Here is the transcription of the chemical reactions intended for educational purposes. These are unbalanced chemical equations involving hydrocarbons and oxygen, leading to the formation of carbon dioxide and water: 1. \( \_\_\_\_ \, \text{C}_2\text{H}_4 + \_\_\_\_ \, \text{O}_2 \rightarrow \_\_\_\_ \, \text{CO}_2 + \_\_\_\_ \, \text{H}_2\text{O} \) 2. \( \_\_\_\_ \, \text{C}_2\text{H}_8 + \_\_\_\_ \, \text{O}_2 \rightarrow \_\_\_\_ \, \text{CO}_2 + \_\_\_\_ \, \text{H}_2\text{O} \) 3. \( \_\_\_\_ \, \text{C}_2\text{H}_2 + \_\_\_\_ \, \text{O}_2 \rightarrow \_\_\_\_ \, \text{CO}_2 + \_\_\_\_ \, \text{H}_2\text{O} \) 4. \( \_\_\_\_ \, \text{C}_6\text{H}_6 + \_\_\_\_ \, \text{O}_2 \rightarrow \_\_\_\_ \, \text{CO}_2 + \_\_\_\_ \, \text{H}_2\text{O} \) These equations represent combustion reactions of ethene (C₂H₄), ethane (C₂H₈), acetylene (C₂H₂), and benzene (C₆H₆). Students need to balance each equation by adjusting the coefficients.

Consider the process of separating a mixture into its components. The added masses of the recovered components will ______ A.) sometimes B.) always C.) never (question continues below) ...equal 100% of the starting sample mass. Some of the mixture may have been lost during separation, leading to a percent recovery of ______ A.) exactly 100% B.) more than 100% C.) less than 100% ...some mixture components may contain water, leading to a ______ A.) higher B.) lower ....total mass of recovered sample and a percent recovery of_____ A.) more than 100% B.) less than 100% C.) exactly 100%

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When measuring the mass of a sample, which statements are true.   a. Always use a weigh boat or weigh paper.   b. Always return any extra sample to the bottle.   c. Always zero/ tare the balance.   d. Always make sure the balance is clean before and after use.

A residue of potassium chloride will be left in the "container" after the heating is completed. Do you expect it weigh more than, less than or the same as the original potassium chlorate sample? Why?

I am allowed to work with someone I just don’t understand this Using the Volumetric Pipet Data from Part C calculate the

A. Characteristics of Elements, Compounds, and Mixtures 1. Complete the table: Color Luster Element Physical State iron sulfur mercury magnesium

Using mass concentration to fihnd solute mass and solutio.. Calculate the volume in liters of a 2.88 g/dL copper(II) sulfate solution that contains 300. g of copper(II) sulfate (CuSO,). Round your answer to 3 significant digits.

S [Review Topics] a. Merchants usually sell small nuts, washers, and bolts by weight (like jelly beans!) rather than by individually counting the items. Suppose a particular type of washer weighs 0.110 g on the average. What would 78 such washers weigh? g Submit Answer b. Merchants usually sell small nuts, washers, and bolts by weight (like jelly beans!) rather than by individually counting the items. Suppose a particular type of washer weighs 0.110 g on the average. How many washers would there be in 240. g of washers? washers Retry Entire Group Show Hint [References] 9 more group attempts remaining Previous Next> Save and Exit

Determine the formula weight of Al₂(SO4)3. Provide an answer to two decimal places.