In the following reaction: 4 Al + 3 O2 - > 2 Al2O3 How many moles of aluminum would be needed to completely react with 90 grams of O2?

A formula that shows how many atoms of each element a substance contains is called a (n) _ O A. ionic formula O B. molecular formula O C. structural formula O D. empirical formula

Select one metal which will displace Sn from a compound and form metallic tin (Sn). Cu, Cr, Hg, Ag

A solid keeps its shape due to which of the following factors? Space between particles Attractive forces between particles The type of element in the solid The container it is placed in

How many hydrogen atoms are in representative particle of each substance? Al (OH) 3

For a particular first-order reaction, it takes 3.0 minutes for the concentration of the reactant to decrease to 25% of its initial value. what is the value for rate constant (in s-1) for the reaction?

What type of chemical process is used to create perfume?

Which of the following is a polyatomic ion? O A. HCI O B. Na O C. PO, O D. 52

What are the cations and anions for V2 (CO3) 3

If you were asked to convert 4.2 x 1022 atoms of aluminum to moles, which of the following should you use for the conversion?

Carbonic acid (H2CO3) does not dissortate 100 percent in water. What type of substance is it? weak acid Strong base strong acid weak base