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

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

Astudent made a graph plotting the progress of a reaction over time. the student forgot to label the y-axis of the graph. a graph is shown with two graph lines. one graph line starts at a higher position on the y axis and slopes downwards towards the right. the other graph line starts at a lower position on the y axis and slopes upwards towards the right. the two graph lines stop short of intersecting each other and continue as separate lines which gradually become straight and parallel to the x axis. a vertical line is shown at a point where the two graph lines finally became parallel to the x axis. this vertical line is labeled equilibrium. the title on the x axis is time and an arrow pointing towards the right is shown above time. the title on the y axis is left blank. what best explains the label that the student should use on the y-axis? amount, because as the amount of product decreases, the amount of reactant increases over time. reaction rate, because forward and backward reaction become equal at equilibrium. amount, because the amounts of reactants and products become constant after equilibrium is reached. reaction rate, as the rate of forward reaction increases and rate of backward reaction decreases over time.

When hydrochloric acid reacts with potassium hydroxide solution, the following reaction occurs. hcl (aq) + koh (aq) h2o (l) + kcl (aq) the reaction gives off heat energy, so it is an reaction.