Answer : The mass of the steel bar is, 35.2 grams.
Explanation :
In this problem we assumed that heat given by the hot body is equal to the heat taken by the cold body.
where,
= specific heat of steel =
= specific heat of water =
= mass of steel rod = ?
= mass of water =
= final temperature of mixture =
= initial temperature of steel =
= initial temperature of water =
Now put all the given values in the above formula, we get
Therefore, the mass of the steel bar is, 35.2 grams.
100mL of the 70% Suspension would be needed for the dilution.
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The concentration and composition of this preparation can be easily modified to accommodate patient requirements when a patient is intolerant to an ingredient in the manufactured products.
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The critical factor is to maintain the high pH of the preparation.
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Answer:
Depends since Chemical equation is not written clearly...
Explanation:
if if the comma represents an equal sign then I would assume that this would be a single replacement... however if this is all one equation I would assume it is a double replacement.
The units for molarity is moles of solute per liter of solution which means if you multiply the molarity of a solution by its volume you get how many moles of solute are in the solution. (0.75Mx0.5L=0.375mol NaCl)
Then you can multiply the moles of sodium chloride (0.375 mol) by its molar mass (58.45 g/mol) to get 21.92g of sodium chloride. That means there is 21.92 grams of sodium chloride in 500mL of 0.75M solution. I hope this helps. Let me know if anything is unclear.
Answer:
1. An apple is something that has matter.
2. Light does not have matter. It neither has mass or takes up and space.
3. Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.
4. A chemical reaction is usually accompanied by easily observed physical effects, such as the emission of heat and light, the formation of a precipitate, the evolution of gas, or a color change. Absolute confirmation of a chemical change can only be validated by chemical analysis of the products!
5. A precipitate is a solid that forms out of solution.
6. In simple terms, the endothermic reactions absorb energy from the surrounding that is in the form of heat. On the other hand, an exothermic reaction releases energy into the surrounding of the system.
Explanation:
Matter is anything that has mass and takes up volume.