molar mass for NiI2

Please help

Answer:

a. 1.99 mol

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

116 g NaCl

Step 2: Identify Conversions

Molar Mass of Na - 22.99 g/mol

Molar Mass of Cl - 35.45 g/mol

Molar Mass of NaCl - 22.99 + 35.45 = 58.44 g/mol

Step 3: Convert

[tex]116 \ g \ NaCl(\frac{1 \ mol \ NaCl}{58.44 \ g \ NaCl} )[/tex] = 1.98494 mol NaCl

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

1.98494 mol NaCl ≈ 1.98 mol NaCl

Answer:

20.05  ×10²³ molecules

Explanation:

Given data:

Mass of hydrogen = 10 g

Number of molecules of ammonia = ?

Solution:

Chemical equation:

3H₂ + N₂       →      2NH₃

Number of moles of hydrogen:

Number of moles = mass / molar mass

Number of moles =  10 g /  2 g/mol

Number of moles =  5 mol

now we will compare the moles of hydrogen and ammonia.

                 H₂            :           NH₃

                  3             :            2

                   5            :           2/3×5 = 3.33 mol

Number of molecules of ammonia:

1 mole contain 6.022 ×10²³ molecules

3.33 mol × 6.022 ×10²³ molecules / 1 mol

20.05  ×10²³ molecules

Answer:

When we cook food in the kitchen, that's the region of higher concentration of the smell. By diffusion, the smell spreads to the whole room and thereby whole house, so anyone standing at a distance, can smell it.

Answer:

smell of cooked food spread fast bc when something is heated up, the kinetic energy of the molecules/particles increases and some of them even mix with the air and moves around. the first answer is also correct (i just explained it more detaily)

so, this is the reason :)

mark as brainliest dagini ;)

Answer: It would be Sp2, because H3O+ has planar structure.

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 25 × 3.26

We have the final answer as

Hope this helps you

Answer:

c

Explanation:

I think that's the answer

Answer:

C7H6O2+C8H17OH=C15H22O2+H2O

Explanation:

by reacting alcohol and acid we get ester and water

Answer:

1. Newton's third law of motion

2. Unbalanced

3. Action

Explanation:

it helps to provide the energy which is necessary to hold two different atoms together as part of chemical compound.

Answer:

Product packaging design refers to the production of a product's exterior. Develop an organization. All these specifics allow one to consider what the sealed substance is about how to use it, who can use it, and maybe, What do you sell? For your product, there are several different packaging forms available.

Explanation:

Answer:

C.

The pan will be the same temperature as the stove.

Explanation:

Hydrogen sometimes is missing an electron and sometimes it has an extra electron.

Helium (He) and hydrogen (H) are unique elements. Hydrogen has the abilities and electrons of two groups, one and seven, and occasionally has more electrons than it does.

Electrons are defined as a subatomic particle with a negative charge that makes up the nucleus of an atom along with protons and neutrons. For scientists, it can be challenging to monitor them because of how quickly they spin. The tiniest particles in an atom, you can put 2000 of them into a proton, they are drawn to the positive charge of the protons.

Because it has no neutrons in its nucleus, hydrogen (particularly hydrogen -1) is unusual. There is only one proton in the nucleus of hydrogen. The only element without neutrons is this one. Although it has a single electron orbiting its nucleus as well, hydrogen typically contributes this electron to form a single, positively charged proton instead.

Thus, Helium (He) and hydrogen (H) are unique elements. Hydrogen has the abilities and electrons of two groups, one and seven, and occasionally has more electrons than it does.

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Answer:

The volume will goes to decrease.

Explanation:

The given problem will be solved through the Boyle's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

when pressure is going to increase the volume will goes to decrease and vice versa.

Consider the initial volume is 10 L at initial pressure of 15 atm when pressure is increased to 30 atm the volume will be,

Now we will put the values in formula,

P₁V₁ = P₂V₂

15 atm × 10 L = 30  atm × V₂

V₂ = 150 atm. L/ 30 atm

V₂ = 5 L

3.03 × 10²⁵ formula units KCl

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Unit 0

Atomic Structure

Step 1: Define

50.3 mol KCl (Potassium chloride)

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

[tex]\displaystyle 50.3 \ mol \ KCl(\frac{6.022 \cdot 10^{23} \ formula \ units \ KCl}{1 \ mol \ KCl} )[/tex] = 3.02907 × 10²⁵ formula units KCl

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

3.02907 × 10²⁵ formula units KCl ≈ 3.03 × 10²⁵ formula units KCl

Answer:

23

Explanation:

we do not care about electrons, so 11 + 12 = 23

Answer:

Beta decay is most common in elements with a high neutron to proton ratio. Gamma decay follows the form: In gamma emission, neither the atomic number or the mass number is changed. A high energy gamma ray is given off when the parent isotope falls into a lower energy state.

