When humans burn fuel or cut down trees, they (increased or decrease) levels

A. If it increases

B. If it decreases

A participant took 5.2 hours to complete a marathon. How many minutes did the participant take to complete the marathon? Use 1 hour = 60 minutes 11.5 minutes 33.8 minutes 312 minutes 322 minutes

The general formula for the alkane series is:

Why are all of the substances on the periodic table classified as elements?

Calculate the number of atoms in a 4.08 * 103 g sample of cesium.

Sequence the first group of elements in order of increasing ionization energy

How many earth minutes are represented by 0.1 martian sol

Which of the following shows three elements in order of decreasing conductivity? A. Zn, Pd, Ag B. Pd, Ag, Zn C. Ag, Pd, Zn D. Zn, Ag, Pd Which of the following is the name of a metal? A. K B. Potassium chloride C. Potassium D. KCI

Which of the following describes nuclear fission? It requires extremely high temperatures to begin the reaction. It involves the combining of nuclei. It involves bonding electrons. Its chain reactions can be initiated by neutrons.

Which is a quantitative observation A. 15 m long B. red color C. rough texture D. strong odor

How many moles of Na are needed to produce moles of NaCl in the reaction below 2 Na + Cl2-->> 2 NaCl A. 2 moles B. 8 moles C. 1 mole D. 4 moles