Agroup of students measured the density, the state of matter at 25 degrees celsius, reactions with water, and reactions to a flame and recorded the data in the table below: based on the results, what can be determined about the substances? options: a. all substances experienced a chemical change. b. argon did not experience a chemical change. c. only sodium experienced a chemical change. d. only hydrogen gas and sodium experienced a chemical change

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next

When a nucleus absorbs a neutron and then breaks apart, there are many products of the reaction. what is not a product of a nuclear fission reaction

Word equation for k(s)+h2o(l) yield koh(aq) + h2(g)