Answer:
Hydrogen... Hydroxide
Explanation:
The number in pH is a logarithm, so when something has a higher pH by 1, it is 100 times more powerful.
Besides, the H in pH is Hydrogen.
“Flow is the volume of fluid that passes in a unit of time. In water resources, flow is often measured in units of cubic feet per second (cfs), cubic meters per second (cms), gallons per minute (gpm), or other various units.”
Molarityof the solution will be 907.35 m.
<h3>What is Molality?</h3>
Molaity is the no. Of moles of an compound is present in 1 kg solution .
Molality= no.0f moles / mass of the solution (in kg)
The SI unit of molality is m .
We have given here ,
Volume of benzene= 44.0ml
Density of benzene =0.877g/ mol
Volume of hexane =167 ml
Density of hexane =0.660g/ mol
Mass of benzene = 44×0.877
. →38.588 g
Mass of hexane→167×660
. → 110.220g
mass of the solution→148.808g
molar mass of the solution→78+ 86
. →164g/ mol
Molality = 148.808/ 164×1000
→907.35m
So , molality will be 907.35 m
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Answer:
The molar heat of combustion of hydrazine is -663.82 kJ/mole.
Explanation:
First we have to calculate the heat gained by the calorimeter.
where,
q = heat gained = ?
c = specific heat =
= final temperature =
= initial temperature =
Now put all the given values in the above formula, we get:
Now we have to calculate the enthalpy change during the reaction.
where,
= enthalpy change = ?
q = heat gained = 20.7444 kJ
n = number of moles fructose =
The molar heat of combustion of hydrazine is -663.82 kJ/mole.
Answer:
A = The central core and is composed of protons and neutrons.
Explanation:
An atom consist of electrons, protons and neutrons. The neutrons and protons are present inside the nucleus, which is central core of atom and have positive charge. While electron is present out side the nucleus.
All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons.
The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.
Symbol= e-
Mass= 9.10938356×10-31 Kg
It was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.
While neutron and proton are present inside the nucleus. Proton has positive charge while neutron is electrically neutral. Proton is discovered by Rutherford while neutron is discovered by James Chadwick in 1932.
Symbol of proton= P+
Symbol of neutron= n0
Mass of proton=1.672623×10-27 Kg
Mass of neutron=1.674929×10-27 Kg