Explanation:

pls mark me as brainliest

Answer:

C. group 4 .................

Answer:

weathering

Explanation:

the rocks due to rain generate cracks . heat and wind helps the rock to break into smaller chunks .

this process continuous till the rock is converted into sand. and is called weathering

Answer:

1. First, I would observe the fire and the conditions of the scene, looking for the origin of the fire and looking in an accelerant was used. If I could find the origin of the fire I would make sure to not have any evidence damaged, and if I could not find the origin of would look from other forms of evidence, like clothing, flammable liquids, or igniters.

2. Secondly, I would make sure to preserve the area, and document the scene, with pictures and notes and any other forms of recording. It is important to initiate permanent documenting of the scene.

3. Thirdly, I would try to find anything flammable with a snider, and run the tests on what it could be. It is also important to make sure everybody is safe, and to evaluate for any safety hazards. Finally, I would create safety zones and communicate the hazards to people near the scene.

4. I would next contact the incident commander, and also search for any evidence that says whether the fire was an accident or was arson. If the fire was arson, I would locate any evidence that could lead to suspects, and if the fire was an accident, I would try to find all the evidence that shows how it happened.

5. Once I collect all the evidence, I would organize it in the best way possible and then I would use the hydrocarbon method in order to test the evidence that I found.

6. After the results come back based on the evidence, I would compare the results with the information found about the fire security in the building, the people involved, and I would start in trying to solve the crime.

Answer:

The proportion of light transmitted by glazing is specified by the Visible Light Transmittance, which is recorded as either TVw (visible transmittance of the window) or VLT (visible light transmittance). These terms are interchangeable, but in Australia, the Window Energy Rating Scheme uses Tvw in its ratings.

While the VLT/Tvw rating varies between 0 and 1, most double glazed windows rate between 0.3 and 0.7 , which means that between 30% and 70% of the available light passes through the window. The illustration above shows you how the view changes, as the amount of light getting through the window changes.

Explanation:

Answer:

D

Explanation:

Most of the fluids have some resistance to their movement due to viscosity. The gases also exhibit viscosity. The molecules that make up olive oil are larger as compared to alcohol. So olive oil has high viscosity. The correct option is D.

The viscosity of a fluid can be defined as the measure of a fluid's resistance to flow. It can also be known as the measure of a fluid's thickness or its resistance to the objects passing through it.

A fluid with high viscosity resists motion because of its strong intermolecular forces which gives high internal friction. The fluids can flow easily if they have very little intermolecular force of attraction. The SI unit of viscosity is poiseiulle (PI).

Here the molecules which make up the olive oil are found to be shorter than those which make up alcohol. So the oilve oil molecules have more resistance to sliding past one another.

Thus the correct option is D.

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Answer:

There are 504,576,000 seconds in 16 years.

Explanation:

To calculate the number of seconds in 16 years, let's first use simpler units since we are going to be working with large numbers.

First, calculate the number of seconds in one day (24 hours). We can do this with the common knowledge that there are 60 seconds in a minute, and 60 minutes in an hour, multiply the seconds and minutes:

[tex]60*60=3600[/tex]

Therefore, there are 3600 seconds in an hour. Since we know that there are 24 hours in a day, we can multiply the seconds by hours:

[tex]3600*24=86400[/tex]

Therefore, there are 86,400 seconds in a day.

Knowing that there are 365 days in a year, we can multiply 86,400 seconds by 365 days to calculate the number of seconds in a year:

[tex]86400*365=31536000[/tex]

Therefore, there are 31,536,000 seconds in a year.

Since the question is asking the number of seconds in 16 years, we can simply multiply 31,536,000 seconds by 16 years:

[tex]31536000*16=504576000[/tex]

Therefore, there are 504,576,000 seconds in 16 years.

Answer:

To persuade at any means necessary. Ex. I bribed a man with money.

Answer:

the underlined word is "bribes" which means you try to temp the gaurds to take money and in return you get something back. for example, i bribe someone with money to bring me a zebra from africa because its illiegal but you get persuaded with money to do it

Explanation:

Answer:

B

Explanation:

all living things are composed of one or more cells

Answer:

in terms of chemistry, the forward reaction balances the backward reaction :)

Explanation:

Answer:

The water is the medium of the wave

Answer:

6

Explanation:

The equation given in this question is:

H₂ + N₂ ---> NH₃

To balance this equation i.e to make sure that the number of atoms on each side of the equation is the same, one would make use of coefficients.

The balanced equation is:

3H₂ + N₂ ---> 2NH₃

The coefficients are the number behind each element or molecule. According to this question, the sum of each coefficient is 3 + 1 + 2 = 6

Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

[tex]volume = \frac{mass}{density} \\[/tex]

From the question we have

[tex]volume = \frac{25}{0.8765} \\ = 28.52253...[/tex]

We have the final answer as

Hope this helps you