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bonufazy [111]
3 years ago
9

This word means that one event happens at the same time as another event

Chemistry
1 answer:
Kamila [148]3 years ago
5 0

Answer:

Meanwhile

Explanation:

Think of a comic book, or a superhero show, you usually see the protagonist, or the hero, doing something like saving an innocent pedestrian, or helping a little old lady across a street, then the screen will flash and say 'meanwhile' which means while this was happening, this was <em>also</em> happening.

An example could be in The Wizard of Oz, when Dorothy is walking with her friends through The Haunted Forest, you see the Wicked Witch of the East, peering through her crystal ball, unto Dorothy. To summarize what was happening you could say,

'Meanwhile, as Dorothy and her friends walked through The Haunted Forest, The Wicked Witch watched their stroll.'

Really hopes this helps!

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3 years ago
You have 1.0 mole of each compound below. which has the greatest mass?
kramer
(a) Iron (iii) sulphate:
From the periodic table:
mass of iron = 55.845 grams
mass of sulphur = 32.065 grams
mass of oxygen = 16 grams
Iron (iii) sulphate has the formula: Fe2(SO4)3
molar mass = 2(55.845) + 3(32.065) + 3(4)(16) = 399.885 grams

(b) Sodium hydroxide:
From the periodic table:
mass of sodium = 22.989 grams
mass of oxygen = 16 grams
mass of hydrogen = 1 gram
Sodium hydroxide has the formula: NaOH
molar mass = 22.989 + 16 + 1 = 39.989 grams

(c) Barium carbonate
From the periodic table:
mass of barium = 137.327 grams
mass of carbon = 12 grams
mass of oxygen = 16 grams
Barium carbonate has the formula: BaCO3
molar mass = 137.327 + 12 + 3(16) = 197.327 grams

(d) ammonium nitrate:
From the periodic table:
mass of nitrogen = 14 grams
mass of hydrogen = 1 gram
mass of oxygen = 16 grams
Ammonium nitrate has the formula: NH4NO3
molar mass = 14 + 4(1) + 14 + 3(16) = 80 grams

(e) Lead (iv) oxide
From the periodic table:
mass of lead = 207.2 grams
mass of oxygen = 16 grams
Lead (iv) oxide has the formula: PbO2
molar mass = 207.2 + 2(16) = 239.2 grams

From the above calculations, we can see that:
Iron (iii) sulphate has the greatest mass.
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3 years ago
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