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3 years ago

6

Katerina is going to perform a reaction between Hydrochloric Acid (HCl) and solid Zinc. She needs to use 5 mols of HCl, how many

grams of HCl should she use?

1 answer:

chubhunter [2.5K]3 years ago

8 0

Answer:

182.3 g

Explanation:

number of mols of HCl = 5 mols

molecular weight of HCl = 36.46 g/mol

m = mass of HCl = number of mols x molecular weight

m = 5 mols * 36.46 g/mol

m = 182.3 g

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How much energy would it take to heat a section of the copper tubing that weighs about 665.0 g, from 15.71 ∘C to 27.09 ∘C ? Copp

Margarita [4]

Answer:

2914 J

Explanation:

Step 1: Given data

Mass of the copper tubing (m): 665.0 g

Initial temperature: 15.71 °C

Final temperature: 27.09 °C

Specific heat of copper (c): 0.3850 J/g.°C

Step 2: Calculate the temperature change

ΔT = 27.09 °C - 15.71 °C = 11.38 °C

Step 3: Calculate the energy required (Q)

We will use the following expression.

Q = c × m × ΔT

Q = 0.3850 J/g.°C × 665.0 g × 11.38 °C

Q = 2914 J

3 0

3 years ago

Can sum1 please help me? if u can

kiruha [24]

Answer:

donde estan las preguntas

Explanation:

6 0

3 years ago

An aqueous solution of perchloric acid is standardized by titration with a 0.191 M solution of barium hydroxide. If 13.8 mL of b

WARRIOR [948]

Answer:

Molarity of $HClO_{4}$ solution is 0.311 M

Explanation:

Neutralization reaction: $2HClO_{4}+Ba(OH)_{2}\rightarrow Ba(ClO_{4})_{2}+2H_{2}O$

According to balanced reaction, 1 mol of $Ba(OH)_{2}$ neutralizes 2 moles of $HClO_{4}$

Number of moles of $Ba(OH)_{2}$ in 13.8 mL of 0.191 M $Ba(OH)_{2}$ solution = $\frac{0.191}{1000}\times 13.8moles$ = $0.00264moles$

Let's assume molarity of $HClO_{4}$ solution is C (M) then-

Number of moles of $HClO_{4}$ in 17.0 mL of C (M) $HClO_{4}$ solution = $\frac{C}{1000}\times 17.0moles$ = $0.017Cmoles$

Hence, $0.017C=(2\times 0.00264)$

or, $C=0.311$

So, molarity of $HClO_{4}$ solution is 0.311 M

3 0

3 years ago

What element has atoms that can form halide ions?

Jet001 [13]

A halide ion is a halogen atom bearing a negative charge. The halide anions are fluoride (F−), chloride (Cl−), bromide (Br−), iodide (I−) and astatide (At−). Such ions are present in all ionic halide salts. Halide minerals contain halides.

8 0

3 years ago

How do you convert from atoms to moles

zvonat [6]

To convert from atoms to moles, divide the atom amount by Avogadro's number (or multiply by its reciprocal).

6 0

3 years ago

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