Grab bar and rubber mat are installed for safety purposes. Rubber mats are placed on the floor to prevent the person from sliding. This is understood since the bathroom floor is slippery. Grab bar is installed for something to grab on when you are walking. ANswer here is b. falling
When you heat up most substances it gives them more Kinetic energy and the substance becomes less arranged in an ordered state, further apart and move faster. therefore the answer is the first: They gain a higher average kinetic energy
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To a nonmineral and to fossil or gold or silver.
Answer:
536 grams
The balanced equation is Ba + 2 HBr ==> BaBr2 + H2, so that indicates that mole of Ba will react with 2 moles of HBr. So let's determine how many moles of HBr we have and from there, determine the number of moles of Ba needed and the mass of that much Ba. The number of moles of HBr is simply the product of volume of solution used and its molarity. So:
1.30 L * 6.00 mol/L = 7.80 mol
And since we only need half as many moles of Ba, 7.80 mol / 2 = 3.90 mol of Ba is needed. The atomic weight of Ba is 137.327 g/mol. So the mass needed is 137.327 g/mol * 3.90 mol = 535.5753 g.
Rounding to 3 significant figures gives 536 grams.