What is the number of valence electron of (Na).?

When heat is applied to a solid and a gas begins to form, the change in entropy is positive. true fals?

Which of the following is NOT a basic feature of an electric circuit? a. resistor c. single throw b. cell d. wire

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Do all crystals have the same internal arrangements?

The mass of a substance is independent of the amount of the substance, while density depends on the amount of the substance.

Write the Chemical formula for the conjugate base of the following Bronsted-Lowry acids. A) H2SO4 B) HPO4^2-

The heat from the bonfire is transferred to the student's hands through the process of

How many atoms are present in 0.0845 moles of tungsten (W) ?

Indicate which reactions are redox reactions. check all that apply. check all that apply. 2na (s) + cl2 (g) →2nacl (s) cd (s) + pb2 + (aq) →cd2 + (aq) + pb (s) pb (no3) 2 (aq) + 2licl (aq) →pbcl2 (s) + 2lino3 (aq) c (s) + o2 (g) →co2 (g)

If the mass of a material is 119 grams and the volume of the material is 20 cm3, what would the density of the material be?