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NeX [460]
3 years ago
10

What material would make the best heating element for an electric range?

Chemistry
2 answers:
AnnZ [28]3 years ago
8 0
A) a resistor, which converts some electric energy to thermal energy.
OverLord2011 [107]3 years ago
6 0
A. a resistor, which converts some electric energy to thermal energy.
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Find the weight of HNO_3 present in 20ml, 0.30 N
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Answer:

mass of HNO₃ = 0.378 g

Explanation:

Normality = Molarity * number of equivalents

Molarity = Normality/number of equivalents

normality of HNO₃ = 0.30 N, Volume = 20 mL

HNO₃ ionizes in the following way:

HNO₃(aq) ----> H⁺ + NO₃⁻

Therefore, number of equivalents for HNO₃ is 1

molarity of HNO₃ = 0.30/1 =0.30 mol/dm³

Using the formula, molarity = number of moles/volume in liters

number of moles = molarity * volume

Number of moles of HNO₃ = 0.30 mol/dm³ * 20ml * 1 dm³ /1000 mL

number of moles = 0.006 moles

From the formula, mass = number of moles * molar mass

molar mass of HNO₃ = 63.0 g/mol

mass = 0.006 * 63

mass of HNO₃ = 0.378 g

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