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DochEvi [55]
3 years ago
11

By the mid-1870s, _____ and his Standard oil company had monopolized

Chemistry
2 answers:
Lisa [10]3 years ago
8 0
A is the correct answer
lord [1]3 years ago
3 0
C. John D. Rockerfeller
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A.)49.4974874 moles or 49.5 moles
B.)2.980808730172671e+25 or 3e+25
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Which do you think could work to reduce air pollution and global warming
natka813 [3]
Recycling!! And also planting more trees.

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3 years ago
If 3.289 x 10^23 atoms of potassium react with excess water, how many grams of hydrogen gas would be produced?
GarryVolchara [31]

Answer:

The amount in grams of hydrogen gas produced is 0.551 grams

Explanation:

The parameters given are;

Number of atoms of potassium, aₙ = 3.289 × 10²³ atoms

Chemical equation for the reaction is given as follows;

2K + 2H₂O \rightarrow KOH + H₂

Avogadro's number, N_A, regarding the number of molecules or atom per mole is given s follows;

N_A = 6.02 × 10²³ atoms/mole

Therefore;

The number of moles of potassium present = 3.289 × 10²³/(6.02 × 10²³) = 0.546 moles

2 moles of potassium produces one mole of hydrogen gas, therefore;

1 moles of potassium produces 1/2 mole of hydrogen gas, and 0.546 moles of potassium will produce 0.546/2 moles of hydrogen which is 0.273 moles of hydrogen gas

The molar mass of hydrogen gas = 2.016 grams

Therefore, 0.273 moles will have a mass of 0.273×2.016 = 0.551 grams.

The amount in grams of hydrogen gas produced = 0.551 grams.

8 0
3 years ago
Photochemical smog is formed when primary pollutants interact with
ivolga24 [154]

Answer: Sunlight.

Explanation:

Photochemical smog is formed when primary pollutants such nitrogen oxides and volatile organic compound (VOC) react with sunlight, forming a brown haze above cities.

Photochemical smog can only occur during the day.

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Which substance has the highest viscosity?
Lemur [1.5K]
Room temperature has the highest viscosity
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