Answer: A
Trust me or don’t I just know it
Answer:
thats so easy but i cant help you because...yo forehead so big, yo stupid mama thought it was the moon
Explanation:
ooooh la laaaaaaaaaaa
Answer:
Mass of KBr present = 2.23 g
Explanation:
Number of moles of KBr present in 75.0 ml of 0.250 M solution of KBr is first determined
From the formula: molarity = number of moles/ volume (L);
Number of moles = molarity * volume (L)
Volume of solution in Litres = 75/1000 = 0.075
Number of mole = 0.250 * 0075 = 0.01875 moles
Mass = number of moles * molar mass
Molar mass of KBr = 119 g/mol
Mass = 0.01875 moles * 119 g/mol = 2.23 g
Answer:
The specific heat capacity of sand is less than the water.
Explanation:
On hot days, the beach sand gets hot than water because the specific heat capacity of water is higher than the sand.
Specific heat capacity:
"The amount of heat require to raise the temperature of one gram of substance by one degree"
it mean that water require more heat to raise the temperature while sand get hot by absorbing small amount of temperature.
The specific heat capacity of water is 4200 J Kg-1 °C-1
The specific heat capacity of sand is 840 J Kg-1 °C-1
Equation:
C = Q/ ΔT
Here C is the heat capacity, ΔT is the change of temperature of substance by absorbing heat and Q is the energy in joule.
Another equation:
Q = C× m × ΔT
m is the mass of given substance. The specific heat capacity of water very high than other substances that make a water compound in term of temperature.