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3 years ago

11

HELPPP how many Hg grams is .25 moles of CaO??

1 answer:

Eva8 [605]3 years ago

6 0

15.5 grams
is your anwser

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What is the element present for copper

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Copper is an brown-orange color which it's atomic number is 29. With high thermal and electricity conductivity with it's smooth surface.

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Which is a chemical property of hydrogen?

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Explanation:

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9- Which pair of formulae represents two alkanes? (1 mark)

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Answer:

A) CH4 and C8H18

Explanation:

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This means for every number of Carbon (C) atoms, there are twice as many Hydrogen (H) atoms with an additional two added onto that.

Therefore, if there is one Carbon Atom, and we multiply that by two, and then add an additional two, we get 4 Hydrogen atoms, so CH4, which is our first Formulae

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2 H2 + 2 NO → N2 + 2 H2O the observed rate expression, under some conditions, is: rate = k[NO]2 Which of the following mechanism

guapka [62]

Explanation:

Rate law is defined as the rate of a reaction is directly proportional to the concentration of reactants at constant temperature.

$Rate \propto [\text{concentration of reactant}]^{n}$

= k $[\text{concentration of reactant}]^{n}$

where, k = rate constant

n = order of reaction

For the given reaction, $2H_{2} + 2NO \rightarrow N_{2} + 2H_{2}O$

Hence, its rate will be as follows.

Rate = $k[H_{2}][NO]$

Also, it is known that slowest step in a chemical reaction is the rate determining step.

Hence, for the given rate law correct reaction is as follows.

Step 1 : $H_{2} + NO \rightarrow N + H_{2}O$ (slow)

Balancing this equation it becomes $H_{2} + 2NO \rightarrow N_{2}O + H_{2}O$ (slow)

Step 2: $N_{2}O + H_{2} \rightarrow N_{2} + H_{2}O$ (fast)

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3 years ago