If 3.85 moles of aluminum (Al) metal, with a density of 2.70 g/mL, are needed for a chemical reaction, how many milliliters of aluminum are needed?Select one:
a. 1.43 mL Al
b. 18.9 mL Al
c. 38.5 mL Al
d. 281 mL Al

Answers

Answer 1

Answer: To find mL of Al needed, start by finding grams of Al that are being used in this reaction:
(3.85mol Al)(27.0g/mol Al)= 104g Al needed.

Since density is m/v, and we know the density and the mass, we can find the volume:
2.70g/mL = (104.g)/mL
Isolate mL:
(104.g)/(2.70g/mL) = 38.5mL needed which is answer C :)

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True or False: Wind can cause ocean currents

Answers

Answer:

true

Explanation:

Answer:

True the wind causes waves in the ocean

Explanation:

Which region of the visible light spectrum bends the most when passed through a diffraction grating?Red
Yellow
Green
Blue

Answers

Answer:

Red

Explanation:

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A solution has a [OH-] = 8.6 x 10-5. Answer the following questions.

pOH =
pH =
[H+] =

Answers

Answer: pOH= 4.06

pH= 9.94

$[H^+]=1.14* 10^(-10)M$

Explanation: pOH is the negative logarithm of $OH^-$ concentration.

pH is the negative logarithm of $H^+$ concentration.

$pOH=-log[OH^-]$

$pOH=-log[8.6* 10^(-5)]=4.06$

2) $pH+pOH=14$

$pH=14-4.06$

$pH=9.94$

3) $pH=-log[H^+]$

$9.94=-log[H^+]$

$[H^+]=1.14* 10^(-10)M$

pOH = 4
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[H+] = 1 X 10^-10

Aqueous solutions of this ion give a reddish precipitate when excess hydroxide ion is added.(A) Cu^{2+}
(B) CO₃^{2−}
(C) Fe^{3+}
(D) Al^{3+}
(E) Pb^{2+}

Answers

Fe ^3+ is the correct answer

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Answers

D. Stratum Corneum

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