Chemistry, 13.01.2020 05:31, idontknow1993
Which of the following is true in regard to a charged atom?
a. the number of protons and the number of electrons within the same atom are unequal.
b. when an atom gains an electron, it becomes a cation, which is positively charged.
c. when an atom loses an electron, it becomes an anion, which is negatively charged.
d. the magnitude of the negative charge is equal to the magnitude of the positive charge.
Answers: 3
Chemistry, 22.06.2019 13:10, Jana1517
The last few miles of the marathon are the most difficult for heather, her hair plastered to her head, sweat clinging to her arms, and her legs already feeling as if they had nothing left, just dead weight. after grabbing a cup of ice water, she feels the ice cubes smash against her nose as she gulps some cool refreshment and keeps on running. in these last few miles, the breeze kicks up and she finally feels some coolness against her skin. drips of sweat, once clinging to her forehead, now spill down, and heather feels more pain as the sweat flows into her eyes. which of the following is the most likely reason why the ice struck heather’s nose when she took a drink? a) water can function as a solvent. b) water can store large amounts of heat. c) water can moderate temperatures through evaporative cooling. d) the density of water decreases when it freezes. e) water has a cohesive nature. sweat remained on heather’s forehead and arms because of the a) high salt content of sweat b) cohesive nature of water c) ability of water to moderate heat d) high evaporative cooling effect of water e) ability of water to act as a solvent
Answers: 1
Chemistry, 22.06.2019 13:50, amandamac7339
Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.
Answers: 1
Which of the following is true in regard to a charged atom?
a. the number of protons a...
a. the number of protons a...
Mathematics, 19.11.2020 08:00
Mathematics, 19.11.2020 08:00
Mathematics, 19.11.2020 08:00
Mathematics, 19.11.2020 08:00