The Math of Chemistry (A to Z)

What is 50^o C in Kelvin?

• 223 K
• 323 K
• 273 K
• -50 K

Reduce the following compound to its empirical formula: C₆H₁₂O_6.

• C₃H₆O₃
• C₃H₃O₃
• C₁H₂O₁
• C₁H₃O₁

Tags

NGSS.HS-PS1-7

Alice buys three 2 liters of soda at the store. How many moles did she buy?

• 0.3 mol
• 0.27 mol
• 6 mol
• 0.09 mol

Upon discovering that a box contains 7.0 liters of H₂ gas, a scientist wants to know how many molecules of H₂ gas there are.

• 1.9 x 10²³ mlcl
• 0.31 mlcl
• 1.9 mlcl
• 6.04 x 10²³ mlcl

Zeke inhaled about 5 grams of Oxygen Gas. How many liters did Zeke inhale?

• 3.5 L
• 7 L
• 32 L
• 16 L

A 6kg block of gold is unearthed. Wow, right? How many moles of gold are there in this block?

• 30 moles of Au
• 1.2 moles of Au
• 6000 moles of Au
• 30 moles of Ag

What volume would 4 moles of gas X₂ occupy at 83 kPa if the temperature is 27^oCelsius?

• 10L of gas X₂
• 1L of gas X₂
• 0.1L of gas X₂
• 100L of gas X₂

30 grams of NaCl is dissolved in 0.5 Liters of H₂O. What is the molarity of this solution?

• 1 M NaCl
• 1.03M NaCl
• 60M NaCl
• 15M NaCl

Which of these is NOT equal to one mole?

• 22.4L
• Avogadro's number
• Molar Mass from PT
• 1 molecule of any compound

If 15 Joules are used to heat 13 grams of a substance and the substance increases in temperature from 30^oC to 40^oC what is the specific heat?

• 0.12 J/gC
• 20 J/gC
• 0.87 J/gC
• 2000 J/gC

Tags

NGSS.HS-PS3-4