Which is a physical change?

A)

burning wood

Eliminate

B)

rusting metal

C)

cooking an egg

D)

freezing water

What did Dimitri meandered discover

The prefix 'kilo-' means a thousand. So a kilo-gram is a thousand grams. 1 kilogram = 1,000 grams. How many kilograms is 831 grams? Round your answer to the nearest tenth of a kilogram.

How many milliliters of 0.111 m hclo4 solution are needed to neutralize 50.00 ml of 0.0789 m naoh?

Four moles of hydrogen iodide (hi) gas react with one mole of oxygen (o2) gas to produce two moles of iodine gas (i2) and two moles of water gas (h2o).

During respiration, plant cells release: water oxygen sugar carbon dioxide

2. What type of bond holds together nitrogen atoms? a. Single Bond b. Double Bond c. Triple Bond d. no bonds hold nitrogen together

Which acid-base pair will always undergo a reaction that produces a neutral solution? answer?

A chemical reaction is carried out in a closed container. The energy absorbed by the chemical reaction is 50 kJ. What is the energy liberated from the air or the walls of the container? A) 50 kJ B) 75 kJ C) 25 kJ D) 100 kJ

Draw the electron-dot structure for chclo. draw the molecule by placing the atoms on the grid and connecting them with bonds. include all lone pairs of electrons.

At stp 5.6 liters of ch4 which element contains the same number of molecules?