A gold coin contains 3.47*10^23 gold atoms. what is the mass of the coin in grams

Which of the following did Antoine Lavoisier correctly characterize as an element? light silicone dioxide mercury

Which reaction has a positive δs°? question 6 options: a. o2 (g) + 2h2 (g) → 2h2o (l) b. 2n2h4 (g) → 2nh3 (g) + h2 (g) c. 2no (g) → n2o2 (g) d. n2 (g) + 3h2 (g) → 2nh3 (g) ?

Which metal reacts quickly with cold water only when it is finely powdered? A) calcium B) copper C) sodium S) magnesium

Whose work did Niel Bhor build upon?

Does ch3ch2nh2 have hydrogen bonding intermolecular forces

An apple is placed on a scale. the scale shows that the apple weighs 1/4 a pound. this demonstrates that the apple has A: Atoms. B: Elements. C: Vitamins. D: Weight.

Identify Cobalt sulfride

If the reactants have a potential energy of 10.2 kJ/mol and the products have a potential energy of 15.7 kJ/mol, what is AH?

How to solve determine the final temperature when 450.2 grams of aluminum at 95.2°c is placed in an insulated calorimeter with 60.0 grams of water at 10.0°c?

Which of the following is true about a scientific hypothesis? A. The hypothesis must form a scientific theory. B. The hypothesis must be testable. C. The hypothesis must predict the outcome of the experiment. D.