CHEM FINAL EXAM

Exam 1

If a normal CT scan delivers 700mrem of radiation, ho wmany CT scans would a paitent have to recive to feel milds radiation sickness?

71 Scans

Exam 1

Complete the following Nuclear reaction: 218/82 Pb > ? and 0/-1 e

214/83 Be

Exam 1

What is the best coefficient for 02 when this equation is balanced with the lowest whole number coefficients? _C3H8 + _02 > _CO + _H2O

7

Exam 1

Convert 152 miles into kilometers, using significant figures, given that 1 mile =1.609 kilometers

244.6 Km

Exam 1

Wirite the nuclear decay question for the following emitter: Bismuth-210, an alpha emitter

210/83 Bi > ? + 206/81 Ti

4/2 He

Exam 1

Thallium-201 is a radioisotope used in brain scans. If the recommended dose is 3.0 mCi and a vial that contains 60 mCi in 50 mL how many milliliters should be injected?

25 mL

Exam 1

Which quantity measures the amount of space occupied by an object?

Volume

Exam 1

Convert 89 Calories into joules

3.7 × 10² kJ

Exam 1

On an archaeological dig, a wooden canoe is unearthed and analyzed for carbon-14. About 25% of the carbon-14 that was initially present remains. What is the approximate age of the canoe? The half-life of carbon is 5730 years.

11,500 years

Exam 1

How many valance electrons are present in a neutral Mg atom?

2 Electrons

Exam 1

The formula for a sulfide ion is:

S²-

Exam 1

How many protons and electrons are in a copper (1) Ion?

29 protons and 28 electrons

Exam 1

Select the answer witht he coefficients to balance the chemical reaction shown.

_NO2 (g) + _H2O (L) > _HNO3 (aq) + _NO (g)

3,1,2,1

Exam 1

A vial of amoxicillin contains 500 mg in 2.0 mL of solution. What volume of the solution contains 180 mg of the drug?

0.72 mL

Exam 1

Which of the following statements is UNTRUE?

In positron emission the atomic number and mass by number both decrease by 1

Exam 1

The amount of a radioisotope that remains after two half-lives have passed is:

25%

Exam 1

What particle is missing from the following nuclear reaction?

240/92 U > ? + 236/90 Th

4/2 He

Exam 1

An adult human femur weighs about 225g and has a volume of 118 cm². Calculate the density of this bone.

1.91 g/cm

Exam 1

A person can burn 550 Calories running at a moderate pace for 1 hour. Calculate the number of Calories that would be burned if the person only ran for 22 minutes.

200 Calories

Exam 1

A patient undergoing open heart surgery is to receive 175 units/Kg body weight of medicine. If the medicine contains 5000 units/ml, how many milliliters should be injected into a 250-lb patient?

4.0 mL

Exam 1

A prescription for amoxicillin comes in an oral suspension that is 250mg/5.0 ml. A patient is prescribed 500 mg every 6 hours. How many teaspoons should the patient take? (1 tsp = 4.93 mL)

8 Tsp a day

Exam 1

A patient has an order for a drip rate of 7.0 mg of medicine per hour. The IV drip is provided from a pharmacy as exactly 1000mg in 500mg of dextrose 5% in water. What is the flow rate of the pump in milliliters per hour?

3.5 mL/hr

Exam 1

Provide the number of protons and electrons in a chlorine atom

17 protons and 17 electrons

Exam 1

Which of the following elements contain 6 valence electrons?

Se

Exam 1

Calculate the time required to deliver 2.5 L of solution through an IV that has a drop factor of 25 gtt/ml if the drip rate is 140 gtt/min

14 hours

Exam 1

Determine the number of protons, neutrons and electrons in 16/8 O

8 protons, 8 electrons, and 8 neutrons

Exam 1

Write the symbolic notation of Xenon with 89 neutrons

143/54 Xe

Exam 1

Which of the following is an element?

Iodine

Exam 1

What is the correct symbol for the element Tungsten?

W

Which of the following is a volume unit?

mL

Which of the following statements is true?

An electron has no charge and has negligible mass.

Exam 1

Two atoms must represent the same element if they both have the smame:

Atomic number

Exam 1

Osium-202 has how mant neutrons in its nucleus

126

Al³+ is an isoelectronic with a noble gas. Please provide the symbol for that gas.

Ne

Exam 1

Give the formula for the ionic compound formed by phosphate ion and sodium ion

Na3PO4

Exam 1

Give the formula for Magnesium oxide, used as a mineral supplement

MgO

Exam 1

A triple bond involves the sharing of _ electrons between the atoms

6

Exam 1

Which of the following formula is INCORRECT for an iron (1) compound?

FeCl3

Exam 1

What is the correct name for RbNO3

Rhubidium (1) Nitrate

Exam 1

How many covalent bonds do Cl atoms tend to form?

