<u>Answer:</u> The correct answer is Option d.
<u>Explanation:</u>
According to mole concept:
1 mole of a substance contains number of particles.
This number is known as Avogadro's number.
The mass of 1 mole of a substance or Avogadro number of particles has the mass equal to molar mass of that substance.
Hence, the correct answer is Option d.
Answer: The correct answer is Francium and Fluorine.
Explanation:
The most vigorous chemical reaction will occur between the most reactive metal and most reactive non-metal.
Reactivity of metal is defined as the tendency of elements to loosing electrons easily. Reactivity of metals decreases as we move from left to right and increases as we move down in the group. Hence, the most reactive metal is Francium.
Reactivity of non-metals is defined as the tendency of the element to gain electrons easily. Reactivity of non-metals increases across a period and decreases as we move down in a group. Hence, the most reactive non-metal is Fluorine.
Therefore, the most vigorous chemical reaction will occur between Francium and Fluorine.
Answer:
40 and 10
Explanation:
40 plus 10 is 50 40 minus 10 is 30
Answer:
molar mass is
Explanation:
Osmotic pressure is related with concentration as follows:
Where, C is concentration or molarity , R is gas constant and T is temperature.
Osmostic pressure given is 0.0766 atm
R is
T = 25 + 273 = 298 K
Rearrange the above equation to calculate concetration of the solution as follows:
C = P/RT
molarity = moles/volume in L
moles = molarity × volume in L
volume = 5.00 mL = 0.005 L
moles = 0.00313 × 0.005
=
Therefore, molecular mass of protein is
If a pH is lower than 7 it indicates the solution is an acid.