Which of the following is made up of a coordinate covalent bond?

A. sodium chloride (NaCl)

B. ammonia (NH3)

C. chlorine (Cl2)

D. aluminium bromide (AlBr3)

E. carbon monoxide (CO)

An equilibrium mixture of SO 2, O 2, and SO 3 gases at 1500 K is determined to consist of 0.344 mol/L SO 2, 0.172 mol/L O 2, and 0.56 mol/L SO 3.

Where on the Earth would you have to be in order to view a lunar eclipse?

Could another liquid be used just as effectively as water in a calorimeter

How much heat is needed to change 5g of ice at 0°C to water at 50°C?

Which answer choice correctly names the element that Mendeleev predicted would be discovered and placed in the aluminum column? carbon (C) sodium (Na) helium (He) gallium (Ga)

Hydrogen peroxide decomposes to water and oxygen at constant pressure by the following reaction: 2H2O2 (l) → 2H2O (l) + O2 (g) ΔH = - 196 kJ Calculate the value of q (kJ) in this exothermic reaction when 3.

What is the concentration of hydronium in each of the following cases: [OH-] = 10-12 M? [OH-] = 10-2 M?

Which statement best explains why elements are matter? An element is a physical substance that has mass and takes up space. Elements are pure substances that cannot be divided chemically. Each element is a pure substance composed of one type of atom.

Which of the following best describes what causes the phases of the moon? The alignment of the sun, Earth, and moon The speed of the moon around the Earth The speed of the Earth around the sun The alignment of the planets

At which temperature would atoms of a He (g) sample have the greatest average kinetic energy? (1) 25°C (3) 273 K (2) 37°C (4) 298 K