What is the minimum number of kilojoules needed to change 40.0 grams of water at 100 degree celsius to steam at the same temperature and pressure?

A doctor orders 4.5 mL of phenobarbital elixir. If the phenobarbital elixir is available as 20. mg per 7.5 mL, how many milligrams is given to the patient?

Neither dry soil nor pure water conducts electricity. But wet soil will conduct electricity. Explain why this happens?

Calculate the mass of water produced when 42.0 g of propane, c3h8, is burned with 115 g of oxygen. hint: write balanced equation first

Which conversion factor correctly shows the relationship between moles and representative particles? 1 mole/6.02 x 10-23 representative particles 6.02 x 1023 representative particles/1 mole 1 mole/6.02 x 10 representative particles 6.

Which statement about 2‑methyl‑1‑propanol, (CH3) 2CHCH2OH, and 1,3‑propanediol, HOCH2CH2CH2OH is true? 2‑Methyl‑1‑propanol is more soluble in water than 1,3‑propanediol because 2‑methyl‑1‑propanol has a smaller molecular mass.

Which statements are true about the linear inequality y > x - 2? Check all that apply

How is the Gobi Desert different from the Sahara Desert

Which average wind speed do areas need to effectively power wind farms? A:1 mph B:5 mph C:10 mph D:16 mph

What is the total number of moles represented by 20 grams of CACO3 A. 0.1 B. 0.2 C. 1 D. 2

Which describes the polarity in a water molecule? a). partial negative charge on the oxygen atom because its electrons are pulled toward the hydrogen atoms b).