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Dennis_Churaev [7]
3 years ago
14

A change of state does not affect an object's what?

Chemistry
1 answer:
DedPeter [7]3 years ago
3 0

Answer:

mass.

Explanation:

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. When 400 grams of wood are burned, 30 grams of ash remain. What happened to the missing 370 grams of matter?
tiny-mole [99]
When wood id burnt, 30 grams of ash are formed due to the chemical changes that occurred.
The missing 370 grams are evaporated into the air where they form other particles and substances.
3 0
4 years ago
A combustion reaction occurs between one molecule of methane (CHa) and two molecules of oxygen (O2).
SCORPION-xisa [38]

The total number of atoms make up the products :

D) 1 carbon, 4 hydrogen, and 4 oxygen

<h3>Further explanation </h3>

Complete combustion of Hydrocarbons with Oxygen will produce CO₂ and H₂O compounds.

If O₂ is insufficient there will be incomplete combustion produced by CO and H and O

Hydrocarbon combustion reactions (especially alkanes)

For combustion of methane (CH₄) and two molecules of oxygen (O₂).

\tt CH_4+2O_2\rightarrow CO_2+2H_2O

The number of atoms make up the products

CO₂ : 1 carbon, 2 oxygen

2H₂O : 4 hydrogen , 2 oxygen

4 0
3 years ago
Which chemical equation is correctly balanced?
AlladinOne [14]
 <span> 2KCl(s) => 2K(s) + Cl2(g) </span>is correctly balanced. Becuase <span>2 K, 2 Cl on the left, and 2 K, 2 Cl on the right.</span>
4 0
3 years ago
Read 2 more answers
What is the pH of an acetic acid solution where the concentration of acetic acid is 2 mM and the concentration of sodium acetate
schepotkina [342]

Answer:

pH = 5.76

Explanation:

We can solve this problem by using<em> Henderson-Hasselbach's equation</em>:

pH = pKa + log\frac{[SodiumAcetate]}{[AceticAcid]}

We are already know all the required information, thus we<u> input the data given by the problem</u>:

pH = 4.76 + log(20/2)

And finally <u>calculate the pH</u>:

pH = 5.76

The pH of that acetic acid solution is 5.76.

6 0
3 years ago
A/1 * B/C = D
Anit [1.1K]

Answer: 0.64 Moles of Propane

Explanation:

Data:

        Moles of Carbon  =  1.5 mol

        Conversion factor  =  7 mol C produces = 3 mol of Propane

Solution:

            As we know,

               7 moles of Carbon produces =  3 moles of Propane

Then,

           1.5 moles of Carbon will produce  =  X moles of Propane

Solving for X,

                    X =  (1.5 moles × 3 moles) ÷ 7 moles

                    X  =  0.6428571 moles of Propane

Or rounded to two significant figures,

                    X =  0.64 Moles of Propane

Read more on Brainly.com - brainly.com/question/11464115#readmore

3 0
3 years ago
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