Need Help ASAPPPP!!!!

Need Help ASAPPPP!!!!

Answers

Answer 1

Answer: For number 8. I think only one if not i'm so sorry also you would need 143. 0914

Explanation:

Answer 2

Answer:

Hello! :p

6.022 × 10^{23} atoms of copper. 143.09 g/mol

I hope this helps! Thank you so much! :)


Related Questions

What is the molarity of the nitric acid solution if 20.5 mL of a 0.125 M lithium hydroxide solution are needed to titrate a 25.0 mL sample of the nitric acid solution

Answers

Answer:: We're asked to find the molar concentration of the NaCl solution given some titration data.

Explanation:

How many atoms are AI(OH)3 ?​

Answers

Answer:

It has a total of three elements and seven atoms. Another use that aluminum hydroxide has is it treats the symptoms of too much stomach acid. Some examples of what it treats are: upset stomach, heartburn, and acid indigestion.

Explanation:

Atomicity is the no of atoms present in one molecule. Atomicity of Al(OH)3 = 7.

is a physiologist. Which would most likely be the main focus of her studies?

how atoms bond to form different kinds of matter
how subatomic particles interact and make up atoms
how certain molecules affect the function of the human heart
how the structure of the human brain may differ between humans

Answers

What equipment is generally used to make lyophilized medications suitable for administering to the patient

How do ionic and molecular compounds behave in water?

Answers

Ionic compounds dissolve in water by a process called dissociation. Water molecules separate the cations and ions by means of ion-dipole attractions to form hydrated ions.

Answer:

When ionic compounds dissolve in water they go through a process called dissociation, splitting into the ions that make them up. However, when you place covalent compounds in water, they typically do not dissolve but form a layer on top of the water.

If 0.45 mole oxygen gas occupies a volume of 1.5 L, what volumes will 2.0 moles of oxygen gas occupy at the same temperature and pressure?

please don't send YouT8ube link i need a solution

Answers

Answer:

1. How many moles of oxygen will occupy a volume of 2.5 liters at 1.2 atm and 25° C? PV = V (1.2 n. 0821) (298) = 123 mols 2.

2.0 moles of oxygen gas will occupy a volume of 6.67 L at the same temperature and pressure.

Moles is a unit of measurement used in chemistry to express the amount of a substance. It is a counting unit that represents the number of particles, such as atoms, molecules, or ions, in a given sample.

One mole of a substance is defined as the amount of that substance that contains Avogadro's number of particles, which is approximately 6.022 x 10²³. This number is based on the concept that atoms, molecules, and ions are extremely small and difficult to count individually, so using moles allows for a more practical and convenient representation of quantities.

Given:

Moles of oxygen gas (initial) = 0.45 mol

Volume of oxygen gas (initial) = 1.5 L

Moles of oxygen gas (final) = 2.0 mol

Volume of oxygen gas (final) = ?

Using the principle of molar volume, we can set up the following ratio:

(0.45 mol / 1.5 L) = (2.0 mol / V)

V = (1.5 L × 2.0 mol) / 0.45 mol

V = 6.67 L

Learn more about Moles, here:

https://brainly.com/question/26416088

#SPJ6

How do molecules work?

Answers

A molecule is essentially created by a collection of atoms linked by a network of bonds.

NEED HELP ASAP WILL GIVE BRAINLIEST

Answers

Answer:

First we know that the molar mass of CO2 is 44.01g/mol, and that the sample of CO2 contains 3.408 x 10^21 molecules, and we have to find the mass of that sample.

We know that moles = mass/molar mass, if we rearrange the equation for mass, we'll get:

mass = moles x molar mass

Also, note that the number of atoms/molecules in a sample is the moles of the sample x Avogadro's number (6.02 x 10^23)

If we rearrange the equation for moles, we would get:

moles = molecules of sample/6.02 x 10^23

Plug in the values for the equation above to get the moles:

moles = (3.408 x 10^21)/(6.02 x 10^23)

moles = 0.00566112956 (we're not done yet)

Now that we have the moles and we were already provided the molar mass, we can calculate the mass using the very first equation we rearranged.

mass = moles x molar mass

mass = 0.00566112956 x 44.01

mass = 0.2491g (answered 4 places past the decimal point)

Therefore the sample of Carbon Dioxide has a mass of 0.2491g

Which condition is usually associated with low air pressure systems?

