Astronomers have observed that the universe is expanding and is accelerating in all directions. using this evidence, astronomers have hypothesized that a huge explosion called the big bang created the universe. which of the following correctly describes the big bang? fact theory opinion none of these a scientific theory is a well-tested explanation for a wide range of observations or experimental results. a hypothesis is a possible answer to a question. when does a hypothesis become a scientific theory? after the hypothesis is first formed by a scientist after a hypothesis is shown to correct in one experiment after the hypothesis has been confirmed through extensive testing after a competing hypothesis has failed nicolas has completed the experimental portion of the lab. which of these should he do while he works on the analysis questions? talk to his friends who are still collecting data keep his safety goggles on keep his gloves on work on another experiment he thought of how do the independent and dependent variables in an experiment compare? they are the exact same as one another. they have no effect on one another. the dependent variable controls the independent variable. the independent variable controls the dependent variable. i need asap plea
Answers: 1
Chemistry, 23.06.2019 09:00, sammypaige08
A0.10 m aqueous solution of sodium sulfate is a better conductor of electricity than a 0.10 m aqueous solution of sodium chloride. which of the following best explains this observation? (a) sodium sulfate is more soluble in water than sodium chloride. (b) sodium sulfate has a higher molar mass than sodium chloride. (c) to prepare a given volume of 0.10 m solution, the mass of sodium sulfate needed is more than twice the mass of sodium chloride needed. (d) more moles of ions are present in a given volume of 0.10 m sodium sulfate than in the same volume of 0.10 m sodium chloride. (e) the degree of dissociation of sodium sulfate in solution is significantly greater than that of sodium chloride.
Answers: 2
Chemistry, 23.06.2019 10:50, broyochey1
Which compound should undergo substitution of the bromine by phenolate anion? draw the structure of the organic product?
Answers: 1
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