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Anastaziya [24]
3 years ago
13

Why is there gold on the inside of a cell phone but plastic on the outside

Chemistry
2 answers:
Liula [17]3 years ago
4 0

Answer:

Gold is chemically stable and conducts electricity.

Small pockets of gold are used to make mobile phone circuit board.

The plastic is lined to act as antenna gate. It's what makes a phone not a calculator but a communication point, since it allows the data flow, Bluetooth connection, Wi-Fi. Mainly, it allows radio waves to flow.

Goryan [66]3 years ago
3 0

There is gold on the inside of a cell phone because it blocks the distributed  signals and plastic is just there to make sure nothing scratch it.

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The temperature program for a separation starts at a temperature of 50 °C and ramps the temperature up to 270 °C at a rate of 10
Troyanec [42]

Answer:

The correct answer to the question is Option E (Strongly retained analytes will give broad peaks).

Explanation:

The other options are true because:

A. Initial temp = 50 °C

   Final temp =  270 °C

Differences in temp = 270 - 50 = 220°C

Rate =  10 °C/minute.

So, at 10 °C/minute,

total of 220°C /10 °C = number of minutes required to reach the final temp.

220/10 = 22 minutes

B. A column has a minimum and maximum use temperature. Solutes that are already retained would remain stationary while temperatures are low. This would only change if there is an increase in temperature. Heat transfers more energy to the liquid which would make the solute interact with the column phase.

C. Weakly retained solutes may contain larger molecules, will separate by absorbing into the solvent early in separation making the mobile phase separates out into its components on the stationary phase.

D. Retained solute's vapor pressure is higher at higher temperatures making it possible for particle to escape more from the solute when the temperature is high than when it is low.

6 0
4 years ago
HELP ASAP
Vedmedyk [2.9K]

Because they are Isotopes thats why because isotopes have the same atomic number but diffrent mass number


6 0
3 years ago
What process do body cells use to divide
Delvig [45]

Answer:

Most of the time when people refer to “cell division,” they mean mitosis, the process of making new body cells. Meiosis is the type of cell division that creates egg and sperm cells. ... During mitosis, a cell duplicates all of its contents, including its chromosomes, and splits to form two identical daughter cells.

5 0
3 years ago
A substance that contains two or more kinds of atoms is
mote1985 [20]
A substance that contains two or more kinds of atoms is a molecule.
8 0
3 years ago
The combustion of ethane (C2H6)(C2H6) produces carbon dioxide and steam. 2C2H6(g)+7O2(g)⟶4CO2(g)+6H2O(g) 2C2H6(g)+7O2(g)⟶4CO2(g)
Vera_Pavlovna [14]

Answer:

11.9 moles of carbon-dioxide will produced.

Explanation:

Given moles of ethane = 5.95 mol

2C_2H_6(g)+7O_2(g)\rightarrow 4CO_2(g)+6H_2O(g)

According to reaction 2 moles of ethane produces 4 moles of carbon-dioxide.

Then, 5.95 moles of ethane will produce:

\frac{4}{2}\times 5.95 mol=11.9 mol of carbon-dioxide

11.9 moles of carbon-dioxide will produced.

8 0
3 years ago
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