Pure gold has a density of 19.3 g/cm3.

The diagram shows light striking a pane of glass. some of the light is reflected, and some of the light is transmitted. the letters represents six different angles. describe two places where refraction takes place.

A compound is 53.31 % C, 11.18 % H, and 35.51 % O by mass. What is its empirical formula? Insert subscripts as needed.

Which best explains why there is wind in Earth's atmosphere

A solution of ammonia and water contains 2.60*1025 water molecules and 6.90*1024 ammonia molecules. how many total hydrogen atoms are in this solution

Which of the following questions can be answered by science? A. Is fruit ripening dependent on the type of light the fruit is exposed to? B. Is it justifiable to add chemicals to the atmosphere to stimulate rain? C.

Consider the reaction: Al2S3 + 6 HCl → 2 AlCl3 + 3 H2S The reaction has a 29.1% yield. How many grams of Al2S3 are needed to react with 30.0 moles of HCl? a) The molar mass of Al2S3 is 150.16 grams/mole. b) The molar mass of HCl is 36.46 grams/mole.

Why is Earth's temperature just right for life? A. Earth's core is hot enough to heat Earth's surface. B. Earth's magnetic field creates suitable temperatures on Earth's surface. C. Earth's crust is warmed by heat from the sun. D.

Which of the following is an example of a chernical change? Boiling water Burning paper Dissolving sugar in water Melting gold

Part a by drawing molecular orbital diagrams for b2, c2, n2, o2, and f2, predict which of these homonuclear diatomic molecules are magnetic.

A student states that non-metal atoms share their core electrons when they form covalent bonds. What is wrong with this statement? A. Atoms do not share electrons during covalent bonding. B.