Answer: the plum pudding model
Explanation:
for A P E X i just took the test
<span>A.H2O = water, so it is a liquid at room temperatures (melting point = 0C) and melting point must be below 20C
B.HCl = A gas at room temperatures, so melting point (-114C) is definitely lower than 20C.
Melting points of the aqueous solution (solution in water) at different concentrations are all below that of water, i.e. 0C.
C.CH4 = A gas at room temperatures, so melting point (-182C) must be below 20C.
D.MgCl2 = A white powdery solid at room temperatures, so its melting point (714C) must be above 20C (So this is the only one among the four choices that melts above 20 ° C).</span>
G We've all blown up balloons. When you blow into a balloon, you are putting in more moles of gas. Let's say that on the second exhalation (blow) you blow in the exact same number of moles as you did with the first exhalation. So, you doubled the number of moles in the balloon. If the temperature and pressure remained constant, what is true about the volume of the gas in the balloon
Answer:2370934oiuaroiufaopruaeportourieiiiiriruoituweproitupwoierutpoiweurtpoiwuerptoirpoueportupoeriutpoieurpoiueroptiuwepotupeoritutpoieru
Explanation:eroptiueorupoeurtuertpoueorptupoerupoerutpoiweurtpoiuertopiuertopiueropituepoirutpoewrutopeurtouertpouerpotuwpeorutoutpourtpoiwuretpouwroptuepotuoeutpowiutpoieurtpoerutpowiutowuerpotiuepotuee
Answer is: an instant ice pack becoming cold, splitting a gas molecule and baking bread.
<span>Endothermic reaction
is chemical reaction that absorbs more energy than it releases.
</span>In ice pack, <span>reaction absorbs heat from the surroundings (endothermic reaction), lowering the surrounding temperature.
For splitting molecule and baking bread we must add energy to break bonds between atoms.</span>
