3 years ago

Coral reef are threatened today mainly because

Chemistry

2 answers:

Vinvika [58]3 years ago

8 0

Answer:

Really pollution because that includes a lot of things

Explanation:

Have a good day

STALIN [3.7K]3 years ago

6 0

Answer: Pollution.

Explanation: Humans are polluting Earth's oceans with our toxic waste and plastic garbage. This trash kills the coral reefs that exist in said oceans.

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Which of the following on the periodic table corresponds to a principal energy level?

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Answer:

representative elements

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10 POINTS

Snowcat [4.5K]

E=hc/λ =6.626×10^-34×3 ×10^8 / 3×10^7 × 10^-9 = 6.626×10 ^-24J.

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3 years ago

A 0.15 m solution of chloroacetic acid has a ph of 1.86. What is the value of ka for this acid?

dem82 [27]

Answer: $1.67\times 10^{-3}$

Explanation:

$ClCH_2COOH\rightarrow ClCH_2COO^-+H^+$

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$c-c\alpha$ $c\alpha$ $c\alpha$

So dissociation constant will be:

$K_a=\frac{(c\alpha)^{2}}{c-c\alpha}$

Given: c = 0.15 M

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$K_a$ = ?

Putting in the values we get:

Also $pH=-log[H^+]$

$1.86=-log[H^+]$

$[H^+]=0.01$

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$0.01=0.15\times \alpha$

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As $[H^+]=[ClCH_2COO^-]=0.01$

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$K_a=1.67\times 10^{-3]$

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3 years ago

From the choices provided below, list the reagent(s) in order that will react with 3-pentanone to form 3-pentanol

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3 years ago

(2 x 109) x (5 x 105).

Finger [1]

Answer:

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2*109 = 218

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218*525 = 114450

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