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motikmotik
3 years ago
5

Match the terms to their descriptions. proton

Chemistry
1 answer:
Sveta_85 [38]3 years ago
7 0

Answer:

proton - 5

electron - 4

electron cloud - 3

valence electron - 7

valence shell - 2

isotopes - 1

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How many grams of water will be produced if you start with 4.0 grams of hydrogen and an excess of oxygen given the following bal
Ivahew [28]

Answer:

B.) 36.0 grams

Explanation:

To find the mass of water, you need to (1) convert grams H₂ to moles (using the molar mass), then (2) convert moles H₂ to moles H₂O (using mole-to-mole ratio from reaction coefficients), and then (3) convert moles H₂O to grams (using the molar mass). It is important to arrange the conversions in a way that allows for the cancellation of units.

Molar Mass (H₂): 2(1.008 g/mol)

Molar Mass (H₂): 2.016 g/mol

Molar Mass (H₂O): 2(1.008 g/mol) + 15.998 g/mol

Molar Mass (H₂O): 18.014 g/mol

2 H₂ + O₂ -----> 2 H₂O
^                        ^

4.0 g H₂            1 mole             2 moles H₂O           18.014 g
---------------  x  ----------------  x  ------------------------  x  ---------------  = 36 g H₂O
                          2.016 g             2 moles H₂              1 mole

3 0
1 year ago
The rate constant for the first-order decomposition at 45 °C of dinitrogen pentoxide, N2O5, dissolved in chloroform, CHCl3, is 6
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Answer:

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Rate = 6.2×10-4[0.4]²= 9.92×10-5M² min-1

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Genetic variation is important to the population's ability to survive in different situations that affect natural selection.  

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