Answers

Answer:

clouds and precipitation that minimize temperature changes throughout the day

Explanation:

AgNO3 is a useful chemical that has many applications and can undergo a variety of reactions. In the following examples, balance each equation if necessary and then identify what type of reaction it represents. i. AgNO3 + Cu —>Cu(NO3)2 + Ag ii. AgNO3 —> Ag +O2 + NO2 iii. AgNO3 + KCI —> AgCI + KNO3 iv. Ag+ +I- +Agl

Answers

The balance chemical equation and the type of reaction of AgNO₃ and the other compounds can be represented as follows;

2AgNO₃ + Cu → Cu(NO₃)₂ + 2Ag (single displacement )

2AgNO₃ → 2Ag + O₂ + 2NO₂ (decomposition reaction)

AgNO₃ + KCI → AgCI + KNO₃(double displacement reaction)

2Ag + I₂ → 2AgI (synthesis reaction)

AgNO₃ + Cu → Cu(NO₃)₂+ Ag

The balance equation is as follows:

2AgNO₃ + Cu → Cu(NO₃)₂ + 2Ag

This is a single displacement (substitution)  reaction. The Copper substance displaced silver from it compound.  

AgNO₃ → Ag + O₂ + NO₂

The balance equation is represented as follows:

2AgNO₃ → 2Ag + O₂ + 2NO₂

The reaction is a decomposition reaction. Silver nitrate was decompose to it individual constituent.

AgNO₃ + KCI → AgCI + KNO₃

The balance equation is represented as follows:

AgNO₃ + KCI → AgCI + KNO₃

The reaction is a double displacement reaction. The  anions and cations of two different compound switch places, forming two entirely different compounds.

Ag + I₂ → AgI

The balance equation is as follows:

2Ag + I₂ → 2AgI

The reaction is a synthesis reaction. The individual elements combined to form a compound.

learn more on chemical equation here:https://brainly.com/question/23453237?referrer=searchResults

Give reason. When the tip of a plant is cut, it does not grow tall.

Answers

Answer: The growth of the plant decides on the presence of plant hormone, auxin which develops in the roots and shoots. Auxins change the rate of elongation in plant cells, controlling how long they become. So, if the tips are removed, there is no auxin made and growth of the plant stops.

The side of a cube is found to be 127.58 mm and its mass is found to be 7.3 kg. Determine the density of this cube in g/mL.

Answers

Answer:

3.5154 g/mL

Explanation:

You will need to use the equation Density = Mass/Volume. You are given mm(can be used to find volume) of a cube and kg(mass). Since your answer is in g and mL we should convert it to those sizes. First we want cm so we will divide the 127.58 mm to cm getting 12.758 cm. We want to cube it since we are finding the whole area of a cube( 12.758*12.758*12.758) which will equal 2076.58 cm^3. We know that 1 mL is equal to 1 cm^3, so we can take our 2076.58 cm^3 and label them as mL(which is what we want). Then we know that there are 1000g in 1 kg, so if we multiply the 7.3 kg, we get 7300g. Finally use the equation Density = Mass/Volume to get your answer. 7300g/2076.58mL = 3.5154 g/mL.

Hope this helps!

What type of material is half-life associated with?

Answers

Answer:

Radioactive material

Explanation:

A team of scientists is conducting tests to measure the boiling point of a liquid using a thermometer in the liquid. The team is
then recording the temperature where the liquid changes from a liquid to a gas rapidly. After 100 trials, the results are 5 degrees
below the expected results. Which next step is most reasonable? (1 point)

O checking the calibration of the thermometer to ensure that it is giving accurate readings
O assuming that the new results are incorrect
O assuming that the previous measurements are incorrect
O checking the insulation of the apparatus to find out if heat is escaping

Answers

The most reasonable step to take will be to check the calibration of the

thermometer to ensure that it is giving accurate readings.

Experiments which are done to be give the same results under standard

conditions. Common causes of incorrect results during the analysis of

boiling point of substances include heating the substance too rapidly or

the thermometer not being properly calibrated.

The thermometer is used to measure the temperature and so must be

properly calibrated to give accurate readings.

Read more on https://brainly.com/question/24657998

OOO OOO
Water's strong hydrogen bonds result in which physical properties? Check all that apply.
high boiling point
low boiling point
high specific heat
low specific heat
density of ice being less than that of liquid water
density of ice being greater than that of liquid water

Answers

Water has a low boiling point and density of ice is less than of liquid water

Explain why the first ionisation energy of beryllium is higher than the first ionisation
energy of lithium.

Answers

Answer:

since the distance between the electron and the nucleus is smaller in B than in Li, the electrostatic nuclear force of attraction experienced by B is higher than the one experienced by Li...this translates to the higher first ionization energy in B than in Li.

Explanation:

i hope it's helping!

describe the atomic models above in terms of

a. location of nucleus
b.location of electrons

Answers

I will pick b. I am not sure yet

Which model represents a compound with a 1:2 ratio?

Please explain your answer.

Answers

Answer:

D

Explanation:

D is the correct answer due to the fact that they way they are connected has 2 purple atoms and 1 orange one. thus would create a 1:2 ratio with 1 orange atom and 2 purple atoms.

