A tank of hydrogen gas has a volume of 22.9L and hold 12 mol of gas at 12°C what is the pressure of the gas in atmospheres?

Answer:

10.57

Explanation:

pOH = pKb + log(acid/base)

Answer:

Q1) 0,1276 M

Molair mass of NaOCl = 74,44 g/mol

You have 9,5 g/L.

You need to calculate with the molar mass, how many moles 9,5 g are:

9,5 g / 74,44 g/mol = 0,1276 molAR

0,1276 mol / 1 L = 0,1276 M

Q2) 27.78  grams

The  mass    ca(Oh)2  needed  to  produce  1.5 l  of  0.25 solution  is  calculated  as follows

find  moles

=moles   = molarity   x  volume

moles is therefore =   1.5  x 0.25  =  0.375  moles

mass  =  moles  x  molar  mass

0.375mol  x  74.09 g/mol  =  27.78  grams

Explanation:

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The hydrolysis of  N,N-diethyl-m-toluamide yields 3-methylbenzoic acid which easily biodegradable.

The insecticide repellent N,N-diethyl-m-toluamide is used to repel rather than kill insects. It functions by interfering with the ability of the insects to detect body heat and skin chemicals. In a nutshell, it confuses the receptors in the insect.

The hydrolysis of N,N-diethyl-m-toluamide  yields 3-methylbenzoic acid and diethylamine as the products. This is important because the 3-methylbenzoic acid is not an environmental concern since it is readily biodegradable and does not accumulate significantly in living organisms. It has also not been found to be mobile in soil and water. Environmental concerns are always a prime consideration in assessing chemicals for use.

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Answer:

c

Explanation:

because of the law of gravity

Answer:

The answers are all small.

Explanation:

They are all small because a asteroid has a small amount of energy and produces a small amount a small crater. A small crater was likely formed by a small asteroid.

The mass of glycerol to that would need to be combusted to heat 500.0g of water from 20.0°C to 100.0°C is; 9.32 grams.

We must establish the fact that energy is neither created nor destroyed.

Therefore, the amount of heat absorbed by water is equal to the amount of heat released by the combustion of glycerol.

Total heat absorbed by water, H(water) is;

Q(water) = m C (T2 - T1)

Q(water) = 500 × 4.184 × (100-20)

Q(water) = 167.36 kJ

Consequently, the quantity of heat evolved by the combustion of glycerol is;

Q(glycerol) = 167,360 J = n × ΔH°comb

where, n = no. of moles of glycerol.

167.36 kJ= n × 1654 kJ/mole

n = 167.36/1654

n = 0.1012 moles of glycerol.

Therefore, mass of glycerol combusted, m is;

m = n × Molar mass

m = 0.1012 × 92.09

m = 9.32 g.

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Answer:

Destroyed.

Explanation:

The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. 

Answer:g

Explanation:

g

Answer:

Explanation:

where anwser

Answer:

for instance :

water , H²O , and hydrogen peroxide . H²O² , are alike

in that their respective molecules are composed of hydrogen and oxygen atomd . hope its helpful . Good luck :)

accretion disk- does not spin

solar system- a central star with planets around it

solar nebula- may form after a supernova

Hope this helps!!

Answer:

1. follow

2. corellation

3.does

Explanation:

i dont know for sure but I think those are the answers cause the two lines look around the same.

Answer:

the UV exposure is my guess

Answer:

g/kg

Explanation:

they are both a unit of weight

notice how the others have a unit of weight and then measurement? g/kg are two units of weight

Answer:

Grams/kg

Explanation:

Answer:

8 is the answer.

Explanation:

100,000,1000

= 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10

= 10^8

Answer:

-14.4kJ

Explanation:

The value of heat energy in a bomb calorimeter with  a glucose sample of mass 4.40 g if changes temperature from 15 to 18 degree celsius is 16369.54 kJ.

Calorimeter is a thermal device used to determine the heat evolved or absorbed from a reaction. From this we can also calculate the enthalpy change.

If the enthalpy is negative, then the reaction is endothermic. If enthalpy change is positive, then the reaction is exothermic. The equation for finding the heat energy q from the mass, temperature change and heat capacity of calorimeter is given below:

q = mc ΔT.

It is given that the total mass is 804.40 g and heat capacity of the calorimeter is 550 J/°C g, then the heat energy  q is calculated as follows:

q = 804.40 g × 550 J/°Cg (18.7 °C - 15 °C)

  = 16369540J

  = 16369.54 KJ.

Hence, the value of q for the bomb calorimeter is 16369.54 KJ.

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Answer:

Because it is!

Explanation:

Hurricanes was the one of the big natural disaster . Yes, it was true and it is in the book of mythology.

It was so destructive primarily because levees around New Orleans, Louisiana failed. Levees are water barriers built to prevent flooding (parts of New Orleans have an elevation that is lower than sea level). When the levees failed, huge areas of the cities flooded.

Water is in constant motion, moving from the ocean to the sky to the earth. Flooding is a natural event which occurs when water overflows a stream, river or drain. Floods are caused by rainfall, melting snow or ice, or by the failure of structures such as dams.

There are main four parts  of water cycle . i.e. evaporation , convection , precipitation and - collection.

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This question involves the simple concept of percent by volume in a solution.

The volume of ethanol present in the bottle is found to be "48.75 ml".

The percent by volume of a solution means the amount of that substance present in the solution, represented as a fraction of the total volume of the solution. Hence, the volume of ethanol present in the bear can be found by using the following formula:

[tex]Percent\ by\ Volume\ of\ Ethanol = \frac{Volume\ of Ehanol}{Total\ Volume\ of\ Beer}(100\ \%)\\\\6.50\ \% = \frac{V}{750\ mL}(100\ \%)\\\\V = \frac{(6.50\ \%)(750\ mL)}{100\ \%}[/tex]

V = 48.75 mL

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Answer:

Which of the following is a possible set of quantum numbers for a 3p orbital?

Since you are dealing with a 3p-orbital, your principal and angular momentum quantum numbers will be n=3 and l=1 .

Answer:

.

Explanation: man that's okay

Answer:

Organ system

Explanation:

Answer:

I dont understand what the question means

Explanation:

Answer:

4

Explanation:

Answer:

Solar radiation is radiant energy emitted by the sun from a nuclear fusion reaction that creates electromagnetic energy.  About half of the radiation is in the visible short-wave part of the electromagnetic spectrum. The other half is mostly in the near-infrared part, with some in the ultraviolet part of the spectrum.

Explanation:

Hope it helps

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