Exam 3

Liquid nitrogen boils at 77.3 K. What is this temperature in F? -320.5 ∘F -256.5 ∘F 320.53 ∘F -320.53 ∘F 320.5 ∘F

-320.5 ∘F

If an object displaces 3.4 quarts of water and weighs 4.36 pounds, what is the density of the object in g/ml? .62 g/ml None of these answers. .617 g/ml 1.6 g/ml 1.62 g/ml

.62 g/ml

What are the steps to the modern scientific method?

1) Make an observation in nature or state a problem 2) An educated guess or hypothesis is developed to explain the reasoning of the event or problem 3) Experiment is developed to test the hypothesis 4) The experiment is performed and data is collected 5) Data is then looked over and conclusions are made to support or refute the original hypothesis.

My older son weighed 31.2 pounds on his second birthday. What is his mass in grams? 14181. g 6.86 X 104 g 6.86 X 10-3 g 14164.8 g 1.42 X104g

1.42 X104g

According to Memory Alpha, dilithium has an atomic mass of 315, and an atomic number of 119. This means that a pure sample of dilithium with a zero charge would have: 119 protons, 196 neutrons, and 119 electrons. 119 protons, 119 neutrons and 315 electrons None of these answers. 119 protons, 315 neutrons and 119 electrons.

119 protons, 196 neutrons, and 119 electrons.

Perform the following operations: 2.333 + 123.2 + 1.2 + 22. = ?? 148.733 1.5 X 102 None of these answers. 149 148.7

149

Tl (the element thallium, with zero charge) 1s22s22p63s2364s23d2 1s22s22p63s23p64s23d104p65s24d105p66s25d106p1 None of these answers. 1s22s22p63s23p64s23d104p65s24d105p66s24f145d106p1 1s22s22p63s23p63d104s24p64d104f145s25p65d106s26p1

1s22s22p63s23p64s23d104p65s24d105p66s24f145d106p1

Guinness comes in a 75.4 fluid ounce container [BRILLIANT!!] How many ml is this? 2.22 X 103 ml None of these answers. 1.41 X 105 ml 7.06 X 105 ml 4.45 X 10-4 ml

2.22 X 103 ml

(3.652 X 1099) + (2.99 X 10100) = ??? 3.36 X 10100 3.3552 X 10100 3 X 10100 3.35 X 10100 3.4 X 10100

3.36 X 10100

Convert the following number into scientific notation: 341.5927 34.15927 X 101 3.41 X102 3.41 None of these answers. 3.415927 X 102

3.415927 X 102

Convert 3.24 miles into millimeters. 5.24 X 106 mm 5.22 X 103 mm 5,216,400.0 mm 5.22 X 106 mm 5.22 mm

5.22 X 106 mm

How many protons, neutrons, and electrons are in: 136C−4 6 protons, 6neutrons, 7 electrons. 6 protons, 7 neutrons, 6 electrons. None of these answers. 6 protons, 7 neutrons, 10 electrons. 13 protons, 6 neutrons, 9 electrons.

6 protons, 7 neutrons, 10 electrons.

If warp factor one (Warp 1) is 2.99792459 X 108 m/s, how fast is this in miles per hour? 670343386.583851 MPH 670343386.5 MPH None of these answers. 6.70343387 x108 MPH

6.70343387 x108 MPH

The smallest particle making up an element with identical properties is/are: Protons. Atoms. Ions. Neutrons. Molecules.

Atoms.

My daughter, on her sixth birthday was exactly 4.00 feet tall. How many cm is this? Both 122. cm and 1.22 X 102 cm. 121.92 cm 122. cm 1.22 X 102 cm. None of these answers.

Both 122. cm and 1.22 X 102 cm.

Which of the following is the best correct description of a heterogeneous mixture. Chunks are present and aqueous solutions will disperse light. Chunks are not present. An aqueous solution will disperse light. None of these answers. Chunks are present.

Chunks are present and aqueous solutions will disperse light.

Co is best described as s/an: None of these answers. Molecule Element Compound

Element

The Greek Scientific Method, according to the class handout, required the scientists to develop an experiment. True False

False

Two electrons can posses the same quantum numbers in a single atom. True False

False

Weight stays constant, and gravity will not effect or change its value for a matter sample. True False

False

Atomic radii increase: They are all the same size in a particular column From bottom to top in a column From top to bottom in a column. None of these answers.

From top to bottom in a column.

Which of the following is a correct description of a homogeneous mixture. Phase boundaries are present. An aqueous solution will disperse light. None of these answers. There is non-uniform concentrations of components. Chunks are present.

None of these answers.

Define potential energy

Potential energy is stored energy ready or waiting to do work. It has several forms.

The atomic number of an element or isotope will tell you the number of Correct! Protons Protons + Neurons Mortons Bosons Neutrons

Protons

LiNO3 can best be described as a(n): Pure Substance and compound. Compound only. None of these answers. Mixture only. Pure substance only.

Pure Substance and compound.

How could you separate and isolate ( PLACE EACH COMPONENT INTO A SEPARATE JAR) each component in a stepwise fashion given the following mixture and its component properties:

STEPS: 1)Pour off the veggie oil, as it will float on the top (decant). A mix of water,aluminum filings and iron filings will remain. 2)Strain the mix through filter paper. This will separate the iron and aluminum from the water. Put the water into a separate container. The iron and aluminum will be a mix. 3)Run a magnet over the iron and aluminum mixture. The iron will stick to the magnet (scrape it off into another container), and the aluminum will remain.

How many significant figures are there in the measurement 120 meters, and how did you arrive at your answer?

The measurement, as recorded has two significant figures. Any measurement which deals with a very large number and has trailing zeroes without a decimal point , you will not count the zeroes, PERIOD! END OF SENTENCE! GOOD NIGHT IRENE! If there was a decimal point, the zero would have been counted [then three significant figures....].

If I told you that sodium metal will react violently with water, this is an example of: a chemical property a physical property None of these answers. an income property an existential property

a chemical property

If you are told that iron metal is a solid at room temperature, this is an example of a: None of these answers. an existential property a physical property an income property a chemical property

a physical property

The smallest particles making up a compound, with identical properties is/are: molecules. ions. atoms. electrons. protons.

molecules.