Ask question

Ask question

All categories

4 years ago

9

Hydrogen peroxide, which decomposes in a first order reaction, has a half-life of 10 hours in air. how long will it take for hyd

rogen peroxide to decompose to 10% of its original concentration?

1 answer:

VLD [36.1K]4 years ago

4 0

Hello! Let me try to answer this :)

Thanks and please correct if there are any mistakes ^ ^

You might be interested in

Predict the sign of the entropy change, ΔS∘, for each of the reaction displayed.Drag the appropriate items to their respective b

Sonja [21]

Answer:

Ag+(aq)+Br−(aq)→AgBr(s) NEGATIVE

CaCO3(s)→CaO(s)+CO2(g)2 POSITIVE

NH3(g)→N2(g)+3H2(g) POSITIVE

2Na(s)+Cl2(g)→2NaCl(s) NEGATIVE

C3H8(g)+5O2(g)→3CO2(g) +4H2O(g) POSITIVE

I2(s)→I2(g) POSITIVE

Explanation:

We have to remember, to solve this problem, that the entropy of a gas is higher than that of a liquid which in turn is higher than the solid. Therefore, comparing the reactants and products look for changes in the state of reactants and products. We also have to look for the increase or decrease of moles of each state based on the balanced chemical reaction.

Ag+(aq)+Br−(aq)→AgBr(s)

The reaction product is a single solid and the the reactants were 2 species in solution. The change in entropy is negative.

CaCO3(s)→CaO(s)+CO2(g)2

Here we have a solid reactant and we have a solid product plus a gas product. The change in entropy is positive.

NH3(g)→N2(g)+3H2(g)

We have 4 mole gases as products starting from 1 mol reactant gas, the entropy has increased.

2Na(s)+Cl2(g)→2NaCl(s)

In this reaction 2 mol solid Na and 1 mol Cl₂ gas are converted into 2 mol solid NaCl, the entropy has decreased.

C3H8(g)+5O2(g)→3CO2(g) +4H2O(g)

The products are 7 mol of gas versus 6 mol of gas reactants and therefore entropy has increased.

I2(s)→I2(g)

1 mol solid I₂ goes into 1 mol gas making the change in the entropy higher.

4 0

3 years ago

________ properties depend on the amount of material present.

Kamila [148]

Answer: Extensive!

Explanation:

6 0

3 years ago

What does subducted mean

vovikov84 [41]

The sideways and downward movement of the edge of a plate of the earths crust into the mantle beneath another plate

4 0

3 years ago

Read 2 more answers

The two general types of air pollution are _____ and _____.

Verizon [17]

Liquid and gases is the two general types of air pollution

5 0

3 years ago

5. Calculate the surface tension of water at 20 °C given that at that temperature water climbs to a height of 4.96 cm in a clean

garri49 [273]

Explanation:

Relation between density, height, and surface tension is as follows.

$\gamma = \frac{1}{2} \rho \times g \times h \times r$

The given data is as follows.

Density, ( $\rho$ ) = 998.2 $kg/m^{3}$

g = 9.807 m/s

h = 4.96 cm = $4.96 \times 10^{-2} m$ (as 1 m = 100 cm)

r = 0.3 mm = $3 \times 10^{-4} m$ (as 1 m = 10000 mm)

Therefore, putting the given values into the above formula and calculate the surface tension as follows.

$\gamma = \frac{1}{2} \rho \times g \times h \times r$

= $\frac{1}{2} 998.2 kg/m^{3} \times 9.807 m/s^{2} \times 4.96 \times 10^{-2}m \times 3 \times 10^{-4} m$

= $72832 \times 10^{-6} kg/s^{2}$

or, = $7.28 \times 10^{-2} N/m$

Thus, we can conclude that value of surface tension is $7.28 \times 10^{-2} N/m$ .

7 0

3 years ago