Chemistry, 14.12.2020 19:30 mathiscool7
Malik places a helium-filled balloon in a sunny window. He wonders how the motion of hellum gas molecules in
the balloon would be affected by the addition of thermal energy from the Sun. Which graph BEST represents the
effect of adding thermal energy on the motion of the helium gas molecules?
Answers: 1
Chemistry, 22.06.2019 03:40
Astudent is given a sample of a blue copper sulfate hydrate. he weighs the sample in a dry covered porcelain crucible and got a mass of 23.875 g for the crucible, lid, and sample. the mass of the empty crucible and lid was found earlier to be 22.652 g. he then heats the crucible to expel the water of hydration, keeping the crucible at red heat for 10 minutes with the lid slightly ajar. on colling, he finds the mass of crucible, lid, and contents to be 23.403 g. the sample was changed in the process to very light clue anhydrous cuso4. if there are again 100.0 g of hydrate, how many grams of cuso4 are in it? how many moles of cuso4? (hint: molar mass of cuso4 = 159.6 g / mole. what per cent of the hydrate is cuso4? you may convert the mass of cuso4 to moles.)
Answers: 3
Chemistry, 22.06.2019 11:20
Which of the following contributes to the structural rigidity of cellulose? adjacent glucose polymers are stabilized by hydrogen bonding. glucose residues are joined by (α1→4) linkages. cellulose is a highly branched molecule. the conformation of the glucose polymer is a coiled structure.
Answers: 2
Chemistry, 23.06.2019 01:00
What is the chemical name of the compound ti2o3? use the list of polyatomic ions and the periodic table to you answer.
Answers: 1
Chemistry, 23.06.2019 02:30
Which statement best describes the liquid state of matter? a. it has definite shape but indefinite volume. b. it has definite shape and definite volume. c. it has indefinite shape and indefinite volume. d. it has indefinite shape but definite volume.
Answers: 1
Malik places a helium-filled balloon in a sunny window. He wonders how the motion of hellum gas mole...
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