Answer:
Oxygen
Explanation:
If two balloons are filled with hydrogen gas and helium gas respectively, then we want to identify what gas is in each balloon, we have to do so by exposing the both balloons to flame in an oxygen atmosphere.
Hydrogen combines with oxygen in the presence of a flame with quite a loud sound and the flame is sustained but when a flame is brought near helium gas in a balloon, the gas will only make a little sound when exposed to the flame and extinguish the flame.
The reason for the explosion of the gas in the hydrogen balloon is that combustion of hydrogen gas is exothermic. The heating up of surrounding air molecules leads to a sudden explosion.
However, the helium balloon makes a little sound when the balloon is ruptured releasing helium gas which extinguishes the flame.
Answer:
Dependent variable are those variables that changes with the change in variables that affects it. (IG - leo_muan)
Explanation:
Dependent variable responds or gets affected to change. They are not constant. It can be possible that dependent variable is relying on independent variable as independent variable does not change with change of any of the factor in an experiment.
Sometimes, mentioning not the units leads to insufficient data of the variables. A constant is something whose value cannot be changed and is used for comparison purpose. According to the question, Rose is constant, height is dependent variable , different types of soil are independent variable.
Answer:
nuetrons
Explanation:
some helium atoms just a little thick and packing extra neutrons
<span>No, the battery does not need to be recharged.
The balanced reaction is:
NaOH + H2SO4 ==> Na2SO4 + H2O
So for each mole of H2SO4, one mole of NaOH is needed. So let's determine the number of moles of NaOH we used:
0.03126 L * 0.621 mol/L = 0.01941246 mol
So we now know that 0.01941246 moles of H2SO4 was present in the sample. And since molarity is defined as moles per liter, we can divide the number of moles we had by the number of liters to get molarity. So:
0.01941246 / 0.002 = 9.706 M.
This molarity is way too high to be reasonable. So let's do a sanity check on the original measured quantities. Our original sample is 2.00 ml and we titrated with 31.26 ml or 31.26/2 = 15.63 times as much base. So the molarity should be that value times the molarity of the base, which is 15.63 * 0.621 = 9.706 which matches the original calculated figure.
The conclusion is that the battery does not need to be recharged. If anything, it's over charged. Also, it's highly likely that this problem has a typo and that the figures given are incorrect. Please check your original problem before using this as your answer.</span>