Answer:
Radiation
Explanation:
Radiation is a form of energy transport that can occur across empty space
Molar mass HCl = 1.01 + 35.45 => 36.46 g/mol
number of moles:
mass HCl / molar mass
9.63 / 36.46 => 0.2641 moles of HCl
Therefore:
M = moles / Volume ( in liters )
M = 0.2641 / 1.5
M = 0.1760 mol/L⁻¹
Answer:
The correct answer is - A. 12.5 gram.
Explanation:
Given:
The initial amount of sample = 400 gram
the half-life cycle = 3 days
after 15 days remain value = ?
Solution:
The number of half-lives in 15 days = 15/3
= 5 half-lives
the remaining amount of sample after one half-life 3 days = 400/2 = 200
the remaining amount of sample after 2nd half-life or 6 days= 200/2 = 100
the remaining amount of sample after 3rd half-life or 9 days= 100/2 = 50
the remaining amount of sample after 4th half-life or 12 days= 50/2 = 25
the remaining amount of sample after 5th half-life or 15 days= 25/2 = 12.5 gram
Thus, the correct answer is = 12.5 g.
Answer:
Touching a stove and burning your your hand
Explanation:
Conduction is one of the three methods of heat transfer (the others being convection and radiation). Conduction involves the transfer of heat via direct contact with a solid medium. In conduction, heat or thermal energy moves from the hotter region to the colder region.
In this question, an example of conduction is the act of "Touching a stove and burning your your hand". The stove is acting as the solid medium here, with the heat being transferred from the hot object (stove) to the less hot one (hand) via touch (direct contact).
We can first rule out choices B and D because in decomposition reactions, one reactant is decomposed or broken up to form two or more products. Choices B and D are incorrect because they both have two reactants.
Then we need to determine which choice, A or C, is correctly balanced. Choice A is incorrectly balanced because there are 2 moles of magnesium on the reactants side but only one mole of magnesium on the products side. Therefore, C is the correct choice because it is correctly balanced.
Hope this helps.