An unknown substance weighing 42.0g was heated from 36.0°C to 65.0°C. In this process, the substance absorbed 5895 J of energy. What is the specific heat of the substance?

Balance the following equation: (3pts) Al + HBr - -> AlBr3 + H2

Explain the importance of carbon's ability to form covalent bonds in straight chains, branched chains, or rings. As much detail as possible.

One important difference between covalent and ionic bonds is that a. in covalent bonds two atoms share electrons, whereas in ionic bonds one atom gives one or more electrons to the other atom. b.

The mass of a single iron atom is 9.28*10-23 grams. How many iron atoms would there be in 91.5 milligrams of iron?

Have an infinite number of significant figures

What does it mean for data to be continuous?

When an acid reacts with a base what compounds are formed? a. a salt only. b. water only. c. a salt and water. d. metal oxides only.?

What is the differences between River system, Tributary?

having that coloration is selected for since many predators will recognize it and stay away. Therefore the common coloration is beneficial to the butterflies and becomes more common. What type of selection is involved?

What organisms appeared on Earth First? a). gastropods b). horn corals c). brachiopods d). crinoids