A Helium Balloon contains 24.3 moles of Helium Gas. How many grams of Helium is this?

0.165 g

6.01 g

97.2 g

1.46 x 10^25 g

Murphy built a simple motor with a battery, permanent magnet, copper coil of wire and iron bar. When the motor is turned on, the iron bar and coil spin in a circle to produce electricity, explain the energy Transformations occurring in the motor

The relative molecular mass of sodium hydroxide is 40. if 60 grams of sodium hydroxide are dissolved in water how many moles will there be in the solution?

What volume of water would be added to 16.5 ml of a 0.0813 m solution of sodium borate in order to get a 0.0200 m s?

What is the chemical formula for helium gas?

The nucleus of an atom contains positively charged particles, called protons, and neutral particles, called neutrons. how is the nucleus of an atom held together?

Monel metal is a corrosion-resistant copper-nickel alloy used in the electronics industry. A particular alloy with a density of 8.80 g/cm3 and containing 0.073% Si by mass is used to make a rectangular plate that is 15.0 cm long, 12.5 cm wide, and 2.

Manual pipetting creates musculoskeletal load on the neck shoulders and upper limbs what type of injury can this lead to a fracture stress injuries b repetitive stress injuries c vibration stress injuries d compression stress injuries

What happens in cellular respiration?

An increase in the average kinetic energy of a sample of copper atomsoccurs with an increase in (1) concentration (3) pressure (2) temperature (4) volume

Eyes Spinal Cord Brain All of these are part of which organ system?