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Ber [7]
3 years ago
9

An important natural and metallic resource is ?

Chemistry
2 answers:
erastovalidia [21]3 years ago
8 0

The answer is D, Platinum. Hope this helps.

ss7ja [257]3 years ago
3 0
The answer is B.) Carbon
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Which of the following lists the relative strengths of the fundamental forces from strongest to weakest?
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Answer:

D. Strong nuclear force, electrostatic force, weak nuclear force, gravitational force

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Hydrochloric acid reacts with calcium to form hydrogen and calcium chloride. if 100 grams of hydrochloric acid reacts with 100 g
natita [175]
The balanced chemical reaction is:

2HCl + Ca = CaCl2 + H2

We are given the amount of the reactants to be used for the reaction. These values will be the starting point of our calculations.

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100 g Ca ( 1 mol Ca / 40.08 g ) = 2.08 mol Ca

From the reaction, the mole ratio of the reactants is 2:1 where every 2 moles of hydrochloric acid, 1 mole of calcium is required. Therefore, the limiting reactant for this case is calcium.
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3 years ago
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Irradiated PVC insulated jacket can withstand a maximum temperature of?
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The maximum temperature that a PVC can withstand is 130° C. Beyond this the PVC will melt. From the choices given the correct answer is option D. 130° C.
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zimovet [89]

Answer:

-6.4x10⁻¹⁹ C

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____P + ____Br2 ---> ____PBr3
mr Goodwill [35]
2 P + 3 Br2 —> 2 PBr3

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