]
3 years ago
13

Which group of elements are the most important for living organisms?\

Chemistry
2 answers:
Drupady [299]3 years ago
6 0
B- Carbon nitrogen and oxygen. All organisms are made up of carbon, oxygen is essential to breath, and nitrogen makes up most of earth's atmosphere.
Serhud [2]3 years ago
4 0
The answer is b carbon nitrogen and oxygen

You might be interested in
Consider the following reaction at equilibrium: 2 NH3(g) ⇄ N2(g) + 3 H2(g) What does Le Chatelier's principle predict will happe
BabaBlast [244]

Answer : The equilibrium will shift in the left direction.

Explanation :

Le-Chatelier's principle : This principle states that if any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.

The given reaction is:

2NH_3(g)\rightleftharpoons N_2(g)+3H_2(g)

As per question, when we are adding N_2  then the concentration of N_2 is increased on product side then the equilibrium will shift in the direction where decrease of concentration of N_2 takes place. Therefore, the equilibrium will shift in the left direction.

Thus, the equilibrium will shift in the left direction.

7 0
3 years ago
Equal volumes of 0.1m naoh and 0.1m hcl are thoroughly mixed. the resulting solution has a ph closest to
son4ous [18]
Lets assume x volume of NaOH and x volume of HCl are added together.
NaOH ---> Na⁺ + OH⁻
NaOH is a strong base therefore it completely ionizes and releases OH⁻ ions into the medium
HCl ---> H⁺ + Cl⁻
HCl is a strong base and completely ionizes and releases H⁺ ions in to the medium. number of NaOH moles in 1 L - 0.1 mol
Therefore in x L - 0.1 /1 * x = 0.1x moles of NaOH present 
Similarly in HCl x L contains - 0.1x moles of HCl
H⁺ + OH⁻ ---> H₂O
Due to complete ionisation, 0.1x moles of H⁺ ions and 0.1x moles of OH⁻ ions react to form 0.1x moles of H₂O. Therefore all H⁺ and OH⁻are completely used up and yield water molecules.
Then at this point the H⁺ and OH⁻ ions in the medium come from the weak dissociation of water. This is equivalent to 1 x 10⁻⁷M
pH = -log [H⁺]
pH = -log [10⁻⁷]
pH = 7
pH is therefore equals to 7 which means the solution is neutral
8 0
4 years ago
What is the name of the compound with the formula B2C14?​
agasfer [191]

Answer:

Diboron tetrachloride --->  B2Cl4

6 0
3 years ago
Which event may occur when ocean salinity increases?
Vladimir [108]
It’s d like 100000000% trust me
4 1
3 years ago
Read 2 more answers
Convert 5.00 moles of carbon to grams. Be sure to report your answer with the correct significant figures.
sergij07 [2.7K]

1 moles Carbon to grams = 12.0107 grams

2 moles Carbon to grams = 24.0214 grams

3 moles Carbon to grams = 36.0321 grams

4 moles Carbon to grams = 48.0428 grams

5 moles Carbon to grams = 60.0535 grams

6 moles Carbon to grams = 72.0642 grams

7 moles Carbon to grams = 84.0749 grams

8 moles Carbon to grams = 96.0856 grams

9 moles Carbon to grams = 108.0963 grams

10 moles Carbon to grams = 120.107 grams

8 0
3 years ago
Other questions:
  • Why does the skateboarder continue to move forward when he hits the trash?
    7·2 answers
  • _AlBr3+_K2SO4>_KBR+_Al2(SO4)3
    5·1 answer
  • Which of the following is a nonmetal?<br><br>a.iron <br> b. silver <br> c. oxygen <br> d. copper
    9·1 answer
  • Need a lil help here
    12·2 answers
  • Which process can affect the rate of carbon dioxide emissions or other greenhouse gas emissions by changing average temperatures
    12·1 answer
  • A container with a temperature T1 of 15°C is submerged in a bucket of hot water with a temperature T2 of 37°C. An identical cont
    6·1 answer
  • Which resulted from the study of chemistry?
    7·2 answers
  • Discuss the different observations that you would record during an investigation into the energy transformations of a lamp that
    12·1 answer
  • How many electrons does each atom have? What group is each in?
    8·1 answer
  • Ill give brainliest :D<br><br> how many grams of kcl are produced from 11.5 grams?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!