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3 years ago

The actual yield of a certain reaction is 38.0 g, while the

Chemistry

1 answer:

pashok25 [27]3 years ago

5 0

Answer:

D. 76%

Explanation:

Percent yield=actual/theoretical * 100

38/50 * 100 = 76%

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Consider the reaction.

Stella [2.4K]

Answer:

when the rates of the forward and reverse reactions are equal

Explanation:

In a chemical system, the reaction reaches a dynamic equilibrium when the rate of formation of product equals the rate of formation of reactants. This implies that both the forward and revered(backwards) reaction are occurring at the same rate.

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3 years ago

A scientist eliminated all living organisms in a jar of soup by heating it. He then left the soup jar uncovered for some days. A

velikii [3]

Spores in the air or contamination through some sort of insect interaction. In an open system, there are billions of microbial agents floating around. With an open container containing a food source and time, the likelihood of contamination is nearly %100.

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3 years ago

Read 2 more answers

Write the balanced chemical reaction for the following nitrogen cycle reactions. These reactions are mediated by bacteria and pl

Leto [7]

Answer:

Nitrification is a biological process by which ammonia is oxidized to nitrites ( $NO_{2} ^{-}$ ) and then to nitrates ( $NO_{3} ^{-}$ ) by action of specialized bacteria in nature (such as nitrosomonas and nitrobacter).

Explanation:

This two-step process utilizes molecular atmospheric oxygen and ammonia and ammonium components of soil and nature.

(a.) Ammonia and ammonium compounds to nitrite

$NH_{4} ^{+} + O_{2}$ → $NO_{2} ^{-} + 4H^{+}$

$2NH_{3} ^{+} + 3O_{2}$ → $2NO_{2} ^{-} + 2H^{+} + 2H_{2} O$

(b.) Nitrite to nitrate

$2NO_{2} ^{-} + O_{2}$ → $2NO_{3} ^{-} + energy$

(c.) The reverse process involves reduction of nitrates to molecular nitrogen, called denitrification (with succinic acid in the equation below).

$4NO_{3} ^{-} + 10H^{+} + (CH_{2})_{2}(COOH)_{2}$ → $2N_{2} +4CO_{2} + 8 H_{2} O$

( $NO$ and $N_{2}O$ is an intermediate product in this process.)

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3 years ago

Mendeleev devised his periodic table by ordering the elements according to their atomic number.

marusya05 [52]

Answer:

False

Explanation:

The given statement is false.

Mendeleev devised periodic table by arranging elements in increasing order of their atomic masses.

According Mendeleev, physical and chemical properties of the elements are function of their atomic masses.

Henry Moseley arranged elements in increasing order of atomic number. Periodic table based on increasing order of atomic number is called modern periodic table.

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3 years ago

1. Which type of metal did Rutherford shoot alpha particles into?

DIA [1.3K]

1. Which type of metal did Rutherford shoot alpha particles into?
C)Gold

2.When Thomson held a positively charged plate near the cathode ray, the beam bent toward the plate. What conclusion can be drawn from this observation?
C)The beam was negatively charged.

3.)What was observed during Rutherford's experiment?
D)Most of the particles went through the foil, but some were deflected.

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3 years ago