I need help in this problem for an assignment. Please

Explanation:

1 mol of an atom (irregardless of the element) contains the Avogadro's number of atoms. This is given as;

1 mol = 6.022 * 10^23 atoms

For a neutral atom;

NUmber of protons = Number of electrons

The relationship between proton and neutron is given as;

Mass Number = Protons + Neutrons

Ag-108

Atoms =  6.022 * 10^23 atoms

Protons = Atomic Number = 47

Electrons = 47

Neutrons = Mass Number - Protons = 108 - 47 = 61

Pt-195

Atoms =  6.022 * 10^23 atoms

Protons = Atomic Number = 78

Electrons = 78

Neutrons = Mass Number - Protons = 195 - 78 = 117

Answer:

Explanation:

You can't award 20 points once you have awarded 5.

One

2K + Cl2 ==> 2KCl

It's True

There are 2 Ks and Cl2 has 2 atoms making up on the left.

On the right, 1 molecule of KCl has 1 Potassium and 1 Cl. But there are 2 molecules so between the two of them, there's 2 Potassiums and 2 Cl

Two

The reactant side is the Left side. Cl2 means there are 2 Cl atoms making Cl2. Answer B

Three

False: There are 2 but read below.

I really don't know how to answer that. It's not qualified enough. There are a total of 2 Chlorines on the right hand side when there are 2 molecules. I think you are intended to answer False, but don't be surprised if you get it wrong.

The best way for helping the earth water supply that should be last for future generations should be considered option b. where it decrease the residential water usage.

The average American family should be used for more than 300 gallons of the water per day at home. Approximately 70% of the use should arise indoors,

Moreover, outdoor water should be accounted for 30% of household that should be high in drier parts for the country and it should be more water intensive landscape.

Therefore, the option b is correct.

Learn more about water here: https://brainly.com/question/20229458

Answer:

4.0625

Explanation:

1 grams Oxygen to mol = 0.0625 mol

0.0625 x 65 =4.0625

Answer:

what the other guy said

Explanation:

Answer:

The intercostal muscles also stabilize the chest wall; in full inspiration they contract to prevent the intercostal spaces being sucked inwards by the negative intrathoracic pressure generated by contraction of the diaphragm.

Explanation:

Hope this helps! Brainliest is always appreciated :)

Answer: A, C, D

Explanation:

Right on Edge

Answer:

1.) Charging rechargeable batteries allows the non-spontaneous reaction within the batteries to proceed.  

3.) The rechargeable battery is an example of a voltaic cell.

4.) The rechargeable battery is an example of an electrolytic cell.

Explanation:

got it right on edge

Answer:

6

Explanation:

This question is seeking for an equivalent of one expression. The first expression says 1/3 of 12, which means 1/3 × 12 = 4. To find 2/3 of a number that will give us 4, we say

Since; 1/3 of 12 is 4

Then, 4 = 2/3 of x, where x is the number, which when multiplied by two-third (2/3) will result to 4.

4 = 2/3 × x

4 = 2x/3

Cross multiply

2x = 3 × 4

2x = 12

x = 12/2

x = 6.

This means that; 1/3 of 12 = 2/3 of 6

Answer:

Cancer is a disease caused when cells divide uncontrollably and spread into surrounding tissues.

Explanation:  Cancer is caused by changes to DNA. Most cancer-causing DNA changes occur in sections of DNA called genes. These changes are also called genetic changes.

-Hope this helped

Answer:

15.547437000000029

Explanation:

Answer:

sulfur hexafluoride....

Answer:

Explanation:

Sulfur hexafluoride (SF6) or sulphur hexafluoride (British spelling), is an extremely potent and persistent greenhouse gas that is primarily utilized as an electrical insulator and arc suppressant. It is inorganic, colorless, odorless, non-flammable, and non-toxic. SF.

Answer:

Percent mass of oreo = 35.11%

Explanation:

Given:

Mass of oreo =  17.1

Mass of 1st cookie = 16.2

Mass of 3rd cookie = 15.4

Find:

Percent mass of oreo

Computation:

Total mass = Mass of oreo + Mass of 1st cookie + Mass of 3rd cookie

Total mass = 17.1 + 16.2 + 15.4

Total mass = 48.7

Percent mass of oreo = [Mass of oreo/Total mass]100

Percent mass of oreo = [17.1 / 48.7]100

Percent mass of oreo = 35.11%

Answer:

18.88 grams of Al2O3

Explanation:

