Answer:
Hertz (I guess you can say love HERTZ)
Explanation:
The hertz (image: Hz) is the determined unit of recurrence in the International System of Units (SI) and is characterized as one cycle for every second. It is named after Heinrich Rudolf Hertz, the principal individual to give definitive evidence of the presence of electromagnetic waves.
Answer:
C combination reaction (synthesis) reaction
Explanation:
two chemicals are combined
Idk i just need to ask a question
Answer: The %v/v of the given KCl solution is 7.6%.
Explanation:
Given: Volume of solute =
Volume of solution =
Formula used to calculate %v/v is as follows.
Substitute the values into above formula as follows.
Thus. we can conclude that the %v/v of the given KCl solution is 7.6%.
Answer:
The mass of nitrogen gas will be 31,3 g
Explanation:
We calculate the weight of 1 mol of N2 (nytrogen gas):
Weight 1 mol N2= 2 (weight N)= 2 x 14 g/mol = 28g/mol
The conditions STP are 1 atm of pressure and 273K of temperature. We use the formula:
PV=nRT
1 atmx 25,0L= n x0,082 l atm/K mol x 272 K
n= 1 atmx 25,0L/0,082 l atm/K mol x 272 K= 1, 12 mol
1 mol N2-----28 g
1,12mol N2---x= (1,12mol N2 x28g)/1 mol N2= 31, 3 g