Which of the following isotopes would deflect the most in a mass spectrometer?
a) Sr-84
b) Sr-86
c) Sr-87
d) Sr-88

Answers

Answer 1

The correct answer is Sr-84. The lightest specie is the most deflected while the heaviest specie is the least deflected.

In mass spectroscopy, chemical substances can be identified by looking at their respective mass-to-charge ratios of gaseous ions in electric and magnetic fields. The is achieved using a mass spectrometer.

The lightest specie undergoes the greatest deflection while the heaviest specie undergoes the heaviest deflection accordingly in a mass spectrometer.

In this case, Sr-84, is the lightest specie hence it should be the least deflected specie.

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Related Questions

what's the atomic weight of salt ?

Answers

Answer:

58.44 g/mol

Explanation:

58.44 g/mol

One formula unit of sodium chloride (NaCl) would weigh 58.44 amu

Please help :)
A chocolate chip cookie recipe calls for 0.050 moles of baking soda (NaHCO3). How many grams should the chef mass out?

Answers

Answer: 4.2 g

Explanation:

Note that the number of moles is equal to the actual given mass of the substance over its molar mass.

n = m/M, where n is the moles, m is the given mass, M is the molar mass.

In manipulating this formula, you get that the given mass is equal to the number of moles multiplied by the molar mass of substance.

m = n x M.

(Na = 23, H = 1, C = 12, O = 16)

Molar mass = 23 + 1 + 12 + (16x3)

= 84

1) m = 0.050 x 84
2) m = 4.2 g

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According to the mole concept, 4.2 g of baking soda should be weighed out.

What is mole concept?

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass  in grams present in one mole  of atoms is its atomic mass.

Baking soda has molar mass of 84 g /mole, thus mass is calculated using number of moles formula which is mass= molar mass×number of moles, which is mass=84×0.050=4.2 g.

Thus,4.2 g of baking soda should be weighed out by chef.

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A pupil has drawn the electronic structure of fluorine and the diagram is shown below. However,
mistakes have been made. State three mistakes that have been made.

Answers

The first shell can only hold 2 electrons, but the pupil placed in 8 electrons.

The second shell can hold up to 8 electrons, but the pupil only placed in 2 electrons.

Flourine only has 9 total electrons, yet there are 10 electrons in the diagram.

Answer:

Explanation:

In the Fluorine atom there are 2 electrons in the innermost shell and 7 i the outer shell.

Which coefficient of O2 is needed to balance the equation C3H8 + O2 → 3CO2 + 4H2O?
A.
2
B.
3
C.
5
D.
6

Answers

The answer is C. 5

Hope I helped

Which of the following describes a limiting reactant? Question 10 options: A) The reactant that runs out last and limits how much product can be made B) The reactant that is present at the smallest mass C) The reactant that runs out first and limits how much product can be made D) An inert element

Answers

Answer:

The correct choice is option C) The reactant that runs out first and limits how much product can be made

Explanation:

The limiting reactant is a reactant in a chemical reaction that gets consumed first and thus limits how much product can be formed.

Answer:

The reactant that runs out first and limits how much product can be made

Explanation:

Which would increase the reaction rate?
O A. Decreasing the reactant concentrations
B. Removing heat from the system
O C. Adding a catalyst
O D. Lowering the value of k

Answers

Answer:

C

Explanation:

C. Adding a catalyst would increase the reaction rate.

What is a catalyst?

A catalyst is a substance that increases the rate of a chemical reaction by lowering the activation energy required for the reaction to occur.

A catalyst enhances the probability of successful collisions between reactant molecules, which raises the pace of the reaction by offering an additional avenue for the reaction to occur.

As there would be fewer reactant molecules accessible to react with one another, decreasing reactant concentrations would result in a slower pace of reaction.

Due to the fact that chemical reactions often require energy to take place, eliminating heat from the system would also slow down the reaction rate. A lower value for k would result in a lower rate constant, which would lower the response rate.

