How many atoms of hydrogen are there in 3.0kg of ethane

A candle is placed on one pan of a balance, and an equal weight is placed on the other pan. what would happen if you lit up the candle and waited for a while?

The ability or power to transmit heat, electricity, or sound (hint: 12 letter)

The element phosporus is located to the right of the element magnesium along the same period in the periodic table. Which best describes the relationship of the elements? Magnesium has a larger atomic number. Phosphorus has a larger atomic mass.

On 4. Which of the following is true about the Sun? OA. The Sun is the only star in the Universe. OB. The Sun is one of many stars in the Solar System. OC. The Sun is one of many stars in the Milky Way Galaxy. OD.

A salt is best described as a compound that is formed from the reaction between an acid and a base. a strong acid and a wea acid. a strong base and a weak base. an acid and water.

How many milliliters of concentrate sulfuric acid, which is 96% (w/w) pure H2SO4, are needed to prepare 500.0 mL of a 2.0 M solution of sulfuric acid?

A state function represent?

Write the chemical equation for this process: ""Copper metal is placed in a solution of silver nitrate. This produces silver metal and copper nitrate solution.""

A set of four 15.0-mL solutions-each in a similar open dish-was left at room temperature, and the amount that remained was recorded after every hour. Which of the solutions do you expect to be the first to completely evaporate from the open dish?

A silver coin rubs vigorously against a wool cloth. becomes positively charged. Which statements are true? The silver coin lost electrons. The silver coin gained electrons. The wool cloth lost electrons. The wool cloth gained protons.