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ChemistryChemistry
Madeleine Ortega
What is the empirical formula for C5H1102? *

A. C10H2202

B. C5H110

C. C5H1102

D. C2H110
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ChemistryChemistry
Isiah Riggs
Who invented carbon element?
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ChemistryChemistry
Aditya Sloan
Which compound makes up nearly 30% of the "aroma" from human sweat?
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ChemistryChemistry
Buster
4. a) The enthalpy change of combustion of hexane was measured using a calorimeter containing 200 cm3 of water; 0.5g of hexane (C6H14) was burnt. The temperature of the water increased by 30 K.

Calculate the enthalpy change of combustion of hexane.

(c=4.18 Jg - 1K-1).

Give your answer in kJ mol-1.

I got - 24794kjmol-1 as combustion for hexane. Do you need to do anything else for the question?

bond values (from previous question):

c-c 347

c-h 413

c=o 805

o-h 464
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ChemistryChemistry
Luka Oconnell
How many of each atom is present in the product ag2s
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ChemistryChemistry
Jayce
The nutritional information on a cereal box shows that one serving of dry cereal has 90 calories (actually kilocalories). If one were to burn a serving of cereal, the amount of heat given off would be sufficient to raise the temperature of 1 kg of water in how many degrees Celsius?
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ChemistryChemistry
Alessandro Miller
What method will speed up a chemical reaction? apply heat

avoid grinding the substance

decrease the concentration of the reactants
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ChemistryChemistry
Georgia Barrett
A blood sample is diluted by placing 0.2ml of the blood in a tube and filling the tube to the 5ml mark with a solution. what percent of the solution represents whole blood?
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ChemistryChemistry
Rodrigo Choi
What are desirable characteristics of a barium suspension? 1. Rapid flow 2. Thick layering 3. Good mucosal adhesion
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ChemistryChemistry
Winston
What do you expect will occur as air masses move over cold locations? Hot locations? How does this movement of air masses affect climate? ap environmental science
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ChemistryChemistry
Valentina Acevedo
Why don't we use gram or nanogram for example instead of the mol?

What is it's benefit?

I can't remember that ...
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ChemistryChemistry
Gilberto Gillespie
Is ice and salt endothermic or exothermic
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ChemistryChemistry
Jeffrey David
How many moles of CO are produced when 35.0 mol C2H2 react completely
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ChemistryChemistry
Yosef Stuart
Read the following chemical equation: Ti + 2Cl2 → TiCl4 Which statement best identifies and describes the reducing agent in the reaction?

Ti is the reducing agent because it changes from + 4 to 0 oxidation state.

Ti is the reducing agent because it changes from 0 to + 4 oxidation state.

Cl2 is the reducing agent because it changes from - 4 to 0 oxidation state.

Cl2 is the reducing agent because it changes from 0 to - 4 oxidation state.
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ChemistryChemistry
Antoine
If a reaction has an equilibrium constant just greater than 1, what type of reaction is it?
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