In what group and period element with atomic number 13 belongs

Remember to use the proper number of significant figures and leading zeros in all calculations. gelatin has a density of 1.27 g/cm³. if you have a blob of gelatin dessert that fills a 2.0 liter bottle, what is its mass? 2540 g2500 g3.9 x 10-43.937x 10-4

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation: