A heat because heat is the transfer of energy.
Answer:
Cl2, Chlorine molecule has a boiling point closest to that of argon.
This is because Chlorine is made up of discrete and simple molecules making up a simple molecular structure. The molecules associate through weak van der waal's forces of attraction hence low boiling point.
HCl <em>has</em><em> </em><em>strong</em><em> </em><em>hydrogen</em><em> </em><em>bonds</em><em>.</em>
F2 <em>is</em><em> </em><em>very</em><em> </em><em>small</em><em> </em><em>hence</em><em> </em><em>strong</em><em> </em><em>forces</em><em> </em><em>of</em><em> </em><em>attraction</em><em>.</em>
HF <em>has</em><em> </em><em>strong</em><em> </em><em>hydr</em><em>ogen</em><em> bonds</em>
Answer:
Molar mass of the unknown gas: 146 g /mol
Explanation:
At STP, any "ideal" gas is contained in a volume of 22.4L. This situation, for 1 mol of gas. In this case we have:
0.5 g / 4 g/mol = 0.125 moles of He
These amount of He occupies 0.125 mol . 22.4L / 1 mol = 2.8 L so the double of volume will be occupied by the unkown gas.
22.4 L / 1 mol = (2.8 L . 2) / x moles
22.4L / 1 mol = 5.6 L / x mol
x mol = 5.6L / 22.4L → 0.25 moles
To determine the molar mass of the unknown gas → 36.5 g / 0.25 mol = 146 g /mol
Answer:
2. Ne
Explanation:
Neon is an element. You cannot break down an element by chemical means.
1, 3, and 4 are wrong. They are all compounds, and compounds can be broken down by chemical means.
Answer:
Two
Step-by-step explanation:
In <em>multiplication problems</em>, your answer can have no more significant figures than the number with the <em>fewest significant figures</em>.
Start with the calculation inside parentheses:
5.1 × 10.6 = 54.060 000 00 (by my calculator)
There are three significant figures in 10.6, but only two in 5.1.
In this were a number you had to report, you would round to <em>two</em> significant figures and report the answer as 54.
54.060 000 00 → 54 (to two significant figures)
However, you must multiply this intermediate answer by 2.524.
Therefore, you multiply the number in the calculator by 2.524 and get
54.060 000 00 × 2.524 = 136.447 4400
<em>NOW</em>, you round to two significant figures and report the answer as <em>140</em>.
