Which element could scratch iron?

An increasing number of cirrus clouds indicate which type of weather is likely to happen

Write a balanced equation for the decomposition reaction described, using the smallest possible integer coefficients. When calcium carbonate decomposes, calcium oxide and carbon dioxide are formed.

What do you call the curved, upper surface of water that commonly appears when using a graduated cylinder?. Describe what causes this?.

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).

Which pair below describes isotopes of the same element? A) an atom with 6 protons and 8 neutrons - an atom with 8 protons and 6 neutrons B) an atom with 6 protons and 6 neutrons - an atom with 6 protons and 7 neutrons C) an atom with 8 protons and

How many moles of oxygen are needed to make 6.50 moles of magnesium oxide?

Which of the following happens during a chemical change? Check all of the boxes that apply. One atom or more changes into atoms of another element. New substances with different properties are formed. Solids, liquids, or gases may form.

What material was added to powdered rock during tuttle and bowen's experiments?

Which of the following statements is true? Selected Answer: D. At least two of the above statements (A-C) are true. Answers: A. Ions are formed by adding or removing protons or electrons. B. Scientists believe that solids are mostly open space. C.

Does anybody know which element from the periodic table that has 19 electrons and 24 neutrons, for atomic charge.