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SCIENCE > General > Flashcards

General Flashcards

Coverage: Minimal solving

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Biology 101 flashcards
1
Q

All of the following are solutions except:
A. Brass
B. Coffee
C. Seawater
D. Milk

A

D. Milk

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2
Q

How many moles of CO2 does 88 grams of CO2 contain?
A. 2
B. 3
C. 4
D. 5

A

A. 2

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3
Q

What chemical bond is considered the strongest, requiring the most energy to break?

A

Covalent bonds

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4
Q

Give the mass number for an atom that has 10 protons, 10 electrons, and 11 neutrons

A

21

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5
Q

What phase of cell division involves the attachment of chromosomes to the spindle and alignment at the metaphase plate of the spindle?

A

Metaphase

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6
Q

What mass (g) of hydrogen gas is formed when 3.0 mol of Al reacts with excess HCl according to the following equation:
2Al + 6HCl → 2Al(Cl)3 + 3(H)2

A

9.0 g

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7
Q

Removing all lone pairs of electrons on the central atom of ClF3 would change the geometry form from?

A. trigonal pyramid to trigonal planar
B. square-shaped to trigonal pyramidal
C. T-shaped to trigonal planar
D. trigonal bipyramidal to trigonal planar

A

C. T-shaped to trigonal planar

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8
Q

What percent of a parent isotopes remains after 2 half-lives?

A

50%

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9
Q

What does the value 6.02 * 10^23 represent?

A

Avogadro’s number, the number of particles in a mole

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10
Q

If 230 g of ethanol (C2H5OH) is added to 500 g of water, what is the molality of the solution?

A. 0.46 m
B. 1 m
C. 2.17 m
D. 10 m

A

D. 10 m

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11
Q

What are the coefficients that will balance the formula equation below:

AlCl3 + NaOH → Al(OH)3 + NaCl

A

1, 3, 1, 3

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12
Q

When ice changes from a solid to a liquid at its melting point

A. its temperature increases
B. heat is given out
C. its particles gain energy
D. its particles become more ordered

A

C. its particles gain energy

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13
Q

A container weighs 90 g when empty and 110 g when fully filled with water. The density of water is 1.0 g/mL. When the container is filled with liquid X, it weighs 140 g.

What is the density of liquid X?

A

2.5 g/mL

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14
Q

Your flashlight has three identical 1.5 volt batteries in it, arranged in a chain to give a total of 4.5 volts. Current first passes through the first battery, all the way to the third on its way to the bulb.

Which battery will run out of chemical potential energy first?

A. First battery will run out first
B. Second battery will run out first
C. Third battery will run out first
D. All batteries will run out at the same time

A

D. All batteries will run out at the same time

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15
Q

If you balance out the equation below, what is the least sum of the coefficients?

MnO2 + HCl → Cl2 + MnCl2 + H2O

A

9

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16
Q

The radioactive half-life of a certain isotope is 2 days. What part of this isotope will remain after 8 days?

A

1/16

17
Q

Which of the following characterizes water?

A. Water releases only heat quickly
B. Water releases and gains heat quickly
C. Water releases and gains heat slowly
D. Water gains only heat slowly

A

C. Water releases and gains heat slowly

18
Q

1 atm is equal to ___ Torr?

A

760

19
Q

Of the first 101 elements, what is the most unstable?

A

Francium

20
Q

Which element is the most electronegative?

A

Fluorine

21
Q

What is the most common isotope of Carbon?

A

Carbon-12

22
Q

What is the molar concentration of NaCl solution that contains 30 g of salt per 200 mL of solution?

A

2.6 M

23
Q

What is the limiting reagent for the following chemical reaction if 24 g of hydrogen and 48 g of oxygen react to form water?

2(H)2 + O2 → 2(H)2O

A

Oxygen

24
Q

An analysis of a compound used in the production of aluminum is 32.79% sodium, 13.02% aluminum, and 54.19% fluorine. The empirical formula is?

A. Na3AlF6
B. Na5AlF8
C. NaAlF
D. Na3AlF3

A

A. Na3AlF6

25
Q

What process can be used on a liquid to separate its components without losing either component in the process?

A. Distillation
B. Evaporation
C. Sieving
D. Paper Chromatography

A

A. Distillation

SCIENCE (2 decks)

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