Which of the following elements is an alkaline earth metal?
A) Cu
B) Ti
C) Br
D) Cs
E) Mg
Answer: E) Mg
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Chemistry Chapter 2
- Determine the answer to the following equation with correct number of significant figures: 106 ÷ 9.02 × 1.9 =
- Determine the answer for the equation below with correct number of significant figures: 1.2 × 1.79 =
- Determine the answer for the equation below with correct number of significant figures: 3.215 × 13.2 ÷ 0.218 =
- How many significant digits should be reported in the answer to the following calculation? (4.3 - 3.7) × 12.3 =
- In which set do all elements tend to form anions in binary ionic compounds?
- Write the name for FeS.
- Determine the volume of hexane that contains 5.33 × 1022 molecules of hexane. The density of hexane is 0.6548 g/mL and its molar mass is 86.17 g/mol.
- Determine the molecular formula of a compound that is 49.48% carbon, 5.19% hydrogen, 28.85% nitrogen, and 16.48% oxygen. The molecular weight is 194.19 g/mol.
- Combustion analysis of 63.8 mg of a C, H and O containing compound produced 145.0 mg of CO2 and 59.38 mg of H2O. What is the empirical formula for the compound?
- Write a balanced equation to show the reaction of gaseous ethane with gaseous oxygen to form carbon monoxide gas and water vapor.
- When two elements form two different compounds, the masses of element B that combine with 1 g of element A can be expressed as a ratio of small whole numbers. Which law does this refer to?
- Give the number of electrons in P-3.
- Predict the charge that the ion formed from bromine would have.
- Which of the following elements is a nonmetal?
- Which of the following elements is a noble gas?
- The atomic mass for cadmium is
- Gallium has an atomic mass of 69.723 amu. The Ga-69 (68.926 amu) is 60.11%. What is the amu of the other isotope?
- Which of the following contains the MOST atoms? You shouldn't need to do a calculation here.
- How many Li atoms are contained in 97.9 g of Li?
- Calculate the mass (in g) of 1.9 x 1024 atoms of Pb.
- A mass of mercury occupies 0.550 L. What volume would an equal mass of ethanol occupy? The density of mercury is 13.546 g/mL and the density of ethanol is 0.789 g/mL.
- Choose the element from the list below.
- Choose the homogeneous mixture from the list below.
- Which of the following are examples of a chemical change?