10/25/24 - Day 2 word problems

Multiple Choice

Which statement correctly compares and explains the difference in atomic size between two of the shaded elements?

• Lithium (Li) is a smaller atom than nitrogen (N) because it is in a smaller group number.

• Nitrogen (N) is a larger atom than arsenic (As) because it is higher in the periodic table.

• Arsenic (As) is a larger atom than cesium (Cs) because it has more valence electrons.

• Rubidium (Rb) is a smaller atom than cesium (Cs) because its electrons are closer to the nucleus.

Multiple Choice

Chitin is the material that forms the exoskeletons of arthropods like shrimp, crab, lobster, and insects. Chitin can be modified to produce a biomaterial called chitosan. Chitosan is water-soluble and has many applications in medical fi elds. The table describes characteristics of chitosan. Which medical problem can best be addressed by using chitosan?

• Bed sores are a type of tissue damage caused by patients remaining in one position for a long period of

  time.

• Infl uenza is a contagious respiratory illness caused by a virus, resulting in symptoms such as fever,

  cough, sore throat, and body aches in patients.

Word Problems Day 2

Today we are looking at more word problems, just as we did yesterday. Please write down the amounts (g) that you see throughout the word problem if needed. This is how I keep up with everything myself. If that is not how you do it, then please use your own method, but we must all come to the same conclusion and answer.

Multiple Choice

You have two beakers whose mass is 50 g each. You pour 50 g of water in one beaker and 100 g of oil in the second beaker. Placing both beakers on the scale you measure 250 g. You pour the water into the beaker with the oil and place the empty beaker to the side. You measure the mass of the beaker of liquid. You measure approximately how many grams (g) on the scale?

• 150 g

• 200 g

• 250 g

• 300 g

Multiple Choice

You have a 300 g bar of KitKat that you chop into pieces to make KitKat bars. After chopping the bar into small pieces you put all of the KitKat on a scale. The scale measures how many grams (g) of KitKat total?

• More than 300 g.

• Less than 300 g.

• 300 g

• I do not know, because we did not weigh the KitKat before.

Multiple Choice

How many elements are in the following chemical equation?

• 2
• 4
• 1
• 3

Multiple Choice

How many atoms of Sulfur are in the chemical equation below?

• 1

• 3

• 5

• 7

Multiple Choice

Some students decided to do an experiment with a can of Dr. Pepper. They opened a 120 g can of Dr. Pepper and left it open for a day. They then measured the Dr. Pepper can the next day and found it was 112 g. They then poured some of the Dr. Pepper in a glass and observed that it was no longer fizzy. Why?

• The carbon dioxide was released that made up the 8 g.

• The soda evaporated that made up the 8 g.

Multiple Choice

When 127 g of Chlorine reacts with 16 g of Sodium they form Salt, no Chlorine or Sodium is left over. How many grams of salt is produced?

• 127 g

• 127 g

• 143 g

• 286 g

Multiple Choice

You have 100 g of Mercuric Oxide. It can be broken down into 93 g of Mercury and 7 g of Oxygen. Is this chemical reaction following LOCOM?

• Yes

• No

Open Ended

Why was the answer yes for the last question?

Reminder: 100 g of Mercuric Oxide --> 93 g of Mercury & 7 g of Oxygen.

Drag and Drop

The ​ ​

Placeholder

is the reactant, while the ​

Placeholder

are the product. Hint: I want the chemical formulas.

Drag these tiles and drop them in the correct blank above

Mercuric Oxide

mercury & oxygen

93 g

7 g

100 g

Multiple Choice

If my starting mass in a closed system is 61.95 g, then what should my ending mass be?

• 31 g

• 61 g

• 62 g

• 61.95 g

Multiple Choice

Cu + S → CuS

5.5 g + 2.5 g → ? g

• 5.5 g

• 2.5 g

• 7 g

• 8 g

Multiple Choice

I have 400 g of dirt in a pot. I am planting a seed that has a mass of 1 g, and then I am pouring water in which has a mass of 49 g. How much will my mass be once it is all put together?

• 400 g

• 449 g

• 450 g

• 451 g

Poll

How are you feeling so far about the word problems you have done from yesterday and for today?

• Great!

• Good!

• Okay!

• Not so good!

~ Mrs. Moore

At this time, if you are good to go, please go to Google Classroom and complete the halloween game from yesterday or work on a Gimkit under "Extras."