Answer:
HBr is a strong acid
Explanation:
KBr is a salt which makes a base . also KOH is a base
Answer:
P₂ = 1.92 atm
Explanation:
According to the boyle's law:
The pressure of given amount of gas at constant temperature and number of moles of gas is inversely proportional to the volume.
P₁V₁= P₂V₂
Given data:
Initial volume = 4.00 L
Initial pressure = 1.20 atm
Final volume = 2500 mL
Final pressure = ?
Solution:
First of all we will convert the volume into litter.
2500 mL × 1L/1000 mL = 2.5 L
P₁V₁ = P₂V₂
P₂ = P₁V₁ /V₂
1.20 atm×4.00 L = P₂ ×2.5 L
P₂ = 1.20 atm×4.00 L/ 2.5 L
P₂ = 4.8 atm. L/ 2.5 L
P₂ = 1.92 atm
Answer:
particle size analysis, particle size measurement, or simply particle sizing is the collective name of the technical procedures, or laboratory techniques which determines the size range, and/or the average, or mean size of the particles in a powder or liquid sample.
Explanation:
Answer:
One gram helium gas is equal to the 4.002602 g/mole
Explanation:
Helium gas is a gas or chemical element. The symbol of helium gas is He and the atomic number of this gas is 2. This gas is colorless, odorless, and tasteless. It is a non-toxic gas. It is found in the periodic table in the first place.
Helium is a very lightest gas and very abundant in nature in the universe. It is present in the universe around 24 percent. Helium is also called by another name that titan of sun. This is detected by the yellow line. The liquid form of helium gas is called cryogenics. This helium gas is used in lifting balloons and airplanes.
Answer:
4.66667 minutes
Explanation:
Rate constant, k = 9.90×10−3 s−1
Time = ?
Initial concentration, [A]o = 100
Final concentration, [A] = 6.25
The integral rate law for first order reactions is given as;
ln[A] = ln[A]o − kt
kt = ln[A]o - ln[A]
t = ( ln[A]o - ln[A]) / k
t = [ln(100) - ln(6.25)] / 9.90×10−3
t = 2.77 / 9.90×10−3
t = 0.28006 ×103
t = 280 seconds
t = 4.66667 minutes (Upon conversion by dividing by 60)