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Slav-nsk [51]
3 years ago
5

What mass of O2 is needed to produce 4.5 moles of CO2?

Chemistry
1 answer:
Ahat [919]3 years ago
4 0

Answer:

Explanation:

45

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An unknown aqueous metal analysis yielded a detector response of 0.255. When 1.00 mL of a solution containing 100.0 ppm of the m
AVprozaik [17]

Answer:

1.022ppm is the unknown concentration of the metal

Explanation:

Based on Lambert-Beer law, the increasing in signal of a detector is directly proportional to its concentration.

The unknown concentration (X) produces a signal of 0.255

99mL * X + 1mL * 100ppm / 100mL produces a signal of 0.502

0.99X + 1ppm produce 0.502, thus, X is:

0.255 * (0.99X + 1 / 0.502) =

X = 0.503X + 0.508

0.497X = 0.508

X =

1.022ppm is the unknown concentration of the metal

3 0
2 years ago
Finish the following word equation.<br><br> calcium + nitric acid →
Dafna1 [17]
HNO3 + Ca —-> H2O + N20 + Ca(NO3)2
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2 years ago
How many compounds can I make with sodium, hydrogen, oxygen?
Natalka [10]

Answer:

маны

Explanation:

6 0
2 years ago
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Using the diagram , what is the intersection of plan ABCD and GC?
Oduvanchick [21]

Answer:

C

Explanation:

When a line segment and a plane intersect, they intersect at a point. They both coincide on point C

7 0
2 years ago
Which of the following statements is typically true for a catalyst? I. The concentration of the catalyst will go down as a react
gladu [14]

Answer: II. The catalyst provides a new pathway in the reaction mechanism.

III. The catalyst speeds up the reaction.

Explanation:

Activation energy is the extra energy that must be supplied to reactants in order to cross the energy barrier and thus convert to products.

A catalyst is a substance which increases the rate of a reaction by taking the reaction through a different path which involves lower activation energy and thus more molecules can cross the energy barrier and more molecules convert to products.

The catalyst itself does not take part in the chemical reaction and gets regenerated as such at the end of the reaction without getting consumed.

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2 years ago
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