# ONLY QUESTION NUMBER 3:

Get college assignment help at uniessay writers ONLY QUESTION NUMBER 3:

## What minimum mass of water (in g) has to evaporate to

What minimum mass of water (in g) has to evaporate to absorb 175 kj of heat?

## A mixture containing KClO3, K2CO3, KHCO3 and KCl was heated producing

A mixture containing KClO3, K2CO3, KHCO3 and KCl was heated producing CO2, O2, and H2O gases according to the following equations: 2 KClO3(s) –> 2KCl 3 O2(g) 2 KHCO3(s) –> K2O(s) H2O(g) 2 CO2(g) K2CO3(s) –> K2O(s) CO2(g) The KCl does not react under the conditions of the reaction. If 100.0 grams of the mixture produces 1.80grams of H2O, 13.80 grams of CO2, and 4.00 grams of O2, what was the composition of the original mixture? Assume complete decomposition of the original mixture.

## When measuring the initial rates of a reaction at different starting

When measuring the initial rates of a reaction at different starting reactant concentrations, one should make the time interval proportional to the magnitude of the concentration change. (True or False)

## A differential rate law: A) gives the difference between reactant and

A differential rate law: A) gives the difference between reactant and product concentrations vs. time. B) shows how the rate of a reaction depends on concentrations. C) shows how the concentrations of species depend on time. D) is not generally considered interchangeable with “rate law”

## The change in reactant concentration over a small time interval t-t0

The change in reactant concentration over a small time interval t-t0 is a linear function initial reactant concentration. (True or False)

## How fast must a 130. g baseball travel in order to

How fast must a 130. g baseball travel in order to have a de Broglie wavelength that is equal to that of an x-ray photon with = 100. pm?

## A fixed quantity of gas at 21^circ C exhibits a pressure

A fixed quantity of gas at 21^circ C exhibits a pressure of 725 torr and occupies a volume of 4.32 L. Use Charles’s law to calculate the volume the gas will occupy if the temperature is increased to 175^circ C while the pressure is held constant.

## Assume that in each pair of compounds be- low the type

Assume that in each pair of compounds be- low the type of crystal structure is similar. Consider the strength of the attractive force bonding the ions together in each compound. In which case would the relative strengths be ranked correctly? aladross (kha255) – Unit 6 – knight – (D2) 6 1. MgCl2 LiBr 3. KF LiI

## what’s the mass percent and molarity of acetic acid in heinz

what’s the mass percent and molarity of acetic acid in heinz vinegar?

## Draw the molecular orbital diagram for CO. Based on your diagram,

Get college assignment help at uniessay writers Draw the molecular orbital diagram for CO. Based on your diagram, why does CO always bond through the carbon and not the oxygen atom?

## Construct the MO diagram for planar BH3 and for pyramidal BH3.

Construct the MO diagram for planar BH3 and for pyramidal BH3. Based on your MO diagram , why is BH3 planar?

## Make educated guesses at the pictures for the LGO’s for tetrahedral

Make educated guesses at the pictures for the LGO’s for tetrahedral and octahedral. Propose the appropiate pictures for the LGO’s symmetry labels for the square pyramidal Cr(CO)5. With your pictures, can you justify the energy levels for the bonding orbitals in your MO?

## how many grams of NH4NO3 are needed to produce 10.0L of

how many grams of NH4NO3 are needed to produce 10.0L of oxygen

## Calculate grams of solute 5.5 L of a 0.10 M CaCl2

Calculate grams of solute 5.5 L of a 0.10 M CaCl2 solution

## why pcl5 is trigonal bipyramidal in vapour phase

why pcl5 is trigonal bipyramidal in vapour phase

## the melting point of 82 degree celcius to 85 degree celcius

the melting point of 82 degree celcius to 85 degree celcius substance pure or impure?

## Lab Question!! A couple of drops of water were accidentally placed

Lab Question!! A couple of drops of water were accidentally placed on the properly folded filter paper before its mass was measured. However, in part A.6 the CaC2O4 precipitate and the filter paper were dry. How does this sloppy technique affect the reported mass of the limiting reactant in the original salt mixture?

## the drying oven although thought and assumed to be set at

the drying oven although thought and assumed to be set at 125 degrees celsius had an inside temp of 84 degrees celsius. how will this error affet the report percent by mass of the limiting reactant in the salt mixture…too high, too low, or unaffected? Explain

## if the steps for digesting the precipitate were omitted, what would

if the steps for digesting the precipitate were omitted, what would be the probable consequence of reporting the “percent limiting reactant” in the salt mixture? explain

## Dr. Alfred Hassner (when at the University of Colorado) found iodine

Dr. Alfred Hassner (when at the University of Colorado) found iodine azide (IN3), to add to terminal alkenes with complete anti stereoselectivity to the 2-butenes. a. Draw the line and wedge structures of the products obtained on addition of iodine azide to both cis and trans-2-butenes. Assign ‘R’ or ‘S’ to the asymmetric centers in your product. (2 Points) b. Propose a plausible mechanism (using curved arrow notation) for the addition of iodine azide to alkenes. (2 Points)

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