When an object moves, stops moving, changes speed, or changes direction, how do scientists describe that condition?

a. a balanced set of forces

b. stable factors

c. frictional force

d. unbalanced forces

What type of bonding occurs in potassium oxide, k2o?

A scientist finds one carbon atom for every two oxygen atoms in a sample of compound x. for which other samples of compound x should this ratio hold true?

Describe two examples of heat conduction from your daily life

How many mL of a 4.50 (m/v) % solution would contain 23.0 g of solute?

What is the total number of electrons possible in the 6s orbital?

Describe the composition of a lead storage battery

A 5.0g sample of aluminum with a specific heat of 0.90 j/g was heated from 22.1^c to 32.1^c. How much heat to the nearest joule did the aluminum gain?

How many moles of HI are present at equilibrium when 2.0 moles of H2 is mixed with 1.0 moles of I2 in a 0.50 L container and allowed to react at 448oC. At this temperature K = 50.

A laboratory manual gave precise instructions for carrying out the reaction described by the chemical equation, C2H6O + O2 C2H4O2 + H2O.

2Al (s) + 3Pb (N03) 2 (aq) 2Al (N03) 3 (aq) + 3Pb (s) How many molecules of Pb (N03) 2 are used in the reaction? How many oxygen atoms are used in the reaction? How many moles of Al (N03) 3 are formed?