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Elden [556K]
3 years ago
13

Tungsten carbide is becoming popular for making jewelry. A chemist is examining a sample of tungsten carbide (chemical formula W

C). What is the percent composition of tungsten in this compound? Round your answer to the nearest whole percent. The percent composition of tungsten is %

Chemistry
2 answers:
yulyashka [42]3 years ago
6 0

% composition of tungsten ( W) = 93.86%

solution is attached below

Studentka2010 [4]3 years ago
5 0

The percent composition of W in WC is 93.868 %.

MM of WC = 183.84 u + 12.01 u = 195.85 u

% W = Mass of W/Mass of WC × 100 % = 183.84 u/195.85 u × 100 %

= 93.868 %.



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Answer:

The correct answer is

B.

\Delta H=2(1072)+498 -4(799)

Explanation:

Enthalpy of reaction :

It is the amount of energy released/absorbed when one mole of the substance is formed from the reactant at a constant pressure.

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units = \frac{kJ}{mole}

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