A. Atomic radius increases
Answer:
percentage of red skittles = 22%
percentage of skittles that are not green = 74%
Explanation:
total skittles = 50
yellow = 12
orange = 9
red = 11
green = 13
purple = 50-12-9-11-13
= 5
1) percentage of red skittles
2) percentage of skittles that are not green
Answer:
B) a pipette
Explanation:
Also known as a graduated pipette, they vary in volume, with most measuring between 0 and 25.0 mL. A small pipette can be used for precise measurement of fluids.
Answer:
The answer is in the problem
Explanation:
As general rule of number of oxygen is -2:
O → -2
Alkali metals (Li, Na, K) are always +1
Na → +1
Alkali earth methals (Be, Mg, Ca...) are always +2
Ca → +2
The halogen group (F, Cl, Br...) is always -1
F → -1
The oxidation number of Si (+/- 4)
Aluminium is, usually +3
And to complete the octet rule in nitrogen, 3 electrons are required. That means:
N → -3
Answer:
The molar mass of the gas should be 43.0 g/mol.
Explanation:
1.Use the ideal gas law() & the formula for moles and molar mass().
2.Insert the equation into and re-arrange to solve for M(molar mass).
3.Insert values and use the gas constant R = since the volume is in liters and the pressure is in atmosphere units.
4. Your answer should be 42.99 g/mol or 43.0 g/mol.
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