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by BlastRoom
Students track atoms and mass during chemical reactions in closed systems.
#us_grade_7_science
20 questions
One question set, multiple game modes. Tap any game to see it in action. Not sure which to pick?
Answer to place stones and capture territory.
Outrun the snow together.
Earn blasts, then hunt the other team.
Answer to earn energy, then climb.
The class blasts through walls together.
Bid on mystery lots. Most money wins.
Sell tours. Nice, standard, or a total scam.
Answer, restock, and serve the rush.
More correct answers pulls the rope your way.
Answer, then shoot down the alien wave.
Answer, then tap to leap the frozen ridge.
In a sealed bag, 30 g of vinegar reacts with 5 g of baking soda. No gas escapes. What is the total mass after the reaction?
A stoppered flask has a total mass of 82 g before two clear liquids react. The flask stays closed. What total mass should it have after the reaction?
In a closed jar, 12 g of iron reacts with 4 g of oxygen trapped inside. What is the total mass of the jar's contents afterward?
A sealed bottle contains 98 g of water and a 2 g tablet. The tablet fizzes completely. What is the total mass inside the bottle after fizzing?
A closed cup holds 60 g of solution A and 15 g of solution B. They form a precipitate. What total mass is inside afterward?
A sealed container has a mass of 250 g before a reaction produces a gas. The gas remains inside. What mass should the container have afterward?
A sealed bag mixes 40 g of calcium chloride solution with 10 g of baking soda solution. What mass should the contents of the bag have after reacting?
A model shows 2 H2 molecules reacting with 1 O2 molecule to form 2 H2O molecules. How many hydrogen atoms are in the products?
A model shows CH4 reacting with 2 O2 to form CO2 and 2 H2O. How many oxygen atoms are in the products altogether?
A model shows CaCO3 breaking into CaO and CO2. How many oxygen atoms must be counted in the products altogether?
In the model N2 + 3 H2 -> 2 NH3, how many nitrogen atoms are in the products?
A model shows 2 Na atoms reacting with 1 Cl2 molecule to form 2 NaCl units. How many sodium atoms are in the products?
A reaction model shows 2 CO molecules plus 1 O2 molecule forming 2 CO2 molecules. How many oxygen atoms are in the products?
A model shows 4 Al atoms reacting with 3 O2 molecules to form 2 Al2O3 units. How many aluminum atoms are in the products?
A reaction starts with 1 carbon atom and 4 hydrogen atoms. What product model would conserve the atoms?
A reaction starts with 2 magnesium atoms and 2 oxygen atoms. What product model conserves the atoms?
Reactants have 4 hydrogen atoms and 2 oxygen atoms. What water-product model follows conservation of atoms?
A reaction begins with 1 sodium atom and 1 chlorine atom. What product model keeps the atom count unchanged?
A model starts with 2 carbon atoms and 6 hydrogen atoms. What product model follows conservation of atoms?
In the model CaCl2 + Na2SO4 -> CaSO4 + ?, what must replace the ? to conserve atoms?
Crack the passcode before the zombies get in.
Answer, then swat bugs for bonus points.
Race through questions at your own speed.
Same question on every screen. Fastest wins.
Pick a tile, answer, hit bonuses and steals.
Reactions That Release or Absorb Energy
20 questions
