List 2 physical properties that can be used to differentiate between a Cu (before 1982) penny and a Zn (after 1982) penny.

Covalent Bonding Answer the questions below. 1 Chlorine atoms have 17 electrons. Their electronic structure is 2,8,7 as shown in Figure 1.

In a reaction, 25 grams of reactant AB breaks down into 10 grams of product A and an unknown amount of product B. Using the law of conservation of mass, how much does product B weigh? a. 25 g B. 10 g С.

A scientist finds an unusual object and decides to study it. Which observation indicates that the object is a living thing? A.) It has an uneven shape. B.) It is made of cells. C.) It has a hard outer shell. D.) It is found in water.

What is the third ionization energy of titanium?

Over-the-counter hydrogen peroxide solutions are 3% (w/v). What is this concentration in moles per liter?

what is the density of a substance that has a mass of 2.0 g, and when placed in a graduated cylinder the volume rose from 70 mL to 75 mL

A block of lead has dimensions of 4.50cm by 5.20cm by 6.00 cm. The block weighs 1587 g. From this information, calculate the density of lead.

Which states of matter have no definite volume?

Which weighs more 10g of iron or 10g of water

Which pair of elements would combine to form an ionic compound? а b sodium and calcium sodium and chlorine carbon and oxygen carbon and sulfur с d