An addition of acid increases the solubility of calcium phosphate
because the hydrogen ions can easily dissociate and form salts. And example is
from the reaction 3H2SO4 + Ca3(PO4)2 → 2H3PO4 + 3CaSO4. CaSO4 is the salt of
sulfuric acid and calcium phosphate.
Answer:
When 22.0 g of water is heated from 17 °C to 100 °C what amount of heat absorbed?
When 22.0 g of water is heated from 17 °C to 100 °C water absorbed 7643.64 j heat.
Explanation:
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
Given data:
Mass of water = 22.0 g
Initial temperature = 17°C
Final temperature = 100°C
Solution:
ΔT = T₂ -T₁
ΔT = 100°C - 17 °C= 83°C
Q = m.c. ΔT
Q = 22 g× 4.186 j/g °C × 83 °C
Q = 7643.64 j
It means water require more heat which is 7643.64 j to increase its temperature from 17 °C
to 100 °C
.
Answer:
The Valence Shell Electron Pair Repulsion Theory abbreviated as VSEPR theory is based on the premise that there is a repulsion between the pairs of valence electrons in all atoms, and the atoms will always tend to arrange themselves in a manner in which this electron pair repulsion is minimalized
Because it neutralizes, therefore becoming something safe that we can eat. Na+ Cl- = NaCl
Answer:
The correct answer is - 9935 years approximately.
Explanation:
Let z be the age in years to be found:
(15300 disintegrations) x (1.0 g / 0.250 g) / (1.84×10^4 disintegrations)
= 3.3260
half life of carbon = (1/2)^(z/5730 yr)
Solve for z
3.3260 = (1/2)^(z/5730)
Take the log of both sides:
log 3.3260 = (z/5730) log (1/2)
log 3.3260 / log (1/2) = z/5730
z = 5730 log 3.3260 / log (1/2)
= 1.73378816*5730
= 9935 years approximately.