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sweet-ann [11.9K]
2 years ago
10

Which of the following would DECREASE the rate of a reaction?

Chemistry
1 answer:
tia_tia [17]2 years ago
8 0

Answer: increasing volume

Explanation: adding a catalyst would increase reaction time and increasing  INCREASING concentration definently makes reaction time alot faster increasing pressure actually makes it more concentrated, so no it is not

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The normal freezing point of a certain liquid Xis-7.30°C but when l02. g of iron(III) chloride (FeCl3) are dissolved in 650. g o
IRISSAK [1]

Answer:

2.7 °C.kg/mol

Explanation:

Step 1: Calculate the freezing point depression (ΔT)

The normal freezing point of a certain liquid X is-7.30°C and the solution freezes at -9.9°C instead. The freezing point depression is:

ΔT = -7.30 °C - (-9.9 °C) = 2.6 °C

Step 2: Calculate the molality of the solution (b)

We will use the following expression.

b = mass of solute / molar mass of solute × kilograms of solvent

b = 102. g / (162.2 g/mol) × 0.650 kg = 0.967 mol/kg

Step 3: Calculate the molal freezing point depression constant Kf of X

Freezing point depression is a colligative property. It can be calculated using the following expression.

ΔT = Kf × b

Kf = ΔT / b

Kf = 2.6 °C / (0.967 mol/kg) = 2.7 °C.kg/mol

7 0
2 years ago
What is an "alloy" in the chapter of metals in chemistry??
avanturin [10]
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3 years ago
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Scientist think that many species have one common ancestor. Which answer choice best tells why scientists think this way?
BigorU [14]

Answer:

homologous structures.

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3 years ago
Vapor pressure is related to the temperature of the liquid. true or false.
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let the actual height of car be x

now, according to question,

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5 0
2 years ago
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