What is the molecular weight for H3PO4

Answers

Answer 1

Answer: H₃PO₄ - Phosphoric Acid :

H₃PO₄ = 1.0 * 3 + 31.0 + 16.0 * 4 = 98.0 g/mol

hope this helps!

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A saturated solution of NaNO3 is prepared at 60.°C using 100. grams of water. As this solution is cooled to 10.°C, NaNO3 precipitates (settles)out of the solution. The resulting solution is saturated. Approximately how many grams of NaNO3 settled out of the original solution?(1) 46 g (3) 85 g(2) 61 g (4) 126 g
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Which of the following is not a diatomic molecule? nitrogen hydrogen bromine helium

Answers

Answer: Option (d) is the correct answer.

Explanation:

When two atoms are bonded together then it is known as a diatomic molecule.

Such as nitrogen exists as $N_(2)$ molecule in atmosphere so, it is a diatomic molecule.

Hydrogen also exists as $H_(2)$ molecule in atmosphere so, it is also a diatomic molecule. Also, bromine is a diatomic molecule because it exists as $Br_(2)$ molecule into the atmosphere.

But helium exists as He molecule as it has 2 electrons so, as per the octet rule it's s-shell is completely filled. Hence, it is stable and exists as a monoatomic molecule into the atmosphere.

Thus, we can conclude that out of the given options, helium is not a diatomic molecule.

Answer:

HELIUM

That's your answer!!

Which units express specific heat capacity?J/°C, J/K, cal/°C cal/K J
/(gi°C), J/(giK), cal/(gi°C), cal/(giK)
J, cal
°C, K

Answers

Answer : The correct option is $(J)/(g^oC),(J)/(gK),(cal)/(g^oC),(cal)/(gK)$ .

Explanation :

Specific heat capacity : It is defined as the amount of heat required to raise the temperature of one gram of substance by one degree Celsius.

Formula used :

$q=mc\Delta T\nc=(q)/(m\Delta T)$

where,

q = heat required

m = Mass

c = specific heat capacity

$\Delta T$ = change in temperature

The unit of heat are expressed in terms of Joules, calories.

The unit of temperature are expressed in terms of degree Celsius, kelvin.

It is expressed as $(J)/(g^oC),(J)/(gK),(cal)/(g^oC),(cal)/(gK)$ .

The units to express specific heat capacity are cal/K, cal/ $\rm ^\circ C$ , J/K, and J/ $\rm ^\circ C$ . Thus the correct option is A.

Specific heat can be defined as the amount of heat required to raise the temperature of 1 gram of a substance by 1 degree celsius.

The expression for specific heat has been,

heat = mass $*$ specific heat capacity $*$ change in temperature

Calorie or Joule = g $*$ specific heat $*$ K or $\rm ^\circ C$

Specific heat will be:

cal/k
cal/ $\rm ^\circ C$
J/ $\rm ^\circ C$
J/K

Thus, the units to express specific heat capacity are cal/K, cal/ $\rm ^\circ C$ , J/K, and J/ $\rm ^\circ C$ . Thus the correct option is A.

For more information about the specific heat capacity, refer to the link:

brainly.com/question/2530523

How can an iceberg (temperature=0 Celsius) have more energy than a burning match head (temperature=230 Celsius)?

Answers

A burning match head whose temperature is 230 degree Celsius have more energy than an iceberg whose temperature is 0 degree Celsius.

What is Kinetic energy ?

Kinetic energy is a form of energy in which an object possesses due to its motion. The kinetic energy of an object is depends up on both the velocity and mass. The S.I unit of Kinetic energy is Joules.

The temperature of burning match head is given 230 degree Celsius and temperature of iceberg is given 0 degree Celsius. A burning match head has a higher temperature than the iceberg due to average molecule in the burning match head moves faster than the average molecule in the iceberg.

Thus, from above conclusion we can say that A burning match head whose temperature is 230 degree Celsius have more energy than an iceberg whose temperature is 0 degree Celsius.

Learn more about the Kinetic Energy here: brainly.com/question/114210

#SPJ2

temperature is the average energy of each particle and does not really give you an indication of the total internal energy. That being said, total internal energy is the sum of all of the molecule's energy in a given object so it would make sense that an ice berg (having a huge number molecules at a lower average energy) would have more internal energy than a match head (having a much smaller number of molecules at a higher average energy). Basically, the fact that ice bergs tend to be huge and contain much more molecules than a match head, means that ice bergs can have a larger total internal energy which means they store more energy.

I hope this helps.

The of an element is the total number of protons and neutrons in the______________________ of the atom.

Answers

the nucleus of the atom ....

Which best describes a reaction in a state of equilibrium? A. The rates of the forward and reverse reactions are zero and the concentrations of products

and reactants are equal.

B. The rate of the forward reaction equals the rate of the reverse reaction and the

concentrations of products and reactants are equal.

C. The rates of the forward and reverse reactions are zero and the concentrations of products

and reactants are constant.

D. The rate of the forward reaction equals the rate of the reverse reaction and the

concentrations of products and reactants are constant.

Answers

The best statement which describes a reaction in a state of equilibrium is letter D. The rate of the forward reaction equals the rate of the reverse reaction and the concentrations of products and reactants are constant.

>Chemical equilibrium is defined as the state in which both reactants and products are present in concentrations which have no further tendency to change with time. This state results when the forward reaction proceeds at the same rate as the reverse reaction. The reaction rates of the forward and backward reactions are generally not zero, but equal. Thus, there are no net changes in the concentrations of the reactant(s) and product(s).

Why for thousand of years people believed that stars moved across earth sky

Answers

Because the earth rotates. and the stars and constellations are in their exact same spots in the universe. its the same as the sun. some people can argue that the sun moves east to west, but in reality, its because the earth is rotating. :)

btw, this is more like an earth science question, not chemistry.

Because they did not have the proper technology. Hope my answer was useful.

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