Here's my work

10g Al    l    1 mol Al    l    1 mol Al2O3  l   102g Al2O3

             l    27g Al       l   2 mol Al         l    1 mol Al2O3

Balanced equation: 2Al +Fe2O3  --> Al2O3 + 2Fe

So pretend it's in a chart,  you fill it out starting from the top left corner and then moving diagonally down and then straight up and then diagonally down and the straight up, etc.  You start with 10 grams of Al, so the first thing you want to do is convert it into moles.   So you find the mass of Al(which is 27) and then you have 1 mol of Al on top.  So the next thing you have to do is to change it to Al2O3 since that is what the question is asking for.  This is where it's important you balanced the equation correctly because you're going to compare the mol ratios.  To do this, you have to look at the coefficients in front of Al, which is a 2.  so you write 2 mol Al on the second bottom section.  and then on top you look at the balanced equation again and look at the coefficient in front of Al2O3, which there is none so it's a 1.   Then all you have to do is convert back to grams because the question wants it in grams.  so you put 1 mol on the bottom and then you look at your periodic table to figure out the mass of Al2O3.    Al= 27,  O= 16.   (27x 2) +  (16 x 3)  = 102.     Finally you just multiply all the numbers on the top row and then multiple all the numbers on the bottom row and then divide what you get on the top by the bottom.  

Answer:

i just feel rlly bad that you need it now, i cant help but all i can say is you got this mate

Answer:

(C3H4O3) x 2 = C6H8O6, the molecular formula for Vitamin C.

Answer:

C) Bromine is produced

Explanation:

When iodine chemically reacts with potassium bromide then it will lead to the formation of potassium iodide and bromine. This reaction is actually a single displacement reaction in which bromine from potassium bromide is displaced by iodine atom.

When iodine solution is added to potassium bromide solution ,bromine is produced. It is an example of displacement reaction.

Displacement reactions are chemical reactions in which one element present in a compound is replaced by another element.The reaction generally takes place between a molecule and a compound.

During the reaction, the anion of compound is replaced by the molecule and the anion of the compound is transformed into a molecule.When iodine molecule in form of solution is reacted with solution of potassium bromide solution of potassium iodide is obtained.

During this reaction anion of potassium bromide that is bromine is replaced by iodine forming solution of potassium iodide and molecule of bromine is liberated in the form of gas.

Learn more about displacement reactions,here:

https://brainly.com/question/13328989

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Answer: B

Explanation: The clouds act almost like a lid. Think of it like when you put tin foil over food before it goes in the oven. so that even after it is removed from the heat the tin foil traps it causing it to stay warm.

Answer:

Zinc oxide is react with sulphuric acid to give zinc sulphate and water.

zinc oxide +sulphuric acid ⇒ zinc sulphate + water

Zno    +H2So4 ⇒ZnSo4 + H2O

SULPHURIC ACID = H2SO4

ZINC SULPHATE =ZnO

Explanation:

Answer:

i believe its blue

Explanation:

do the yoga boi TUT yooooooooooooooooooooo9ooooooooot

Answer:

Aquatic plants have aur filled tissues to make them easy to float.....

Explanation:

It provides buoyancy

Answer:

Mass in an isolated system can neither be destroyed nor created.

Explanation:

In a chemical reaction, mass can neither be created nor be destroyed.

it was produced by a plant

Answer:

graphite

Explanation:

graphite is also good conductor of electricity

Answer:

4. 125°C

Explanation:

I hope this helps you :D

Answer:

Explanation:can you take a pic of it a little up so i can see the h please??

Answer:

yes

Explanation:

Na2CO3 + H2SO4 --> Na2SO4 + H2O + CO2

Answer:

0.059 moles are present in 2.6 g of CO₂

Explanation:

Molar mass is the mass of one mole of a substance, which can be an element or a compound. That is, it is the amount of mass that a substance contains in one mole.

In this case, the mass of each element being:

then the molar mass of the compound is:

CO₂=  12 g/mole + 2*16 g/mole= 44 g/mole

Then you can apply the following rule of three: if by definition of molar mass 44 grams of CO₂ are present in 1 mole, 2.6 grams will be present in how many moles?

[tex]amount of moles=\frac{2.6 grams*1 mole}{44 grams}[/tex]

amount of moles= 0.059 moles

0.059 moles are present in 2.6 g of CO₂

Answer:

A. hibernation

Answer:

Hibernation.

Explanation:

Answer:

radio waves

Explanation:

which has the longest wavelength and lowest frequency and energy. Ultraviolet light (UV) is divided into three regions: UV A, wavelength = 400 - 320 nm UV B, wavelength = 320 - 280 nm