Which of the following is a pure substance?

brass

sodium

rocks

steel

A 1.54L gas bulb in a chemistry laboratory contains oxygen gas at 21 degrees C and 758 torr. The air conditioning in the laboratory breaks down (cause ... You know ... It's Morehouse) and the temperature rises to 31 degrees.

Which two terms represent types of chemical formulas

The concentration of a solution can be expressed in (1) kelvins (2) milliliters (3) joules per kilogram (4) moles per liter

Is sunlight replenishable

A 0.800 g sample of cuso4 (s was placed in calorimeter with 43.0g of water at an initial temp of 18.3 degrees celcious. as the cuso (s dissolves in water, the temp increases to 20.2 degrees celcious. what value of / / h can be determined.

Select the correct responses to the questions from the drop-down menus. Which wind blows cool air inland during the day? Which wind blows cool air toward the sea at night? Which winds blow steadily from specific directions and over long distances?

Consider the balanced equation for the following reaction: 3Ca (ClO3) 2 (aq) + 2Li3PO4 (aq) → Ca3 (PO4) 2 (s) + 6LiClO3 (aq) Determine the theoretical yield of LiClO3 (aq) in grams if the percent yield of LiClO3 (aq) is 81.0% and 9.

What is the total number of valence electrons in a sulfide ion in the ground state? (1) 8 (3) 16 (2) 2 (4) 18

Write the name and formula of the compound made of magnesium and fluorine

How was or wasn't the scientific method followed in this experment