Answer : Heat required, Q = 5000 cal
Explanation :
It is given that,
Specific heat of water, c = 1 calorie/gram °C
Mass of water, m = 500 grams
Change in temperature,
We have to found the amount of heat required. Mathematically, it can be written as :
Q = 5000 cal
So, the correct option is (B) " 5000 cal ".
Hence, this is the required solution.
5000 calories Helps :)
a. True
b. False
The answer would be, B-False
Answer:
Brain signals are converted
a. True
b. False
Answer:
v = 666.67 mph
Explanation:
It is given that,
Distance from New York to California is 3000 miles
Time taken fromNew York to California is 4.5 hours
We need to find the velocity of a plane. Velocity is equal to the distance over time. So,
So, the velocity of the plane is 666.67 mph.
The mass of solid formed is 2.654 g
calculation
step 1: write the balanced molecular equation
=2AgNO3(aq) + k2CrO4(aq)→ Ag2CrO4(s) + 2 KNO3(aq)
step 2: calculate the moles of K2CrO4
moles = molarity x volume in liters
molarity = 0.200 M = 0.200 mol/L
volume = 40 .0 ml in liters = 40/1000 = 0.04 liters
moles is = 0.200 mol/l x0.04 L =0.008 moles
Step 3: use the mole ratio to determine the moles of solid formed( Ag2CrO4)
K2CrO4 :Ag2CrO4 is 1:1 therefore the moles of Ag2CrO4 is also
0.008 moles
step 4: calculate the mass of Ag2CrO4
mass = moles x molar mass
from periodic table the molar mass of Ag2Cro4
=(107.87 x2) + 52 +(16 x4) =331.74 g/mol
mass = 0.008 moles x 331.74 = 2.654 g