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with balanced chemical equations, show the different stages of fermentation​

Answers

Answer:

formula for fermentation is: C6H12O6 → 2 C2H5OH + 2 CO.

What are differences between viruses and bacteria?

Answers

Answer:

viruses are computer program that replicate itself and distribute itself to another computer but bacteria is micro organism that contaminate our food and can make us sick

What would you use to measure the height of a sample?

Question 2 options:

ruler


beaker


graduated cylinder


electronic balance

Answers

Answer:

please clear ur ques with image

it's unable to be understood

...

Is there any Chemical including in BIOGESIC?
Can you tell me if it was included?​

Answers

Answer:

This combination product contains 2 medications, acetaminophen and an antihistamine. Acetaminophen helps to reduce fever and/or mild to moderate pain (such as headache, backache, aches/pains due to muscle strain, cold, or flu).

Explanation:

it will help you. may be

Answer:

looooser

mark me brailist

What is the actual specific heat capacity of the silver in the Calorimetry Lab?


0.234 J/gK

0.133 J/gK

0.035 J/gK

0.023 J/gK

Answers

The actual specific heat capacity of the silver in the Calorimetry Lab is given as  0.234 J/gK.

What is specific heat capacity?

Specific heat capacity is the amount of heat required to raise a unit mass of a substance by 1 degree kelvin.

The specific heat capacity of silver or amount of heat required to raise a unit mass of silver metal is 0.234 J/gK.

Thus, the actual specific heat capacity of the silver in the Calorimetry Lab is given as  0.234 J/gK.

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PLS HELP!! WILL MARK BRAINLIEST! 99 POINTS!

Answers

You're going to first balance the chemical equation.

After that, convert the grams of Na into moles of Na, and then multiply that with the ratio of moles of NaCl to Na, and then convert the mol of NaCl into grams in order to obtain the theoretical yield, since we are given that Na is the limiting reactant.

After that, plug the values into the yield formula, doing some basic algebra, and you should get your result.

You're going to first balance the chemical equation.

After that, convert the grams of Na into moles of Na, and then multiply that with the ratio of moles of NaCl to Na, and then convert the mol of NaCl into grams in order to obtain the theoretical yield, since we are given that Na is the limiting reactant.

After that, plug the values into the yield formula, doing some basic algebra, and you should get your result.

What information does the specific heat capacity give about a substance?
A. How much energy is needed to raise its temperature
B. How much heat is released when it changes phases
C. How much energy is needed to overcome an activation energy
O
0
D. How much heat is stored in its chemical bonds

Answers

Specific heat capacity tells about how  much energy is needed to raise its temperature.

What is specific heat capacity?

Specific heat capacity is defined as the amount of energy required to raise the temperature of one gram of substance by one degree Celsius. It has units of calories or joules per gram per degree Celsius.

It varies with temperature and is different for each state of matter. Water in the liquid form has the highest specific heat capacity among all common substances .Specific heat capacity of a substance is infinite as it undergoes phase transition ,it is highest for gases and can rise if the gas is allowed to expand.

It is given by the formula ,

Q=mcΔT

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In the compound Ni2O3, nickel's oxidation number is_____
oxidation number is -2.
and oxygen's

Answers

Answer:

+3

Explanation:

The name of this compound would be nickel (III) oxide. Oxygen typically has a charge of -2. Given there are 3 oxygen atoms, that would equal a charge of -6. The nickel is the cation and must equal the charge of the anion, so must have a charge of +6. Since there are 2 nickel atoms, the charge on each must be +3.

Isotopes are atoms that have the same mass number, but different numbers.
atomic. True or false

Answers

Answer: Im not sure but I think it is false.