A would create a 2:3 ratio, B wouldn't create a ratio comparable to the others, and C creates a 1:1 ratio with a few purple atoms floating around them, making all of the answers except D invalid.

In the given figures, the name of the model representing a compound with a 1:2 is figure D.

What is molar ratio?

Molar ration of any compound gives idea about the ratio of the concentration of given constituents present in that compound.

In the figure A molar ratio is 2:3, in figure B molar ratio of given constituents is not given because each molecule is composed of same types of atoms, in figure C molar ratio of given constitutes particles is 1:1 and in the figure D molar ratio of constituents is 1:2. Because in figure D, two atoms of one element and 1 atom of another element is present.

Hence, figure D is correct option.

To know more about molar ratio, visit the below link:
https://brainly.com/question/4408248

The gas in a 250. mL piston experiences a change in pressure from 1.00 atm to 2.25 atm. What is the new volume (in mL) assuming the moles of gas and temperature are held constant?

Answers

Answer:

111.11 mL

Explanation:

Since the moles of gas and temperature are held constant the new volume can be found by using the formula for Boyle's law

[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]

where

P1 is the initial pressure

P2 is the final pressure

V1 is the initial volume

V2 is the final volume

From the question

P1 = 1 atm

P2 = 2.25 atm

V1 = 250 mL

We have

[tex]V_2 = \frac{250 \times 1}{2.25} = \frac{250}{2.25} \\ = 111.1111111...[/tex]

We have the final answer as

111.11 mL

Hope this helps you

Predict the decay process and write the nuclear equation of Cf- 255

Answers

Answer:

curium

243

,

252

/

99

Es,  

251

/

98

Cf,  

214

/

82

Pb

Explanation: Im not very good with this but here ya go!


why compounds with weak molecular forces are usually gases.

Answers

Molecular substances tend to be gases because the intermolecular forces of attraction are comparatively weak. You don't have to break any covalent bonds in order to melt or boil a molecular substance.

The longest intermolecular separation and hence the strongest intermolecular pressure of attraction can be found in the gaseous state of matter.

Although solids' intermolecular interactions were sufficient to maintain themselves in locked places, gases often have weak intermolecular forces that cause them to remain considerably separated. The gases possess greater intermolecular space than solids as a result of these weak forces.

To know more about molecular forces:

https://brainly.com/question/21826959

#SPJ1

the size of camphor kept in store house gradually decrease in size after few а days? ​

Answers

Answer:

Because it goes through the process of sublimation.

Explanation:

Element X has an electron configuration of 2-8-2. This element will combine with the oxide ion to form a compound with the formula

Answers

2+8+2 = 12 electrons
Magnesium has 12 electrons
Magnesium and oxide combine to for Magnesium Oxide
Mg^2+ + O^2- = MgO


What is the molarity of a NaOH solution when 22.14 mL of 0.105 M oxalic acid is needed to
neutralize 25.0 mL of the base.

Answers

The molarity of the NaOH solution required for the reaction is 0.186 M

We'll begin by writing the balanced equation for the reaction

H₂C₂O₄ +2NaOH —> Na₂C₂O₄ + 2H₂O

From the balanced equation above,

The mole ratio of the acid, H₂C₂O₄ (nA) = 1

The mole ratio of the base, NaOH (nB) = 2

From the question given above, the following data were obtained:

Volume of the acid, H₂C₂O₄ (Va) = 22.14 mL

Molarity of the acid, H₂C₂O₄ (Ma) = 0.105 M

Volume of the base, NaOH (Vb) = 25 mL

Molarity of the base, NaOH (Mb) =?

MaVa / MbVb = nA/nB

(0.105 × 22.14) / (Mb × 25) = 1/2

2.3247 / (Mb × 25) = 1/2

Cross multiply

Mb × 25 = 2.3247 × 2

Mb × 25 = 4.6494

Divide both side by 25

Mb = 4.6494 / 25

Mb = 0.186 M

Therefore, the molarity of the base, NaOH solution is 0.186 M

Learn more: https://brainly.com/question/25739717

PLEASE HELP 100 POINTS

identify the type of chemical reaction:

C6H12 + 9 O2 ---> 6 CO2 + 2 H2O

Answers

Answer:

Hexenes + Dioxygen = Carbon Dioxide + Water

The reaction type is combustion.

Its reactants are Hexenes - C6H12 and Dioxygen - O2

its products are Carbon Dioxide - CO2 and Water - H2O

Explanation: This was my yesterdays class

1 point
Convert 3.79 x 10^24 atoms of sodium to grams.

Answers

Answer:

is easy to poiling

Explanation:

also is dificult to melting

How many moles of CH, are present in a 13982.87 gram sample of CHg?

Answers

Moles= mass/molar mass
=13982.87/(12+1)
= 1,075.605384615385 moles

Ensure you write the states of the reactants and products.
• phosphoric acid reacts with magnesium hydroxide

Answers

H3PO4 (aq) + Mg(OH)2 (s) -> Mg3(PO4)2 (s) + H2O (l)


What makes the Earth go around the Sun?




