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Darya [45]
3 years ago
8

How many atoms are in 187.6 grams of the alloy?

Chemistry
2 answers:
Ad libitum [116K]3 years ago
8 0
13 Al Aluminum Atomic mass 26.982
DerKrebs [107]3 years ago
4 0
26.982 is the answer
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the answer is B. Atmosphere

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The combustion method used to analyze for carbon and hydrogen can be adapted to give percentage N by collecting the nitrogen fro
12345 [234]

Answer:

The percentage of N in the compound is 0.5088

Explanation:

Mass of compound = 8.75 mg = 8.75×1000 = 8750 g

Mass of N2 = number of moles of N2 × MW of N2 = 1.59 × 28 = 44.52 g

% of N in the compound = (mass of N2/mass of compound) × 100 = (44.52/8750) × 100 = 5.088×10^-3 × 100 = 0.5088

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3 years ago
According to valence bond theory, which orbitals overlap in the formation of the bond in HCl?
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A) 1s on H and 3p on Cl

In HCl, the H atom has only one valance electron. Each share an electron an therefore a single covalent bond is formed between the two. The bond in HCl is therefore a result of an overlap between 1s orbital and ONLY ONE of the lobes of the 3p orbital of Chlorine.
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3 years ago
At a certain temperature the vapor pressure of pure heptane C7H16 is measured to be 454.mmHg. Suppose a solution is prepared by
OlgaM077 [116]

Answer:

Mass of heptane = 102g

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the partial pressure of heptane vapor above this solution = 462mmHg

5 0
3 years ago
Calculate the atomic mass of silicon. The three silicon isotopes have atomic masses and relative abundances of 27.9769 amu (92.2
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3 years ago
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