Sirius is a blue-white star with a surface temperature of about 9800 K. What is most likely the mass of Sirius? 1.0 solar mass 1.4 solar mass 2.0 solar mass 12 solar mass

Number the elements sodium, magnesium, and potassium in the predicted order of ionic radius from the largest 1 to the smallest 3

1. What is interdisciplinary science? 2. what are some of the ways in which modern science and technology have changed our lives? 3. what are some methods scientist used in making discoveries and developing themes?

Genetically-identical individuals

Which is a characteristic of a decomposition reaction?

Calculate the ph of a solution formed by mixing 250.0 ml of 0.15 m nh4cl with 100.0 ml of 0.20 m nh3. the kb for nh3 is 1.8 x 10-5.

What is the mass number of an atom which is made up of 27 protons, 33 neutrons and 27 electrons?

If you are trying to reduce echoes in a room, what should you add to the room?

The molar mass of iron (Fe) is 55.8 g/mol. what is the mass in grams of 2.25 moles of iron?

Select the compound that is not organic. sucrose carbon dioxide methane urea

You sealed an Erlenmeyer flask that was determined to have a volume of 272.2 mL with a stopper. The density of air at 25°C is 0.001185 g/mL. Air has an effective molar mass of 28.96 g/mol. What amount of air was sealed in the flask?