Chemistry, 04.11.2019 20:31, dsaefong00

An unbalanced chemical equation is shown:
h202 – 2h20 + o2
which of the following statements explains why the equation is not balanced?

An unbalanced chemical equation is shown: h202 – 2h20 + o2 which of the following state

Answers: 2

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answered: tyme66

Answer : The correct option is, (1) Two H_2O_2 molecule should decomposes to form the given products.

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 unbalanced chemical reaction is,

$H_2O_2\rightarrow 2H_2O+O_2$

This reaction is an unbalanced chemical reaction because in this reaction number of hydrogen and oxygen atoms are not balanced.

In order to balance the chemical equation, the coefficient '2' put before the H_2O_2 and we get the balanced chemical equation.

The balanced chemical reaction will be,

$2H_2O_2\rightarrow 2H_2O+O_2$

Hence, the correct option is, (1) Two H_2O_2 molecule should decomposes to form the given products.

answered: Guest

well in order to answer this question you have to provide more information < 3

answered: Guest

when 25.0 ml of 0.700 mol/l naoh was mixed in a calorimeter with 25.0 ml of 0.700 mol/l hcl, both initially at 20.0 °c, the temperature increased to 22.1 °c. the heat capacity of the calorimeter is 279 j/°c.

the equation for the reaction is:

naoh + hcl → nacl + h₂o

moles of hcl = 0.0250 l hcl ×

0.700

mol hcl

1 l hcl = 0.0175 mol hcl

volume of solution = (25.0 + 25.0) ml = 50.0 ml

mass of solution = 50.0 ml soln ×

1.00

ml soln

= 50.0 g soln

δt=t2-t1

= (22.1 – 20.0) °c = 2.1 °c

the heats involved are

heat from neutralization + heat to warm solution + heat to warm calorimeter = 0

q1+q2+q3=0

nδh+mcδt+cδt=0

0.0175 mol ×

δh

+ 50.0 g × 4.184 j·g⁻¹°c⁻¹ × 2.1 °c + 279 j°c⁻¹ × 2.1 °c = 0

0.0175 mol ×

δh

+ 439.32 j + 585.9 j = 0

0.0175 mol ×

δh

= -1025.22 j

δh=1025.22j0.0175 mol= -58 600 j/mol = -58.6 kj/mol

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An unbalanced chemical equation is shown:
h202 – 2h20 + o2
which of the following state...