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mr_godi [17]
3 years ago
11

20 points and brainliest for best answer

Chemistry
2 answers:
notka56 [123]3 years ago
8 0
You can find the atomic mass of each on any standard periodic table.
Gold (Au): 196.97
Potassium (K): 39.098
Francium (Fr): 223
Copper (Cu): 63.546
Bromine (Br): 79.904
Arsenic (As): 74.992
Uranium (U): 238.03
Chromium (Cr): 51.996
Mercury(Hg): 200.59
Hydrogen (H): 1.008

~I hope this helps!~
RSB [31]3 years ago
7 0
Gold/Atomic mass

196.96657 u ± 0.000004 u

Potassium/Atomic mass

39.0983 u ± 0.0001 u

Francium/Atomic number

87

Copper/Atomic mass

63.546 u ± 0.003 u


Bromine/Atomic mass

79.904 u ± 0.001 u


Arsenic/Atomic number

33


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An air/gasoline vapor mix in an automobile cylinder has an initial temperature of 180 ∘C and a volume of 13 cm3 . If the mixture
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Answer:

The final volume will be 24.7 cm³

Explanation:

<u>Step 1:</u> Data given:

Initial temperature = 180 °C

initial volume = 13 cm³ = 13 mL

The mixture is heated to a fina,l temperature of 587 °C

Pressure and amount = constant

<u>Step 2: </u>Calculate final volume

V1/T1 = V2/T2

with V1 = the initial volume V1 = 13 mL = 13*10^-3

with T1 = the initial temperature = 180 °C = 453 Kelvin

with V2 = the final volume = TO BE DETERMINED

with T2 = the final temperature = 587 °C = 860 Kelvin

V2 = (V1*T2)/T1

V2 = (13 mL *860 Kelvin) /453 Kelvin

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5 0
3 years ago
Should couples wanting to start a family undergo genetic testing to minimize risk to their offspring
uysha [10]

Answer:

Yes

Explanation:

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Problem page a virus has a mass of ×9.010−12mg and an oil tanker has a mass of ×3.0107kg . use this information to answer the qu
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In correct number of significant figures, the answer would only have to be 5.4 x 10^12 mg. 

b. The number of moles of the virus that will have the same mass as the oil tanker is calculated by dividing the mass of the oil tanker by the mass of one mole of the virus. Note that doing division, both would have to have the same units. 

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Simplifying,
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In correct number of significant figures, the answer is 6.0. 
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