True or false? All four types of macromolecules always contain carbon (c), hydrogen (h), and oxygen (o), but not all of them contain nitrogen (n).

3. What is the volume of a salt crystal measuring 2.44 x 10-2 m by 1.4 x 10-3 m by 8.4 x 10-3 m? 2.9 x 10-5 m3 2.9 x 10-7 m3 2.9 x 10-5 m3 2.9 x 10-9 m3

What can happen when earth materials overcome the force of friction holding them together? A) wildfire B) a landslide C) a flood D) erosion

Lactase and carbonic anhydrase are examples of what type of substance? substrate reactant product enzyme

Mrs. Jones is pushing her daughter in a stroller. If the stroller has a mass of 5 kg and it is accelerating at 2 m/s2, what amount of force is Mrs. Jones applying to the stroller? N (free response)

Which notation represents an atom of sodium with an atomic number of 11 and a mass number of 24

1. 1.204 x 1024 atoms He = ? moles He

How many atoms are in 35.1 g of sodium chloride (NaCl) ?

Write the complete balanced equation for the reaction that occurs when C3 H8 combusts in O2.

Which one of the following is not a homogeneous mixture? Question 18 options: vegetable soup carbonated beverages saline solution brewed tea

Choose the substance with the lowest surface tension. Choose the substance with the lowest surface tension. a) H2O b) (CH3) 2CO c) CH3CH2CH2CH3 d) C6H6 e) CH3OH