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Leokris [45]
3 years ago
9

Which of the following statements is true? Coal, oil, and natural gas are renewable energy sources. A mineral's hardness is its

least informative property. Conglomerates are formed from regional metamorphism. The rock cycle is driven by the movement of tectonic plates.
Chemistry
2 answers:
DanielleElmas [232]3 years ago
7 0

Answer:

The rock cycle is driven by the movement of tectonic plates.

Explanation:

AleksandrR [38]3 years ago
6 0
I believe the correct answer would be the last option. The rock cycle is driven by the movement of tectonic plates. The rock cycle describes the different changes that a rock undergoes as a result of the geological processes that happens in the Earth and the movement of the plate tectonics is one of these.
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1. Using the balanced equation, answer the following questions:
nalin [4]

Answer:

                     a)  2.53 × 10²³ molecules of O₂

                     b)  31.90 g of KCl

Explanation:

                  The balance chemical equation for given decomposition reaction is as follow;

                                   2 KClO₃ → 2 KCl + 3 O₂

<h3>Part 1:</h3>

Step 1: <u>Calculate Moles for given amount of KClO₃;</u>

                    Moles  =  Mass / M.Mass

                    Moles  =  34.35 g / 122.55 g/mol

                    Moles  =  0.280 moles of KClO₃

Step 2: <u>Find out  moles of O₂ produced;</u>

According to eq,

                  2 moles of KClO₃ produces  =  3 moles of O₂

So,

            0.280 moles of KClO₃ will produce  =  X moles of O₂

Solving for X,

                    X  =  0.280 mol × 3 mol / 2 mol

                     X =  0.42 moles of O₂

Step 3: <u>Calculate No. of Molecules of O₂ as,</u>

No. of Molecules  =  Moles × 6.022 × 10²³

No. of Molecules  =  0.42 mol × 6.022 × 10²³ molecules/mol

No. of Molecules  =  2.53 × 10²³ molecules of O₂

<h3>Part 2:</h3>

Step 1: <u>Calculate Moles for given amount of KClO₃;</u>

                    Moles  =  Mass / M.Mass

                    Moles  =  52.53 g / 122.55 g/mol

                    Moles  =  0.428 moles of KClO₃

Step 2: <u>Find out  moles of KCl produced;</u>

According to eq,

                  2 moles of KClO₃ produces  =  2 moles of KCl

So,

            0.428 moles of KClO₃ will produce  =  X moles of KCl

Solving for X,

                    X  =  0.428 mol × 2 mol / 2 mol

                     X =  0.428 moles of KCl

Step 3: <u>Calculate Mass of KCl as;</u>

                         Mass  =  Moles × M.Mass

                         Mass  =  0.428 mol × 74.55 g/mol

                         Mass  =  31.90 g of KCl

6 0
3 years ago
Which of the following is a heterogeneous mixture
jeka57 [31]
Soil. 
Heterogeneous means is can be separated and soil can be taken apart and separated according to its contents. (Rocks, dirt, grass). <span />
7 0
3 years ago
Theoretically how many moles of carbonic acid will be produced by the 3.00 g sample of NaHCO3
yaroslaw [1]
NaHCO3 = 22.99 + 1.008 + 16(3) = 83.99 g/mol 
<span>Na = 22.99g/83.99 g weight of molecule =.2727 or 27.27% </span>
<span>3.0 g* .2727 = 0.8211 grams of sodium in sample of NaHCO3 

</span><span>0.8211 grams Na + 1.266 grams Cl = 2.087 grams</span>
4 0
3 years ago
Read 2 more answers
1. Calculate the average atomic mass of rubidium. Rubidium has two isotopes, 85Rb and 87Rb. 85Rb has an atomic mass of 84.912 am
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Just use labels I’m lazy

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Identify the weakest bond. identify the weakest bond. triple covalent bond single covalent bond double covalent bond all of the
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The weakest bond is a single covalent bond.
5 0
3 years ago
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