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Gnom [1K]
4 years ago
5

Is the following item durable or nondurable? hamburger

Chemistry
1 answer:
joja [24]4 years ago
3 0
This item is nondurable.
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Cold working of a material... a) Is conducted at room temperature. b) Is conducted inside a refrigerator. c) Is conducted below
Oduvanchick [21]

Answer:

The answer is:

c) Is conducted below the recrystallisation temperature

Explanation:

In cold working the metal goes through a process of plastic deformation that is conducted below its recrystallization point (which its usually at room temperature), this in order to change permanently the makeup of its crystals. The temperature at which the process happens is low enough so that atoms cannot rearrange themselves.

The resulting metal is more resistant to deformation, and has an increased hardness and tensile strength.

5 0
4 years ago
Is water wet? If so explain if not also explain please!
lana66690 [7]

Answer: no

Explanation: Water isn't wet by itself, but it makes other materials wet when it sticks to the surface of them.

6 0
3 years ago
Read 2 more answers
a weather balloon contains 8.80 moles of helium at a ppressure of 0.992 atm and a temperature os 25 C at ground level. What is t
djverab [1.8K]
We can use the ideal gas law equation to find the volume of the balloon.
PV = nRT 
where 
P - pressure - 0.992 atm x 101 325 Pa/atm = 100 514 Pa
V - volume 
n - number of moles - 8.80 mol 
R - universal gas constant  - 8.314 Jmol⁻¹K⁻¹
T - temperature in kelvin - 25 °C + 273 = 298 K
Substituting these values in the equation 
100 514 Pa x V = 8.80 mol x  8.314 Jmol⁻¹K⁻¹ x 298 K
V = 217 L
volume of balloon is 217 L
7 0
3 years ago
What does Nb stand for on the periodic table? Pls help! Need aware soon
Marina86 [1]
It stands for niobium which was discovered in 1801 by Charles Hatchett of Brittan. It is ussed in welding rods, air fraim systems, superconductive magnets. It gets its name from iobe, the daughter of King Tantalus of the Greek myth. Niobium was considered identical to Tantalum, named after Tantalus, until 1884. Resists corrosin due to an oxide film. It is used in aviation industry
4 0
3 years ago
Read 2 more answers
Draw the mechanism for the addition of methylmagnesium bromide to propanoyl chloride (CH3CH2COCl) to give 2-methyl-2-butanol.
Ghella [55]

Answer:

Reaction mechanism has been given below

Explanation:

  • Propanoyl chloride contains an electrophilic carbonyl center to give  nucleophilic acyl substitution reaction by removing Cl group with a strong nucleophile like methylmagnesium bromide.
  • Two equivalent of methyl magnesium bromide react with cabonyl center followed by protonation of negatively charged oxygen atom gives 2-methyl-2-butanol.
  • In the first step, nucleophilic acyl substituion occurs. In the second step, nucleophilic addition occurs. In the third step, protonation occurs.
  • Reaction mechanism has been shown below.

7 0
3 years ago
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