Parts of the experiment that are controlled by the scientist are called

A. variables

B. hypotheses

C. controls

D. biologicals

A sample of nitric acid contains both H3O ions and NO3 ions. This sample has a pH value of 1. What is the color of methyl orange after it is added to this sample?

ionic compounds tend to form between metals and nonmetals when electrons are transferred from an element with high ionization energy (metal) to an element with a low electron affinity (nonmetal). a. true b. false

20. The effect of human disturbance on animal populations is stabilizing O density-independent Odensity-dependent O unobservable

Consider the following reaction, which is carried out at 300 K: CH3CH2OH + 3O2 → 2CO2 + 3H2O ∆H = - 1,235 kJ/mol and ∆S = + 0.22kJ/mol•K 1.) What is the value of ∆G? Show your work. 2.) Classify the reaction as spontaneous or nonspontaneous. 3.

The radius of a circle is 7.31. How should the circle area be reported?

Gasohol is a fuel containing ethanol (c2h6o) that burns in oxygen (o2) to give carbon dioxide and water.

Consider a neutral atom with 30 protons and 32 neurons. What is the atomic number of the element?

Find the molarity and molality of 37.0 wt% Hcl. Assume the density of the acid is 1.19g/ml

Which excerpt from "Bone Detective" best shows that Diane France is recognized as an expert in her line of work? But, once again, she was able to produce an amazingly detailed impression.

Blank of water is a physical change because boiling the water is blank from a liquid to a gas