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ale4655 [162]
3 years ago
8

What two elements comprise most of a nebula? question 5 options: hydrogen and helium hydrogen and nitrogen oxygen and hydrogen c

arbon and hydrogen helium and lithium?
Chemistry
2 answers:
OleMash [197]3 years ago
5 0
hydrogen and helium and the most abundant elements in a nebula.
nlexa [21]3 years ago
3 0

Hydrogen and helium took the test was correct!

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g If 50.0 mL of a 0.75 M acetic acid solution is titrated with 1.0 M sodium hydroxide, what is the pH after 10.0 mL of NaOH have
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Answer:

pH = 2.66

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We<u> calculate how many acetic acid moles remain after the reaction</u>:

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We now <u>calculate the molar concentration of acetic acid after the reaction</u>:

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Then we <u>calculate [H⁺]</u>, using the<em> following formula for weak acid solutions</em>:

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