Answer:
Final temperature = 91.75 °C
Explanation:
Given data:
Mass of water = 45 g
Initial temperature = 12 °C
Energy required = 15 Kj (15000 j)
Final temperature = ?
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
Solution:
Q = m.c. ΔT
15000 j = 45 g × 4.18 j/g.°C × (T2 -T1)
15000 j = 45 g × 4.18 j/g.°C × (T2- 12 °C)
15000 j = 188.1 J/°C × (T2- 12 °C)
15000 j / 188.1 J/°C = T2- 12 °C
79.745 °C = T2 - 12 °C
T2 = 79.745 °C + 12 °C
T2 = 91.75 °C
Answer:
Whenever the pH of a solution is 7, it will be a neutral solution. Such a solution will have no effect on any litmus solution or any other indicator. pH of an Acidic Solution: All the acidic solutions have a pH of less than 7.
Explanation:
Got it from google
Answer:
True
Explanation:
There are two types of Van der waals forces which are intermolecular bonds. These bonds are London dispersion forces and Dipole-dipole attractions.
The london dispersion forces are weak attractions found between non-polar molecues and noble gas.
The attractions here is as a result of the fact that non-polar molecules or atoms sometimes becomes polar because the constant motion of its electrons may lead to an uneven charge distribution at an instant. This leads to the formation of a temporary dipole or instantaneous dipole. The dipole can induce the neighbouring molecules to be distorted and they form dipoles as well.
Answer:
<h2><em>268.944°C</em></h2>
Explanation:
(516.1°F − 32) × 5/9 = 268.944°C
Hope this helps! :)
