How many times stronger was the earth's magnetic field in 800 B. C.?

a. 1.5 times

b. 2 times

c. 3 times

d. 4 times

What element has the electron configuration 1s22s22p63s23p2?

If there is more friction what happens to a moving part

A mixture of 50.0ml of ammonia gas and 60.0ml of oxygen gas reacts. If all the gases are at the same temperature and pressure, and the reaction continues till one of the gases is completely consumed.

Round to 4 significant figures: 42,561

How many grams of Mg are needed to react completely with 3.80 L of a 2.50 M HF solution?

How does bohrs model agree with Thomson model

How does the acid level in a lake affect how many fish live there?

The table below shows four samples of carbon dioxide and the temperature of the water that they were dissolved in. sampletemperature of water (°c) 178273355463which of the samples most likely had the lowest solubility?

Using the periodic table, which of the following can be predicted for an atom of chlorine? It has 35.45 protons It has 17 protons It has 35.45 neutrons It has 17 neutrons

Which of these represents a chemical change?