NGSS.MS-PS1-5

Which number should go in the blank?
2 Na+ _ Cl₂ -> 2 NaCl

• 1
• 2
• 3
• 0

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NGSS.MS-PS1-5

In the reaction AB-----> A + B reactant AB has 12g and product B has 5g. How many grams should product A have?

• 17g
• 2g
• 7g
• None of the above

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NGSS.MS-PS1-5

The amount of matter something contains is its ______________.

• gas
• solid
• weight
• mass

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NGSS.MS-PS1-5

For the reaction represented by the equation Cl₂ + 2KBr → Br₂ + 2KCl, how many grams of potassium chloride can be produced from 356 grams potassium bromide?

• 749 g
• 225 g
• 479 g
• 814 g

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NGSS.MS-PS1-5

Magnesium chloride + Sodium → ?

• Sodium chloride + Magnesium

• Magnesium chloride + Sodium (No change)

• Sodium magnesium + Chlorine

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NGSS.MS-PS1-5

During a reaction, atoms are

• created

• destroyed

• neither created or destroyed - just rearranged

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NGSS.MS-PS1-5

Mass is often constant for a given object.

• True

• False

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NGSS.MS-PS1-5

Chemical X has a mass of 20 grams, and chemical Y has a mass of 30 grams. If the two chemicals are mixed and a complete chemical reaction takes place, what is most likely the mass of the product?

• 20 grams

• 30 grams

• 50 grams

• 100 grams

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NGSS.MS-PS1-5

Two different liquids are poured together in an open container. Bubbles begin to form. After the bubbling stops, it is determined that the total weight of the two liquids is less than before they were poured together. Which best describes this observation?

• Some of the atoms during the reaction escaped into the air.

• Some of the atoms during the reaction were destroyed.

• Some of the atoms during the reaction became heavier.

• Some of the atoms during the reaction changed to a different kind of atom.

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NGSS.MS-PS1-5

If reaction starts with 20g of reactants it should produce 

• a total of 40g of products
• a total of 10g of products
• a total of 80 g of products
• a total of 20g of products

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NGSS.MS-PS1-5