Write the complete balanced equation for the decomposition of AI(CIO3)3.

What is the empirical formula of a compound that has 40% carbon, 6.7% hydrogen,

Eva8 [605]

Answer:

Formaldehyde(CH $_{2}$ O) or methanal is your answer.

4 0

3 years ago

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These reactions can also be reversed, breaking the large molecules into its individual molecules. what substance would need to b

lesantik [10]

The appropriate response is water. This reversible reaction can be broken into two responses. These two responses are happening all the while, which implies that the reactants are responding to yield the items, as the items are responding to deliver the reactants. Crashes of the responding atoms cause substance responses in a shut framework.

6 0

4 years ago

A 10.0 L flask at 318 K contains a mixture of Ar and CH4 with a total pressure of 1.040 atm. If the mole fraction of Ar is 0.715

andrey2020 [161]

Answer:

$w_{Ar}=0.814$

Explanation:

Hello,

In this case, given the temperature, volume and total pressure, we can compute the total moles by using the ideal gas equation:

$PV=nRT\\\\n=\frac{PV}{RT}=\frac{1.040atm*10.0L}{0.082\frac{atm*L}{mol*K}*318K}\\ \\n=0.41mol$

Next, using the molar fraction of argon, we compute the moles of argon:

$n_{Ar}=0.41mol*0.715=0.29mol$

And the moles of methane:

$n_{CH_4}=0.41mol-0.29mol=0.12mol$

Now, by using the molar masses of both argon and methane, we can compute the mass percent of argon:

$w_{Ar}=\frac{m_{Ar}}{m_{Ar}+m_{CH_4}}=\frac{0.29mol*\frac{40g}{1mol} }{0.29mol*\frac{40g}{1mol}+0.12mol*\frac{16g}{1mol}} \\\\w_{Ar}=0.814$

Regards.

7 0

3 years ago

Which statement correctly describes the differences between positive and negative acceleration?

aliya0001 [1]

Answer:

POSITIVE DESCRIBES AN INCREASE IN SPEED AND NEGATIVE DESCRIBES A DECREASE IN SPEED.

Explanation:

7 0

3 years ago

Which of the following solutions contains the greatest number of ions?

Elden [556K]

Answer : The correct option is, (A) 300.0 mL of 0.10 M CaCl₂

Explanation :

(a) 300.0 mL of 0.10 M CaCl₂

The dissociation reaction will be:

$CaCl_2(aq)\rightarrow Ca^{2+}(aq)+2Cl^-(aq)$

To calculate the number of moles of CaCl₂ as :

$\text{Moles of }CaCl_2=\text{Concentration of }CaCl_2\times \text{Volume of solution in L}$

$\text{Moles of }CaCl_2=0.10M\times 0.3L=0.03mol$

As, 1 mole of CaCl₂ contains ions = 3

So, 0.03 mole of CaCl₂ contains ions = 0.03 × 3 = 0.09 ions.

(b) 400.0 mL of 0.10 M NaCl

The dissociation reaction will be:

$NaCl(aq)\rightarrow Na^{+}(aq)+Cl^-(aq)$

To calculate the number of moles of NaCl as :

$\text{Moles of }NaCl=\text{Concentration of }NaCl\times \text{Volume of solution in L}$

$\text{Moles of }NaCl=0.10M\times 0.4L=0.04mol$

As, 1 mole of NaCl contains ions = 2

So, 0.04 mole of NaCl contains ions = 0.04 × 2 = 0.08 ions.

(c) 200.0 mL of 0.10 M FeCl₃

The dissociation reaction will be:

$FeCl_3(aq)\rightarrow Fe^{3+}(aq)+3Cl^-(aq)$

To calculate the number of moles of FeCl₃ as :

$\text{Moles of }FeCl_3=\text{Concentration of }FeCl_3\times \text{Volume of solution in L}$

$\text{Moles of }FeCl_3=0.10M\times 0.2L=0.02mol$

As, 1 mole of FeCl₃ contains ions = 4

So, 0.02 mole of FeCl₃ contains ions = 0.02 × 4 = 0.08 ions.

(d) 800.0 mL of 0.10 M sucrose

The dissociation of sucrose is not possible because it is a non-electrolyte.

To calculate the number of moles of sucrose as :

$\text{Moles of }sucrose=\text{Concentration of }sucrose\times \text{Volume of solution in L}$

$\text{Moles of }sucrose=0.10M\times 0.8L=0.08mol$

As, 1 mole of sucrose contains ions = 1

So, 0.08 mole of sucrose contains ions = 0.08 × 1 = 0.08 ions.

Hence, the solutions contains the greatest number of ions is, 300.0 mL of 0.10 M CaCl₂

3 0

3 years ago