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Misha Larkins [42]
2 years ago
10

A bus travels 20km in 30minutes what is the average speed of the bus?

Chemistry
1 answer:
Vera_Pavlovna [14]2 years ago
7 0

Answer:

40km/hr

Explanation:

Speed = Distance ÷ Time and since they both have different units we have to change one of them. Therefore if we change 30 minutes to half an hour we say 20km ÷ ¹/2

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1. If 3.2 L of nitrogen monoxide and 4.3 g of oxygen gas are combined, what volume of nitrogen dioxide will be formed? 2NO + 0,
Free_Kalibri [48]

Answer:

3.2 \div 22.4 =  \frac{1}{7} mol \: no

4.3 \div 32 = 0.134mol \: o2

Explanation:

NO is limit reactant so:

1÷7×46=6.57 grams of NO2 will form

3 0
3 years ago
Which of the following is necessary to do a complete stoichiometric calculation? A) Add the nuclear masses of the products.
Katena32 [7]

Answer:

Option (C). Write the complete balanced chemical equation.

Explanation:

Writing a balanced chemical equation is the key to arriving at the correct stoichiometric calculations because it gives a fore knowledge of the correct amount of reactants needed to generate a predicted products for a given reaction

5 0
3 years ago
Naphthalene combustion may be used to calibrate the heat capacity of a bomb calorimeter. The heat of combustion of naphthalene i
tino4ka555 [31]

Answer:

.

Explanation:

5 0
3 years ago
An experiment reveals that 125.0 grams of an unknown metal increases in temperature from 22.0 oC to 43.6 oC upon absorbing 640 j
nydimaria [60]

Answer:

                     Cp  =  0.237 J.g⁻¹.°C⁻¹

Explanation:

                      Amount of energy required by known amount of a substance to raise its temperature by one degree is called specific heat capacity.

The equation used for this problem is as follow,

                                                 Q  =  m Cp ΔT   ----- (1)

Where;

           Q  =  Heat  =  640 J

           m  =  mass  =  125 g

           Cp  =  Specific Heat Capacity  =  <u>??</u>

           ΔT  =  Change in Temperature  =  43.6 °C  -  22 °C  =  21.6 °C

Solving eq. 1 for Cp,

                                Cp  =  Q / m ΔT

Putting values,

                                Cp  =  640 J / (125 g × 21.6 °C)

                                Cp  =  0.237 J.g⁻¹.°C⁻¹

3 0
2 years ago
Identify the reaction type and the products. Al+F2 -&gt;
Lady bird [3.3K]

Answer:

redox and AlF2

Explanation:

4 0
2 years ago
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