I need this question ASAP please

Answers

Answer 1

Answer:

Heeeeeeeeeeeeeloooooooooo

Explanation:


Related Questions

How many grams is 2.40 x 1023 molecules of N,O,? (5 pts)
PLS HELP ASAP

Answers

Answer:

30.26 grams of N₂O₃

Explanation:

Divide by Avogadro's number. This leaves you with the number of moles. Then, multiply by the molar mass of N₂O₃

Why should we try to use less oil, natural gas and electricity?

Answers

Because they aren’t sustainable and they contribute to global warming, I think.
When using oil, natural gas, and electricity, and uses natural resources. Many mass production companies in factories use a lot of oil, natural gas, and electricity and it contributes to global warming negatively.

How many molecules of As4010 are in 6.2 mol of As4010?

Answers

9.30 sorry if I wong

4 Weathering Assessment
2 of 132 of 13 Items


Question
POSSIBLE POINTS: 5.88
On a hot summer day, you and your friend decide to make a drink by mixing ice cubes, water, sugar, and Kool-Aid mix. Which of the following statements best describes what type of change has occurred?

This is an example of chemical change because the sugar dissolved.
This is an example of chemical change because the sugar dissolved.

This is an example of a physical change because the sugar dissolved
This is an example of a physical change because the sugar dissolved

This is an example of a physical change because the ice cubes began to melt.
This is an example of a physical change because the ice cubes began to melt.

This is an example of a chemical change because the Kool-aid dissolved and turned the water red.

Answers

Answer:

This is an example of chemical change because the Kool aid dissolved and turned the water red

In H20 does the 2 apply to
Hydrogen, Oxygen, or Both?

Answers

Answer:

The difference is due to the fact that one water molecule has two hydrogen atoms to one oxygen atom, as explained above. This means it takes two water molecules (2 H2O) to make one oxygen molecule (O2)

Explanation:

Answer:

In H20 does the 2 apply to Hydrogen

Explanation:

In H₂O there is two atoms of hydrogen and 1 atom of Oxygen

Hence, In H20 does the 2 apply to Hydrogen

-TheUnknownScientist

How many grams in 4.5 moles of H2O?

Answers

the are 18.01528 grams

.....

Nitrogen oxide is a gas that is injected into potatoes chip bags right before they are sealed. How
many moles of nitrogen oxide are in a bag at 760 mmHg, 273 K, and has a volume of 1.0 liter?
(2 sig figs)

Answers

Explanation:

[tex]pressure = 760mm \: of \: mercury \\ = 101325 \: pascals \\ from \: PV = nRT \\ 101325 \times 1 = n \times 8.314 \times 273 \\ n = 44.6 \: moles[/tex]

Answer:

740

Explanation:

The nitrogen is combined with it.

4.What type of energy is used to fuel the process of photosynthesis and what type is produced in
respiration?
A Light energy is used in photosynthesis and created by respiration.
B ATP is used in photosynthesis, which allows the plant to undergo respiration.
C Light energy is used in photosynthesis, whereas respiration creates the energetic product, ATP.
D Food energy is used in photosynthesis and ATP is produced in respiration.

Answers

Answer:

A. light energy is used in photosynthesis and created by respiration

2NaCl ---> 2Na + Cl2
What are the atoms of the products ​

Answers

Answer: ...

Explanation:

Sodium, chlorine

Answer:

2Na = 2 Sodium [has 2 atoms]

Cl2 = Dichlorine (Chlorine) [has 2 atoms]

Is this what you wanted?? I'm not entirely sure if this is the answer you were looking for.

Identify the acid, base, and salt in the following reaction

HNO3 + KOH —> H2O + KNO3

Answers

Explanation:

acid ,HNO3

base,KOH

salt ,KNO3

3. Determine the pH of each of the following solutions. (Hint: See Sample Problem B.) a. 1.0 x 10-2 M HCI c. 1.0 x 10-MHI b. 1.0 x 10-3 M HNO3 d. 1.0 x 10-M HB​

Answers

Answer:

a. pH = 2 b. pH = 3 c. pH = 1 d. Unanswerable

Explanation:

pH = -log[H+] OR pH = -log{H3O+]

                    and inversely

pOH = -log[OH-]

1. Determine what substance you are working with, (acid/base)

2. Determine whether or not that acid or base is strong or weak.

a. 1.0 x 10^-2M HCl

HCl is a strong acid, therefore it will dissociate completely into H+ and Cl- with all ions going to the H+, therefore, the concentration of HCl and concentration of H+ are going to be equal, meaning we simply take the negative logarithm of the concentration of HCl and that would equal pH

pH = -log[H+]

pH = -log(1.0x10^-2)

pH = 2

b. 1.0 x 10^-3M HNO3

HNO3 like part a, is a strong acid, therefore it would simply require you to take the negative logarithm of the concentration of the compound itself, to find its pH.

pH = -log[H+]

pH = -log(1.0 x 10^-3)

pH = 3

c. 1.0 x 10^-1M HI

Like the previous parts, HI is a strong acid

pH = -log[H+]

pH = -log(0.10)

pH = 1

d. HB isn't an element, nor is it a compound so that would be unanswerable.