Answers

Answer:

Just as the Moon orbits the Earth because of the pull of Earth's gravity, the Earth orbits the Sun because of the pull of the Sun's gravity. ... This happens because the Earth has a velocity in the direction perpendicular to the force of the Sun's pull.

Explanation:

To balance a redox reaction, what must be done?

The ion charge on both sides of the equation must equal zero.

Water must be added to both sides of the equation.

The increase and decrease in oxidation numbers must be balanced.

H+ and OH− must be added to opposite sides of the equation.

Answers

To balance a redox reaction, the increase and decrease in oxidation numbers must be balanced.

A redox reaction also called an oxidation- reduction reaction is a chemical reaction in which there is simultaneous gain and loss of electrons.

The species that loses electrons gets oxidized while the species that gains electrons gets reduced. This results in a change of oxidation number. The species that gets reduced decreases in oxidation number and the species that gets oxidized increases in oxidation number.

So, to balance a redox reaction, the simultaneous gain and loss of electrons must be balanced.

Thus, to balance a redox reaction, the increase and decrease in oxidation numbers must be balanced.

Learn more about redox reaction here:

https://brainly.com/question/15339159

Why do thermistors increase in conductivity when heated? What happens in normal metals? Explain on the atomic level.

Answers

Metal conductivity generally goes down or resistivity goes up with temperature goes up.

Other Questions
how do you write the equation of the line that passes through the points (-9,4) and (7,-2) What did President Theodore Roosevelt do on behalf of conservation efforts?He deregulated the mining industry in the western states.OHe supported national parks and the U.S. Forest Service.He increased the amount of natural resources allocated to corporations.He donated millions of dollars to preserve natural areas in the West. Subtract the following decimals1. 19.87 - 8.542. 7.93 - 2.033. 96.6 - 88.5 5. Seismologists use the Richter scale to measure the magnitudes and intensity ofearthquakes that occur all over the earth. (see below, some info about Richter scales,and intensity formula)Let's say an earthquake hit Santa Monica, CA and had a magnitude of 6.2. If anotherearthquake hit Charleston, SC and was a magnitude of 3.8, then how much moreintense was the earthquake in LA?Student's WorkStudent's AnswerA. 251.19 timesB. 11.02 timesC. 42.81 timesD. 2.4 timesSome additional Richter scale info...A common logarithm is a logarithm with base 10. You can write a common logarithm logio * simply as log x, withoutshowing the 10Many measurements of physical phenomena have such a wide range of values that the reported measurements arelogarithms (exponents) of the values, not the values themselves. When you use the logarithm of a quantity instead of thequantity, you are using a logarithmic scale. The Richter scale is a logarithmic scale. It gives logarithmic measurementsof earthquake magnitudo.13) 1 Hot 10Intensity formula:-= M - M-log12 ONly when i have to i gotta do the import thing of what when i love doing the 100+1? In this 1832 cartoon, President Andrew Jackson is depicted as a king holdingsvetoed bill and trampling on the U.S. Constitution. |-13| = I do not get how I solve this equation could you please help me why dose the first pearl buyer call Kino "boy"? in chapter 4 of the pearlNo links. Simplify [tex] \binom{2x + y \: \: 3y}{6 \: \: \: \: \: 4} = \binom{6 \: \: 0}{6 \: \: 4} [/tex]Find x and y I need help with this question it Is math y esta vez, por qu? ah, s, parece que el carro est mal Sodium chloride reacts with copper sulfate to produce sodium sulfate and copper chloride.2NaCl(aq) + CuSO4(aq) Na2SO4(aq) + CuCl2(s)+This equation represents aO synthesis reaction.O decomposition reaction.O single replacement reaction.O double replacement reaction.O What is 2 rounded to the nearest whole number? Please help ASAP!! Examine the Pictures. Describe a typical day for an immigrant trying to gain access to America through one of the United States immigration ports, and based on both images, how is the interview process of these two ports similar? How are they different? Find the measure of the following: m arcTR = m arcTL = m L = m R = m RTV = Which of the following is an example of genetic engineering?1.The sweetest honeydew melons are selected and the seeds extracted and planted for next years crop.2.The strongest animals in a population survive and reproduce.3.An exact replica of a frog is created from a body cell.4.A gene is introduced into salmon to make them grow twice as fast. help me please i dont understand ____________________________ is characterized by constant worry over minor and catastrophic events. Other complaints, such as muscle tension, fatigue, and irritability are also common. What is the slope of a line that is perpendicular to the line that passes through the points (4, 7) and (9, 3)? Brainliest for anyone that gives good answer!What are 3 reasons for imperialism and 3 reasons against imperialism?