Answer:
1,100 J.
Explanation:
- The amount of heat added to a substance (Q) can be calculated from the relation:
<em>Q = m.c.ΔT.</em>
where, Q is the amount of heat released from ethanol cooling,
m is the mass of ethanol (m = 50.0 g),
c is the specific heat of ethanol in the gas phase, since the T is cooled above the boiling point (c = 2.0 J/g °C),
ΔT is the temperature difference (final T - initial T) (ΔT = 79.0 °C – 90.0 °C = - 11.0 °C).
<em>∴ Q = m.c.ΔT</em> = (50.0 g)(2.0 J/g °C)(- 11.0 °C) = <em>- 1100 J.</em>
<em>The system releases 1,100 J.</em>
B. Oxygen. Hope this helps.
Answer: 1and 4
Explanation: iron is an element not an alloy. An ionic lattice is not bonded covalently.
<span> A cubic centimeter of quart olivine and gold weigh 2.5, 3.0, and 19.8 grams resperctively. </span>
It is not B it is A, wave 1 waves are more spread apart so that means it has a bigger wave length, and the frequency is how many waves there are in one second so the smaller waves would have the higher frequency so it would be A hope this helps.