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EXAM 1 CHEM
Terms in this set (50)
In this list, which substance can be classified as a chemical?
a. salt b. sleep c. cold d. heat e. temperature
which of the following would not be part of a study plan to learn chemistry?
study just before exams and quizzes
For the equation -10 - (-4) = ________.
16 is what percent of 80
a value of 345cm is a measure of
which of the following examples illustrates a number the is correctly rounded to 3 sig figs
20.0332g to 20.0g
what is the correct answer for the calculation of a volume in mL with measured numbers
which of the following measurements are NOT equivalent?
A doctor's order is 0.125 g of ampicillin. The liquid suspension on hand contains 250 mg/5.0 mL. How many milliliters of the suspension are required?
Diamond has a density of 3.52 g/mL. What is the volume in cubic centimeters of a diamond with a mass of 15.1 g?
which one of the following properties describes a liquid
particles are close together and move randomly
a temp if 41 F is the same as
an example of kinetic energy is
A cheeseburger from a fast food restaurant contains 19 g of fat, 20. g of carbohydrate, and 28 g of protein. How many kcal of energy does the cheeseburger contain? (The accepted caloric values for foods are 4.0 kcal/g for carbohydrate, 9.0 kcal/g for fat, and 4.0 kcal/g for protein.) Report the answer to 2 significant figures.
A diet has a total caloric intake of 1400 kcal. If the protein in the diet provides 35% of the kcal, the number of kcal of protein in the diet is
How many calories are required to raise the temperature of a 35.0 g sample of iron from 25 °C to 35 °C? Iron has a specific heat of 0.108 cal/g °C.
when a solid is converted directly to a gas, the change of state is called
Au is the symbol for
What elements are in hydroxyapatite, Ca5 (PO4)3OH, a major compound in human bones and teeth?
calcium, phosphorus, oxygen, hydrogen
which of the following is a characteristic of the modern periodic table?
the elements in each group have similar chemical properties
Which of the following properties is NOT a characteristic of the Group 1A(1) elements (alkali metals)?
most of them are liquids at room temperature
which of the following elements is a nonmetal
what is the symbol of the element Group 4A(14) and Period 2?
according to the atomic theory
atoms are neither created nor destroyed during a chemical reaction.
what is the mass number of an atom of potassium that has 20 neutrons?
Which of the following gives the correct numbers of protons, neutrons, and electrons in a neutral atom of Sn?
50 protons, 68 neutrons, 50 electrons
Given the following: X, X, X, and X. Which are isotopes of each other?
B (19= same protons) which means they are isotopes of each other
What is the element with the electron configuration 1s22s22p63s23p5?
what is the electron configuration for aluminum?
Which of the following electron configurations is impossible?
The number of electrons in the outer energy level of a neutral atom of boron (atomic number 5) is
What is the element with the abbreviated electron configuration [Kr]5s24d8?
The number of valence electrons found in an atom of a Group A element is equal to
its group number
Which of the following is the correct electron-dot structure for carbon?
C (4 equal spread dots)
The ionization energy of atoms
decreases going down within a group
Of the elements: B, C, F, Li, and Na., the element with the largest atomic radius is
Of the elements: B, C, F, Li, and Na. The element with the least metallic character is
how many valence electrons does nitrogen have?
In ionic compounds, ________ lose their valence electrons to form positively charged ________. (5,2)
What is the symbol for the ion with 19 protons and 18 electrons?
The number of electrons in an ion with 20 protons and an ionic charge of 2+ is
what is the correct formula for the oxide ion?
The correct formula for a compound formed from the elements Al and O is
Which one of the following compounds contains an ion with a 3+ charge?
The compound MgCl2 is named
What is the correct formula for iron(III) sulfide?
The name of PbO2 is
lead (IV) oxide
The formula of copper(I) sulfide is
Write the full electron configuration for Germanium (Ge)
BONUS: A 2.5 g sample of french fries is placed in a calorimeter with 500.0 g of water at an initial temperature of 21 °C. After combustion of the french fries, the water has a temperature of 48 °C. What is the caloric value (kcal/g) of the french fries? (Specific Heat of water is = 1 kcal/g. °C)