How many moles are in 87.62 grams of strontium?

As scientists opinion is a valid source of information to use in a scientific investigation is this statement true or false? And why

Which answer choice best explains why atoms of carbon-14 (C-14) are unstable? Atoms of C-14 have too many negatively charged electrons and too few positively charged protons.

Before dinner, Mr. Larsen pushes his daughter Sally on her swing for a few minutes. The chain creaks and rubs against the metal hook at the top of the bar as she swings through the air. After he stops pushing her, she slows down and eventually stops.

How is the modern atomic model different from Bohr's model

Suggest two reasons why copper from these area of land is not extracted by smelting

Isopropyl alcohol (C3H8O) is a common solvent used for cleaning and disinfectant purposes. Its mass spectrum is shown below.

How is an unsaturated fat converted to into a saturated fat?

Is hydrofluoric acid stronger than acetic acid?

How much energy does an electric hair dryer use if it draws 8.3 amps of current when using 120 volts for 5.0 minutes?

You need a 45% alcohol solution. on hand, you have a 480 ml of a 40% alcohol mixture. you also have 85% alcohol mixture. how much of the 85% mixture will you need to add to obtain the desired solution?