1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
jek_recluse [69]
3 years ago
12

Is gold a compound or an element

Chemistry
1 answer:
timurjin [86]3 years ago
3 0
Gold is an element (Au) you can identify it on a periodic table
You might be interested in
A horizontal pipe 15 cm in diameter and 4 m long is buried in the earth at a depth of 20 cm. The pipe-wall temperature is 75 deg
Basile [38]

Explanation:

The given data for case (1) is as follows.

  h = 20 cm = 0.2 m

Assuming that a rectangular slab is placed above the pipe and we will calculate the heat transfer as follows.

              Q = kA \frac{\Delta T}{L}

  where,    A = area

                  L = length

                  k = thermal conductivity = 0.8 W/m

             \Delta T = change in temperature.

Therefore, putting the given values into the above formula as follows.

            Q = kA \frac{\Delta T}{L}

                = 0.8 W/m \times (4 m \times 0.15 m) \frac{75 - 5}{0.2}

                = 168 W

For case (2), h = 180 cm = 1.8 m

Therefore, heat lost will be calculated as follows.

                       Q = kA \frac{\Delta T}{L}

                           = 0.8 W/m \times (4 m \times 0.15 m) \frac{75 - 5}{1.8}

                           = 18.67 W

Thus, we can conclude that 18.67 W heat lost if the pipe was buried at a depth of 180 cm.

8 0
3 years ago
Which part of the wave does the arrow point to?
AlekseyPX
I think it’s gonna be D
7 0
3 years ago
The following two compounds are constitutional isomers. Identify which of these is expected to be more acidic, and explain your
Vladimir [108]

Answer:

c. Compound 2 is more acidic because its conjugate base is more resonance stabilized

Explanation:

You haven't told us what the compounds are, so let's assume that the formula of Compound 1 is HCOCH₂OH and that of Compound 2 is CH₃COOH.

The conjugate base of 2 is CH₃COO⁻. It has two important resonance contributors, and the negative charge is evenly distributed between the two oxygen atoms.

CH₃COOH + H₂O ⇌ CH₃COO⁻ + H₃O⁺

The stabilization of the conjugate base pulls the position of equilibrium to the right, so the compound is more acidic than 1.

6 0
3 years ago
The type of neuron that carries impulses from the brain are...​
jek_recluse [69]
It’s Sensory Neurons!
5 0
3 years ago
Can someone please help a girl out and answer this plsss ...need this as soon as posible
Helga [31]

Answer:

the anwser would be B obtain energy

Explanation:

7 0
3 years ago
Other questions:
  • A newton is used to measure force.<br><br> True or False?
    14·1 answer
  • Alice added sodium chloride to water and stirred the water for several minutes. Alice is most likely trying to demonstrate that
    14·1 answer
  • When a kettle is placed on the stove and water begins to boil, the hotter water at the bottom begins to rise and the cooler wate
    12·2 answers
  • When a andle burns both physical change and chemical change take place how
    12·1 answer
  • the atom was thought to be indivisible. Explain the significance of Thomson's concept of the electron.
    9·1 answer
  • 3. In the formation of acid rain, sulfur dioxide reacts with oxygen and water in the air to form sulfuric acid. Write a balanced
    12·1 answer
  • ILL GIVE BRIANLIST
    10·2 answers
  • What type of compound is formed by the transfer of electrons from one atom to another?
    13·1 answer
  • A forklift applies a force of 2,000 N to raise a box 3 m.
    6·1 answer
  • As the temperature of a gas increases, explain what happens to its density and why.
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!