Answer:
Q = 96.6 j
Explanation:
Given data:
Heat required = ?
Initial temperature = 19°C
Final temperature = 33°C
Mass of disc = 3.0 g
Specific heat capacity = 2.3 J/g.°C
Solution:
Specific heat capacity:
It is the amount of heat required to raise the temperature of one gram of substance by one degree.
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = 33°C - 19°C
ΔT = 14°C
Q = 3.0 g×2.3 J/g.°C × 14°C
Q = 96.6 j
Answer:
It will take 950 million years for this amount of urea to be hydrolyzed under the same conditions in the absence of urease.
Explanation:
Given that:
- In the presence of urease:
Urease enhances the rate of hydrolysis by = 10^14
Time taken in hydrolysis is 5 min
- In the absence of urease:
Time taken in hydrolysis will be = 5 min x 10^14
Now, converting minutes into years
Time = (5 min x 10^14) / (60 min/hr x 24 hr/day x 365 days/year)
Time = 9.50 x 10^8 years
Time = 950 X 10^6 years
Time = 950 million years
Unless you made a typo. D would be most accurate as it goes the furthest into the decimals
The number of liters produced when 126g of glucose is completely reacted with O2 is calculated as follows
find the moles of C6H12O6 used that is moles = mass /molar mass
= 126g /180 g/mol = 0.7 moles
from the equation
C6H12O6 +6O2 = 6CO2 +6 H2O
the reacting ratio of C6H12O6 to Co2 is 1:6 therefore the moles of CO2 = 0.7 x6/1= 4.2 moles
At STP 1 moles of a gas = 22.4 L
what about 4.2 L = how many liters
cross multipication
= (4.2moles x 22 .4 L)/ 1mole = 94.1 L
Answer:
Electromagnetic energy and thermal energy. Those are the basic ones.