Which of the following could result from a substance that undergoes a physical change?

a) Its chemical composition is altered.

b) It has an irreversible change.

c) It forms a new substance.

d) Its shape is altered.

The process of gathering knowledge about the natural world

How is lava formed during an volcano

In a chemical reaction 48.6 grams of magnesium reacts with 32.0 grams of oxygen to form magnesium oxide how many grams of magnesium oxide would be produced from this reaction A) 82.6 grams B) 80.6 grams C) 16.6 grams D) 18.6 grams

You perform a combustion analysis on a 255mg sample of a substance that contains only C, H, and O and you find that 561 mg of Co2 is produced along with 306 mg of h20. What is the empirical formula

Which of these molecules experience london dispersion force?

Which of the following statement is not true? A) The sun is involved in producing tides B) There can be two high tides in one location during a single day C) Only the oceans have tides D) If there is a high tide, there will be a low tide

A solution which has a concentration that exceeds its predicted solubility at a certain temperature and pressure would be -

Convert 4.992*1010 g to each of the following units. B. Mg c. mg D. metric tons

The ideal gas law shows us how a gas will behave under many conditions. The formula is: P V = n R T Where P = pressure, V = volume, n = amount of the substance, R = ideal gas constant, and T = temperature.

The Suns ultraviolent Rays can cause skin damage including sunburn and even skin