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Oksana_A [137]
3 years ago
5

Bleaching powder reaction, mechanism, use

Chemistry
1 answer:
Ivenika [448]3 years ago
7 0

Answer:

Bleaching Powder's chemical formula is CaOCl2 and is called Calcium Oxychloride. It is prepared on dry slaked lime by chlorine gas. 2. ... It gives calcium chloride, chlorine and water when bleaching powder reacts with hydrochloric acid.

Explanation:

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Explain concisely what is responsible for the variation of atomic radii in group 3A,4A,5A,6A
Svetradugi [14.3K]

The reason responsible for the variation in atomic radii in group 3A,4A,5A,6A is increasing size of the nuclear charge.

As we move across the period in the periodic table, the size of the nuclear charge is increased because more protons are added but there is no increase in the number of shells.

As such, the outermost electrons experience greater attraction for the nucleus from left to right across the period.

This increased attraction causes the atoms to become smaller across the period.

Hence, across the period, the atomic radii of elements in groups  3A,4A,5A,6A decreases steadily.

Learn more: brainly.com/question/24621952

3 0
3 years ago
Read 2 more answers
How is the atomic mass of an element related to a mole?
Luden [163]

Answer:

i the answer to your question should be C

Explanation:

Hope this helps!

4 0
2 years ago
The combustion of liquid methanol has a change in enthalpy of -1278 kJ. How much energy will you get from burning 245.0 g of met
Nookie1986 [14]

Answer : 9773 kJ

Explanation:

Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat and \Delta H for the reaction comes out to be negative.

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}    

\text{Moles of methanol}=\frac{245.0g}{32.04/mol}=7.647moles

Given : Change in enthalpy on combustion of 1 mole of methanol = -1278  kJ

According to stoichiometry :

1 mole of methanol produce energy = 1278 kJ

Thus 7.647 moles of methanol produce energy =\frac{1278}{1}\times 7.647=9773kJ  

Thus 9773 kJ of energy is produced from burning 245.0 g of methanol in excess oxygen

3 0
3 years ago
Air enters a diffuser witha velocity of 400 m/s, a pressure of 1 bar and temperature of 25 C. It exits with a temperature of 100
ANEK [815]

Answer:

Exit velocity of air is 96.43 m/s.

Explanation:

Given that

V_1=400\ m/s

T_1=25C

T_2=100C

For air

C_p=1.005\ KJ/kg.K

Now from first law of thermodynamics for open system at steady state

h_1+\dfrac{V_1^2}{2000}+Q=h_2+\dfrac{V_2^2}{2000}+w

For diffuser

h_1+\dfrac{V_1^2}{2000}=h_2+\dfrac{V_2^2}{2000}

We know that

h=C_pT

h_1+\dfrac{V_1^2}{2}=h_2+\dfrac{V_2^2}{2000}

1.005\times 25+\dfrac{400^2}{2000}=1.005\times 100+\dfrac{V_2^2}{2}

V_2=96.43\ m/s

So the exit velocity of air is 96.43 m/s.

8 0
4 years ago
Convert 3.8 Km/sec to miles/year
weqwewe [10]
We are asked to convert from units of kilometer per second to units of miles per year. To do this, we need a conversion factor which would relate the different units involved. We either multiply or divide this certain value to the original measurement depending on what is asked. From literature, we will find that 1 mile is equal to 1609 meters and 1000 m is equal to 1 kilometer. Also, we will find that 3600 s is equal to 1 hr, 24 hr is equal to 1 day and 365 days is equal to 1 year. We do the conversion as follows:

3.8 km / s ( 1000 m / 1 km ) ( 1 mile / 1609 meters ) ( 3600 s / 1 hr ) ( 24 hr / 1 day ) ( 365 days / 1 year ) = 74479055.3 miles per year
5 0
3 years ago
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