marissaloomis2003 marissaloomis2003

20-10-2022
Chemistry

Answered

A student heats a 2.8594 gram sample of a mixture that contains an unknown amount of
potassium chlorate (KCIO3) in a test tube in the presence of some MnO₂ catalyst. The KClO3 in
the mixture decomposes during the heating process, releasing its oxygen. After the sample has
cooled the student finds the mass of the sample residue to be 2.1203 grams.
1. How many grams of oxygen atoms were in the KClO3 in the original sample?

Answer :

Other Questions

How many moles of O are in the sample of the unknown compound? Use two decimal places in atomic masses. Only give the numeric value of your answer.

2. In a sample of copper carbonate, how much copper and oxygen would there be for 5 g of carbon? Use the ratio of copper to oxygen to carbon.

At 30oC, how many grams of NaCH3COO will dissolve in 100 grams of water?

A sample of unknown gas weighs 2.45g and occupies 790 mL at 720 mmHg and 95∘C. What is the molar mass? .

If an object has a density of 9.55 g/cm³ and a mass of 75.3 grams, what would its volume be?

Drag each tile to the correct location. What types of mixtures are these? peanuts and almonds mixed food coloring dissolved in water cup of tea and sugar togeth

A chemistry student needs 65.0 g of pentane for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density o

QUESTION 2 Shane hits a ball vertically, giving it an initial speed of 40.3 m s-1. The ball moves directly upwards, and then falls back to Earth. To answer the

An atom of Calcium has 20 protons and 20 electrons. The atom loses 2 electrons. What will be the charge on the ion that forms? A +2 B -2 C +18 D -18

baked” Cheetos are marketed for having a lower fat content and therefore lower caloric content, only 120 Calories per 1-oz serving. If a 0.500-g sample of Baked