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3 years ago

2KI + Pb(NO3)2 → 2KNO3 + PbI2 Determine how many moles of KNO3 are created if 0.03 moles of KI are completely consumed.

Chemistry

2 answers:

ElenaW [278]3 years ago

6 0

2:2 so the same proportion
0,03

Ipatiy [6.2K]3 years ago

3 0

Answer: The moles of potassium nitrate produced is 0.03 moles

Explanation:

We are given:

Moles of potassium iodide = 0.03 moles

For the given chemical reaction:

$2KI+Pb(NO_3)_2\rightarrow 2KNO_3+PbI_2$

By Stoichiometry of the reaction:

2 moles of KI produces 2 moles of potassium nitrate

So, 0.03 moles of KI will produce = $\frac{2}{2}\times 0.03=0.03mol$ of potassium nitrate

Hence, the moles of potassium nitrate produced is 0.03 moles

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Nitrate salts (NO3), when heated, can produce nitrites (NO2) plus oxygen (O2). A sample of potassium nitrate is heated, and the

Lostsunrise [7]

Answer: a) 0.070 moles of oxygen were produced.

b) New pressure due to the oxygen gas is 2.4 atm

Explanation:

According to ideal gas equation:

$PV=nRT$

P = pressure of gas = 2.7 atm

V = Volume of gas = 700 ml = 0.7 L

n = number of moles = ?

R = gas constant = $0.0821Latm/Kmol$

T =temperature = 329 K

$n=\frac{PV}{RT}$

$n=\frac{2.7atm\times 0.7L}{0.0821 L atm/K mol\times 329K}=0.070moles$

Thus 0.070 moles of oxygen were produced.

When the 700 mL flask cools to a temperature of 293K.

$PV=nRT$

$P=\frac{nRT}{V}$

$P=\frac{0.070\times 0.0821\times 293}{0.7}$

$P=2.4atm$

The new pressure due to the oxygen gas is 2.4 atm

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4 years ago

A substance with two or more different types of atoms chemically bonded together is called....

Slav-nsk [51]

Answer:

Explanation:

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3 years ago

What properties do you need to know to find the density of an object?

belka [17]

Answer: you need to know the Mass (grams) of the object, and its Volume (measured in mL or cm³). Divide the mass by the volume in order to get an object's Density. How can you tell if something will float in water?

Explanation:

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3 years ago

Read 2 more answers

Use the following equation to answer questions 2 and 3. (Use the mole ratio for these problems only!)

MAVERICK [17]

Answer:

5.34 moles of $NO_2$ are required to produce 3.56 mol of $HNO_3$ .

0.83 moles of water react with 2.5 moles of $NO_2$ .

Explanation:

i) $3NO_2+H_2O\rightarrow 2HNO_3+NO$

Moles of $HNO_3$ we want to produce = 3.56 moles

According to reaction, 2 moles of $HNO_3$ are obtained from 3 moles of $NO_2$

Then 3.56 moles of $HNO_3$ will be obtained from :

$\frac{3}{2}\times 3.56 mol=5.34 mol$ of $HNO_3$

5.34 moles of $NO_2$ are required to produce 3.56 mol of $HNO_3$ .

ii)

Moles of $NO_2$ = 2.5 moles

According to reaction,3 moles of $NO_2$ reacts with 1 mole of $H_2O$ ,then 2.5 moles of $NO_2$ will react with :

$\frac{1}{3}\times 2.5 mol=0.83 mol$ of $H_2O$

0.83 moles of water react with 2.5 moles of $NO_2$ .

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3 years ago

Construct a three-step synthesis of trans-2-pentene from acetylene by dragging the appropriate formulas into the bins. Note that

adelina 88 [10]

Answer:

The three-step synthesis of trans-2-pentene from acetylene is as follows.

Step -1: Formation of higher order terminal alkyne on reaction with sodium acetylides with haloalkanes.

Step -2: Formation terminal alkyne to nonterminal alkynes.

Step -3: Formation of trans-pent - 2-pent-ene by reduction.

Explanation:

Synthesis of trans-pent-2-yne from ethyne takes place is mainly a three step synthesis which involves formation of higher order terminal alkyne on reaction with sodium acetylides with haloalkane. Second step involves the further alkylation of terminal alkynes to higher order nonterminal alkynes and the third step involves the formation of trans-2-ene by dissolving reduction method.

The chemical reaction of each step of chemical reactions is as follows.

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3 years ago