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sp2606 [1]
3 years ago
9

Balance the following equation. Choose "blank" if no coefficient other than 1 is needed.

Chemistry
2 answers:
Ann [662]3 years ago
8 0

Explanation:

Pb+2 AgNO3=Pb(NO3)2+2Ag

Mrac [35]3 years ago
8 0

Answer:

Pb + 2AgNO3 --->   Pb(NO3)2 + 2Ag

Explanation:

The lead Pb2+ ion has a valency of 2 and therefore combines with 2 nitrate ions (NO3)-..

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Please help
KonstantinChe [14]

Answer:  There are 0.5 grams of barium sulfate are present in 250 of 2.0 M BaSO_{4} solution.

Explanation:

Given: Molarity of solution = 2.0 M

Volume of solution = 250 mL

Convert mL int L as follows.

1 mL = 0.001 L\\250 mL = 250 mL \times \frac{0.001 L}{1 mL}\\= 0.25 L

Molarity is the number of moles of solute present in liter of solution. Hence, molarity of the given BaSO_{4} solution is as follows.

Molarity = \frac{mass}{Volume (in L)}\\2.0 M = \frac{mass}{0.25 L}\\mass = 0.5 g

Thus, we can conclude that there are 0.5 grams of barium sulfate are present in 250 of 2.0 M BaSO_{4} solution.

7 0
3 years ago
Given the reaction: 2na + 2h2o → 2na+ + 2oh− + h2
Neporo4naja [7]

Answer:

\large \boxed{\text{3. Na}}

Explanation:

We can use oxidation numbers to decide which substance is reduced.  

\rm 2\stackrel{\hbox{0}}{\hbox{Na}} + 2\stackrel{\hbox{+1}}{\hbox{ H}_{2}}\stackrel{\hbox{-2}}{\hbox{O}}\longrightarrow \rm 2\stackrel{\hbox{+1}}{\hbox{Na}^{+}} + 2\stackrel{\hbox{-2}}{\hbox{O}}\stackrel{\hbox{+1}}{\hbox{H}^{-}} + \stackrel{\hbox{0}}{\hbox{H}_{2}}

The oxidation number of Na changes from 0 in Na to +1 in Na⁺.

The oxidation number of H changes from +1 in H₂O to 0 in H₂.

\text{An increase in oxidation number is oxidation, so $\large \boxed{\textbf{Na}}$ is the substance oxidized.}

1 and 4 are wrong because H₂ and Na⁺ are products.

2. is wrong because there is no H⁺ to be oxidized or reduced.

3 0
3 years ago
What does resonance result in?
Tcecarenko [31]

louder sounds

Explanation:

Resonance results in louder sounds.

Resonance is a phenomenon that produces a large vibration as a result of smaller vibration that causes the resonating body to vibrate at its own natural frequency.

Resonance results in sound amplification and causes louder sounds. Increasing vibration results in the production of a louder sound.

Learn more:

Resonance in chemistry brainly.com/question/9422880

#learnwithBrainly

3 0
4 years ago
Which of the following best describes where cellular respiration occurs?
Illusion [34]

Answer:

In every body cell

Explanation:

4 0
3 years ago
Read 2 more answers
An increase in temperature affect the reaction rate by
deff fn [24]

Answer:

It leads to increase in temperature

Explanation:

An increase in temperature leads to increase in reaction rate. As the temperature increase, the average kinetic energy of each of the components is increased which causes the components of the reaction of collide with each other.

4 0
4 years ago
Read 2 more answers
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