Which situation describes evidence of a chemical change?
a. when food color is added to water, it changes color.
b. a solid changes into liquid when heated.
c. a solution feels warm after a cool solid is added to it.
d. a cloudy solution is clear after filtering.
Answers: 2
Chemistry, 22.06.2019 00:30
Which compounds have the empirical formula ch2o? a.c2h4o2 b.c3h6o3 c.ch2o2 d.c5h10o5 e.c6h12o6
Answers: 3
Chemistry, 22.06.2019 17:00
Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.
Answers: 2
Chemistry, 22.06.2019 17:10
Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth
Answers: 2
Which situation describes evidence of a chemical change?
a. when food color is added to water...
a. when food color is added to water...
Mathematics, 23.12.2020 17:10
English, 23.12.2020 17:10
Mathematics, 23.12.2020 17:10
Mathematics, 23.12.2020 17:10
Mathematics, 23.12.2020 17:10
Mathematics, 23.12.2020 17:10