5. How many significant figures are in the measurement + 0.500 mg?

two

three

four

five

What happen when iron reacts with copper sulphate

What is the formula of the compound that contains iron (ii) (fe2+) and sulfate (so42-) ions?

Greenhouse effect how do greenhouse gases affect global temperatures

Which of the following is an example of a velocity? 284 cm/sec southwest 65 miles per hour 24.5 m/sec2 15 miles in 2 hours

Atoms can be broken down through what processes? A.) chemical but not nuclear B.) only biological C.) both chemical and nuclear D.) nuclear processes but not chemical

Suppose that 0.95 g of water condenses on a 75.0 g block of iron that is initially at 22 °c. if the heat released during condensation is used only to warm the iron block, what is the final temperature (in °c) of the iron block?

How many grams of NaOH are produced with the reaction of 5.00 moles of water?

Describe the physical properties of water

Which element has the same number of valence electrons as oxygen--. a. Neon-b. Nitrogen-c. Sulfur-d. Fluorine

Approximately how many half-lives must pass for the amount of radioactivity in a substance to decrease to below 1% of its initial level?