Hi, i need these 3 answers to these question

what is the best prediction for what will happen when all of the hydrogens in the sun has undergone fusion?

a. helium nuclei will split to form hydrogen, and the sun will no longer release energy.
b. helium nuclei will split to form hydrogen, and the sun will continue to release energy.
c. helium nuclei will fuse to create heavier elements, but the sun will no longer release energy.
d. helium nuclei will fuse to create heavier elements, and the sun will continue to release energy.

which fields would most likely make use of spectroscopy techniques? check all that apply.

1.food production
2.medical research
3.scientific research
4.space research
5.weather forecasting

ingrid drew a diagram to compare two ways in which biodiversity can be protected.

which label belongs in the area marked y?

a. has the goal of releasing animals into the wild
b. is often done in nature preserves
c. usually protects entire ecosystems
d. focuses on increasing the population of a single species

Problem #3 (ch. 1, problem 15)the ideal gas law provides one way to estimate the pressure exerted by a gas on a container. the law isí‘ťí‘ť=푛푛푛푛푛푛푉푉mo re accurate estimates can be made with the van der waals equationí‘ťí‘ť=í‘›í‘›í‘›í‘›í‘›í‘›í‘ ‰í‘‰â’푛푛푟푟â’푞푞푛푛2í‘ ‰í‘‰2where the term nb is a correction for the volume of the molecules and the term an2/v2is a correction for molecular attractions. the values of a and b depend on the type of gas. the gas constant is r, the absolutetemperature is t, the gas volume is v, and the number of moles of gas molecules is indicated by n. if n = 1 mol of an ideal gas were confined to a volume of v = 22.41 l at a temperature of 0â°c (273.2k), it would exert a pressure of 1 atm. in these units, r = 0.0826.for chlorine gas (cl2), a = 6.49 and b = 0.0562. compare the pressure estimates given by the ideal gas law and the van der waals equation for 1 mol of cl2 in 22.41 l at 273.2 k. what is the main cause of the difference in the two pressure estimates, the molecular volume or the molecular attractions?

The p sub shell can hold up to 8 electrons in an atom. true or false?

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size