Exam 1 practice

Which image represents a heterogeneous substance?

What kind of change is depicted below?

A piece of plastic weighing 1.157 g has a volume of 1.48 cm³. A piece of wood has the same volume but weighs 3.85 g. The density of liquid X is 0.765 g/mL and the density of liquid Z is 1.13 g/mL. The two liquids do not mix in one another. If the plastic and wood are added to the two liquids, what is the order of layers from top to bottom in the container?

A general chemistry student found a chunk of metal in the basement of a friend's house. She measured the mass of the metal to be 383.6 g. Then she dropped the metal into a graduated cylinder containing 25.0 mL of water, and the water level rose to 43.0 mL. Of the following metals, which is the most likely?

A certain solid has a density of 8.0 g/cm³. If 4.0 g of this solid are poured into 4.00 mL of water, which drawing below most closely represents the volume of water after the solid is added?

The average distance between nitrogen and oxygen atoms is 115 pm in a compound called nitric oxide. What is this distance in millimeters?

The speed of light in a vacuum is 2.998 × 10⁸ m/s.What is this speed given in cm/min?

How much feet (ft) is contained in 0.112 km, given that 1 mile = 1.609 km and 5280 ft = 1 mile (exact)?

Convert 21.8 in³ to liters. (2.54 cm = 1.00 in)

Which symbol represents an atom that has 24 electrons, 26 protons, 30 neutrons?

Which of the following figures represents ¹⁵N? Unshaded spheres represent neutrons and shaded spheres represent protons.

In which of the following sets do all species have the same number of electrons?

Which of the following is a correct feature of the nuclear atom proposed by Rutherford?

Dalton's atomic theory is based on several assumptions, which are listed below. Which of these assumptions are still valid today?

Which of the following represent isotopes?

Two electromagnetic waves are represented to the right. Wave (b) has the

What is the wavelength in nm associated with radiation of frequency 2.8 × 10¹³ s⁻¹

Arrange the following spectral regions in order of increasing wavelength: infrared, microwave, ultraviolet, visible.

What is true about the electronic transition shown in the figure? The electron moves ___ the nucleus and energy is ___ ?

Electromagnetic radiation with the shortest wavelength will be emitted when an electron undergoes which of the following transitions?

What is the wavelength of the transition from n = 1 to n = 2?

Each of the following sets of quantum numbers is supposed to specify an orbital. Choose one set of quantum numbers that does not contain an error.

Which set of quantum numbers is valid and correctly represents the assigned orbital?

For an electron in a given atom, the larger n, the

For the fourth-shell orbital shown below, what are the principal quantum number, n, and the angular momentum quantum number, l?

The density of mercury, the only metal to exist as a liquid at room temperature, is 13.6 g/cm³. What is that density in pounds per cubic inch? (1 in = 2.54 cm; 1 lb = 454 g)