How many atoms of He are in 5.69 grams?

O

3.70 x 10 23

O

3.7x10 23

O

8.57 x 10 23

O

8,6 X 10 23

Which of the following reactions occurs most rapidly at room temperature? a. 2AgNO3 (aq) + Na2CrO4 (aq) → Ag2CrO4 (s) + 2NaNO3 (aq) b. CaO (s) + 3C (s) → CaC2 (s) + CO (g) c. SnO2 (s) + 2CO (g) → Sn (s) + 2CO2 (g) d. 2Fe (s) + O2 (g) → 2FeO (s)

How much genetic information would a brother and sister have in common?

A block of aluminum occupies a volume of 15.0 mL abd weighs 40.5 g. What is its density?

What organisms are most of the life forms you can see

What is the interaction between two or more of the same or different atoms biology that results in the formation of molecules? chemical bond adhesion cohesion electronegativity

Tina has a sample of gaseous water at a temperature of 400 C and a pressure of 4 atm. If Tina increases the pressure to 200 atm, will the gaseous water liquefy? Why or why not?

Label the molecular shape around each of the central atoms in the amino acid glycine. hint

Which has more atoms, 2moles of carbon or 2 moles of aluminum

At 100 degrees c, water reacts with acetic anhydride to make acetic acid. also, at 100 degrees c, water reacts with acetylsalicylic acid and reverts it to salicylic acid and acetic acid.

What is the valence electron configuration of the group 2a elements?