A student wrote a chemical equation as shown.
2 answers:
Answer : The correct option is, Add a coefficient 2 before and a 2 before
.
Explanation :
Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.
If the amount of atoms of each type on the left and right sides of a reaction differs then to balance the equation by adding coefficient in the front of the elements or molecule or compound in the chemical equation.
The coefficient tell us about that how many molecules or atoms present in the chemical equation.
The given chemical reaction is,
This reaction is an unbalanced chemical reaction because in this reaction number of hydrogen, sulfur and oxygen atoms are not balanced.
In order to balance the chemical equation, the coefficient '2' is put before the and
and we get the balanced chemical equation.
The balanced chemical reaction will be,
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Answer:
73.73°C is the final temperature of the coffee.
Explanation:
Heat lost by the coffee = Q
Mass of the coffee = m
Volume of coffee = V =
Density of water = Density of coffee solution = d = 1 g/mL (given)
Heat capacity of the coffee is equal to that of water= c = 4.18 J/g°C
Initial temperature of the coffee =
Final temperature of the coffee = T
Heat required to melt 11 grams of melt ice = Q'
Latent heat of ice =
Heat absorbed by the ice after melting = q
Mass of ice melted into water = m' = 11 g
Heat capacity of water = c = 4.18 J/g°C
Initial temperature of water = = 0°C
Final temperature of water = T
According law of conservation of energy , energy lost by coffee will equal to heat required to melt ice and further to raise the temperature of water.
On solving we get:
T = 73.73°C
73.73°C is the final temperature of the coffee.
Answer: Rate in terms of disappearance of =
Rate in terms of disappearance of =
Rate in terms of appearance of =
Explanation:
Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.
The rate in terms of reactants is given as negative as the concentration of reactants is decreasing with time whereas the rate in terms of products is given as positive as the concentration of products is increasing with time.
Rate in terms of disappearance of =
Rate in terms of disappearance of =
Rate in terms of appearance of =