Why must astronauts use microphones and headphones in outer space

Using the mass of the proton 1.0073 amu and assuming its diameter is 1.0*10-15m, calculate the density of a proton in g/cm3.

How many liters are in 23 moles of oxygen gas (O2)

Which statement is not a reason why water is important to the cell

48 When an atom of the unstable isotope Na-24 decays, it becomes an atom of Mg-24 because the Na-24 atom spontaneously releases (1) an alpha particle (3) a neutron (2) a beta particle (4) a positron

Jack wants to know if it takes longer for warm water to freeze into ice cubes than cold water, so he performed the following experiment. Jack placed 50 mL of water in the refrigerator and allowed it to cool to a temperature of 4°C.

3. Ordered: 30 mg Furosemide Available: 40 mg/2ml. How many milliliters will be given? Ordered: Acetaminophen 250 mg Available: 500 mg tablets. How many tablets will be given? Ordered: 300 mg Rocephin Available: 500 mg / 10 ml.

A metal having a mass of 44 grams is dropped in 118.2 cm3 of water and sinks to the bottom. The volume of the water and object is 124.3 cm3 . What is the density of the metal?

Calculate the {H+}, {OH-}, oh, pOH, and % dissociation of a 1.0x10^-3 M solution of HCl

What is the mass of potassium chloride when 6.75 g of potassium reacts with an excess of chlorine gas? the balanced chemical equation is:?

Which property of gases is explained by the process of diffusion?