Which of the following could be classified as matter? Check all of the boxes that apply. desk water idea cloud helium dream

4Al + 3O2 = 2Al2O3 In this chemical reaction, how many grams of Al2O3 will be produced if 375 grams of Al react completely?

What does the term inert refer to?

When two monosaccharides undergo a dehydration synthesis reaction in which type of molecule is formed?

Element A has one valence electron. How does its reactivity compare to that of element B, which has four valence electrons? A) Element A is more reactive. B) Element A is less reactive. C) Element A and B have the same reactivity.

What is the pH when the hydrogen ion concentration is 7.0 * 10^-3 M? A. 1.9 B. 2.2 C. 3 D. 3.3

Which explanation best describes a wave? A. a disturbance that travels through a medium with a transfer of energy and matter B. a disturbance that travels through a medium without a transfer of energy and matter C.

The requirements for one type of atom to substitute for another in a solid solution are:

How could you separate items that are different densities? explain

Why do elements within a period of the periodic table have different properties

A professional technician maintains and operates specialized scientific equipment. True False