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son4ous [18]
2 years ago
12

Prior to their phaseout in the 1980s, chemicals containing lead were commonly added to gasoline as anti-knocking agents. a 2.475

g sample of one such additive containing only lead, carbon, and hydrogen was burned in an oxygen rich environment. the products of the combustion were 2.694 g of co2(g) and 1.378 g of h2o(g). insert subscripts below to appropriately display the empirical formula of the gasoline additive:
Chemistry
1 answer:
KiRa [710]2 years ago
8 0
4.007-2.694 g of CO2 = 2.694 x 12 / 44 g of C = 0.7347 g of C = 0.0911 moles of C 2.050-1.378 g of H2O = 2.050 x 2 / 18 g of H = 0.1531 g and 0.1531 moles mass of Pb = 2.475 - ( 0.0911 + 0.1531) g = 2.23 g = 2.23 / 207 = 0.0108 moles 
molar ratio of C:H:Pb = 0.0911: 0.1531: 0.0108divide by the smallest number and we get 8.0: 20.0: 1.0 
empirical formula is C8H20Pb 
tetraethyl lead
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To convert the formula unit to mass, we need to divide the given formula units by Avogadro's number, 6.022 x 10^23 and we get the mole of beryllium nitrate. To convert to mass, we need to multiply the number of moles with the molecular formula of the compound which is 133.022 g/mol.The answer is 0.006185 g or 6.185 mg. 
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Which of the following statements best describes the relationships between carrying captivity in population size
Ierofanga [76]

The correct answer is letter a, whereas, carrying capacity in captivity increases population size. It is because the carrying captivity is the one responsible for having a maximum population size in which will help in sustaining the necessities that the species need in the environment in which makes it responsible for the population size to increase depending on its capacity. The correct answer is letter a.

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3 years ago
If the H3O is 4.950 x 10-12 what is the ph?
romanna [79]

Answer:

pH = 11.3

Explanation:

From the question given above, the following data were obtained:

Concentration of hydronium ion [H₃O⁺] = 4.950×10¯¹² M

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The pH of a solution is defined by the following equation:

pH = –Log [H₃O⁺]

Thus, with the above formula, we can obtain the pH of the solution as follow:

Concentration of hydronium ion [H₃O⁺] = 4.950×10¯¹² M

pH =.?

pH = –Log [H₃O⁺]

pH = –Log 4.950×10¯¹²

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2 years ago
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agasfer [191]
B) 6
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6 0
2 years ago
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An someone help me with this
valina [46]

2)c

3)b

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3 years ago
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