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Fed [463]
3 years ago
14

balance the following reaction. a coefficient of "1" is understood. choose option "blank" for the correct answer if the coeffici

ent is "1". ___ Kcl + ___ Pb(NO3)2 -->___ Pbl2 + ___ KNO3
Chemistry
1 answer:
suter [353]3 years ago
3 0

Balanced chemical reaction: 2KCl + Pb(NO₃)₂ → PbCl₂ + 2KNO₃.

According to principle of mass conservation, number of atoms must be equal on both side of balanced chemical reaction.  

KCl is potassium chloride.

Pb(NO₃)₂ is lead(II) nitrate.

KNO₃ is potassium nitrate.

PbCl₂ is lead(II) chloride.

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A given solution has 42.5 g NaNO3 in 1500 mL of water. What is the molarity of this solution? Show your work, rounding the atomi
lutik1710 [3]

Explanation:

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A doctor recommends no more than 2.00 grams of sodium chloride (NaCl, 58.55 g/mole) per day. Potato chips have 250.0mg of NaCl p
Alexeev081 [22]

Answer : The number of servings of this potato chips eaten to consume 0.0230 moles of NaCl must be, 5.39

Explanation :

First we have to calculate the moles of NaCl.

\text{Moles of NaCl}=\frac{\text{Mass of NaCl}}{\text{Molar mass of NaCl}}

\text{Moles of NaCl}=\frac{250.0mg}{58.55g/mol}=\frac{0.250g}{58.55g/mol}=0.004269mol

Now we have to calculate the number of servings.

As, the number of serving in 0.004269 moles of NaCl = 1 serving

So, the number of serving in 0.0230 moles of NaCl = \frac{0.0230}{0.004269}=5.39 serving

Thus, the number of servings of this potato chips eaten to consume 0.0230 moles of NaCl must be, 5.39

8 0
3 years ago
What are some examples of things you expect to see when observing a chemical reaction?
just olya [345]
Change of color, change of temperature, change in the solubility, production of gas, production of light, electricity or precipitation. Release of heat. Explosion. Production of new compounds.
7 0
2 years ago
I need help, due in 30 mins
ICE Princess25 [194]

Answer:

1.Reaction rate is how fast a chemical reaction proceeds.

2.Nature of the reaction, Pressure factor

, Solvent, Catalyst and inhibitors.

3.Physical change is a temporary change. A chemical change is a permanent change. A Physical change affects only physical properties i.e. shape, size, etc.

4. One example of the effect of temperature is the use of lightsticks or glowsticks.

5.When the particle size of a fixed mass of a solid reactant becomes smaller, the total exposed surface area becomes larger, the rate of reaction increases. an example could be ice and water when the atoms are stuck together a solid but all over the place as a liquid.

6. Sometimes a reaction depends on catalysts to do their job. In that case, changing the concentration of the catalyst can speed up or slow down the reaction. For example, enzymes speed up biological reactions, and their concentration affects the rate of reaction.

7.A catalyst is a chemical substance that affects the rate of a chemical reaction by altering the activation energy required for the reaction to proceed. For example, a catalyst could cause a reaction between reactants to happen at a faster rate or at a lower temperature than would be possible without the catalyst.

Explanation:

I hope this helps have a great day! :)

7 0
2 years ago
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