1 covalent bond

Exam 1

Indicate wether SiCl, is ionic or covalent and give its correct name

Covalent, silicon tetrachloride

Exam 1

Select the correct lewis structure for CH4O

PICTURE

Exam 1

For the element in group 5A, period 2, please selecr the correct answer regarding the name, element, symmbol and wether its a metal or non-metal.

Nitrogen, N, non-metal

Exam 1

Isotopes always contain:

The same number of protons but different number of neutrons

Exam 1

The correct symbol for gamma ray is:

0/0 Y

Exam 1

An atom of helium has how many valence electrons?

2

Exam 1

Which of the following ions does not have 18 electrons?

o²-

Exam 1

The total number of valence electrons in a molecule of CH4O is:

14

Exam 2

The activation energy is the energy that:

Is required to make the reaction occur

Exam 2

Which of the following factors influence the rate of a reaction?

Temperature, reactant, concentration, and a catalyst.

Exam 2

Calculate the molar mass for C2HBrClF3

197.38 g/Mol

Exam 2

How many total atoms are in 5.0 moles of O

3.0 × 10^(24) atoms

Exam 2

The recommended daily allowance of niacin (vitamin B3) is 14 mg per day for women. The molecular formula for niacin is C6H5NO2. Calculate the number of moles of niacin in 14 mg.

6.8 × 10^(19) molecules

Exam 2

Which of these molecules is an alcohol?

PICTURE

Exam 2

What functional groups are present in the following structure?

CH3CH=CHCH2OH

Alcohol and Alkene

Exam 2

Which of the following structures is correct for 1,2 - dibromo - 2 - methyl butane?

PICTURE

Exam 2

The name of the following alkyl substituent is:

CH3-

Methyl

Exam 2

How many carbon atoms are in a heptane molecule?

7

Exam 2

Which of the following is a structural isommer of hexane?

3-Methylpentane

Exam 2

Which of the following molecules is a structural isomer of hexane?

PICTURE

Exam 2 determine the shape around the circled atom in the following lewis structure

Bent

Identify all the chiral carbons/chiral center(s) in Vitamin C

Carbons 1 and 4

Exam 2

A thimble of water contains 4.0 × 10^(21) molecules. The number of moles of H2O is:

6.6 × 10-3 mol

Exam 2

Identify the structure of y-linolenic acid

PICTURE

Exam 2

Identify the balanced chemical equation for the double exchange reaction between CuCl (aq) and Na2S (aq)

CuCl (aq) + Na2S (aq) > CuS (s) + 2 NaCl (aq)

Exam 2

How many O atoms are in 200 moles of Na2O2

2.41 × 10^(24) atoms

Exam 2

Two reaction coordinate diagrams for the same reaction are provided. Which diagram represents a catalyzed reaction?

Line B

Exam 2

One gram of alcohol provides 7 calories, and one gram of carbohydrate provides 4 Calories. Calculate the number of Calories in a 5 fluid oz glass of red wine that contains 2.5 grams of carbohydrates and 13.7 g alcohol

110 caloris

Exam 2

How many H atoms in 4.00 moles of CH4?

9.64 × 10^(24) atoms

Exam 2 What is teh shape of this molecule

bent

Exam 2

The approximate bond angles. Between atoms in a. molecule with a triagonal pyramidal molecular geometry are:

<109.5 Degreese

Exam 2

Given the electronegatives below, which of the following covalent single bonds is the most polar?

Element- H C. N. O

Electronegativity- 2.1 2.5. 3.0. 3.5

O-H

Exam 2

identify the polar covalent bond with a dipole moment PICTURE

No polar covalent bond

The compound is: PICTURE

Non-polar

The skeletal structure for C4 H10 is:

PCITURE

What is the correct condensed structure for the satrudated fatty acid that contains 16 carbon atoms?

CH3CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2COOH

Exam 2

Name the functional group ciricled in the following molecule

Amine

Exam 2

Identify the correct skeletal structure for isopropylcyclohexane?

PCITURE

Exam 2

Identify the trans-stereoisomer of 1-chloro-4-flurocyclohexane

PICTURE

Exam 2

Which represents a skeletal structure?

pick the skeletal structure

Exam 2

For the following compounds, indicate whether they CAN EXIST as Cis-trans Stereoisomers

2 and 4

Exam 2

The vision process in animals involves the change of the double bond in retinol from its cis form to its trans form; the structures of cis and trans retinal are shown below. Identify the cis and trans retinol

1- Trans-retinal 2- Cis-retinal

Exam 2

Which of the following molecules is non-polar?

Ch3Ch2

Exam 2

What type of reaction is illustrated in this diagram?

Synthesis

Exam 2

Which of these skeletal structures is NOT a cycloalkane

triangle with double bond

Exam 2

Which of these hydrocarbon molecular formulas could NOT be a cyckloalkane?

C7H16