Gold is one of the densest substance on earth. a gold bar that is 20cm by 5cm by 5 cm has a mass of 9kg. what is the density of gold?

The four types of mountains are folded, up warped, volcanic, and fault-block. true or false

How many total atoms are in PoCI

Chlorine gas can be prepared in the laboratory by the reaction of hydrochloric acid with manganese (IV) oxide. 4HCl (aq) + MnO2 (s) ⟶MnCl2 (aq) + 2H2O (l) + Cl2 (g) A sample of 37.7 g MnO2 is added to a solution containing 46.3 g HCl.

Zn (s) + 2 HCl (aq) →ZnCl2 (aq) + H2 (g) Zn (s) reacts with HCl (aq) according to the equation shown above. In trial 1 of a kinetics experiment, a 5.0g piece of Zn (s) is added to 100mL of 0.10MHCl (aq).

Nitrogen gas is used in fuel tank of aeroplane

How does bohrs model agree with Thomson model

How does the acid level in a lake affect how many fish live there?

The table below shows four samples of carbon dioxide and the temperature of the water that they were dissolved in. sampletemperature of water (°c) 178273355463which of the samples most likely had the lowest solubility?

Using the periodic table, which of the following can be predicted for an atom of chlorine? It has 35.45 protons It has 17 protons It has 35.45 neutrons It has 17 neutrons

Which of these represents a chemical change?