Which of the following methods can be used to remove water from a mixture of sand and water?

Centrifuge

Filtration

Floatation

Magnetism

How do you write a Noble Gas Configuration for atoms of an element?

If 4.50 mol of ethane, C2H6, undergo combustion according to the unbalanced equation C2H6 + O2 CO2 + H20, how many moles of oxygen are required?

A gaseous compound having the empirical formula ch2 has a density of 1.88 g/l at stp. the molecular formula for this compound is (assuming ideal behavior) :

Consider the following exothermic reaction and predict how the change below will affect the concentration (increase, decrease, stay the same) of each component in the system as the equilibrium is reestablished.

What element is this? How do you know?

Brass is an example of

A molecule has four bonded atoms around a central atom. The central atom does not have any lone pairs of electrons. What is the geometry of the molecule? Bent Linear Trigonal planar Tetrahedral

Using the periodic tables, identify the heaviest member of each of the following groups: (a) alkali metals (b) chalcogens (c) noble gases (d) alkaline earth metals

Select the best answer for the question. 13. Which statement accurately describes the relationship between mass and weight? A. An object with twice the mass of another object will weigh twice as much B.

Which of the following accurately describes carbon atoms? A. When carbon atoms bond to other carbon atoms, they can only form triple bonds. B. Carbon atoms can bond to other carbon atoms. C.