The number of protons plus neutrons in the atom is called its?

Part a a sample of gasoline contains various hydrocarbons, which comprise atoms of carbon, hydrogen, and oxygen. the hydrocarbons mix together uniformly to form gasoline. which term or terms could be used to describe this sample of gasoline?

Which statements best describes a major difference types of elements

Name three ways chemists keep track of amounts of substances

Children's chewable tylenol contains 80 mg of acetaminophen per tablet. if the recommended dosage is 10 mg/kg, how many tablets are needed for a 53-lb child?

Ammonia that is used in the home has a pH of 11.9. What type of solution is ammonia?

How many moles of liquid water must freeze to remove 100 kJ of heat? (ΔHf = - 334 J/ g.

What is the power of a kitchen blender if it can perform 3750 joules of work in 15 seconds?

A 75.00 g a sample of a substance is analyzed and found to consist of 32.73 g phosphorus and 42.7 g oxygen. calculate the percent composition of this substance.

Which one of the following melts the fastest: rectangular prism, cylinder, and rectangular trapezoidal trough?

A 1.8-mL volume of seawater contains about 4.0 * 10^-10 g of gold. The total volume of ocean water is about 1.5 * 10^21 L. Calculate the total worth of all the gold in the world's oceans if the price of gold is $19.