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serious [3.7K]
3 years ago
10

a light ray hits a hard, opaque object. the angle at which the light ray bounces off the object depends on the smoothness of the

surface. the material the surface is made of. the angle at which the light hits the surface. the source of the light that hits the surface.
Chemistry
2 answers:
kumpel [21]3 years ago
8 0
The answer would be the third option. (the angle at which the light hits the surface.)<span>
</span>
ra1l [238]3 years ago
3 0

the angle at which the light hits the surface..hope this helps :)))

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What mass of hydrochloric acid (in grams) can 2.7 g of sodium bicarbonate neutralize? (Hint: Begin by writing a balanced equatio
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Answer:

1.17 grams of HCl can neutralize 2.7 grams sodium bicarbonate

Explanation:

Step 1: Data given

Mass of sodium bicarbonate = 2.7 grams

Step 2: The balanced equation

HCl + NaHCO3 ⇔  NaCl + H2O + CO2

Step 3: Calculate moles NaHCO3

moles NaHCO3 =2.7 g / 84 g/mol= 0.032 moles

Step 4: Calculate moles HCl

For 1 mol NaHCO3 we need 1 mol HCl

For 0.032 moles NaHCO3 = 0.032 moles HCl

Step 5: Calculate mass HCl

Mass HCl = moles HCl * molar mass HCl

mass HCl = 0.032 * 36.46 g/mol= 1.17 grams

1.17 grams of HCl can neutralize 2.7 grams sodium bicarbonate

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