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2 years ago

If 7.83 g of H 2 is reacted with 15.7 g of O 2 in the reaction 2H2 + O2 → 2H2O , what is the limiting reagent?

1 answer:

8 0

When you take 7.83 g of H2, you convert to moles by dividing by the molar mass (2.02) and multiply by the number of H2s over H2Os. Then do the same for the O2. the limiting reagent in this case is the Oxygen by what I calculated.

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Which of the following compounds share electrons? NaCl CO CsF KBr

ArbitrLikvidat [17]

Covalent compounds share with each other, whilst Ionic compounds take from each other.

Covalent compounds are composed of 2 or more NONMETALS.

So, it would be CO, since the rest of the compounds contain metals in them.

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3 years ago

At constant P and n, T decreases at V is?

goblinko [34]

Answer:

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2 years ago

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sukhopar [10]

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2 years ago

What challenges would you encounter with the titration if you had used apple cider vinegar or balsamic vinegar as the analyte in

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Explanation:

Apple cider vinegar or balsamic vinegar might contain various synthetics which might interact with or nullified the findings, whereas white vinegar comprises of acidic acid only. In fact, apple cider vinegar and balsamic vinegar are deep in appearance this would make it very difficult to determine the color. This is why it is preferable to use white vinegar in the Titration process.

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3 years ago

Need help with 22 and 24

choli [55]

Answer:

22:

Formular:

$atomic \: mass = \frac{ \sum(isotopic \: mass \times \%abundance)}{100} \\$

substitute:

$atomic \: mass = \frac{(23.985 \times 78.70) + (24.986 \times 10.13) + (25.983 \times 11.17)}{100} \\ \\ = \frac{(1887.620) + (253.108) + (290.230)}{100} \\ \\ = \frac{2430.958}{100} \\ \\ { \boxed{ \boxed{average \: atomic \: mass = 24.3 \: amu}}}$

23:

Same element is represented by same number of protons. 

Answer:

6 protons. 6 protons

7 neutrons. 8 neutrons

6 electrons. 6 electrons

Note: Atoms with same proton number but different mass number are called isotopes

5 0

2 years ago

Read 2 more answers