Answer:
Mass is the quantity of an object.
Weight is the force with which the object is attached towards the earth.
Hope it helps
Answer:
NH4+
Explanation:
NH4+ is the acid and NH3 is the base, so NH4+ is the stronger acid.
<span>H2O2
First, let's determine how many moles of hydrogen and oxygen atoms we have. Start by looking up the atomic weights of those elements:
Atomic weight hydrogen = 1.00794
Atomic weight oxygen = 15.999
Moles hydrogen = 1.33 g / 1.00794 g/mol = 1.319522987 mol
Moles oxygen = 21.3 g / 15.999 g/mol = 1.331333208 mol
We now have a ratio of 1.319522987 : 1.331333208 and we want a ratio of small integers that is close. Start by dividing all the numbers in the ratio by the smallest value, giving:
1 : 1.008950371
This ratio is acceptably close to 1:1 so I assume the formula is of the form HnOn where n is a small integer. Let's initially assume that n is 1, so the mass would be
1.00794 + 15.999 = 17.00694
Obviously 17 is far smaller than 34.1. So let's divide 34.1 by 17.00694 and see what n should be:
34.1 / 17.00694 = 2.005063815
So the formula we want is H2O2, which is hydrogen peroxide.</span>
<u>Answer:</u> The correct answer is Option 1, Option 2 and Option 3.
<u>Explanation:</u>
A base is defined as the substance which releases hydroxide ion when dissolved in water.
For the given options:
- <u>Option 1:</u>
When ammonia is dissolved in water, it produces ammonium hydroxide which forms a basic solution.
- <u>Option 2:</u>
When sodium oxide is dissolved in water, it produces ammonium hydroxide which forms a basic solution.
- <u>Option 3:</u>
When lithium hydroxide is dissolved in water, it produces aqueous lithium hydroxide which forms a basic solution.
- <u>Option 4:</u>
When phosphorus pentoxide is dissolved in water, it produces phosphoric acid which forms an acidic solution.
Hence, the correct answer is Option 1, Option 2 and Option 3.
B That the answer (hope this helps)