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Sliva [168]
2 years ago
5

Fill in the coefficients that will balance the following reaction: __H2+__O2 —> __H₂O

Chemistry
2 answers:
jolli1 [7]2 years ago
8 0

Answer:

2H2+1O2—>2H2O

Explanation:

2H2+1O2—>2H2O

monitta2 years ago
8 0

Answer:

2H2+1O2-> 2H2O

Explanation:

2h2= 4 hydrogens

1o2= 2 oxygens

///

2 h2O= 4 hydrogens and 2 oxygens

// they are balanced

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294 g of potassium dichromate contains 52 g of chromium and 39 g of potassium. What is the mass percent of oxygen in the compoun
xenn [34]
The answer is 69.048%.

Mass of potassium dichromate (K₂Cr₂O₇) is 294 g, which is a 100%.

Given mass of chromium is 52 g. So, the mass percent of chromium in the compound is 17.687%:
52 g : x% = 294 g : 100%
x = 52 ÷ 294 × 100 %
x = 17.687%

Given mass of potassium is 39 g. <span>So, the mass percent of potassium in the compound is 13.265%:
39 g : x% = 294 g : 100%
x = </span>39 ÷ <span>294 × 100 %
x = 13.265%

Therefore, </span>the mass percent of oxygen in the compound is <span>69.048%:
100% - </span>17.687% - <span>13.265% = 69.048%.</span>
5 0
4 years ago
What is the mass of 2.053 moles of silver nitrate?
Verizon [17]

Answer:

Explanation:

Silver nitrate grams to moles

1 grams Silver Nitrate is equal to 0.0058867472248402 mole

8 0
3 years ago
Bromine has two naturally occurring isotopes. Bromine-79 has a mass of 78.918 amu and is 50.69% abundant. Using the atomic mass
dsp73

Explanation:

Given parameters:

Mass of Br-79 = 78.918 amu

Abundance = 50.69%

Unknown:

Mass of Br - 81 = ?

Solution:

Relative Atomic mass of Br  = 80

The proportion by which each fraction of an isotope occurs in nature is called the geonormal abundance.

   RAM =  Ma Ba     +      McBc

  The formula above is used to find the average mass of the given isotopes.

Since we know the percentage abundance of Br-79, that of Br-81 = 100-50.69= 49.31%

  RAM =  Ma Ba     +      McBc

RAM = relative atomic mass

   Ma Ba = mass and abundance of Br-79

    McBc = mass and abundance of Br-81

     80 = (78.918 x \frac{50.69}{100}   )    +    ( \frac{49.31}{100} x C)

    80 =  40 + 0.49C

        0.49C = 40

                C = \frac{40}{0.49}   = 81.63amu

learn more;

Isotopes brainly.com/question/10862182

#learnwithBrainly

6 0
3 years ago
Two examples of decomposers​
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Fungi and bacteria-- mushrooms, bacteria, mold...

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Which is the correct Lewis dot structure of NH2?
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Answer:

D

Explanation:

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