AnswersNY-Chemistry Term 1 HillcrestCumulative Exam

Cumulative Exam — Cumulative exam Answers

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The table describes solids and plasmas.Which statement can be placed in the blank cell to make the information in the table accurate?

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A
can be crystalline
B
can be amorphous
C
are made of charged particles
D
are made of neutral particles
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A sample of ammonia reacts with oxygen as shown.4NH3(g) + 5O2(g) 4NO(g) + 6H2O(g)What is the limiting reactant if 4.0 g of NH3 react with 8.0 g of oxygen?

Question illustration
A
O2 because it produces only 0.20 mol of NO.
B
NH3 because it produces only 0.20 mol of NO.
C
O2 because it produces two times less NO than NH3.
D
NH3 because it produces three times more NO than O2.
43

What is the true ratio of atoms in a molecule or formula unit called?

A
the molecular formula
B
the molar mass
C
the percent composition
D
the empirical formula
44

Which is true of transition metals when moving from left to right on the periodic table?

A
The d sublevels are not filled across the period.
B
The cation radii become larger across the period.
C
Atomic radii increase slightly and then start to decrease.
D
Atomic radii decrease slightly and then start to increase.
45

An electron in a hydrogen atom moves from level 1 to level 4. The electron then drops from level 4 to level 2. Which statement describes the most likely result?

A
The energy absorbed in the first move equals the energy released in the second move.
B
The energy absorbed in the first move is greater than the energy released in the second move.
C
The energy released in the first move equals the energy absorbed in the second move.
D
The energy released in the first move is greater than the energy absorbed in the second move.
46

The diagrams below represent the four states of matter. Diagram 1 Diagram 2 Diagram 3 Diagram 4Which diagram represents a gas that has been ionized?

Question illustration
A
diagram 1
B
diagram 2
C
diagram 3
D
diagram 4
47

The properties of two elements are listed below.ElementAtomic radius(pm)Ionic radius(pm)First ionization energy(kJ/mol)Electron affinity(kJ/mol)ElectronegativityBr1141951140–3253.0K243152.2418.8–48.40.82Which prediction is supported by the information in the table?

A
K will give up an electron more easily than Br.
B
Both K and Br will have the same pull on electrons.
C
K will have a smaller size in comparison to Br.
D
Both K and Br will produce ions of the same size.
48

Consider the heating curve.In which region are most particles moving the fastest?

Question illustration
A
2
B
3
C
4
D
5
49

Kumar is producing the photoelectric effect by using red light. He wants to increase the energy of emitted electrons. Based on the research of Albert Einstein, what is the best way for him to do this?

A
Increase the intensity of red light.
B
Decrease the intensity of red light.
C
Use a different colored light that has a higher frequency.
D
Use a different colored light that has a lower frequency.
50

When a drawing of a circle made in the center of a piece of paper with a black marker gets wet, the marker bleeds, and as the water moves through the paper the ink separates into several colors. What method of separation does this describe?

A
evaporation
B
distillation
C
filtration
D
chromatography

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