I like this guy but i don't think he likes me back. he also goes to school somewhere else, but we see eachother every friday. he doesn't talk to me he just looks at me and looks away. what do i do ...

Ben and Jerry added small pieces of magnesium to hydrochloride acid. They noticed that bubbles formed, the test tube got hot, and the the magnesium disappeared. What is a sign that a chemical reaction has taken place in this experiment

Flooding on rivers is caused by human activity rather than natural events.

Which of the following buffers will be most effective at pH 9.25? Group of answer choices a mixture of 1.0 M HC2H3O2 and 1.0 M NaC2H3O2 (Ka for acetic acid = 1.8 x 10-5) a mixture of 1.0 M NaCN and 1.0 M KCN (Ka for HCN = 4.9 x 10-10) a mixture of 1.

In terms of shape and volume, how can a gas be defined?

an element p has atomic number 13 while q has the atomic 16 ... write down electric configuration of p and q

Which of these substances is a pure substance? 1. hydrogen gas 2. the liquid called tea 3. Coca cola

Activation energy is defined as

Benzene and its derivatives undergo a type of substitution reaction in which a hydrogen atom is replaced by a substituent, but the stable aromatic benzene ring is regenerated at the end of the mechanism.

Graph the lines y = 3x, y = 3x - 3, and y = 3x + 3. What do you notice about the lines? Make a conjecture based on your observation. It says chemistry but it's really math.

Which of the following causes slow environmental changes? (a) tsunami (b) landslides (c) weathering and erosion (d) forest fire