A chemist prepares a solution of potassium iodide (KI) by measuring out 88. umol of potassium iodide into a 200. mL volumetric flask and filling the flask to
the mark with water.
Calculate the concentration in mol/L of the chemist's potassium iodide solution. Round your answer to 2 significant digits.


Please Help me!

anaphase

or if not

telophase

Answer: I think the answer is, 3.312177825e+24 atoms

Explanation: I had a problem similar to this, Hope this helps!

Answer:

So if you have 5 mole, you have: 5 x (6.022 x 10^23) = 3.011 x 10^24 atoms.

Explanation:

Basically the answer is 44.0095 :)) have a great day!!

Answer:

The vertical columns of the periodic table are called groups, or families. The significance is elements with similar properties are placed in the same vertical columns. The horizontal rows of the periodic table are called periods. The significance is that properties vary from left to right along the rows.

Explanation:

We just did this in science

Answer:

columns in the periodic table are reffered to as "periods". periods represent elements with the same number of shells i.e all elements in period 1 have 1 shell (k shell) and vice versa.

Answer:

The heat needed to warm 225 grams of water from 88.0ºC to its boiling point, 100.0ºC, is 11,296.8 J

Explanation:

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

In this way, between heat and temperature there is a direct proportional relationship (Two quantities are directly proportional when there is a constant, so that when one of the quantities increases, the other also increases; and the same happens when either of the two decreases.) . The constant of proportionality dependent on the substance that constitutes the body and its mass, and is the product of the specific heat and the mass of the body. So, the equation that allows to calculate the calorie exchanges:

Q = c * m * ΔT

Where Q is the heat exchanged by a body of mass m, constituted by a substance of specific heat c and where ΔT is the variation in temperature

In this case:

Replacing:

Q= 4.184 [tex]\frac{J}{g*C}[/tex] *225 g* 12 C

Solving:

Q= 11,296.8 J

The heat needed to warm 225 grams of water from 88.0ºC to its boiling point, 100.0ºC, is 11,296.8 J

Answer:

LiBr

Explanation:

Group 1 metals give a characteristic colour when subjected to flame test. The colour can tell us exactly what the identity of metal being studied.

Now, Lithium metal gives a red flame. Hence the group 1 metal ion is Li^+. Similarly, bromides give a creamy precipitate when reacted with silver nitrate.

This means that the solid substance under study is LiBr.

Answer:

1.53

Explanation:

The acceleration of gravity is 9.8 i believe. To get force divide 15kg by 9.8 and you should get 1.53( rounded to hundredth)

Answer:

second one... maybe

hope it helps :-)

Answer:

Faster

number

reactants

increases

Explanation:

The rate of reaction refers to how fast or slow a reaction occurs. The rate of reaction is dependent on factors such as surface area, concentration, temperature, nature of reactants, catalyst etc.

The concentration refers to the amount of reactants present. When the acid is made more concentrated, its amount is increased. This increases the number of collisions between the acid particles and the marble chips ultimately leading to increase in the rate of reaction according to Arrhenius theory.

Answer:

D.

Explanation:

I had looked it up on the quiz site

Answer:

A

Explanation:

i thought b but majorities of water companies dont use ocean water and use waters from rivers,and lakes yk

Answer:d

Explanation:

Answer:

C

Explanation:

Just took the test

As the plane  plane flies at a constant speed of 800 km/hr the plane will take 5 hours 25 minutes to  fly   distance of 4200 km.

Speed is defined as the rate of change of distance with time. It has the dimension of distance by time. Thus, the SI unit of speed is given as the combination of the basic unit of distance and the basic unit of Time. Thus, the SI unit of speed is metre per second. In everyday life, kilometre per hour or in countries like US and UK miles per hour are used as the unit of speed.

The SI unit of speed can be derived from the formula of velocity. Basically, velocity is the vector equivalent of speed. Mathematically, velocity is given as the ratio of displacement to the time taken.So, 800 km is traveled in 1 hour so 4200 km will be traveled 4200/800=5.25 which is 5 hours and 25 minutes.

Thus, the plane will take 5 hours 25 minutes to  fly   distance of 4200 km.

Learn more about speed,here:

https://brainly.com/question/7359669

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Answer:

nah

Explanation:

dont wast my points

Answer:

3Pb + 2H3PO4 —> 3H2 + Pb3(РO4)2

Explanation:

Pb + H3PO4 —>Н2 + Pb3(РO4)2

In order to balance the equation you must look at the number of elements already in the equation.

We see, on the left side, that:

Pb = 1, H = 3, P = 1, and O = 4

We see, on the right side, that:

Pb = 3, H = 2, P = 2, and O = 8

    Our goal is to balance these numbers so that they are equal. This is because of the law of conservation of matter states that "the amount of matter stays the same, even when matter changes form".

  We cannot change the subscripts, so we add coefficients.

