What noise does hydrogen gas make when ignited

Limestone originates because of: A. chemical precipitation B. chemical weathering C. physical weathering D. biological processes

An aqueous solution of cesium chloride is prepared by dissolving 52.3 g cesium chloride in 60.0g of water at 25°C. The volume of this solution is 63.3 mL. What is the molarity of the solution?

5.75 moles of H2 gas to liters at STP

An 11.75 g sample of a common hydrate of cobalt (ii) chloride is heated. after heating, 9.25 g of anhydrous cobalt chloride remains. what is the formula and name for this hydrate?

Is there any difference between carbon (iv) oxide and carbon (ii) oxide

The organisms living together in a community are interdependent upon one another. Look at the food web below. In which of the following ways is a puffin dependent upon salmon? A. Puffins have a commensalistic relationship with salmon. B.

2) Which of the following is a true statement? A: All the atoms of an element must be identical. B: Compounds may be separated by physical means. C: Mixtures may not be separated. D: Homogeneous is one type of compound.

How to tell the difference between ionic and covalent bonding?

The combustion of propane may be described by the chemical equation C3H8 (g) + 5O2 (g) ⟶3CO2 (g) + 4H2O (g) C3H8 (g) + 5O2 (g) ⟶3CO2 (g) + 4H2O (g) How many grams of O2 (g) O2 (g) are needed to completely burn 83.3 g C3H8 (g) ?

Was the relationship among temperature, heat, and thermal energy?