Answer:
What you need is a thermometer and a clock.
Explanation:
Explanation:
Compound: a substance that is made up of more than 1 type of atom bonded together Example: H2O
Mixture: combination of two or more elements or compounds not chemicaly bonded together. example: Sugar and salt in one container
elements pure substance of an atom. Example: hydrogen
Answer:
a) 2.91%
b) 90.5 grams
Explanation:
Mass percentage is
mass%=
a) the mass of NaCl = 1.50g
The mass of water = 50.0 g
Total mass =1.5+50=51.50 g
mass% = 
%
b) the mass percent of NaOCl = 3.62 %
It means the mass of NaOCl in 100g of bleaching solution 3.62 g
so mass of NaOCl in 2.50kg = 0.0905 kg = 90.5g
Answer:
The amount of heat released when 50 g of water cooled from 20°C to 10°C will be equal to - 2093 J.
Explanation:
Given data:
Mass of water = 50 g
Initial temperature= T1 = 20°C
Final temperature= T2 = 10°C
Specific heat of water= c = 4.186 J/g. °C
Amount of heat released = Q= ?
Solution:
Formula:
Q = m. C. ΔT
ΔT = T2 - T1
ΔT = 10°C - 20°C
ΔT = -10°C
Now we will put the values in formula.
Q = m. C. ΔT
Q = 50 g . 4.186 J/g. °C . -10°C
Q = - 2093 J
The amount of heat released when 50 g of water cooled from 20°C to 10°C will be equal to - 2093 J.
