Which of the following describes a pattern?

A. A record snowfall in January of one year

B. A solar eclipse that happens every 18 months

C. A tornado that is worse than any before it

D. The average height of a Sequoia tree

Draw the structures of the starting materials used to synthesize 3-methylbutyl propanoate. (draw the structures in the single sketchpad shown. draw only the structures - do not include a plus sign.)

An element has an atomic number of 29. The number of protons and electrons in a neutral atom of the element are * A. 58 protons and 29 electrons B. 29 protons and 0 electrons C. 15 protons and 14 electrons D. 29 protons and 29 electrons

2. Make and justify a claim about whether iron rusting when exposed to water vapor is a physical or chemical property. 3. Make and justify a claim about whether iron being shiny/lustrous a physical or chemical property.

Who discovered chlorine

A glass breaks is a physical or chemical change

The balanced equation for the generation of sugar from sunlight water and co2 is

Isotopes of the same element have different ... A. Positions on the periodic table b. atomic numbers C. Mass number

How many moles of O2 are needed to make 1.98 moles of SO3

How many protons are in the nucleus of isotopes L?

What is the empirical formula for a compound that contains 38.77% Cl and 61.23% O?