Perform the following calculations. Express the answers with the correct number of significant figures.

a) 7 g - 3.5 g - 2.75 g =

b) 200.00 kg - 199.0 kg =

c) 25 L - 3.0 L =

d) 0.67 cm + 2.0 cm + 0.090 cm =

e) 104.5 g + 0.40 g =

Why are fresh fruits and vegetables sprinkled with water at produce markets?

Calculate the pH of each of following buffered solutions.? a. 0.10 M acetic acid/0.25 M sodium acetate b. 0.25 M acetic acid/0.10 M sodium acetate c. 0.080 M acetic acid/0.20 M sodium acetate d. 0.20 M acetic acid/0.080 M sodium acetate

Which of the following compounds does NOT contain molecules? Question 2 options: CO2 H2 NaCl H2O

If an element has an atomic number of 11 and a mass number of 23, how many protons, neutrons, and electrons does it have

If the first half-life of a zero-order reaction is 200s, what will be the duration of the next half-life?

Are the following statements true or false? A. Two pi bonds comprise a double bond. B. Bonds formed from atomic p orbitals are always sigma bonds. C. Side-to-side overlap results in a bond with electron density above and below the bond axis. D.

Does beryllium or sodium have the same inside electron arrangement as magnesium

How do carbohydrates relate to organic chemistry

Periodic table, chemistry questions who discovered lanthanides. how did they discover it, when did they discover it.

A flask containing 155cm^3 of hydrogen was collected under a pressure of 22.5kPa. What pressure would have been required in order for the volume of the gas to have been 90.0 cm^3 at constant temperature?