Answer:
See explanation
Explanation:
Now we have, the graph attached.the stable disintegration product of C-14 is N-14.
Then;
Since the mass of C-14 originally present is 64g, at a time t= 17100 years, we will have;
N/No = (1/2)^t/t1/2
N = mass of C-14 at time t
No= mass C-14 originally present
t = time taken for N amount of C-14 to remain
No = mass of C-14 originally present
t1/2 = half life of C-14
N/64 = (1/2)^17,100/5730
N/64 = (1/2)^3
N/64 = 1/8
8N = 64
N = 8 g
Hello!
When aqueous solutions of Li₂SO₄ and NaI are mixed the following reaction occurs:
Li₂SO₄(aq) + 2NaI(aq) → 2LiI(aq) + Na₂SO₄(aq)
The compounds produced from this reaction are all soluble, so no precipitate is formed. We know that those compounds (LiI and Na₂SO₄) are soluble because of the solubility rules which states that salts from Group I elements (Li⁺, Na⁺) are soluble.
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Answer:
Below
Explanation:
This is a single replacement/displacement reaction! This is the "formula" for single replacement : A + BC = AC + B
Answer:
The best option is "Heat is transferred by the interaction of moving particles."
Explanation:
The Kinetic Molecular Theory of Heat states that molecules in a fluid increase their speed as temperature increases.
Kinetic theory of heat is a theory that the temperature of a body is determined by the average kinetic energy of its particles and that an inflow of heat increases this energy.
Heat and temperature are related to each other, but are different concepts.
1. Heat is the total energy of molecular motion in a substance while temperature is a measure of the average energy of molecular motion in a substance.
2. Temperature does not depend on the size or type of object.
Also heat can be transferred but temperature can't be transferred.
Answer:-
5
Explanation:-
Chemical formula for calcium oxide = CaO
Chemical formula of water = H2O
Chemical Formula of Calcium Hydroxide = Ca(OH)2
Mass of Ca(OH)2 = 370g
Molar mass of Ca(OH)2 = 40 x 1 + ( 16 x 1 + 1 x 1 ) x 2
= 74 g mol-1
Number of moles of Ca(OH)2 = 370 g / 74 g mol-1
= 5 moles
The balanced chemical equation for this process is
CaO + H2O --> Ca(OH)2
From the equation we see
For 1 mol of Ca(OH)2 to form, 1 mol of CaO is needed to react.
For 5 mol of Ca(OH)2 to form, 5 x 1 / 1 = 5 mol of CaO is needed to react.
