How do you solve (2x+1) + (x-10) = 90

What volume measured in stp will 3.75 grams of helium gas occupy?

It takes 52.0 j to raise the temperature of an 11.7 g piece of unknown metal from 13.0∘c to 25.0 ∘c. what is the specific heat for the metal?

A chemical reaction is done in the setup shown, resulting in a change of mass. What will happen if the same reaction is done in a sealed container that is placed on the electronic balance?

Which substance is most likely to heat up the fastest?

A company in San Francisco uses petroleum products to make plastics. Arrange the sentences in the correct order to show how the company could be contributing to climate change. Burning fuel releases greenhouse gases.

What is the most abundant substance dissolved in sea water? magnesium chloride sodium chloride

Problem 5.32 - enhanced - with feedback the rolling resistance for steel on steel is quite low; the coefficient of rolling friction is typically μr=0.002. suppose a 180,000 kg locomotive is rolling at 22 m/s on level rails.

Gina made a poster for plastic recycling week and included this information on her poster: What corrections should Gina make? Check all that apply. Gina should put "cellulose" under "Synthetic." Gina should put "plastic" under "Natural.

How is DNA linked to a person's inheritance?

Green plants take in water (H2O) and carbon dioxide (CO2) and produce glucose (C6H12O6) and oxygen gas (O2). Calculate the molar masses of carbon dioxide, glucose, and oxygen gas.