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
soldi70 [24.7K]
3 years ago
5

I NEED HELP WITH BOTH QUESTIONS PLZZ!!!!!!!!

Chemistry
2 answers:
Norma-Jean [14]3 years ago
6 0

Answer:

<em>Volcanoes erupting</em>

<em>Sea levels rising, glaciers melting</em>

Explanation:

Ion kno bout the second one but I kno the first one is right

Hatshy [7]3 years ago
4 0
2 ,3,and 4 for the second I’m believe
You might be interested in
What are the common parts of a nucleotide?
a_sh-v [17]
1. Phosphate Group,Pentose sugar, and Nitrogen base
2. Not sure
3.These are found in RNA cytosine, guanine, adenine and uracil.
8 0
3 years ago
I need help identifying the type of reactions. Can anyone help?
Eddi Din [679]

Answer:

Reaction 5: Decomposition reaction.

Reaction 6: Single replacement reaction

Reaction 7: Combination reaction.

Reaction 8: Combustion reaction.

Explanation:

<u><em>Reaction 5:</em></u>    2KClO₃ → 2KCl + 3O₂.

  • It is a decomposition reaction.
  • A decomposition reaction is a type of chemical reaction in which a single compound breaks down into two or more elements or new compounds.
  • In this reaction: potassium chlorate decomposes into two single components (potassium chloride and oxygen).
  • So, it is a decomposition reaction.

<u><em>Reaction 6:</em></u> Zn + 2HCl → H₂ + ZnCl₂.

  • It is a single replacement reaction.
  • A single-replacement reaction, a single-displacement reaction, is a reaction by which one (or more) element(s) replaces an/other element(s) in a compound.
  • It is most often occur if element is more reactive than the other, thus giving a more stable product.
  • In this reaction, zinc metal (more active) displaces the hydrogen to form hydrogen gas and zinc chloride, a salt. Zinc reacts quickly with the acid to form bubbles of hydrogen.

<u><em>Reaction 7:</em></u> N₂O₅ + H₂O → 2HNO₃.

  • It is a combination "synthesis" reaction.
  • A synthesis reaction has two or more reactants and only one product.
  • In this reaction, dinitrogen pentoxide reacts with water to produce nitric acid.
  • So, it is considered as a synthetic "combination" reaction.

<u><em>Reaction 8:</em></u> 2C₂H₆ + 7O₂ →  4CO₂ + 6H₂O.

  • It is a combustion reaction.
  • A combustion reaction is a reaction where hydrocarbon alkane is completely burned in oxygen to produce water and carbon dioxide.
  • In this reaction 1.0 mole of ethane is burned to give 4.0 moles of carbon dioxide and 6.0 moles of water.
  • So, it is considered as a combustion reaction.
7 0
3 years ago
Read 2 more answers
A weighed piece of magnesium ribbon is added to a dried crucible, which is reweighed and heated in air to form the compound MgO.
olga nikolaevna [1]

Answer:

One of the errors for low percentage of magnesium could be because not all the magnesium may have reacted.

Explanation:

During the heating process, if the magnesium have not reacted completely, it can lead to low percentage of magnesium in the oxide formed. The product may still look a bit greyish rather than whitish after the heating process.

4 0
3 years ago
Balance the following equation____H2 + ____O2 → ____H2O
Snezhnost [94]

Answer:

2

Explanation:

Since it has to be 2H2+02→2H20 for it to be balanced.

3 0
2 years ago
What is the role of a consumer in the flow of energy through a food chain?
pogonyaev

Answer:

The role of consumers in an ecosystem is to obtain energy by feeding on other organisms and sometimes transfer energy to other consumers. Changes that affect consumers can impact other organisms within the ecosystem.

Explanation:

Hope this helped Mark BRAINLIEST!!!!

4 0
3 years ago
Other questions:
  • What can you conclude about the classification of krypton?
    8·1 answer
  • Help me out please this is my last attempt on the quiz
    8·2 answers
  • ​If you needed a 1.5 x 1 0-4 M solution of a compound that has a molar mass of 760 g/mol, what would it concentration be in part
    6·1 answer
  • A compound containing only c, h, and o, was extracted from the bark of the sassafras tree. The combustion of 43.9 mg produced 11
    5·1 answer
  • How to draw Hess' Cycle for this question ?
    7·1 answer
  • Which products would form if chlorine gas was bubbled through a solution of sodium bromide?
    10·2 answers
  • If 150 G of wood started Burning, and 30 G of wood ash was left behind, how many grams of CO2 to gas was released
    15·1 answer
  • Which molecule contains a nonpolar covalent bond?<br>A. HCI <br>B. F2 <br>C. CO2 <br>D. NH3​
    13·1 answer
  • Please help me, brainest if correct
    7·1 answer
  • Please help me i really am struggling
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!