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JulsSmile [24]
3 years ago
14

An (blank) is an abbreviation for the name of an element and usualy has eighter one or two letters

Chemistry
1 answer:
nata0808 [166]3 years ago
5 0
The <span>Chemical Symbol is the Abbreviation for the name of an element.</span>
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Answer is A)<span> troposphere</span>
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PLEASE HELP!!!
trasher [3.6K]

Answer:

(a) oxygen

(b) 154g (to 3sf)

(c) 79.9% (to 3sf)

Explanation:

mass (g) = moles × Mr/Ar

note: eqn means chemical equation

(a)

moles of P = 84.1 ÷ 30.973 = 2.7152 moles

moles of O2 = 85÷2(16) = 2.65625 moles

Assuming all the moles of P is used up,

moles of O2 / moles of phosphorus = 5/4 (according to balanced chemical eqn)

moles of O2 required = 5/4 × 2.7152moles = 3.394 moles (more than supplied which is 2.65625moles)

therefore there is insufficient moles of O2 and the limiting reactant is oxygen.

(b)

moles of P2O5 produced

= 2/5 (according to eqn) × 2.7152

= 1.08608moles

mass of P2O5 produced

= 1.08608 × [ 2(30.973) + 5(16) ]

= 154.164g

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(c)

% yield = actual/theoretical yield × 100%

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2 years ago
Plzzzzz help me to solve this question.​
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Answer:

Explanation:

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Answer:

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Answer: The correct option is Current W flows at a higher rate than Current Z.

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