How is the periodic table organized

Write a hypothesis about what causes aliens to change their shape

When 15 grams of salt dissolve in 45 grams of water, what is the resulting mass of the mixture? The resulting mass would be 60 grams. The resulting mass would be 45 grams. The resulting mass would be 65 grams.

The boiling of water results in a physical change in matter form A. sold it liquid B. gas to solid C. solid to gas D. liquid to gas

Determine the pressure change when a constant volume of gas at 1.00 atm is heated from 20.0 C to 30.0 C

What Type of reaction is this equation C2H5S + O2 - --> CO2 + H2O + SO2

Balance the following chemical equation. Mg + N2 → Mg3N2 A. 3 Mg + N2 → Mg3N2 B. 3 Mg + 2 N2 → Mg3N2 C. 6 Mg + 2 N2 → 3 Mg3N2 D. Mg + N2 → Mg3N2

Which of the following correctly categorizes the following infectious agents? 1. Viruses-living; bacteria-living 2. Viruses-nonliving; bacteria-nonliving (this answer choice is wrong) 3. Bacteria-nonliving; viruses-living 4.

A student wants to compare how easily a metal and a plastic spoon of the same temperature can transfer thermal energy. Which of the following activities should the student perform? Measure the effort required to bend each spoon.

What is the molar mass of a compound?

an element has an isotope with a mass of 203.973 amu and and abundance of 1.40%. another isotope has a mass of 205.9745 amu with an abundance of 24.10%. a third isotope weighs 206.9745 amu and is 22.10%, and the fourth isotope weighs 207.