Answer: 
Explanation:
A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.
A double displacement reaction in which one of the product is formed as a solid is called as precipitation reaction.
The balanced chemical equation is:
Answer:
1 mile = 1,609 meters
3.02E6 mi^2 x (1609^2m^2/mi^2) = 7.818E12 m^2
1 in= 2.54 cm => 2 in = 5.08cm = .0508m
7.818E12 m^2 x .0508m = 3.97E11 m^3
1 cubic meter = 1,000,000 cubic centimeters
3.97E11 m^3 x (1,000,000 cm^3 / m^3) = 3.97E17 cm^3
1000 cm^3 = 1L
3.97E17 cm^3 x (1L / 1000cm^3) = 3.97E14 L
or 3.97 x 10^14 L
convert to grams since 1L is 1000g
(3.97x10^14) x1000g which is 3.974x10^ 17g which is the final ans
Explanation:
Specific heat describes how much heat a substance takes to raise the temperature. Hence, Option (c) is correct
<h3>
What is Specific Heat ?</h3>
Specific heat capacity is the amount of heat energy required to raise the temperature of a substance per unit of mass.
The specific heat capacity of a material is a physical property.
It is also an example of an extensive property since its value is proportional to the size of the system being examined.
Specific heat describes how much heat a substance takes to raise the temperature. Hence, Option (c) is correct
Learn more about Specific heat here ;
brainly.com/question/21041726
#SPJ1
Reverse the 2nd reaction,
CO2 + H2 -------> CO + H2O---- i
Now new equilibrium constant will be,
K' = 1/K2 = 10^-5
Adding i and last equation you'll get,
<span>CO2 (g) + 3 H2 (g)----->CH3OH (g) + H2O (g)
K1 = K' x K3 = 1.4 x 10^2 </span>
<span>The correct answer here is that the reason chemical changes can be considered unseen, is because the alterations made within an element when it undergoes a chemical change occurs within the very atoms of the cell itself. In contrast with this, a physical change (such as a solid changing to a liquid through melting) does not change the element itself, but just it's physical form, so this can be seen easily to the human eye.</span>
