Chem Fall Final!

numbers

100

How many sig figs are in 0.000002?

What is 1 

200

What is scientific notation of 0.000002?

What is 2x10^-6

300

What is 30.6 x 4.056? Give your answer in scientific notation with sig figs.

What is 1.5 x 10²

400

What are the correct sig figs for the answer to this equation (2.290 x 10⁶) ÷ (6.7 x 10⁴) ?

What is two, 1.5 x 10¹¹

500

Convert 14.28 cm + 7.5 cm into m.

What is 0.2 m.

periodic table

100

What is the molar mass of Kr?

What is 83.798

200

How many neutrons are found in Se (estimated)?

What is 45 neutrons

300

how many valence elcetrons are found in group 1A?

What is 1

400

How many valence electrons are found in group 16?

What is 6

500

How do you calculate percent contribution of C¹², C¹³, and C¹⁴ to the molar mass of C?

What is C¹² mass (frequency) + C¹³ mass (frequency) + C¹⁴ mass (frequency)

bonds

100

Covalent bonds involve bonds with metals- true or false?

What is false

200

Ionic type one bonds involve which metals?

What is group 1, 2, Ag, Cd, Zn, Al

300

Please write the name of this compound and indicate when type of bond it uses: C₂S₄

What is dicarbon tetrasulfide, covalent

400

Please write the formula for this compound and the type of bond it uses: Hf₃P₂

What is Hafnium(II)phosphide, ionic type 2

500

Please write the name of this compound and the bond it uses: Sr₂F₄

What is Strotium fluoride, ionic type 1

moles

100

How many molecules are in 2 moles of CaCO₃?

What is 1.204x10²⁴ molecules

200

How many liters are in 4.3 moles of O₂ at STP?

What is 96.32 L of O₂

300

What is the molar mass of high performance gasoline (C₁₂H₂₆)?

What is 170 g

400

How many moles of C₁₂H₂₆ are found in 2.24 x 10¹⁰ g of gasoline?

What is 1.32 x 10⁸ moles of gasoline

500

If you have 3400 L of Ar at STP to warm your dry suit during a long dive, how many particle of Ar is that?

What is 9.14 x 10²⁵ particles of Ar.

chem equations

100

Write the unbalanced equation for reaction between gaseous oxygen and gaseous hydrogen to form water (liquid).

What is H_{2 (g)} + O_{2 (g)} -> H₂O _(l)

200

Balance this equation :___ H₃PO₄  +  ___ KOH ->  ___ K₃PO₄  +  ___ H₂O .

What kind of chemical reaction is this?

What is H₃PO₄  +  3 KOH -> K₃PO₄  + 3 H₂O  and double replacement

300

What type of reaction ends with products CO₂ and H₂O?

What is combustion

400

Balance this equation and tell what type of reaction it is:

__ CH₃CH₂CH₂CH₃  +   __ O₂ -> __ CO₂  +  __ H₂O

What is 2 CH₃CH₂CH₂CH₃  +   13 O₂ -> 8 CO₂  +  10 H₂O

combustion

500

Balance this equation and give the reaction:

___ Rb  +   ___ S₈  -> ___ Rb₂S  

What is 16 Rb  + S₈ -> 8 Rb₂S  and synthesis