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arsen [322]
3 years ago
5

When was the speed of light first accurately calculated?

Chemistry
2 answers:
VikaD [51]3 years ago
7 0
A becuse i reamber somthing about a <span>lanterns or d </span>
Agata [3.3K]3 years ago
4 0

B. When Roemer used the eclipsed moons of Jupiter along with Earth's orbit around the Sun to compare different speeds over time.

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Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory as a primary standard. It has the unw
Sauron [17]

Answer:

0.1472 mol/L is the concentration of the barium hydroxide solution.

Explanation:

2KHC_8H_4O_4+Ba(OH)_2\rightarrow Ba(KC_8H_4O_4)_2+2H_2O

Mass of potassium hydrogen phthalate = 2.050 g

Molar mass of potassium hydrogen phthalate = \frac{2.050 g}{204.2 g/mol}=0.01004 mol

According to reaction , 2 moles of potassium hydrogen phthalate reacts with 1 mole of barium hydroxide, then 0.01004 moles of potassium hydrogen phthalate will :

\frac{1}{2}\times 0.01004 mol=0.005020 mol of barium hydroxide

Moles of barium hydroxide = 0.005020 mol

Volume of the barium hydroxide solution = 34.10 mL = 0.03410 L

1 mL = 0.001 L

Molarity=\frac{Moles}{Volume(L)}

Molarity of the barium hydroxiude silution :

=\frac{0.005020 mol}{0.03410 L}=0.1472 mol/L

0.1472 mol/L is the concentration of the barium hydroxide solution.

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3 years ago
Because of the way Saturn is tilted,the planet experiences four different seasons. If each season lasts an equal amount of time,
madam [21]

Answer LIL TOP

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3 years ago
Salt is the product formed by a reaction in which _______ atoms of an acid are replaced by the atoms of a metal.
UkoKoshka [18]
<span>Salt is the product formed by a reaction in which the hydrogen atoms of an acid are replaced by the atoms of a metal. The salt is formed as a result of the neutralization of the acid by base, that is the metal or positive ion replace the hydrogen ion in the acid. For instance: NaO + H2SO4 = NaSO4 + H2O. In this example, Na [sodium] has replaced the hydrogen in H2SO4, thereby forming the salt NaSO4.</span>
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describe characteristics of different climate zones as they relate to latitude,elevation,and proximity to bodies of water. (scie
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Using the chemical equation below, how many moles of Al2O3 produce when 105 grams of Al are reacted? 2Al+Fe2O3 —&gt; Al2O3+2Fe
topjm [15]

Answer:

1.94

Explanation:

moles = mass/Mr so you have 3.889 moles of aluminium, but because the ratio in the equation is 2:1 you need to halve it.

4 0
3 years ago
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