Scientists use their to make observations

Dont understand the answer in simple terms. Suppose a bag of ice (450g) at 0.0°C sat on a counter and began to melt to liquid water. How much energy must be absorbed by the ice if 2/3 of it melted

12.0 L of gas in a piston at a pressure of 2.00 atm are compressed until the volume is 7.00 L. What is the new pressure inside the piston?

Compound j is optically active and has the molecular formula c6h10 and has a four carbon ring. on catalytic hydrogenation, j is converted to k (c6h12) and k is optically inactive. propose structures for j and k.

Which of the following is needed to calculate the density of a substance? A. Weight and Volume B. Weight and Speed C. Speed and Mass D. Mass and Volume

What forces can be classified as intramolecular

Ice does not need to melt into liquid water before it can return to the atmosphere as water vapor. a. True b. False

How much ice at a temperature of - 17.5 ∘C must be dropped into the water so that the final temperature of the system will be 31.0 ∘C?

Why does a gas fill completely the vessel in which it is kept?

Individuals who work full time and those who work part-time enjoy basically the same number of paid leave benefits. True False

There is a large increase in ionization energy between the second and the third ionization energies of a metal. What kind of ion is the metal likely to form? Include the charge in your answer.