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
Mazyrski [523]
3 years ago
10

A _____ is a crack in Earth's crust where lava comes out. A. crater B. fissure C. caldera D. volcano

Chemistry
2 answers:
Gennadij [26K]3 years ago
4 0
A(volcano) is a crack in the Earth's crust where lava comes out. D should be the correct answer
In-s [12.5K]3 years ago
3 0
I think it is a crater

You might be interested in
PLEASE ANSWER NEED BY MIDNIGHT TONIGHT!!!!!!
maksim [4K]

The equation for carbon-14 emission by Radium-223 nuclei is given below:

^{223}_{88}Ra \rightarrow\: ^{209}_{82}Pb + \:^{14}_{6}C

<h3>What is radioactivity?</h3>

Radioactivity is the spontaneous decay of a substance with emission of radiation.

The equation for carbon-14 emission by Radium-223 nuclei is given below:

^{223}_{88}Ra \rightarrow\: ^{209}_{82}Pb + \:^{14}_{6}C

In conclusion, the emission of carbon-14 by Radium-223 nuclei produces Lead-209 nuclei.

Learn more about radioactivity at: brainly.com/question/3603596

#SPJ1

5 0
1 year ago
Why melting point of Fe in blast furnace is lower than ellingham?
Kaylis [27]

Answer:

Because they are different oxides.

Explanation:

In both processes they are involve Iron Oxides, but in the case of Ellingham diagrams, it is consider the Iron in combination with oxygen to form FeO, so the melting point is around 1600  ºC. In the case of blast furnace, the Fe that is present in the ores, are primary the hematite (Fe2O3) and the magnetite (Fe3O4).

6 0
3 years ago
The addition of phosphate to a chemical compound is called A. glycolysis. B. oxidation. C. reduction. D. phosphorylation.
stich3 [128]

Answer:

Option (D)

Explanation:

Phosphorylation can be simply defined as the addition of a phosphate group to an organic and inorganic molecule. This process helps in regulating the processes that occur in the cells. It leads to the growth and development of cells and this process is efficiently carried out with the help of enzymes like kinase. It also plays an important role in transferring the signals within the cells, synthesis, and functioning of proteins within the cells, and storing as well as releasing of energy.

Thus, the correct answer is option (D).

5 0
3 years ago
C + 2H2 -&gt; CH4
ankoles [38]

Answer:

<u>C) 4</u>

Explanation:

<u>The reaction</u> :

  • C (s) + 2H₂ (g) ⇒ CH₄ (g)

       12g      4g             16g

Hence, based on this we can say that : <u>2 moles of hydrogen gas are needed to produce 16g of methane.</u>

<u />

<u>For 32g of methane</u>

  • Number of moles of H₂ = 32/16 × 2
  • Number of moles of H₂ = <u>4</u>
4 0
2 years ago
Read 2 more answers
I’m taking a test!! Please help!!
777dan777 [17]

Answer:

I am not really sure, but I think Fr.

Explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • Need some help with these problems
    11·1 answer
  • Use the scenario to answer the question
    8·2 answers
  • Which features do sound waves have that ocean and light waves do not? Check all that apply.
    10·2 answers
  • How are elements in the nitrogen family (Group 15) similar to each other?
    7·1 answer
  • What causes weather?
    14·1 answer
  • Ethanol absorbs more energy than water because it has a lower heat capacity <br><br> True or false?
    10·1 answer
  • Cual es la masa atomica del hidrogeno
    11·1 answer
  • What is the lowest energy level that contains d orbitals?<br> O A. 4<br> O B. 3<br> O C. 2<br> D. 1
    12·1 answer
  • C3H8 + 5O2 → 3CO2+ 4H2O, if 5.75L of oxygen are consumed in the above reaction, how many L of carbon dioxide are produced?
    15·1 answer
  • 6) Which of the following would travel the farthest in column chromatography?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!