Q: Gases on earth originated from comets and what events? Read this paragraph and choose the correct option from the provided answers: The earliest Earth did not have an atmosphere or free water. The planet was far too hot for gases and water to collect. The atmosphere and oceans that we see today evolved over time. The gases came from volcanic eruptions and from comets. Choices: - supernovas - black holes - tides - volcanic eruptions A:
volcanic eruptions

(Question)
Q: What decreases with the loss of subsequent protons? Read this paragraph and choose the correct option from the provided answers: Polyprotic Acids and Bases As you learned in Chapter 4 "Reactions in Aqueous Solution", polyprotic acids such as H2SO4, H3PO4, and H2CO3 contain more than one ionizable proton, and the protons are lost in a stepwise manner. The fully protonated species is always the strongest acid because it is easier to remove a proton from a neutral molecule than from a negatively charged ion. Thus acid strength decreases with the loss of subsequent protons, and, correspondingly, the pKa increases. Consider H2SO4, for example: Figure 16.5. Choices: - example strength - Movement strength - seawater strength - acid strength A:
(Answer)
acid strength

Ques: Q: What hormone does the endocrine system secrete to help cells absorb blood sugar? Read this paragraph and choose the correct option from the provided answers: After you eat and digest a sugary snack, the level of sugar in your blood quickly rises. In response, the endocrine system secretes the hormone insulin. Insulin helps cells absorb sugar from the blood. This causes the level of sugar in the blood to fall back to its normal level. Choices: - glucose - testosterone - Cortisol - insulin A:
Ans: insulin

(Q).
Q: What is often a result of untreated atherosclerosis? Read this paragraph and choose the correct option from the provided answers: Choices: - cancer - heart disease - seizures - a heart attack or stroke A:
(A).
a heart attack or stroke

Ques:Q: What substance can be identified by their atomic number and mass number? Read this paragraph and choose the correct option from the provided answers: Elements can be identified by their atomic number and mass number. Choices: - structures - compounds - solutions - elements A:

Ans:elements

Ques: Q: Subshells are subdivisions of what groupings of electrons that can be found surrounding atoms? Read this paragraph and choose the correct option from the provided answers: Carbon (atomic number 6) has six electrons. Four of them fill the 1s and 2s orbitals. The remaining two electrons occupy the 2p subshell. We now have a choice of filling one of the 2p orbitals and pairing the electrons or of leaving the electrons unpaired in two different, but degenerate, p orbitals. The orbitals are filled as described by Hund's rule: the lowest-energy configuration for an atom with electrons within a set of degenerate orbitals is that having the maximum number of unpaired electrons. Thus, the two electrons in the carbon 2p orbitals have identical n, l, and ms quantum numbers and differ in their ml quantum number (in accord with the Pauli exclusion principle). The electron configuration and orbital diagram for carbon are:. Choices: - globals - analogous - isotopes - orbitals A:
Ans:
orbitals