Chemistry Chalk Lab

MOLES OF CHALK LAB

How many grams of chalk were used to draw the picture? chalk 12.1g before, 11.7g after.

• .4g

• .8g

• .3g

• .9g

Tags

NGSS.HS-PS1-7

MOLES OF CHALK LAB

What is the chemical formula of Calcium Carbonate?

• NaOH

• CaCO₃

• CaC

• CaOH

Tags

NGSS.HS-PS1-1

MOLES OF CHALK LAB

What is the molar mass for Calcium Carbonate (CHALK)?

• 58 g/mol

• 90 g/mol

• 100 g/mol

• 200 g/mol

MOLES OF CHALK LAB

Calculate the number of moles of chalk BEFORE drawing the picture. (chalk 12.1g before)

• .121 moles

• 2 moles

• .98 moles

• .234 moles

MOLES OF CHALK LAB

Calculate the number of moles of chalk used to draw the picture. 12.1g before drawing, 11.7 after drawing

• 2g

• 1g

• .05g

• .004g

Tags

NGSS.HS-PS1-7

MOLES OF CHALK LAB

Calculate the number of PARTICLES of chalk used to draw the picture.

• 2.40x10²¹

• 3.8x10²³

• 2.0x10²

• 8.5x10⁹

Identify the number of Chlorine ATOMS in 65.8 g CaCl_2.

• 7.14 x 10²³ atoms

• 8.71 x 10²³ atoms

• 1.22 x 10²³ atoms

• 3.57 x 10²³ atoms

How many moles are 98.3 grams of aluminum hydroxide, Al(OH)₃? (Atomic mass of Al = 27, H= 1, O = 16)

• 1.26 moles

• 0.8 moles

• 7,673.4 moles

• 150 moles

Tags

NGSS.HS-PS1-7

How many atoms are contained in 25 g of NaBr? (Atomic mass of Na = 23, Br = 35)

• 102.96 molecules

• 0.24 molecules

• 1.45x10²³ molecules

• 2.34 x 10²⁰molecules

How many moles are 98.3 grams of aluminum hydroxide, Al(OH)₃? (Ar Al=27, H=1, O=16)

• 1.26 moles

• 0.8 moles

• 7,673.4 moles

• 150 moles