answer.
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
AfilCa [17]
2 years ago
10

Which important change in electronic devices, such as televisions and computers, is a result of the use of metalloids as semicon

ductors?
A) Electronic devices have become smaller.
B) Electronic devices are now more brittle.
C) Electronic devices now use more energy.
D) Electronic devices have become more expensive.
Chemistry
2 answers:
nalin [4]2 years ago
8 0

Answer:

option A

Explanation:

correct answer is option A

metalloids are the substances which are not metal and also are not non-metal they have the property of both metals and non-metals.                                                  

metalloids example are silicon, Germanium, Arsenic (As) etc.

Usage of metalloids as semiconductor has  decreases the size of the circuits which leads to the shrink the size of many electronic devices such as TV, mobile etc.

scZoUnD [109]2 years ago
7 0

Answer:

Option (A) Electronic devices have become smaller.

Explanation:

Semiconductor devices are the devices which are based on the properties of the  semiconductor materials like  germanium, silicon, gallium and arsenide. The commonly used materials in electronic devices are the silicon and  germanium because of their low cut off voltages i.e 0.7 v and 0.3 v. Semiconductor materials made the electronic devices smaller as they replaced the Vacuum tubes which was bulky with high operating voltage, high power consumption.

You might be interested in
A sample of hydrogen gas was collected over water at 21ºc and 685 mmhg. the volume of the container was 7.80 l. calculate the m
murzikaleks [220]
To determine the mass of the hydrogen gas that was collected, we calculate for the moles of hydrogen gas from the conditions given. In order to do this, we need an equation which would relate pressure, volume and temperature. For simplicity, we assume the gas is an ideal gas so we use the equation PV = nRT where P is the pressure, V is the volume, n is the number of moles of the gas, T is the temperature and R is the universal gas constant. We calculate as follows:

PV = nRT
n = PV / RT
n = (18.6/760) (7.80) / 0.08205 ( 21 + 273.15)
n = 0.0079 mol

Mass = 0.0079 mol ( 18.02 g / mol ) = 0.1425 g H2
8 0
2 years ago
What volume of water should be used to dissolve 19.6 g of LiF to create a 0.320 M solution?
USPshnik [31]

Answer:

2.4 litters of water are required.

Explanation:

Given data:

Mass of LiF = 19.6 g

Molarity of solution = 0.320 M

Volume of water used = ?

Solution:

Number of moles = mass/molar mass

Number of moles = 19.6 g/ 26 g/mol

Number of moles = 0.75 mol

Volume required:

Molarity = number of moles/ volume in L

Now we will put the values in above given formula.

0.320 M = 0.75 mol /  volume in L

Volume in L = 0.75 mol  /0.320 M

     M = mol/L

Volume in L = 2.4 L

4 0
2 years ago
Which phrase describes the molecular structure and properties of two solid forms of carbon, diamond and graphite?(1) the same mo
vagabundo [1.1K]
I think the answer is (4) different molecular structures and different properties. Both structure are crystal. The structure of graphite is organized in layers. And structure of diamond is a strong network of atoms. Also due to the different structures, they have different properties.
4 0
2 years ago
Carbon monoxide and molecular oxygen react to form carbon dioxide. A 50.0 L reactor at 25.0 oC is charged with 1.00 bar of CO. T
Umnica [9.8K]

Answer:

CO = zero

CO2 =1 bar

O2  = 2.02 bar

Explanation:

We are given

initial pressure of CO = 1bar

total pressure = 3.52 bar

so initial pressure of O2 = 3.52 - 1 = 2.52 bar

the reaction is

2CO + O2 →  2CO2

using the unitary method

2 moles of CO2 → 1 mole of O2

1  bar of CO → \frac{1}{2} * 1= 0.5 bar (required)

but we have more oxygen present , that means CO is the limiting reagent

  • Final pressure of CO will be zero as it is the limiting reagent so it will be consumed completely
  • 1 bar of CO → \frac{2mol CO2}{2mol CO} * 1= 1 bar of CO2
  • 2.52 bar O2 (initially) - 0.5 bar (reacted) = 2.02bar O2
6 0
2 years ago
A gold atom has a radius of 145 pm. If you could string gold atoms like beads on a thread, how many atoms would you need to have
dalvyx [7]
First we have to convert:145 pm = 145 * 10^(-12) m36 cm = 360 mm = 360 * 10^(-3) mn = 360 * 10^(-3) m / 145 * 10^(-12) m = = 360 * 10^(-3) * 10^(12) / 145 = = 2.482758621 * 10^(9) or:2,482,758,621 atoms.

8 0
2 years ago
Other questions:
  • In which of these situations would light slow down?
    14·2 answers
  • A 4.305-g sample of a nonelectrolyte is dissolved in 105 g of water. the solution freezes at -1.23c. calculate the molar mass of
    7·1 answer
  • In the manufacture of steel, pure oxygen is blown through molten iron to remove some of the carbon impurity. if the combustion o
    13·2 answers
  • The formation of large molecules from small repeating units is known as what kind of reaction? Oxidation reduction condensation
    7·1 answer
  • Given that cao(s) + h2o(l) → ca(oh)2(s), δh°rxn = –64.8 kj/mol, how many grams of cao must react in order to liberate 525 kj of
    7·1 answer
  • Uranium-lead (U-Pb) dating of geological samples is one of the oldest and most refined radiometric dating methods, able to deter
    14·1 answer
  • 3. For the reaction: 2X + 3Y 3Z, the combination of 2.00 moles of X with 2.00
    6·1 answer
  • Consider the following reaction at 298.15 K: Co(s)+Fe2+(aq,1.47 M)⟶Co2+(aq,0.33 M)+Fe(s) If the standard reduction potential for
    7·1 answer
  • What is the molarity of a HNO3 solution prepared by adding 290.7 mL of water to 350.0 mL of 12.3 M HNO3?
    8·1 answer
  • There are many important laws and theories in science. Which of the following is a law of science?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!