The astronaut then measures the abundance of magnesium on the new planet, obtaining the following results:

Isotope Abundance

(%) Mass

(amu)

24Mg 78.99 23.99

25Mg

10.00 24.99

26Mg 11.01 25.98

What is the atomic mass of magnesium for this planet?

John Dalton believed which of the following about atoms? Atoms are real even though they're invisible. All atoms of a single substance are identical. The atom could be divided into smaller parts. Atoms of different substances differ by weight.

Explain mitosis and meiosis in your own words.

The physical state of the substances of wood

More electrons move into your body when you walk across a carpeted floor than when you walk across a smooth floor. What is the most likely explanation for this?

How does the vapor pressure of water at 10 c compare with its vapor pressure at 50 c?

Which headings best complete the chart? Walt made a study chart listing uses for two types of electromagnetic waves.

Identifying How to Stay Safe during a Tornado Use the drop-down menus to complete each statement about tornado safety.

How does erucamide make substances scratch resistant?

A certain gas occupies a volume of 26 L when the applied pressure is 5.7 atm. Find the pressure in the system when the gas is compressed to a volume of 6.5 L at constant temperature.

What type of reactions is: C7H16 + O2 - -> CO2 + H20