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3 years ago

Why is oxygen written with a subscript 2 in CO2?

Chemistry

2 answers:

Alexeev081 [22]3 years ago

6 0

Answer:

Explanation:

the answer is b

Ronch [10]3 years ago

6 0

the answer is b because C+o2

c= carbon, o= oxygen

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How many moles of KCIO3 are required to produce 58.3 grams of 02? 2 KCIO3 —> 2 KCI + 3 O2

strojnjashka [21]

Answer:

1.21 mol KClO₃

General Formulas and Concepts:

Atomic Structure

Reading a Periodic Table
Moles
Mole Ratio

Stoichiometry

Analyzing reactions rxn
Using Dimensional Analysis

Explanation:

Step 1: Define

Identify variables

[rxn] 2KClO₃ → 2KCl + 3O₂

[Given] 58.3 g O₂

[Solve] mol KClO₃

Step 2: Identify Conversions

[rxn] 2 mol KClO₃ → 3 mol O₂

[PT] Molar Mass of O: 16.00 g/mol

Molar Mass of O₂: 2(16.00) = 32.00 g/mol

Step 3: Convert

[DA] Set up: $\displaystyle 58.3 \ g \ O_2(\frac{1 \ mol \ O_2}{32.00 \ g \ O_2})(\frac{2 \ mol \ KClO_3}{3 \ mol \ O_2})$
[DA] Divide/Multiply [Cancel out units]: $\displaystyle 1.21458 \ mol \ KClO_3$

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

1.21458 mol KClO₃ ≈ 1.21 mol KClO₃

6 0

3 years ago

Which of the following statements is false?

natka813 [3]

Answer:

Explanation:

I think B is false because you should communicate with all sorts of people, in order to learn different views/sides of something.

3 0

3 years ago

What mass of HBO2 is produced from the combustion of 139.5 g of B2H6? Answer in units of g.

aliina [53]

Answer:

$m_{HBO_2}=441.8gHBO_2$

Explanation:

Hello there!

In this case, since the combustion of B2H6 is:

$B_2H_6+3O_2\rightarrow 2HBO_2+2H_2O$

Thus, since there is 1:2 mole ratio between the reactant and product, the produced grams of the latter is:

$m_{HBO_2}=139.5gB_2H_6*\frac{1molB_2H_6}{27.67gB_2H_6} *\frac{2molHBO_2}{1molB_2H_6} *\frac{43.82gHBO_2}{1molHBO_2}$

$m_{HBO_2}=441.8gHBO_2$

Best regards!

5 0

2 years ago

Identify the units used to measure volume mass.

Strike441 [17]

Answer:

The metric system uses units such as meter, liter, and gram to measure length, liquid volume, and mass, just as the U.S. customary system uses feet, quarts, and ounces to measure these.

Volume: 1 liter is a little more than 1 quart

Mass: 1 kilogram is a little more than 2 pounds

Length: 1 centimeter is a little less than half an

Explanation:

3 0

2 years ago

Why is a changing ocean temperature of only one or 2 degrees so concerning? Please help!!!!

Svetllana [295]

Because it throws the earth off balance and if it does it often enough then it will soon add up.

6 0

3 years ago

Read 2 more answers