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LuckyWell [14K]
3 years ago
8

On a heating curve, in which section(s) would you use the equation, Q=mCΔT, to calculate the total heat required?

Chemistry
2 answers:
lana [24]3 years ago
6 0

Answer:

69.420 b=99699969

kirill [66]3 years ago
5 0
69.420 B would be your answer
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A chemist uses a standard solution of 0.210 M lithium hydroxide (LiOH) to titrate 28.10 mL of sulfurous acid acid (H2SO3), she f
erik [133]

Answer:

0.0827M of H₂SO₃

Explanation:

LiOH reacts with H₂SO₃ to produce water and Li₂SO₃, thus:

2LiOH + H₂SO₃ → 2H₂O + Li₂SO₃

<em>Where 2 moles of lithium hydroxide react with 1 mole of sulfurous acid.</em>

As the chemist requires 22.14mL = 0.02214L of a 0.210M solution to neutralize the acid, moles of LiOH are:

0.02214L × (0.210mol / L) =<em>0.004649 moles of LiOH</em>.

As 2 moles of LiOH react with 1 mole of H₂SO₃, moles of H₂SO₃ are:

0.004649 moles of LiOH ₓ (1 mole H₂SO₃ / 2 mol LiOH) =

<em>0.002325 moles of H₂SO₃</em>

These moles are present in 28.10mL = 0.02810L. Thus, molar concentration of the acid is:

0.002325 moles H₂SO₃ / 0.02810L = <em>0.0827M of H₂SO₃</em>

3 0
3 years ago
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Complete the chemical equation related to the formation of sodium chloride​
son4ous [18]

Answer:

sodium + chlorine --> sodium chloride

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3 years ago
2. How much energy is needed to heat 12 g of water from 55 to 122<br>​
nika2105 [10]

Answer:

5.4j

Explanation:

5 0
3 years ago
How do Nitrate levels vary between tap water bottled water distilled water and outdoor water?
Ganezh [65]
  • The key difference between tap water and distilled water is that tap water may contain impurities whereas distilled water does not contain impurities. Water covers more than 70% of the earth' surface. Thus, there is less than 1% of water left for direct human use.

<h2>HOPE IT HELPS!</h2>

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2 years ago
What is the osmotic pressure in atm of
Dmitrij [34]

Answer:

12.2329 atm

Explanation:

Applying

PV = nRT.................... Equation 1

Make P the subject of the equation

P = (n/V)RT................ Equation 2

Where P = Osmotic pressure, (n/V) = Molarity of urea, T = Temperature, R = molar gas constant.

From the question,

Given: (n/V) = 0.5 M, T = 25°C = (273+25) = 298 K, R = 0.0821 Latm/mol.K

Substitute these values into equation 2

P = (0.5)(298)(0.0821)

P = 12.2329 atm

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3 years ago
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