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AnnyKZ [126]
3 years ago
12

اريد اجابتهم الذي بصوره وشكرا

Chemistry
1 answer:
11Alexandr11 [23.1K]3 years ago
5 0

Answer:

ummm is the language urdu?????

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The heat of combustion (∆H) for an unknown hydrocarbon is -8.21 kJ/mol. If 0.424 mol of the hydrocarbon is burned in a bomb calo
klio [65]

When 0.424 moles of an unknown hydrocarbon (∆Hc = -8.21 kJ/mol) is burned in a bomb calorimeter (C = 1.12 kJ/°C), the change in the temperature is 3.10 °C.

The heat of combustion (∆Hc) for an unknown hydrocarbon is -8.21 kJ/mol. The heat released by the combustion of 0.424 moles of the hydrocarbon is:

Qc = 0.424 mol \times \frac{(-8.21kJ)}{mol} = -3.48 kJ

According to the law of conservation of energy, the sum of the heat released by the combustion (Qc) and the heat absorbed by the bomb calorimeter (Qb) is zero.

Qc + Qb = 0\\\\Qb = -Qc = 3.48 kJ

Given the heat absorbed by the bomb calorimeter (Qb) and the heat capacity of the bomb calorimeter (C), we can calculate the temperature change (ΔT) using the following expression.

Qb = C \times \Delta T\\\\\Delta T = \frac{Qb}{C} = \frac{3.48 kJ}{1.12 kJ/\° C } = 3.10 \° C

When 0.424 moles of an unknown hydrocarbon (∆Hc = -8.21 kJ/mol) is burned in a bomb calorimeter (C = 1.12 kJ/°C), the change in the temperature is 3.10 °C.

Learn more: brainly.com/question/24245395

8 0
3 years ago
Which of the following methods would best separate sand and water?
labwork [276]

Answer:

filtering

Explanation:

fil·ter

/ˈfiltər/

Learn to pronounce

verb

gerund or present participle: filtering

pass (a liquid, gas, light, or sound) through a device to remove unwanted material.

"the patient is hooked up to a dialysis machine twice a week to filter out the cholesterol in the blood"

synonyms: sieve, strain, sift, filtrate, riddle; More

process or assess (items) in order to reject those that are unwanted.

"you'll be put through to a secretary whose job it is to filter calls"

process or treat with a filter.

4 0
3 years ago
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Adenosine triphosphate, or ATP, is primarily used as _______ in living organisms.
Stolb23 [73]
It is primarily used as a way to supply  energy to other cells
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3 years ago
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Q2.
Serga [27]

Answer:

266 liters Carbon iv oxide will be formed

Explanation:

The first thing we need to do here is to calculate the number of moles of oxygen reacted.

This can be calculated using the ideal gas equation;

Mathematically;

PV = nRT

From the question;

P = pressure = 10.5 atm

V = volume = 400 liters

n = number of moles = ?

T = temperature = 125 + 273 = 398K

R = molar gas constant = 0.0821 L•atm•K^-1•mol^-1

Substituting these values, we have ;

n = PV/RT

n = (10.25 * 400)/(398 * 0.0821) = 125 moles

From the question;

15 moles oxygen gave 10 moles CO2

125 moles oxygen will give x moles CO2

x = (125 * 10)/15 = 83 moles

Now, we want to know the volume of CO2, present in 83 moles using the given reaction conditions.

Mathematically;

PV = nRT

V = nRT/P

= (83 * 0.0821 * 398)/10.25 = 265.65 which is approximately 266 Liters

4 0
3 years ago
A Solute is the part of the mixture that is<br> A. dissolved<br> B.used to dissolve a substance
8_murik_8 [283]
It is the thing being dissolved!!
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