Why it is advised to use umbrella when you go out in sun

When a 1.00 L sample of water from the surface of the Dead Sea (which is more than 400 meters below sea level and much saltier than ordinary seawater) is evaporated, 151 grams of MgCl2 are recovered.

O que é umidade absoluta?

Which equation best represents the process of photosynthesis? A. 6CO2+12H2O-> light+C6H12O6+6O2+6H2O B. 6CO2+12H2O+light->C6H12O6+6O2+6H2O C. C6H12O6+6O2+6H2O+light->6CO2+12H2O D. C6H12O6+6O2+6H2O->light+6CO2+12H2O

Separation can be achieved when a reaction occurs in a mixture. the resulting mixture will have one chemical species in a solution and the other chemical species as a solid.

Which effect can have positive effects on the environment A. flood B. wildfire C. mudslide D. landslide

How many carbon atoms will be in the longest chain of 3,3,4,4-tetramethylhexane? How many sub-chains will there be in 3,3,4,4-tetramethylhexane?

What conditions make for a weak volcanic eruption?

Recording station x has determined that the epicenter of a recent earthquake was 250 km away. no information is available yet from any other recording stations. what can you conclude about the location of the epicenter?

A crane lifts a cargo box 10 m off the ground. If the crane lifts the cargo box twice as high, the potential energy will increase by

Consider the reaction cacn2 + 3 h2o → caco3 + 2 nh3. how much nh3 is produced if 187 g of caco3 are produced? 1. 2.13 mol 2. 63.6 mol 3. 3.74 mol 4. 36.1 mol 5. 1.06 mol 6. 72.3 mol