Is mass conserved when 200 g of water undergoes a physical change? Use complete sentences to support your answer by explaining how this can be demonstrated.

In comparing 1 mole of carbon atoms to one mole of magnesium atoms, which statement is TRUE? a. The mass of 1 mole of magnesium is greater than the mass of 1 mole of carbon. b. There are more atoms in 1 mole of magnesium than in 1 mole of carbon. c.

All of the chromosomes line up along the middle of the cell during

A container with 0.317 L of water is placed into microwave and is then radiated with electromagnetic energy that has a wavelength of 13.3 cm. The temperature of the water then rose by 74.3 °C.

How many valence electrons does hydrogen need to have a full first shell?

The mole fraction of A (XA) in the vapor phase of a mixture of two liquids is 0.24 and the sum of the partial pressures is 740 torr.

Describe how jj thomson used the cathode ray tube to discover and evaluate the electron.

Type of ion formed by group 2A elements

When comparing the two elements P and I, the element with the higher first ionization energy is PP When comparing the two elements P and I, the element with the higher first ionization energy is blank based on periodic trends alone.

Internal respiration is the transfer of oxygen and carbon dioxide from the lungs to the tissue cells of the body. True or False

Which element is a metalloid? 1. Al 2. Ar 3. As 4. Aa