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Questions in chemistry

[Terjawab] An ionic bond can be formed when one or more electrons are: A) Equally shared between two atoms B) Unequally shared by two atoms C) Transferred from the nucleus of one atom to the nucleus of another atom D) Transferred from the valence shell of one atom to the valence shell of another atom

[Terjawab] Muscle tissue is made up of cells that contract and release to produce movement. Which process provides the energy that the cells need to contract? A. respiration B. meiosis C. photosynthesis D. mitosis

[Terjawab] What is the first step in creating a unit conversion factor?

[Terjawab] Copper has a density of 8.920 g/cm\(^3\). 1. What mass of copper will occupy 45 cm\(^3\)? 2. What volume of copper will have a mass of 1.0 kg?

[Terjawab] What volume, in liters, of a 2.00 M KCl solution contains 2.5 kg of KCl? Molar mass of KCl = 74.55 g/mol

[Terjawab] A sample of hydrogen gas has a volume of 8.56 L at a temperature of 0°C and a pressure of 1.5 atm. Calculate the number of moles of hydrogen present in this gas sample. Assume that the gas behaves ideally.

[Terjawab] What is the pH of a solution with a concentration of [tex]2.4 \times 10^{-5}[/tex] molar [tex]H_3O^+[/tex]? Show or explain the work used to solve this problem.

[Terjawab] Which of these statements is correct with respect to pH? A) The pH of a solution remains constant with increasing basicity. B) The pH of a solution decreases gradually with increasing basicity. C) The pH of a solution increases gradually with increasing basicity.

[Terjawab] Give four examples of properties of nonmetals that are exactly the opposite of the properties of metals.

[Terjawab] Can you give examples of carbon in our living environment?