How many grams in 4.50 moles of NaNO3?

Answers

Answer:

382.5 grams

Explanation:

Find the molar mass of NaNO₃ and then multiply the number of moles by that molar mass :)

plz help me 14 points

Answers

Meiosis is important because it ensures that all organisms produced via sexual reproduction contain the correct number of chromosomes. Meiosis also produces genetic variation by way of the process of recombination.

Need Help!!

Explain the relationship between volume and temperature (Charles’ Law)

Answers

Answer:

the volume of a give gas simple is directly propotional assolute temperature at constant pressure .the volume of a gavi. amount of gass is inversely propotional ot Its pressure when temperature is help constant

Anatom of an element has no electron,will that atom have any mass or not? Can antom exist
without electron? if so give an example.​

Answers

Answer:

Generally, all atoms of elements contain three sub-atomic particles- Protons(Positively-charged), Neutrons(Neutral) and Electrons(Negatively-charged).

The Magnitude of the Positive Charge possessed by the Protons and the Magnitude of the Negative Charge possessed by the Electrons cancel each other, which make the atom electrically neutral.

Hence,

Without any electrons, the magnitude of the positive and negative charges wouldn't balance, and the atom would be unstable and disintegrate almost immediately. Hence, all stable atoms should have electrons revolving around them, where the number of protons and electrons are the same, under normal conditions.

To Conclude,

Every atom of an element will have electrons arranged in different shells, or matter couldn't exist without electrons.

The amount of energy transferred per unit time by an electrical appliance is measured in what? Give the
name not the symbol.

Answers

Answer:

The Watt

Explanation:

Electric power is the rate, per unit time, at which electrical energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per second.

The amount of energy transferred per unit time is called power, and power is measured in Watt.

What is Watt?

Watt is the unit of power. It is used to measure the transfer of power. This is named after James Watt.

When one joule of energy is transferred in one second, this is the power of the Watt.

Thus, the amount of energy transferred per unit time is called power, and power is measured in Watt.

Learn more about Watt

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4. Ionic compounds conduct electricity when they are in the __ state


Answers

Answer:

Salts do not conduct electricity at the solid state since the ions are in a fixed position in the lattice. However, at the molten state or in solution, the ions are free and they can move within the liquid phase to serve as electrons shuttles and therefore, they become conductive.

Explanation:

Pls help really need it pls

Answers

the correct answer is the first one i think

One major problem with wind and solar energy is that they are conditional. Explain how hydroelectric pumped storage could be used to eliminate this
obstacle? *​
Link to the article https://thinkprogress.org/the-inside story-of-the-worlds-biggest-battery-and-the-future-of-renewable-energy-8984c81283c/

Answers

Answer:

Hydroelectric pumped storage can be used to eliminate the conditional nature of wind and solar energy. At times of peak production of energy from either solar or wind (during summer and windy days), the excess electrical energy produced can be stored using hydroelectric pumped storage methods. When conditions no longer favour energy production from either wind or solar sources, these stored energy can then be regenerated for use.

Explanation:

Pumped-storage hydroelectricity is a type of hydroelectric energy storage used by electric power systems to store excess electrical power during periods of low demand for later release at periods when demand for energy rises again. It stores energy in the form of gravitational potential energy of water, pumped from a lower level reservoir to a higher level reservoir.

At times of low electrical demand, excess generated energy is used to pump water into the upper reservoir. When there is higher demand, water is released back into the lower reservoir through a turbine, generating electricity.

This form of energy storage is useful in circumventing the conditional nature of renewable energy sources such as wind and solar energy. At times of peak production of energy from either solar or wind (during summer and windy days), the excess electrical energy produced can be stored using hydroelectric pumped storage methods. When conditions no longer favour energy production from either wind or solar sources, these stored energy can then be regenerated for use.

BRAINLIESTTTT
If a solution has pOH of 5.2 the pH of the solution is?
A. 0.17
B. 5.2
C. 6x10-6
D. 8.8

Answers

Answer:

D 8.8

Explanation:

To solve this question you must know that, using the kw equation:

Kw = 1x10⁻¹⁴ = [H⁺] [OH⁻]

-log 1x10⁻¹⁴ = -log ([H⁺] [OH⁻])

14= -log [H⁺] + -log [OH⁻]

As pH = -log[H⁺] and pOH = -log [OH⁻]

we can obtain the equation:

pH = 14 - pOH

As the pOH of the solution is 5.2:

pH = 14 - 5.2

pH = 8.8

Right option is:

D 8.8

Where do we get our energy from ?

