A 32.1 g iron rod, initially at 21.5 °C, is submerged into an unknown mass of water at 63.5 °C, in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 58.5 °C. Express your answer to two significant figures and include the appropriate units. m = Submit μA Value Units ]] ? Previous Answers Request Answer

The mystery fuel speedster! (Homework ) For fun, you build an explosive car with your little brother by attaching wheels to an empty windshield washer container. To advance it, you add 1.20 ml (  = 0.7915 g/ml) of a liquid but volatile fuel into the container. You close the cap and shake to evaporate the liquid. Finally, you place the car on its wheels, remove the cap and insert a burning wooden rod into the container. A flame suddenly comes out of the car, which is propelled with good speed in front of your little brother surprised, but all upset by the maneuver.   The volatile fuel is composed of 37.5% carbon, 12.6% hydrogen and 49.9% oxygen. Its molar mass is approximately 32.0 g/mol.   During the reaction, the fuel (gaseous) burns in the presence of gaseous oxygen, and the products of the reaction are carbon dioxide and water, gaseous too. The volume of the windshield washer container used is 4.00 litres. Useful Info: There is 21.0% gaseous oxygen in the air and initial conditions…

If a water sample has 0.07 mol of calcium ions in 15 L solution, what is the water hardness level in mg/L? Pay attention to the unit. Hint: For the calcium mass , convert mol to g to mg. (1 mol calcium ion= 40.08 g/mol and 1 g = 1000 mg) Round and report your answer to an integer without decimal place. Report numeric value only, no unit. • Water hardness levels according to EPA Soft: 0-60 milligrams per liter (mg/L) as calcium carbonate Moderately hard: 61-120 mg/L as calcium carbonate • Hard: 121-180 mg/L as calcium carbonate Very hard: more than 180 mg/L as calcium carbonate

Discuss the language demands included in the lesson on mixing substances in a 5th-grade classroom by Identifying key vocabulary terms students must know in order to master the learning objectives for the lesson based on the below standard and learning objective. Standard Conduct an investigation to determine whether the mixing of two or more substances results in new substances. Learning Objective Given a variety of substances and safety equipment in a classroom setting, students will be able to conduct an experiment to mix two or more substances and observe the results. They will be able to correctly identify whether a new substance has been formed as a result of the mixing, based on observable changes such as color change, formation of a precipitate, or change in temperature, with at least 80% accuracy.

I wish i could visit a tutor during these times.  May I please get a break down for number 12. I'm stuck on this question

Topic: GRANULES ( I ALREADY ANSWER IT BUT I AM NOT SURE WITH MY ANSWERS, I NEED AN EXPERT TO DOUBLE CHECK MY WORK THANK YOU!!!!) 1. Granules are easier to compress than powders. II. Granules occupies greater volume per unit weight than powders. A. If both statements are TRUE B. If the FIRST statement is only TRUE C. If both statements are FALSE D. If the FIRST statement is only FALSE (MY ANSWER IS A)) 2. Granules prevent the aggregation of powders. II. Moisture and heat labile reagents are preferred in granulated preparations. A. If both statements are TRUE B. If the FIRST statement is only TRUE C. If both statements are FALSE D. If the FIRST statement is only FALSE (MY ANSWER IS C) 3. Wet granulation requires the use of 2 points roller compactors. II. Wet granulation is a prerequisite to avoid the damage of active components in the powder. A. If both statements are TRUE B. If the FIRST statement is only TRUE C. If both statements are FALSE D. If the FIRST statement is only FALSE…

Part D: Food Calories Naked Juice Serving size 240 mL D1. Name of food product D2. Mass of food nutrients in one serving Fat Carbohydrate 33 g, Protein g, D3. Calculations for Calories (Cal) or kilocalories (kcal) per serving kcal (Cal) Carbohydrate Protein kcal (Cal) Fat kcal (Cal) D4. Total Calories (Cal or kcal) per serving kcal (Cal) D5. Calories (for one serving) listed on the label cal (Cal) D6. Percentage of total Calories from carbohydrate % (show calculations) D7. Percentage of total Calories from protein (show calculations) % D8. Percentage of total Calories from fat (show calculations) % Q 4. How does your calculated number of Calories in one serving compare to the Calories listed on the food product nutrition label? Comment on it.

What is the Mass of solvent in grams? Add together the masses of the liquid water and ice added to the calorimeter. Convert the volume of liquid water to mass using 1.000 g/mL as the density of water (see procedure for volume used). Side note:Molarity of the solution is  0.76612903225806

What is the answer to the first question?

Chemistry  ...