Chemistry, 21.04.2021 22:40 williams5847
Calculate the energy change when 25.0 g of magnesium changes from 27°C to 45°C. The specific heat of magnesium is 1.05 J/g*°C.
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You have a calorimeter set up with 40 mL (40 g) of water. You perform a chemical reaction and notice the temperature change of the water is 15°C. What is the energy change of the chemical reaction? (cwater= 4.18 J/g*°C)
J
You have set up a calorimeter using 50 mL (50 g) of water. When performing a chemical reaction with the calorimeter, you notice the temperature of the water changes from 25.0°C to 50.0°C. What is the energy released by the chemical reaction? (cwater=4.18 J/g*°C
J
A calorimeter is set up with 30 g of water. You ignite a food item and as it burns causes the water to increase from 27°C to 39°C. What is the calorie value of the food item? (cwater= 1.00 cal/g*°C
J
Answers: 1
Chemistry, 22.06.2019 11:20
Sodium nitrite (nano2) reacted with 2−iodooctane to give a mixture of two constitutionally isomeric compounds of molecular formula c8h17no2 in a combined yield of 88%. draw reasonable structures for these two isomers. click the "draw structure" button to launch the drawing utility. place the two compounds in the appropriate boxes below.
Answers: 1
Chemistry, 22.06.2019 13:30
In a ni-cd battery, a fully charged cell is composed of nickelic hydroxide. nickel is an element that has multiple oxidation states. assume the following proportions of the states: nickel charge proportions found 0 0.17 +2 0.3 +3 0.33 +4 0.5 (a) determine the mean of the nickel charge. enter the answer to 2 decimal places.(b) determine the cumulative distribution function of nickel charge.
Answers: 2
Chemistry, 22.06.2019 14:30
Select all that apply. using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 (s) pb+2(aq) + 2cl -(aq). the concentration of the products yield a ksp of 2.1 x 10-2:
Answers: 2
Calculate the energy change when 25.0 g of magnesium changes from 27°C to 45°C. The specific heat of...
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