Answers

Answer:

energy

Explanation:

from food which we eat

how many grams of AgNO3 (MM=169.87) are needed to prepare 0.125 M solution in 250 mL of water?
a. 0.5 g
b. .03 g
c. 5.3 g
d. 84.9g​

Answers

Answer:

Correct answer-C 5.3g

Explanation:

Molarity = no. of moles of solute/ volume of of solution in litre

olarity = no. of moles of solute/ volume of of solution in litreno of moles of solute = 0.125×0.25=0.03125

olarity = no. of moles of solute/ volume of of solution in litreno of moles of solute = 0.125×0.25=0.03125one mole AgNO3 weighs 169.87 gm,

olarity = no. of moles of solute/ volume of of solution in litreno of moles of solute = 0.125×0.25=0.03125one mole AgNO3 weighs 169.87 gm,so the mass of 0.03125 moles of AgNO3 = 0.03125×169.87= 5.3084g

The grams of AgNO₃ are needed to prepare 0.125 M solution in 250 mL of water is 5.3 grams.

How do we calculate mass from moles?

Moles is a unit which is used to define any amount and it is calculated as:

n = W/M, where

W = required mass

M = molar mass

Given molarity of AgNO₃ = 0.125 M

Volume of water = 250mL = 0.25L

moles (n) from the molarity (M) will be calculated as:

n = M × V

n = (0.125)(0.25) = 0.0312 moles

Now we calculate the mass of AgNO₃ by using the above formula as:

W = (0.0312mol)(169.87g/mol)

W = 5.30 g

Hence option (c) is correct.

To know more about moles, visit the below link:

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A compound is composed of 53.33%carbon, 11.11%hydrogen and 35.56%oxygen. If the molecular mass of the compound is 90, what is the molecular formula of this compound?

Answers

The final molecular formula will be C4H10O2
Hope this helps :)

Calculate the number of moles in 3.01 x 10²² atoms of calcium.​

Answers

Answer:

Using dimensional analysis:

3.01x1022 molecules CO2 x 1 mol CO2/6.02x1023 molecules x 44. g CO2/mole = 2.20 g CO2

Explanation:

Help please!!! I'll name you brainliest!!

Answers

The answer is
C
Hope this helps.

Answer: pls mark brainliest

Explanation: i think so its D

A student transfers a gas at STP from a 11.0 L tank to a 25.0 L tank. If the pressure
remains constant, what is the new temperature?

Answers

. Consider a sample of oxygen gas at 27° C with a volume of 9.55L at a pressure

Answer:620 k

Explanation:

Particle motion in ice is _________
than particle motion in water.

Answers

Answer:

slower(less faster)

the particles motion in a liquid state of a substance is faster than the particle motion in substance's solid state.

Particle motion in ice is slower than particle motion in water.

What is the motion of particles?

The motion of particles is the random movement of the particles or electrons inside the atoms. These movements happen due to an increase in temperature or heat.

There are three types of matter, solid, gas, and liquid. These matters have different particle movements. Because these matters have different organizations of charged particles within them.

As ice is solid, the particles in solid have compact particle present. These particles are near to each other and do not move. And water is liquid, its particles move randomly. As liquid move and get the shape of the container. Its particles are in motion.

Thus, particle motion in ice is slower than particle motion in water.

To learn more about the motion of particles, refer to the link:

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Which of the following relationships can be measured in light years?
the length of time it takes light to reflect from a plane mirror
the amount of light absorbed by the Earth
the index of refraction of a mirage
the distance between stars and galaxies
All of the choices are correct.

Answers

All of the choices are correct

What occurs when solid A, at 50.0°C, is place in liquid B, at 80.0°C?
A Heat energy flows from A to B as the average kinetic energy of the particles in A decreases
B Heat energy flows from A to B as the average kinetic energy of the particles in A increases
CHeat energy flows from B to A as the average kinetic energy of the particles in B decreases
D Heat energy flows from B to A as the average kinetic energy of the particles in B increases

Answers

B I do believe I could be wrong

How can I express the composition of a solution?

Answers

Answer:

It can be expressed in several ways: molarity (moles of solute per liter of solution); mole fraction, the ratio of the number of moles of solute to the total number of moles of substances present; mass percentage, the ratio of the mass of the solute to the mass of the solution times 100; parts per thousand (ppt), grams ...

Explanation:

It can be expressed in several ways: molarity (moles of solute per liter of solution); mole fraction, the ratio of the number of moles of solute to the total number of moles of substances present; mass percentage, the ratio of the mass of the solute to the mass of the solution times 100; parts per thousand (ppt), grams ...

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