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PIT_PIT [208]
3 years ago
7

The chart shows the eight most common elements on Earth. Seventy-five percent of Earth's crust is made up of just two elements -

oxygen and silicon. What is the next most common element?
Select one:
Fe,
Na,
Ca,
Al

Chemistry
2 answers:
zzz [600]3 years ago
4 0

Answer:

Al

Explanation:

it is the longest on the graph after the other 2

Monica [59]3 years ago
3 0
The third most common element is Aluminum (Al).
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olga55 [171]
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     calculation
find the  moles  of C7H8  used
moles = mass/molar mass

= 454 g/92  = 4.935  moles

balanced reacting  equation

C7H8  +3 HNO3  = C7H5N3O6  +3 H20
by  use of mole ratio between  C7H8  to  HNo3  which is  1:3  the moles of  HNO3  =4.935  x3 = 14.805  moles

mass of HNo3  =  moles  x molar mass
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part B

the  mass of  C7H5N3o6 = 2045.5 grams

calculate the moles of C7H8
= 829 g/92  g/mol  = 9.011  moles

by use of mole  ratio  between C7H8 to C7H5N3O6  which is  1:1  the moles of  C7H5N3O6  is also  = 9.011  moles

mass of  C7H5N3O6  is therefore  =  moles x molar mass

=9.011 x227  = 2045.5 grams
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4 years ago
What has alternating electronic and magnetic fields that travel in the form of a wave
STALIN [3.7K]

The magnate is the answer

8 0
3 years ago
How do i find the mole of something?
nikklg [1K]
To find the mole of a substance, you take the mass divided by the molar mass of that substance~
3 0
3 years ago
Read 2 more answers
How do atmospheric updrafts affect clouds?
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6 0
3 years ago
what is the best course of action if solid material remains in the flask after the heating step of recrystallization
lys-0071 [83]

Answer:

filter the hot mixture.

Explanation:

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7 0
3 years ago
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