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2 years ago

Balance the equation above please

Chemistry

2 answers:

Zepler [3.9K]2 years ago

8 0

Answer:

everything can be found in the picture

Anon25 [30]2 years ago

6 0

Answer:

<h3>Balanced Equation:-</h3>

Al2(CO3)3. ---heat---> Al2O3 + 3 CO2

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An 85.0 g sample of iron requires 954 J of heat to raise its temperature 25.0°C. What is the specific heat of the iron? \

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Answer:448.9 J/kg °C

Explanation:

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3 years ago

What is the mass of 8.12 × 1023 molecules of CO2 gas? (Atomic mass of carbon = 12.011 u; oxygen = 15.999 u.)

Elza [17]

Answer:

8306.76

Explanation:

you just calcuate 8.12 x 1023 and that will give you the answer

<h2>PLZ mark me as a BRAINLIEST</h2>

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3 years ago

Which of the following statements is true? Question 2 options: Chemical reaction rates vary with the conditions of the reaction,

lora16 [44]

I think the answer will be the first one

6 0

3 years ago

Aspirin can be made in the laboratory by reacting acetic anhydride (C 4H 6O 3) with salicylic acid (C 7H 6O 3) to form aspirin (

Anastasy [175]

Answer: The percent yield of the aspirin is 77.5 %.

Explanation:

To calculate the mass of acetic anhydride, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

Density of acetic anhydride = 1.08 g/mL

Volume of acetic anhydride = 2.80 mL

Putting values in above equation, we get:

$1.08g/mL=\frac{\text{Mass of acetic anhydride}}{2.80mL}\\\\\text{Mass of acetic anhydride}=(1.08g/mL\times 2.80mL)=3.024g$

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ .....(1)

For acetic anhydride:

Given mass of acetic anhydride = 3.024 g

Molar mass of acetic anhydride = 102.1 g/mol

Putting values in equation 1, we get:

$\text{Moles of acetic anhydride}=\frac{3.024g}{102.1g/mol}=0.0296mol$

For salicylic acid:

Given mass of salicylic acid = 1.24 g

Molar mass of salicylic acid = 138.12 g/mol

Putting values in equation 1, we get:

$\text{Moles of salicylic acid}=\frac{1.24g}{138.12g/mol}=0.0089mol$

The chemical equation for the combustion of hexane follows:

$C_4H_6O_3+C_7H_6O_3\rightarrow C_9H_8O_4+C_2H_4O_2$

By Stoichiometry of the reaction:

1 mole of salicylic acid reacts with 1 mole of acetic anhydride

So, 0.0089 moles of salicylic acid will react with = $\frac{1}{1}\times 0.0089=0.0089mol$ of acetic anhydride

As, given amount of acetic anhydride is more than the required amount. So, it is considered as an excess reagent.

Thus, salicylic acid is considered as a limiting reagent because it limits the formation of product.

By Stoichiometry of the reaction:

1 mole of salicylic acid produces 1 mole of aspirin

So, 0.0089 moles of salicylic acid will produce = $\frac{1}{1}\times 0.0089=0.0089moles$ of aspirin

Now, calculating the mass of aspirin from equation 1, we get:

Molar mass of aspirin = 180.16 g/mol

Moles of aspirin = 0.0089 moles

Putting values in equation 1, we get:

$0.0089mol=\frac{\text{Mass of aspirin}}{180.16g/mol}\\\\\text{Mass of aspirin}=(0.0089mol\times 180.16g/mol)=1.60g$

To calculate the percentage yield of aspirin, we use the equation:

$\%\text{ yield}=\frac{\text{Experimental yield}}{\text{Theoretical yield}}\times 100$

Experimental yield of aspirin = 1.24 g

Theoretical yield of aspirin = 1.60 g

Putting values in above equation, we get:

$\%\text{ yield of aspirin}=\frac{1.24g}{1.60g}\times 100\\\\\% \text{yield of aspirin}=77.5\%$

Hence, the percent yield of the aspirin is 77.5 %.

7 0

3 years ago

When you climb a rope you change? energy into? energy

Afina-wow [57]

You have potential energy to begin with and then you change it into Kinetic energy (or the energy of motion). Once you reach the top of the rope however you will again have potential energy.

3 0

3 years ago

Read 2 more answers

Balance the equation above please ​

Balance the equation above please