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coldgirl [10]
4 years ago
6

During a lab investigation Robert was given 5 samples of different metals. Each sample was the same color and had the same volum

e. He was asked to determine which of the 5 samples was copper. Based on Robert’s knowledge of physical properties of matter, describe how he can do this.
Chemistry
1 answer:
Kobotan [32]4 years ago
6 0
He can do this by finding the all the characteristics of copper,
this includes size, density, color,malleable, and see if its a conductor of heat
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a 9.84 ounces ingot of unknown metal is heated from 73.2 degrees fahrenheit - 191.2 degrees fahrenheit this requires 3.912 calor
Gekata [30.6K]

The SI unit of specific heat is J per gram per degree Celsius. Thus it follows that specific heat could be calculated in this way:

Specific Heat = Energy / (mass x change in temperature)

Thus,

Specific Heat = 3.912 cal / (9.84 oz x (191.2 ˚F – 73.2 ˚F))

Specific Heat = 3.369 x 10^-3 cal/oz-˚F

6 0
4 years ago
exothermic reaction in which the reaction releases energy as heat. 4. How would the reaction would change if you added 2 g of st
Margaret [11]

Answer:

Explanation:

We know that the composition of Steel includes Carbon and Iron. So, if 2g of steel wool was added to the iron acetate, then the iron acetate is now being reduced. What will happen is that the solution will be triggered as it becomes denser and get highly concentrated. Hence, an increase in concentration leads to a decrease in reaction rates. Thus, a slow reaction will take place, and the reaction rate will decrease.

6 0
3 years ago
How many moles of NH₃ can be produced from 4.81 moles of nitrogen in the following reaction:
makkiz [27]

Answer:

9.62moles of NH₃

Explanation:

Given parameters:

Number of moles of nitrogen  = 4.81moles

Unknown:

Number of moles of  NH₃ = ?

Solution:

To solve this problem, we need to establish a balanced reaction equation:

            N₂  +  3H₂  →  2NH₃

Now, we can solve the problem by working from the known to the unknown.

          1 mole of N₂ produced 2 moles of NH₃

         4.81moles of N₂ will produce 2 x 4.81  = 9.62moles of NH₃

8 0
4 years ago
P.S. This is a science question not a chemistry.
Vesnalui [34]

Answer:

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3 0
3 years ago
Help me answer this question pls
Anarel [89]
Electrical energy !! i hope this helped :))
5 0
3 years ago
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