HALP

Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemical equation: () BaO2 + () H2SO4 → () H2O2 + () BaSO4

Why plants have specialized organelles animals and bacteria do not. Do those organelles serve a special function not needed in the other organisms?

How does the electron-cloud model describe electrons? A. The exact position of an electron can be known. B. An electron can be found at certain distances from the nucleus. C. An electron has a high probability of being in certain regions. D.

True or false 1. The valence number of Sulphur in H2S is 1. 2. The symbol of potassium is derived from English name. 3. The apparatus used to carry out distillation process is filter pape 4.

Magnetism, reactivity, and fluorescence are three special properties used to identify minerals. true or false

A mixture with medium sized particles that do not settle out is called

Two compound samples are found to have the same mass percentages of the same elements. what can you conclude about the two samples

Sodium hypochlorite (Na xCl yO z) is the active ingredient in household bleach. A 250.0 g sample of sodium hypochlorite contains 77.2 g sodium, 119.1 g chlorine, and the remainder is oxygen. Calculate the empirical formula of sodium hypochlorite.

The tapeats sandstone in the grand canyon is an example of a clastic sedimentary rock. such clastic sedimentary rocks can be distinguished from biochemical sedimentary rocks by

An ice cube and a scoop of table salt are left outside on a warm, sunny day. Explain why the ice cube melts and the salt does not

Which atomic orbitals overlap to form the C-O bond of dimethyl ether, (CH3) 20? O c 2sp^3 + 2sp^3 OC 2sp^2 + 0 2p O c 2sp^2 + 0 25p^2 O C 2sp^3 + O 2sp?