1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Andru [333]
8 months ago
13

SEP Use Math In another experiment, a chemist combines 7.2 grams of carbon with 19.2 grams of oxygen to form a compound. Identif

y the compound as either carbon monoxide (CO) or carbon dioxide (CO2).Moles carbon: Moles oxygen: Ratio of the number of carbon atoms to the number of oxygen atoms: Chemical formula for the compound:

Chemistry
1 answer:
babunello [35]8 months ago
3 0

Step 1 - Remembering the law of mass conservation

As stated by the law of mass conservation, in a chemical process no atoms can be created or destroyed. Consequently, the mass of the system will not change: the sum of the masses of reactants will be exactly equal the sum of the masses of products.

Step 2 - Using the law of mass conservation to understand the problem

The law of mass conservation therefore guarantees that, if we are mixing 7.2 g of C with 19.2 g of O, we will form 7.2+19.2 g of whatever is the product. Therefore we will form 26.4 g of product, which will be either CO or CO2.

Step 3 - Using mass percentage to find the correct product

Since we already know what will the mass of the product be, we can calculate the percentage of C in the product:

\text{ \%(C)=}\frac{7.2}{26.4}\times100=27.3\text{ \%}

Now, let's calculate the percentage of C in both CO (28 g/mol) and CO2 (44 g/mol), remembering that the molar mass of C is 12 g/mol:

\begin{gathered} CO\to\text{ \%(C)=}\frac{12}{28}\times100=42.8\text{ \%} \\  \\ CO_2\to\text{\%(C)=}\frac{12}{44}\times100=27.3\text{ \%} \end{gathered}

We can see that in CO2 the amount percent of C is exactly the same as we have calculated for the unknown product of this reaction. Therefore, the product is CO2.

You might be interested in
How many moles of helium are 8.84×10^24 atoms of He?
viva [34]

Answer:

14.77 mol.

Explanation:

  • It is known that every 1.0 mole of compound or element contains Avogadro's number (6.022 x 10²³) of molecules or atoms.

<u><em>Using cross multiplication:</em></u>

1.0 mole of He contains → 6.022 x 10²³ atoms.

??? mole of He contains → 8.84 x 10²⁴ atoms.

<em>∴ The no. of moles of He contains (8.84 x 10²⁴ atoms) </em>= (1.0 mol)(8.84 x 10²⁴ atoms)/(6.022 x 10²³ atoms) =<em> 14.77 mol.</em>

8 0
3 years ago
Ammonium perchlorate NH4ClO4 is a powerful solid rocket fuel, used in the Space Shuttle boosters. It decomposes into nitrogen N2
patriot [66]

Answer: 0.055 moles of O_2 are produced by the reaction of 0.055 mol of ammonium perchlorate.

Explanation:

The balanced chemical reaction for decomposition of ammonium perchlorate is:

2NH_4ClO_4\rightarrow N_2+Cl_2+2O_2+4H_2O  

According to stoichiometry :

2 moles of NH_4ClO_4 produce = 2 moles of O_2

Thus 0.055 moles of NH_4ClO_4 will produce =\frac{2}{2}\times 0.055=0.055moles of O_2

Thus 0.055 moles of O_2 are produced by the reaction of 0.055mol of ammonium perchlorate.

7 0
3 years ago
Why cant (NaCl) light the bulb until the NaCl is dissolved in water. *
Aneli [31]

Answer:

NaCl will only conduct electricity in solutions

Explanation:

For electrical conduction, free mobile electrons as seen in most metals must be present or ions which are charged particles must be available for solutions and molten substances.

  • Sodium chloride is an ionic compound without free mobile electrons or ions despite being ionic.
  • It will maintain a subtle and unique charge stability when in solid form.
  • In solid, the ions are not free to move and remain locked up in the solid mass.
  • When introduced into a solution, the ions becomes free to move and this will aid electrical conduction.
6 0
3 years ago
Zinc metal reacts with copper sulfate through the following
morpeh [17]

Answer:

26.9

Explanation:

5 0
2 years ago
What happens when copper nitrate II is heated​
cupoosta [38]

Answer:

Copper nitrate is a blue coloured crystal.which copper nitrate is heated it loses the water molecule and then when is further heated it decomposes to give redddish brown gas,nitrogen dioxide and oxygen.

Explanation:

4 0
3 years ago
Other questions:
  • Which of the following would be a warning sign that information about a weight loss medication is not reliable science?
    8·2 answers
  • Lewis is making a model of the Earth-Moon system. He knows that the diameter of the Earth is about four times greater than the d
    7·2 answers
  • If a 0.75 mole sample of helium gas occupies a volume of 1.5 l, what volume will a 1.2 mole sample of gas occupy at the same tem
    6·1 answer
  • A reaction generates hydrogen gas (H) as a product. The re-
    7·1 answer
  • Hey student made a model of a river in a sandbox a pile of sand represents soil and bits of rocks in the riverbed water pouring
    11·2 answers
  • A 46.6-mgmg sample of boron reacts with oxygen to form 150 mgmg of the compound boron oxide. Part A What is the empirical formul
    10·1 answer
  • C. Balance these fossil-fuel combustion reactions. (1 point)
    14·1 answer
  • What provides support and transportation of materials for a plant​
    8·2 answers
  • . Nhiệt độ ban đầu của 344 g một mẫu sắt là 18,2oC. Nếu mẫu sắt này hấp thụ 2,25 kJ nhiệt lượng thì nhiệt độ cuối của mẫu sắt nà
    14·2 answers
  • The label on a soft drink bottle gives the volume in two units: 2.0 L and 67.6 fl oz. Use this information to derive a conversio
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!