Which is an example of an endothermic reaction?

combustion of fuels

burning of wood

cellular respiration

photosynthesis

nuclear explosion

What happens when the threat of exposure to dirty air is reduced in a community? There is enough oxygen available for people's lungs to function normally The amount of indoor air pollutants released during a fossil fuel burn decreases There is a

Why don't these gases tend to form chemical bonds? A. They have 8 electrons in their outer shell and don't need more to be stable. B. They don't have any electrons Need an answer. No Guessing.

Write the formula for calcium chloride

Which atom has the largest atomic radius? K Br Ca Kr

A positively charged subatomic particle

What is the mass of 5.40*1021 platinum atoms?

A 2.00 L sample of gas at 35 C is to be heated at constant pressure until it reaches a volume of 5.25 L. To what Kelvin temperature must this sample be heated?

As you climb through the troposphere, the temperature: increases decreases is constants

One benefit of nuclear fission reactions is 1. nuclear reactor meltdowns 2. storage of waste materials 3. biological exposure 4. production of energy

How many atoms are there in one molecule of hexane? (a) six (b) ten (c) twelve (d) twenty