SCIENCE!

Kaila was organizing data about the rise in popularity of computers and internet usage
in the US. She made a table with the percentages of home with computers and internet access. Which of the following is NOT a reason that home computer and internet usage have increased?


A.more options for computer technologies
B.better offsite storage facility and server farms
C.home computers contain better technology and can be cheaper
D.better reliability of data transmissions

The number of moles of nitrogen atoms are there in 1.64 x 1023 molecules of dinitrogen trichloride is 0.544.

The mole is a SI unit of measurement that is used to calculate the quantity of any substance.

1 mole is 6.022 × 10²³

[tex]1\; molecule = \dfrac{1}{6.023 \times 10^2^3}[/tex]

The given number of moles are 1.64 x 10²³

[tex]1.64 \times 10^2^3= \dfrac{1}{6.023 \times 10^2^3} = 0.272 \\[/tex]

Now, there are two molecules of nitrogen in the dinitrogen trichloride

So, 0.272 x 2 = 0.544

Thus, the number of moles of nitrogen atoms are there in 1.64 x 1023 molecules of dinitrogen trichloride is 0.544.

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Answer:

90 degree is the boiling point of c

Answer:

339 grams Rb

Explanation:

To find the final answer, you need to (1) convert atoms to moles (via Avogadro's number) and then (2) convert moles to grams (via molar mass from periodic table).

Molar Mass (Rb) = 85.468 g/mol

2.39 x 10²⁴ atoms Rb                1 mole                       85.468 g
-------------------------------  x  -----------------------------  x  -------------------- = 339 g Rb
                                          6.022 x 10²³  atoms            1 mole

Answer:

The following evidences of plate motion are:

offset of rocks along the San Andres fault.

the age distribution of basalt at mid-ocean ridges.

the age distribution of the Hawaiian Islands

Answer:

A Lunar eclipse

Explanation:

A Lunar eclipse occurs only when the sun,earth and moon are exactly aligned with earth .

This can be viewed twice in calendar years.

It's a Lunar Eclipse.

A lunar eclipse is the blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon. A lunar eclipse occurs when the Moon enters the Earth's shadow. A solar eclipse occurs when the Moon's shadow falls on the Earth. They do not happen every month because the Earth's orbit around the sun is not in the same plane as the Moon's orbit around the Earth.

The change in temperature of 150 grams of water when gains 500 Joules of energy is 0.797 °C

Heat transfer is defined as the process in which the molecules are moved from the region of higher temperature to lower temperature.

The heat transfer can be calculated by the formula

[tex]Q=m \times c \times \Delta T[/tex]

Here, Q is the heat supplied to the system,

m is the mass of the system,

c is the specific heat capacity of the system and

Δ T is the change in temperature of the system.

Substituting the values in the equation

m = 150g

Q=500 Joules

[tex]\rm c_{p}[/tex] = 4.18 J/gxC

500 = 150 * 4.18* Δ T

Δ T = 0.797 °C

Therefore the change in temperature of 150 grams of water when gains 500 Joules of energy is 0.797 °C .

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Answer:

b

Explanation:

b

Answer:

William Stone (American Caver) became interested in caving in High school .

Answer:

numbers

Explanation:

idek im just bored

The Gibbs Free Energy at 298 K, AH = 46 kJ/mol and sº = 0.097 kJ/(K-mol) is 28.906 kJ/mol

It serves as the single master variable that determines whether a given chemical change is thermodynamically possible.

Thus if the free energy of the reactants is greater than that of the products, the entropy of the world will increase when the reaction takes place as written, and so the reaction will tend to take place spontaneously.

Conversely, if the free energy of the products exceeds that of the reactants, then the reaction will not take place in the direction written, but it will tend to proceed in the reverse direction.

At 298 K,

AH = 46 kJ/mol

and sº = 0.097 kJ/(K-mol).

ΔG=ΔH−T⋅ΔS

ΔG = 46 - 298 * 0.097

ΔG = 46 - 28.906

ΔG = 28.906 kJ/mol

The Gibbs Free Energy at 298 K, AH = 46 kJ/mol and sº = 0.097 kJ/(K-mol) is 28.906 kJ/mol

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Answer: A

Explanation: just did it

Answer:

C) 96 g/100 g water

Explanation:

If you look for 80°C in x axis and move up from their until you hit the line for KBr, you will see that you hit the KBr line b/w (90-100 in y-axis) thus the closest answer is  C) 96 g/100 g water

Answer:

1.7

Explanation:

Answer:

The Avogadro number

One mole of atoms contains 6 x 10 23 atoms, no matter what element it is

Explanation:

Answer: According to the molecular orbital theory the shape and size of molecular orbital depends upon- Shape and size of combining atomic orbitals.

Explanation:

Answer:

hi I'm alvin and it's d

Explanation:

brainliest please

Answer:

Use of fertilizers :Increase in population of aquatic animals.

The electron affinity of the 5th group increases down the groups of the periodic table because the electrons are placed in a higher energy level far from the nucleus.

Electron affinity is the energy released when an electron is attached to an atom or molecule.

Electron affinity is used as a measure of its ability to form an anion.

The electron affinity of elements decrease down the group and increase from left to right across the periodic table because the electrons are placed in a higher energy level far from the nucleus.

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Answer:  4 A1+3 02 → 2 Al2O3

Explanation: Two different atoms combines together to produce a compound.

Answer:

c) Fe + CuCl2 → FeCl2 + Cu

Explanation: Synthesis Reaction is when you get same thing on the other side even if its not in the same order after you add the components.

Answer:

b

Explanation:

i beleave the answer is b i read it and it looks like the best option hope it helps

Answer:

mass is always constant for a body.

Explanation:

one way to calculate mass is Mass=Volume ×Density

Answer:

The concentration of Mg3P2 solution = 0.24mol/L

Explanation:

Mass = 81.1g

Volume = 2.5L

Concentration (C) of a solution = [tex]\frac{Moles (n)}{Volume (V)}[/tex]

but moles = [tex]\frac{mass}{Molar mass}[/tex]       and      Molar mass of Mg3P2 = 134.88g/mol

Moles = [tex]\frac{81.1g}{134.88g/mol}[/tex]

          = 0.60mol

hence the concentration can be calculated by;

C =  [tex]\frac{0.60mol}{2.5L} \\[/tex]

  = 0.24mol/L or 0.24M

Food webs are connected to each other and sensitive to any changes.

A food web is the natural interconnection of food chains and a graphical representation of what-eats-what in an ecological community.

From the information given in the passage, we can conclude the following based on the meaning of food webs.

Complete question is below:

Changing one organism in a food web would not have any effect on any other food web.

It is easy to see all the ways that food webs are connected.

Food chains are always separate from each other.

Food webs are connected to each other and sensitive to any changes,

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Answer:

or reactions that are not at equilibrium, we can write a similar expression called the reaction quotient QQQ, which is equal to K_\text cK

c

​

K, start subscript, start text, c, end text, end subscript at equilibrium.

Explanation:

Answer:

b. Run FASTER than normal.

Explanation:

Standard temperature is 273 K or 0°C.

Hence, running the reaction at 60°C, which is higher than normal, would cause the reaction to run faster than normal.