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3 years ago

How many molecules of carbon monoxide, CO, are there in 1.448 moles of carbon monoxide?

Chemistry

1 answer:

defon3 years ago

5 0

Answer:

Explanation:

# molecules = Avogadro's num x num of moles

number of CO 6.02x10 23 x n CO

= 6.02x10 23 ) x 1.044= 6.28x 10 23 molecules

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Watch the animation and observe the titration process of a standard 0.100 M sodium hydroxide solution with 50.0 \rm ml of a 0.10

yuradex [85]

Answer:

Answers are in the explanation

Explanation:

a. The statments are:

The titration process is based on a chemical reaction. TRUE. A titration is the chemical reaction between an acid and a base.

The pH of the solution at the equivalence point is 7. TRUE. In a titration of strong acid with strong base the equivalence point is 7

At the endpoint, the pH of solution is 10 and the color of solution is pink. FALSE. The endpoint in a strong acid - strong base titrationmust be near to equivalence point at pH = 7.

At the beginning of the titration process, the pH of the solution increases rapidly. FALSE. At beginning of a titration, the pH of the solution increases slowly.

The chemical reaction involved in an acid-base titration is a neutralization reaction. TRUE. In the reaction, you are neutralizing an acid (HCl) with a base (NaOH)

Before any base is added to the solution, the pH of the solution is high. FALSE. The addition of a base increases pH that is, in the beginning, low.

In a titration process, the endpoint is reached before the equivalence point. FALSE. In a titration process, the endpoint is reached in the equivalence point

The pH of the solution changes very slowly at the equivalence point. FALSE. At the equivalence point, the pH changes rapidly.

b. For the reaction

NaOH + HCl → H₂O + NaCl

As the reaction is 1:1 and molarity of both solutions are the same, additions < 100mL of NaOH will stay before the equivalence point, equivalence point will be in 100mL and additions > 100mL of NaOH will stay after the equivalence point.

The conditions are:

10.0mL of 1.00 M NaOH before the equivalence point

150 mL of 1.00 M NaOH after the equivalence point

5.00 mL of 1.00 M NaOH before the equivalence point

50.0 mL of 1.00 M NaOH before the equivalence point

200 mL of 1.00 M NaOH after the equivalence point

I hope it helps!

7 0

3 years ago

Read 2 more answers

The balanced combustion reaction for C 6 H 6 C6H6 is 2 C 6 H 6 ( l ) + 15 O 2 ( g ) ⟶ 12 CO 2 ( g ) + 6 H 2 O ( l ) + 6542 kJ 2C

Lana71 [14]

Explanation:

First, we will calculate the molar mass of $C_{6}H_{6}$ as follows.

Molar mass of $C_{6}H_{6}$ = $6 \times 12 + 6 \times 1$

= 78 g/mol

So, when 2 mol of $C_{2}H{6}$ burns, then heat produced = 6542 KJ

Hence, this means that 2 molecules of $C_{6}H{6}$ are equal to $78 \times 2 = 156 g$ of $C_{6}H_{6}$ burns, heat produced = 6542 KJ

Therefore, heat produced by burning 5.5 g of $C_{6}H{6}$ =

$6542 kJ \times \frac{5.5 g}{156 g}$

= 228.97 kJ

= 228970 J (as 1 kJ = 1000 J)

It if given that for water, m = 5691 g

And, we know that specific heat capacity of water is 4.186 $J/g^{o}C$ .

As, Q = $m \times C \times (T_{f} - T_{i})$

228970 J = $5691 g \times 4.184 J/g^{o}C \times (T_{f} - 21)
^{o}C$

$T_{f} - 21^{o}C = 9.616^{o}C$

$T_{f} = 30.6^{o}C$

Thus, we can conclude that the final temperature of the water is $30.6^{o}C$ .

4 0

3 years ago

Which force acts an an object to move it from rest or a constant, straight-line motion?

maxonik [38]

Answer:

C. Unbalanced

Explanation:

A force which can change the state of an object by changing it's speed, position or direction of motion is known as an unbalanced force. It is the resultant of all forces which are acting on a body and causing a change in the state of rest of motion of the body.

Assume a box is resting on the floor. The forces acting on the box in the rest are Normal (by the ground on the box) in upward direction and gravitational force Mg (due to gravity). Although these two forces are acting on the box, it is still in rest because these forces are balanced to each other. When we pull or push the box by applying appropriate force, the box will start to move because the force applied by us is unbalanced and there is no any force in the opposite direction to make this force balanced.

8 0

4 years ago

Which is a product in the following chemical reaction? CH4 + 2O2 → CO2 + 2H2O

NeX [460]

CH4 + 2O2 → CO2 + 2H2O

The products are water (H2O) and carbon dioxide (CO2)

5 0

3 years ago

Read 2 more answers

Which process takes place when a rechargeable battery is recharged?electrons are pushed onto the positive cathode.electrons are

LUCKY_DIMON [66]

a...............................

5 0

3 years ago