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WINSTONCH [101]
3 years ago
15

46. Which of the following is not a form of matter?

Chemistry
2 answers:
elena-s [515]3 years ago
5 0

D.

Light contains energy, Snails contain mass, and so does iron.

Mice21 [21]3 years ago
3 0
C cuz it just doesn’t make sense
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almond37 [142]

Answer:

10.5 k.J.

Explanation:

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3 years ago
WILL GIVE BRANLIEST TO WHOEVER ANSWERS THIS QUESTION>>> How many valence electrons does NaHCo3 have?
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NaHCO3

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Solid potassium chlorate decomposes upon heating to form
olga55 [171]

Answer:

32.6%

Explanation:

Equation of reaction

2KClO₃ (s) → 2KCl (s) + 3O₂ (g)

Molar mass of 2KClO₃ = 245.2 g/mol ( 122.6 × 2)

Molar volume of Oxygen at s.t.p = 22.4L / mol

since the gas was collected over water,

total pressure = pressure of water vapor + pressure of  oxygen gas

0.976 = 0.04184211 atm + pressure of oxygen gas at 30°C

pressure of oxygen = 0.976 - 0.04184211 = 0.9341579 atm = P1

P2 = 1 atm, V1 = 789ml, V2 = unknown, T1 = 303K, T2 = 273k at s.t.p

Using ideal gas equation

\frac{P1V1}{T1} = \frac{P2V2}{T2}

V2 = \frac{P1V1T2}{T1P2}

V2 = 664.1052 ml

245.2   yielded 67.2 molar volume of oxygen

0.66411 will yield = \frac{245.2 * 0.66411}{67.2}  = 2.4232 g

percentage of potassium chlorate in the original mixture = \frac{2.4232 * 100}{7.44} = 32.6%

3 0
3 years ago
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Answer: option C) II < III < I

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First, obtain the pH value of I and II, then compare both with III.

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For II

pOH = - log(OH-)

= - log(1x10−10)

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For III

pH = 6

Since, pH range from 1 to 14, with values below 7 to be acidic, 7 to be neutral, above 7 to be alkaline: then, 9 < 6 < 4

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6 0
3 years ago
Both protons and neutrons (and their anti-particles) froze out:
VladimirAG [237]
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