What does it mean when your teacher wants you to round 143 to two significant figures

The process of isotopes breaking down and emitting particles, such as alpha or beta, to form a new substance.

A 50.00 g sample of an unknown metal is heated to 45.00°C. It is then placed in a coffee-cup calorimeter filled with water. The calorimeter and the water have a combined mass of 250.0 g and an overall specific heat of 1.035 cal/g•°C.

The hormones released due to stress lead to increased risk of pregnancy. T F

Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of Al (C2H3O2) 3 and LiNO3 are mixed.

The main difference between speed and velocity is that velocity includes this: units there is no difference magnitude direction

What type of solution is aerated water. why is it so.

What elements form chemical bonds

Which of the following is not a pseudoscientific claim

Which action by the British government was considered by American colonists to be a violation of their rights as Englishmen?

Calculate moles of oxygen atoms in 0.68mol of KMnO4