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
MrMuchimi
3 years ago
7

What happens immedialety happens before a volcano erupts?

Chemistry
1 answer:
Fed [463]3 years ago
7 0
The correct answer is C) Expanding gases push magma through the pipe. The mantle is already made of magma, the magma cools when the volcano has already erupted, and the temperature does not decrease in the chamber.
You might be interested in
How many molecules of oxygen are produced when a sample of 38.9 g of water is decomposed by electricity?
statuscvo [17]

Answer:

A) 6.5\times 10^{23}\ \text{molecules}

Explanation:

m = Mass of water = 38.9

M = Molar mass of water = 18 g/mol

N_A = Avogadro's number = 6.022\times 10^{23}\ \text{mol}^{-1}

The reaction of electrolysis would be

2H_2O(l)\rightarrow 2H_2(g)+O_2(g)

Number of moles of H_2O

n=\dfrac{m}{M}\\\Rightarrow n=\dfrac{38.9}{18}\ \text{mol}

From the reaction it can be seen that 2 moles of H_2O gives 1 mole of O_2

So, number of moles of O_2 produced is

\dfrac{38.9}{18}\times \dfrac{1}{2}=1.081\ \text{mol}

Number of molecules

1.081N_A=1.081\times 6.022\times 10^{23}\\ =6.5\times 10^{23}

So, 6.5\times 10^{23}\ \text{molecules} of oxygen is produced.

8 0
3 years ago
The maximum amount of solute that dissolves in a given amount of solvent and forms a stable solution is called the
denis23 [38]

Answer:

The maximum amount of solute that dissolves in a given amount of solvent and forms a stable solution is called the solubility of the solute

Explanation:

The maximum amount of solute that could be dissolved in a given amount of solvent is the solubility of the solute. It is the saturated solution's concentration from where a saturated solution can be defined as the one which already contains the maximum quantity of dissolved solute at a specified temperature, while an unsaturated solution is one with a capacity to dissolve more solutes

3 0
3 years ago
Which of the following will form a solution? (Select all that apply.)
SSSSS [86.1K]

Answer:

sand and water

Explanation:

when u mix these both it will become like a paste

4 0
2 years ago
Water molecules are composed of _________
Nataly [62]
Everything is made of atoms. An atom is the smallest particle of an element, like oxygen or hydrogen. Atoms join together to form molecules. A water molecule has three atoms: two hydrogen (H) atoms and one oxygen (O) atom.
5 0
3 years ago
A scientist has two samples of gas: The first sample contains one mole of argon atoms and has a mass of 39.948 g; the second sam
V125BC [204]

There are 6.022 × 10²³ atoms in 39.948 g of argon and 4.0026 g of helium.

Explanation:

39.945 g/mole is the molar mass of argon so 39.948 g of argon are equal to 1 mole of argon.

4.0026 g/mole is the molar mass of helium so 4.0026 g of helium are equal to 1 mole of helium.

We know that Avogadro's number tell us the number of particles in 1 mole of substance which is 6.022 × 10²³.

So in 39.948 g of argon and 4.0026 g of helium contains the same number of atoms, 6.022 × 10²³.

Learn more about:

Avogadro's number

brainly.com/question/14148121

brainly.com/question/1445383

brainly.com/question/1528951

#learnwithBrainly

4 0
3 years ago
Other questions:
  • Hydrogen bonds form between molecules containing _________ bonds; the hydrogen bond is between a hydrogen atom of one molecule a
    6·1 answer
  • What phase change is endothermic
    12·2 answers
  • 8.41 x 10 to the -7 grams to microgram
    14·1 answer
  • Calculate the following to the correct number of significant figures 0.0041 cm x 2.00 cm
    7·1 answer
  • A certain reaction has an activation energy of 28.90 kJ / mol. At what Kelvin temperature will the reaction proceed 5.00 times f
    8·1 answer
  • Can you please help me
    14·1 answer
  • What must be done to the following half-reactions before they can be added together?Mn (s) → Mn 2+ (aq) + 2e − Fe 3+ (aq) + 3e −
    6·1 answer
  • You are given a substance that is equally soluble in water and hexane, what is the kd
    12·1 answer
  • How many products are produced in the following equation.
    8·1 answer
  • How many molecules are there in 42gms of Na?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!