Explanation:

What is the order, plz answer

Answers

Answer:

C A B

Explanation:

come on, you also know this from normal water waves.

which ones are stronger (= have more energy) ? the small ones or the big ones ?

and the same applies to all waves. the bigger the waves (higher amplitude), the more energy.

equation for the reaction btn nitric acid and metal X whose valence is 3​

Answers

(a) Reaction of nitric acid with non-metal:
C+4HNO
3

⟶CO
2

+2H
2

O+4NO
2


S+6HNO
3

⟶H
2

SO
4

+2H
2

O+6NO
2


(b) Nitric acid showing acidic character:
K
2

O+2HNO
3

⟶2KNO
3

+H
2

O
ZnO+2HNO
3

⟶Zn(NO
3

)
2

+H
2

O
(c) Nitric acid acting as oxidizing agent
P
4

+20HNO
3

⟶4H
3

PO
4

+4H
2

O+20NO
2


3Zn+8HNO
3

⟶3Zn(NO
3

)
2

+4H
2

O+2NO

hope that helps you please mark brainliest

15. The starting diol for this molecule is
O A. ethanol.
O B. propan-1,3-dioic acid.
O C. propan-1,3-diol.
O D. ethan-1,2-diol.

Answers

Answer with explanation

The starting diol for this molecule is :-The starting diol for this molecule is :-D) ethan-1,2-diol.

Hope my answer is helpful to you ☺️

How does the chemistry of the ocean change in response to high levels of CO2 in the atmosphere?

Answers

Ocean acidification is occurring because excess carbon dioxide (CO2) in the atmosphere is being absorbed at the surface of the ocean at an increasing rate. This excess CO2 results in more hydrogen ions, which increases the acidity of the ocean.

If the magnet loses its superconducting properties, all of the liquid helium could suddenly turn to a gas. If an MRI machine contains 1950 L liquid He with a density of 0.125g/mL, how many liters of He gas would be formed at 25°C and 1 atm? Use the ideal gas law. Round your final answer to two significant figures. Show your work. (4 points)

Answers

Answer:

Determine the volume of helium gas

Answer:

About 1,495 Liters of Helium.

Explanation:

To calculate the volume of helium gas formed when the magnet loses its superconducting properties, we can use the ideal gas law:

PV = nRT

Where:

P = Pressure (in atm)

V = Volume (in liters)

n = Number of moles of helium gas

R = Ideal gas constant (0.0821 L.atm/(mol.K))

T = Temperature (in Kelvin)

First, we need to find the number of moles of helium gas:

Given volume of liquid helium (V_liquid) = 1950 L

Density of liquid helium (ρ) = 0.125 g/mL = 0.125 g/cm³

To convert density from g/cm³ to g/L, we multiply by 1000:

Density of liquid helium (ρ) = 0.125 g/cm³ * 1000 cm³/L = 125 g/L

Mass of liquid helium (m) = Volume * Density = 1950 L * 125 g/L = 243,750 g

Next, we need to convert the mass of liquid helium to moles using the molar mass of helium:

Molar mass of helium (M) = 4.0026 g/mol

Number of moles (n) = Mass / Molar mass = 243,750 g / 4.0026 g/mol ≈ 60,907 mol

Now, we have the number of moles of helium gas (n), and we can calculate the volume of helium gas (V_gas) at 25°C (298.15 K) and 1 atm:

P = 1 atm

T = 25°C = 298.15 K

V_gas = nRT / P

V_gas = (60,907 mol) * (0.0821 L.atm/(mol.K)) * (298.15 K) / (1 atm)

V_gas ≈ 1,495 L

Therefore, approximately 1,495 liters of helium gas would be formed at 25°C and 1 atm when the magnet loses its superconducting properties.

from the equation 2PbO + C = 2Pb + CO2, detemine which one is reactant is oxidised and which is reduced.​

Answers

Answer:

Explanation:

C is oxidised because C up to C+4

PbO is reduced because PbO from Pb2+ down to Pb0

Answer:

lead (Pb) is reduced carbon is oxidized

Pesticides and fertilizers are a major cause of
O air pollution
O acid rain
o the greenhouse effect
O groundwater pollution


Answers

Answer:

it means air pollution Environment. The chemicals and nutrients found in fertilizers, while beneficial for agricultural crops, can be lethal in high doses for fish, birds and other wildlife. Pesticides, designed to kill pests chemically, are also dangerous when leached into soil or groundwater supplies.

