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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 ^ ^

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3) Explain why elements in the same group<br>similar properties

Alik [6]

Answer:

The elements of the same group have the same number of valence electrons, that is why they have similar properties

5 0

3 years ago

How many mL of 3.0M HCl are needed to make 300.0 mL of a 0.10M HCl?

nalin [4]

Answer:

V₁ = 10 mL

Explanation:

Given data:

Initial volume of HCl = ?

Initial molarity = 3.0 M

Final molarity = 0.10 M

Final volume = 300.0 mL

Solution:

Formula:

M₁V₁ = M₂V₂

M₁ = Initial molarity

V₁ = Initial volume of HCl

M₂ =Final molarity

V₂ = Final volume

Now we will put the values.

3.0 M ×V₁ = 0.10 M×300.0 mL

3.0 M ×V₁ = 30 M.mL

V₁ = 30 M.mL /3.0 M

V₁ = 10 mL

3 0

3 years ago

URGENT!!! How many molecules of water are produced when a molecule of C7H16 combusts

Arlecino [84]

I wish i knew im sorry

3 0

3 years ago

Enter the balanced complete ionic equation for HCl(aq)+K2CO3(aq)→H2O(l)+CO2(g)+KCl(aq). Express your answer as a chemical equati

Marat540 [252]

<u>Answer:</u> The net ionic equation is given below.

<u>Explanation:</u>

Net ionic equation of any reaction does not include any spectator ions.

These ions are defined as the ions which does not get involved in a chemical equation. They are found on both the sides of the chemical reaction when it is present in ionic form.

The chemical equation for the reaction of hydrochloric acid and potassium carbonate is given as:

$2HCl(aq.)+K_2CO_3(aq.)\rightarrow H_2O(l)+CO_2(g)+2KCl(aq.)$

Ionic form of the above equation follows:

$2H^+(aq.)+2Cl^-(aq.)+2K^+(aq.)+CO_3^{2-}(aq.)\rightarrow CO_2(g)+H_2O(l)+2K^+(aq.)+2Cl^-(aq.)$

As, potassium and chloride ions are present on both the sides of the reaction. Thus, it will not be present in the net ionic equation.

The net ionic equation for the above reaction follows:

$2H^+(aq.)+CO_3^{2-}(aq.)\rightarrow CO_2(g)+H_2O(l)$

Hence, the net ionic equation is given above.

7 0

3 years ago

If one mole of PtCl2·3NH3 reacts with AgNO3 to produce one mole of AgCl(s), how can the formula PtCl2·3NH3 be re-written to show

kap26 [50]

Don't bet any money on this but I think its [Pt(NH3)3] Cl2

6 0

3 years ago