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2 years ago

How do pumice and basalt form?

Chemistry

2 answers:

ozzi2 years ago

6 0

Answer:

"If magma with the same composition reaches the surface, it forms extrusive rocks such as rhyolite and pumice. Basalt is an extrusive igneous rock that forms the ocean floor. ... Also, water and wind break apart and carry away surface rocks. Then deeper rocks are uncovered at the surface."

Explanation:

FinnZ [79.3K]2 years ago

3 0

Answer:

Basalt forms when lava cools quickly at the surface. This quick cooling rate results in very small mineral grains. Pumice is formed when volcanoes erupt explosively. It comes from the same kind of magma which would form granite or rhyolite, that is, a magma that contains lots of silica (quartz). Magma with lots of silica is usually thick and sticky

Explanation:

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Rate law equation The rate of a chemical reaction depends on the concentrations of the reactants. For the general reaction betwe

shusha [124]

Answer: The reaction order with respect to A is m

Explanation:

Order of the reaction is defined as the sum of the concentration of terms on which the rate of the reaction actually depends. It is the sum of the exponents of the molar concentration in the rate law expression.

Elementary reactions are defined as the reactions for which the order of the reaction is same as its molecularity and order with respect to each reactant is equal to its stoichiometric coefficient as represented in the balanced chemical reaction.

For the given reaction:

$aA+bB\rightleftharpoons cC+dD$

$Rate=k[A]^m[B]^n$

In this equation, the order with respect to each reactant is not equal to its stoichiometric coefficient which is represented in the balanced chemical reaction.

Hence, this is not considered as an elementary reaction.

Order with respect to A = m

Order with respect to B = n

Overall order = m+n

Thus order with respect to A is m.

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2 years ago

What is the maximum number of electrons in the first electron shell, closest to the nucleus?

Ymorist [56]

The correct answer is B. 2

6 0

3 years ago

Read 2 more answers

For the Earth's atmosphere, section number two in the pie graph BEST represents the percentage of A) argon B) oxygen C) nitrogen

larisa86 [58]

-Oxygen

According to Google these are the percentages of the Earths Atmosphere

1 78% - Nitrogen

2 21% - Oxygen

3 0.9% - Argon

4 0.3 - Carbon Dioxide with very small percentage of other elements.

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3 years ago

Two different compounds are formed by the elements nitrogen and oxygen. The first compound, compound P1, contains 64.17% by mass

xz_007 [3.2K]

Answer:

Explanation:

To solve the problem, we must know the kind of compounds we are dealing with.

For the first compound, P1 and second compound P2:

N O N O

Mass percent 64.17 35.73 47.23 52.79

Atomic mass 14 16 14 16

Number of

moles 64.17/14 35.73/16 47.23/14 52.79/16

4.58 2.23 3.37 3.30

Simplest

ratio 4.58/2.23 2.23/2.23 3.37/3.30 3.3/3.3

2 1 1 1

P1 compound is N₂O

P2 compound is NO

These are the compounds,

In N₂O = 28:16

NO = 14:16

This is the ratio of nitrogen to a fixed mass of oxygen for the two compounds.

7 0

2 years ago

If 6.0 x 10^23 atoms of aluminum weigh 27 g, calculate the mass of 1 atom of aluminum in picograms.

Georgia [21]

Answer:

$4.5 \times 10^{ - 11}$ picograms

Explanation:

Please see attached picture for full solution.

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2 years ago