How many grams of solute is there in 250 mL of a 0.10M CaCl2 solution ?

Answers

Answer:

2.775 g

Explanation:

Given that;

Number of moles = concentration × volume

Concentration = 0.10M

Volume =250 mL

Number of moles = 250/1000 × 0.10

Number of moles = 0.025 moles

Also;

Number of moles = mass/molar mass

Molar mass of CaCl2= 111 g/mol

Mass = Number of moles × molar mass

Mass = 0.025 moles × 111 g/mol

Mass= 2.775 g

Which statement best describes what happens as thermal energy from the
sun warms the pavement?
A. The thermal energy absorbed by the pavement is destroyed.
B. The thermal energy that is not absorbed by the pavement is
destroyed.
C. Some thermal energy is absorbed by the pavement, and some is
destroyed.
D. The thermal energy of the sun is transferred to the pavement.

Answers

Answer:

D

Explanation:

The correct answer would be that the thermal energy of the sun is transferred to the pavement.

Thermal energy refers to the internal energy possessed by a system by virtue of the movement of molecules within such a system. In other words, it is the heat energy possessed by a system.

When the thermal energy from the sun warms the pavement, it means that the thermal energy from the sun has been successfully transferred to the pavement. Thermal energy can be transferred by conduction, convection, or by radiation depending on whether the system is a solid, liquid, gas respectively.

The correct option is, therefore, D.

57:17
A ball that has a mechanical energy of 65 J has 12 J of kinetic energy. The ball has blank
energy.
J of potential energy

Answers

Answer:

53 Joules

Explanation:

Applying the law of conservation of mechanical energy.

Law of conservation of mechanical energy: States that energy although, energy can not be transformed from one form to another, the total energy of the system remain the same.

I.e,

Mechanical Energy = E.K+P.E..................... Equation 1

Where E.K = Kinetic energy, P.E  = Potential energy.

From the question,

Given: Mechanical energy = 65 Joules, K.E = 12 J

Substitute these values into equation 1 and solve for P.E

65 = 12+P.E

P.E = 65-12

P.E = 53 Joules

If you started with 2 moles of Nitrogen and 3 moles of Hydrogen, then you
would not have any leftover reactants. Explain which material would be
limiting since no hydrogen or nitrogen were left over?

N2 + 3H2 -> 2NH3

Answers

Answer: 0.3 moles NH3

Explanation:

what is mean by vector​

Answers

Answer:

A quantity having direction as well as magnitude is called vector.

What is occurring during the flat section of the graph below on the red arrow labeled boiling, between liquid and gas? gas (3.) OO liquid temperature solid time (minutes) O A. Heat is being absorbed, allowing particles of the liquid to overcome the atmospheric pressure. B. Heat is being absorbed, allowing particles of the liquid to overcome the vapor pressure. C. Heat is being released, allowing particles of liquid to overcome the pressure, and is why the temp does not increase. D. The temperature is no longer increasing even though heat is still being added because the heat is being absorbed to lower the melting point​

Answers

Heat is been absorb allowing particles of the liquid to overcome the vapor pressure

Which state of matter has particles that vibrate and can change place but remain touching in a random arrangement.
A. Liquid
B. None of these
C. Plasma
D. Gas

Answers

The particles in the solid are touching with very little space between them. The particles in a liquid usually are still touching but there are some spaces between them. The gas particles have big distances between them.

...

Liquids Solids and Gases:

NON OF THESE

Select all the correct answers.
Which two properties are characteristic of lonic compounds?

Answers

Answer:

1. Ionic compounds have high melting points.

Ionic compounds have high melting points.2 Ionic compounds are hard and brittle.

Ionic compounds have high melting points.2 Ionic compounds are hard and brittle.3 Ionic compounds dissociate into ions when dissolved in water.

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