3Pb + 2H3PO4 —> 3H2 + 1Pb3(РO4)2

Now, on the left side:

Pb = 3, H = 6, P = 2, and O = 8

And, on the right side:

Pb = 3, H = 6, P = 2, and O = 8

So, the balanced equation is: 3Pb + 2H3PO4 —> 3H2 + Pb3(РO4)2

*I hope that this helped you. Have a great day & good luck!

Sound waves is not the form of electromagnetic radiation.

The information regarding electromagnetic radiation is as follows:

Therefore we can conclude that sound waves is not the form of electromagnetic radiation.

Learn more: brainly.com/question/21995826

Answer:

Mass of MgO = 36.27 g

Mg produced less number of moles of MgO it will act as limiting reactant while oxygen is present is in excess.

Explanation:

Given data:

Number of moles of Mg = 0.9 mol

Number of moles of O₂ = 1.1 mol

Number of moles of MgO = ?

Which reactant is in excess = ?

Which one is limiting reactant = ?

Solution:

Chemical equation:

2Mg + O₂    →        2MgO

now we will compare the moles of MgO with oxygen and magnesium.

                Mg           :          MgO

                  2            :           2

                  0.9         :         0.9

                O₂            :          MgO

                  1            :           2

                  1.1          :          2/1×1.1 = 2.2

Mg produced less number of moles of MgO it will act as limiting reactant while oxygen is present is in excess.

Mass of MgO:

Mass = number of moles × molar mass

Mass = 0.9 mol × 40.3 g/mol

Mass = 36.27 g

Answer:

The equation for wave speed can be used to calculate the speed of a wave when both wavelength and wave frequency are known. Consider an ocean wave with a wavelength of 3 meters and a frequency of 1 hertz. The speed of the wave is: Speed = 3 m x 1 wave/s = 3 m/s.

SO... take your meters and hezert and do tha same

Explanation:

Plz mark me as brainlyist

Answer:

D

Explanation:

Answer:

5 point) Chemists used systems and order because they study the basic unit of all forms of matter, which is the atom . However, there are several different kinds of atoms, called elements . Chemists organize these elements using the periodic table .

Explanation:

Answer:

1.29L

Explanation:

The equation that represents the change in energy for the expansion of a gas under constant pressure is:

W = PΔV

Where W is work in atmL, P is pressure in atm and ΔV is change in volume in liters

Work in atmL:

131.5J * (1atmL / 101.325J) = 1.298atmL

P in atm:

777 torr * (1atm / 760torr) = 1.022atm

ΔV is:

W / P = 1.298atmL / 1.022atm = 1.27L

As initial volume of the gas is 22.3L = 0.0223L

Final volume = 1.27L + 0.0223L =

Answer:

To reduce acid rain.

Explanation:

Sulfur often removed from fuels before they are burnt because when sulfur is burned it get converted into sulfur dioxide and when sulfur dioxide mix with atmosphere, it can cause acid rain which is very harmful.

So, in order to reduce acid rain, sulfur often removed from fuels before they are burnt.

Hence, the correct answer is "To reduce acid rain."

Answer:

The term organic chemistry originally meant the chemistry of compounds obtainable from plants and animals

The volume of Hydrogen gas : 24 L

Given

16 L Ammonia(NH₃)

Required

The volume of Hydrogen gas

Solution

Reaction

N₂ + 3H₂ ⇒ 2NH₃

Avogadro's hypothesis:  

In the same T,P and V, the gas contains the same number of molecules  

So the ratio of gas volume will be equal to the ratio of gas moles  

V₁/n₁=V₂/n₂

From the equation, mol ratio of H₂ : NH₃ = 3 : 2, so volume of H₂ :

= 3/2 x volume of NH₃

= 3/2 x 16 L

= 24 L

Answer: Potassium, Carbon and Oxygen, third option.

Explanation: K= Potassium, C= Carbon, O=Oxygen

Answer:

The music was played at an natural frequency of the drums

Explanation:

The natural frequency of a body is the frequency when we notice that the system oscillates without any driving or damping force. This is also referred to as the normal mode of vibration because all parts of the system move sinusoidally at the same frequency.

So, when music is played at the natural frequency of the drums, the drums tends to vibrate without any driving force. We can now say that the drums are 'playing themselves'.

Answer:

Si

Explanation:

Dispersion force or London force is the force of attraction between two atoms or molecules in a substance in solid , liquid and gas . In gas , this force is minimum and in solid this force is maximum . In solid this force is maximum in metals in which this force forms  metallic bond .

Among the given substances , Si , Sn , MgO , C₂₀H₄₂ are solid , so dispersion force will be high in them .

Among all as mentioned above , Si will have highest dispersion force . It is due to four covalent bond that bind two atoms of Si in solid silicon . Its three dimensional crystal structure consist of silicon atoms , all bound by four covalent bonds .