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Drupady [299]
3 years ago
9

The chemical hazard label indicates the class of hazard. It uses three major color-coded categories: Health (yellow), Flammabili

ty (red), and Instability (blue).
True or False?
Chemistry
1 answer:
Rasek [7]3 years ago
5 0

Answer:

False.

Explanation:

The chemical hazard label with colors indicates the specific class of hazard. Hazardous Materials Identification System is defined as the numerical hazard rating then incorporate the use of labels with colors.

Blue color: This sign conveys the health hazards of the material, means that long-term exposure to the material can cause the problems, for example kidney damage, and emphysema.

Red for color: This sign conveys the flammability hazards of the material.

Yellow for color: This sign conveys the instability hazards of the material.

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One side of a plane wall is held at 200°C while the other side is exposed to a convective environment having T10°C and h 100 W/m
adelina 88 [10]

Answer:

\frac{\dot Q}{A} = 151.33 W/m^2

T_c = 25.153°C

Explanation:

Given data:

one side wall temperature 200°C

other side wall temperature 10°C

h = 100 W/m^2 °C

k = 2.6W/m °C

wall thickness L = 30 cm

we know that heat flux is given as

\frac{\dot Q}{A} = \frac{ T_A - T\infty}{\frac{L}{K} + \frac{1}{h}}

\frac{\dot Q}{A} = \frac{ 20- 10} {\frac{0.30}{2.6} + \frac{1}{100}}

\frac{\dot Q}{A} = 151.33 W/m^2

1515.33 W/m^2 = \frac{ T_A - T_c}{\frac{L}{K}}

solving for temperature for cold surface is given as

T_c = -1515.33 \times \frac{0.3}{2.6} + 200

T_c = 25.153°C

8 0
3 years ago
Gallium has two naturally occurring isotopes with the following masses and natural abundances: Isotope Mass ( amu ) Abundance (%
ICE Princess25 [194]
The formula for determination of atomic mass given the mass of isotopes and relative abundance is:

Ar = ∑(mass * abundance) / 100
Ar = (68.92558 * 60.108 + 70.92470 * 39.892) / 100
Ar = 69.72306

The atomic mass of gallium is 69.72306 amu
4 0
3 years ago
Why don't noble gasses want to react with anyone?
Zepler [3.9K]
They have a full valence shell (8 electrons in the outer shell) so they are the most stable elements on the periodic table. Therefore, they do not need to react to other elements to gain or lose elections to become stable. 
5 0
2 years ago
What is a characteristic of a lewis base?
statuscvo [17]
A Lewis base is characterized as any species that can donate a lone pair of electrons the Lewis acid (which has a vacant orbital for the lone pair to bond with)

8 0
3 years ago
The book value of a machine, as shown on the balance sheet, is not relevant in a decision concerning the replacement of that mac
KonstantinChe [14]

The book value of a machine, as shown on the balance sheet, is not relevant in a decision concerning the replacement of that machine by another machine: TRUE

<h3>What is the book value?</h3>
  • Book value is the worth of an asset based on its balance sheet account balance in accounting.
  • The value of an asset is determined by subtracting the asset's original cost from any depreciation, amortization, or impairment expenses.
  • Traditionally, a company's book value is equal to its total assets minus intangible assets and liabilities.
  • In practice, however, depending on the source of the computation, book value may include either goodwill or intangible assets, or both.
  • The value inherent in its employees, which is part of a company's intellectual capital, is always overlooked.
  • When intangible assets and goodwill are specifically omitted, the indicator is frequently defined as "tangible book value."

Therefore, the statement "the book value of a machine, as shown on the balance sheet, is not relevant in a decision concerning the replacement of that machine by another machine" is TRUE.

Know more about Book Value here:

brainly.com/question/23057744

#SPJ4

Complete question:

The book value of a machine, as shown on the balance sheet, is not relevant in a decision concerning the replacement of that machine by another machine. (Ignore taxes.) TRUE or FALSE

7 0
1 year ago
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