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2 years ago

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In the chemical reaction below, sodium (Na) and chlorine (Cl) combine to form sodium chloride (NaCl). 2Na + Cl2 → 2NaCl If the c

ombined mass of the starting reactants is 50 grams, then the mass of sodium chloride formed once the reaction has reached completion A. will be exactly 50 grams. B. will be exactly 100 grams. C. will be between 50 and 100 grams. D. will be less than 50 grams.

2 answers:

Vikentia [17]2 years ago

4 0

A. Exactly 50 grams matter cant be created or destroyed

Olin [163]2 years ago

4 0

Answer:

Exactly 50 grams

Explanation:

The law of conservation of mass states that mass is neither created nor destroyed in a chemical or physical change—it is only rearranged. The combined mass of the starting reactants is exactly 50 grams. So, the mass of sodium chloride formed during the chemical reaction will be exactly 50 grams.

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Answer:

Explanation:

Given

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3 years ago

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2 years ago

A coil has 400 turns and self-inductance 7.50 mH. The current in the coil varies with time according to i = 1680 mA2 cos [πt/(0.

zhannawk [14.2K]

Answer:

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(b) 0.0126 Wb

(c) 0.0493 V

Solution:

As per the question:

No. of turns in the coil, N = 400 turns

Self Inductance of the coil, L = 7.50 mH = $7.50\times 10^{- 3}\ H$

Current in the coil, i = $1680cos[\frac{\pi t}{0.0250}]$ A

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We know that maximum emf induced in the coil is given by:

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$e = - 7.50\times 10^{- 3}\times \frac{\pi}{0.0250}\times \frac{d}{dt}(1680)sin[\frac{\pi t}{0.0250}]$

For maximum emf, $sin\theta$ should be maximum, i.e., 1

Now, the magnitude of the maximum emf is given by:

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$e = e_{o}sin{\pi t}{0.0250}$

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