Answer:
500 cal
Explanation:
m=25g,c=1cal/g, change in temperature=70-50,20 degree Celsius Q=?
using formula Q=mxcx change in theta
Q=25x1x20
Q=500cal
Answer:
ITS B
Explanation:
MY CONSCIOUS MIND IS TELLING ME
Answer:
6.7970 g
Explanation:
Considering the Henderson- Hasselbalch equation for the calculation of the pOH of the basic buffer solution as:
pOH = pK + log[acid] / [base]
Where K is the dissociation constant of the base.
Base dissociation constant of the ammonia = 1.8×10⁻⁵
pK = - log (Kb) = - log (1.8×10⁻⁵) = 4.75
Given concentration of base = [base] = 0.273 M
pH = 10.150
pOH = 14 - pH = 14 - 10.150 = 3.85
So,
3.85 = 4.75 + log[acid]/0.273
[Acid] = 0.0347 M
Given that Volume = 2 L
So, Moles = Molarity × Volume
Moles = 0.0347 × 2 = 0.0694 moles
Molar mass of ammonium bromide = 97.94 g/mol
Mass = Moles × Molar mass = (0.00775 × 97.94) g = 6.7970 g
At the point when the new star arrives at a specific size, a cycle called atomic combination lights, creating the star's tremendous vitality. The combination cycle powers hydrogen molecules together, changing them into heavier components, for example, helium, carbon and oxygen.
^ already paraphrased so no need to change up anything !!
The volume of a gas can be found by using ideal gas formula. The formula would be:
V= nRT/P
where
n= number of the molecule (mol)
R= constant
T= temperature
P= pressure
Then, the answer would be
<span>1. temperature
2. pressure
3. mass
4. number of molecules </span>