A student placed 3 grams of one reactant in a beaker and added 4 grams of another reactant A chemical reaction took place in the uncovered beaker When the student weighed the beaker after the reaction, she found the contents of the beaker weighed 5 grams Which of the following is the best possible explanation for her results?

The pressure inside a hydrogen-filled container was 2.10 atm at 21 ? c. what would the pressure be if the container was heated to 92 ? c ?

Pls! plant cells and animal cells were observed under a microscope. the characteristics of two cells are listed below. cell p: does not capture sunlight cell q: has cytoplasm but no chloroplast which statement about the two cells is correct? cell q also has a cell wall. cell q also has large vacuole. cell p also has a large vacuole. cell p also has a cell membrane.

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.