3 years ago

During which phase of the moon does a lunar eclipse occur?

1 answer:

3 0

Full moon
A lunar eclipse can occur only at full moon. A total lunar eclipse can happen only when the sun, Earth and moon are perfectly lined up — anything less than perfection creates a partial lunar eclipse or no eclipse at all.

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Based on reactivity, which of the following elements can replace aluminum (Al) in a compound during a single replacement reactio

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The answer is C. You are correct

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3 years ago

All man-made and most carbon-based compunds are___ . 1. organic 2.inorganic

KonstantinChe [14]

Answer:

2. Inorganic

Explanation:

All man-made and most carbon-based compounds are inorganic

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4 years ago

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Gifblaar is a small South African shrub and one of the most poisonous plants known because it contains fluoroacetic acid (FCH2CO

PSYCHO15rus [73]

[H_{3}O^{+}] = 0.00770 M

The equilibrium equation representing the dissociation of $FCH_{2}COOH$

$FCH_{2}COOH(aq) + H_{2}O (l) FCH_{2}COO^{-}(aq)+ H_{3}O^{+}(aq)$

Given [H_{3}O^{+}] = 0.00770 M

Let the initial concentration of acid be x and change y

So y = $[H_{3}O^{+}]$ = $[FCH_{2}COO^{-}]$ = 0.00770 M

$pK_{a} = 2.59K_{a} = 10^{-2.59} = 0.00257 M$

$K_{a} = \frac{(0.00770 M)(0.00770 M)}{x - 0.00770}$

$0.00257 = \frac{0.00005929}{x - 0.00770}$

0.00257 x - 0.00001979 = 0.00005929

x = 0.031 M

Therefore, initial concentration of the weak acid is <u>0.031 M</u>

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4 years ago

How many times greater is the rate of effusion of oxygen gas than that of carbon dioxide

elena55 [62]

1.173

hope u get 100%!!

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3 years ago

Which molecule is shown below?

antoniya [11.8K]

Answer:

D. 3-methylheptane

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3 years ago

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