Why are metallic and ionic substances harder to melt than covalent substances

The formation of covalent chemical bonds is a. thermoneutral. b. exothermic. c. endothermic. d. slow

Specific heat of water is 4.18 J/g°C. How many Joules are needed to warm 10 grams of water from 10 to 25 degrees Celsius?

For a star of sun-like mass, what is the last stage of the nuclear fusion? a. hydrogen to helium b. helium to carbon and oxygen c. fusion goes all the way up to iron. d. carbon to magnesium

How doni balance a equation correctly?

1.2 L of gas at a temperature of 25°C are held at a pressure of 1.1 atm. How many moles of gas are contained in the sample?

Do I need to include the way I did the chemical experiment on my chemistry lab report for my chemistry BSC?

Mention 6 products from coal tar as a result of destructive distillation of coal

Reaction E0 Zn → 2e - + Zn2 + 0.76 2F - → 2e - + F2 - 2.87 F2 + Zn → ZnF2 Will this redox reaction take place? yes no

An iodine ion contains 53 protons, 52 neutrons, and 54 electrons. what is the net charge of the ion?

What is the final product of the following sequence of reactions? A. A B. B C. C D. D 21. Which of the following reacts the fastest with NaOH, H2O? A. ethylene oxide (oxirane) B. cis-2,3-dimethyloxirane C. trans-2,3-dimethyloxirane D.