Which of the following is an example of a synthesis reaction?

A. H2 + Br2 → 2HBO

B. NaCl → Nat + CI

C. 2H20 + 2Na → 2NaOH + H2

D. Mg + H2SO4-→ MgSO4 + H2

How does the speed of visible light compare with the speed of gamma rays, when both speeds are measured in a vacuum? A. The speed of visible light is greater B. Speed of gamma rays is greater C. Speeds are the same D.

The gas inside a balloon is characterized by the following measurements: pressure = 725.5 mmHg; volume = 400.0 mL; temperature = 16.5 C

Which of the following is not a statement of Dalton's atomic theory of matter? a. Elements are made of atomsb. Atoms of a given element are identicalc. The atoms of one element can be identical to the atoms of another elementd.

What occurs when atoms link together in new ways to create a substance diffrent from the original substance? A. a physical change B. a chemical change C. a nuclear reaction D. an inversion

Francisco wrote these notes on one of the scientists who contributed to cell theory: 1838 Studied plants Used a microscope Concluded that plants are made of cells Who are these notes about?

Describe the weather associated with a high presurre system

Which of the following is equal to distance/time?

Which of the following should you always wear to avoid being thrown from a vehicle and then crushed if it tips over?

If the titrant has a molarity of 0.1000 m and there are 45.00 ml of analyte present, what is the molarity of the analyte?

How is the hardness range for a mineral determined?