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kakasveta [241]
3 years ago
13

What are the three main classifications of rocks?

Chemistry
2 answers:
kykrilka [37]3 years ago
4 0
Igneous, metamorphic, and sedimentary are the three classifications

irga5000 [103]3 years ago
3 0

Answer:

Three main classifications of rocks are

  • sedimentary rock
  • metamorphic rock
  • igneous rock

Explanation:

Three main classifications of rocks are:

  • Sedimentary rocks are formed from the shells, sand particles and pebbles.

Example of Sedimentary rock limestone.

  • Igneous rocks are formed by the crystallization and solidification of magma.

Example of Igneous rock basalt.

  • Metamorphic rocks are formed when the igneous rock or sedimentary rock they are exposed to high temperature and pressure below the Earth's surface.

Example of Metamorphic rock is marble.

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Which of the following compounds are held together by ionic bonds? Select all that apply.
Sergeu [11.5K]

Answer:

Explanation:

All of above except carbon dioxide

7 0
3 years ago
What mass of Hg will occupy a volume of 75.0 mL?
k0ka [10]
75.0 mL in liters:

75.0 / 1000 => 0.075 L

1 mole -------------------- 22.4 L ( at STP)
( moles Hg) ------------- 0.075 L

moles Hg = 0.075 x 1 / 22.4

moles = 0.075 / 22.4

= 0.00334 moles of Hg

Hg => 200.59 u

1 mole Hg ----------------- 200.59 g
<span>0.00334 moles Hg ----- ( mass Hg )
</span>
mass Hg = 200.59 x 0.00334 / 1

mass Hg = 0.6699 / 1

= 0.6699 g of Hg




7 0
3 years ago
Which of the following is not a part of all cells
ivolga24 [154]

it's B Cell wall

please mark me as brainliest

8 0
3 years ago
Does anyone know the answer to these?
Rashid [163]

Answer:

The answer to your question is below

Explanation:

Data

mass of CaCO₃ = 155 g

mass of HCl = 250 g

mass of CaCl₂ = 142 g

reactants = CaCO₃ + HCl

products = CaCl₂ + CO₂ + H₂O

1.- Balanced chemical reaction

             CaCO₃ + 2HCl   ⇒    CaCl₂ + CO₂ + H₂O

2.- Limiting reactant

molar mass of CaCO₃ = 40 + 12 + 48 = 100 g

molar mass of HCl = 2[1 + 35.5 ] = 73 g

theoretical proportion CaCO₃ /HCl = 100 / 73 = 1.37

experimental proportion CaCO₃ /HCl = 155 / 250 = 0.62

As the experimental proportion was lower than the theoretical proportion the limiting reactant is CaCO₃

3.-

Calculate the molar mass of CaCl₂

CaCl₂ = 40 + 71 = 111 g

          100 g of CaCO₃ ------------------ 111 g of CaCl₂

           155 g of CaCO₃ ----------------- x

               x = (155 x 111) / 100

               x = 17205 / 100

              x = 172.05 g of CaCl₂

4.- percent yield

Percent yield = 142 / 172.05 x 100 = 82.5 %

5.- Excess reactant

    100 g of CaCO₃  -------------------- 73 g of HCl

     155 g of caCO₃ ------------------- x

           x = (155 x 73)/100

           x = 133.15 g

Mass of HCl = 250 - 133.15

                    = 136.9 g

4 0
3 years ago
What elements make up water?
Sveta_85 [38]
Water molecules are made of hydrogen atoms and one oxygen atom.

Hope this helped!
5 0
3 years ago
Read 2 more answers
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