Calculate the average atomic mass of element Q, if the isotopic composition of element Q is as follows: Q-107 has an abundance of 78%, and Q-110 has an abundance of 22%. Type your answer rounded to two decimal places.​

Answers

Answer 1

Answer:

5

Explanation:


Related Questions

Using dimensional analysis, how many kilometers are there in 34 inches?

Answers

Answer:

There are many ways to figuring this out: you could use a ruler, a calculator or scrap paper.

Explanation:

This is not an actual flat out answer, but it’s helpful methods to getting the answer the next time you are stuck. Hope you are having a nice day. Bless your heart and soul.

5. Why are the noble gases such as helium (He) and neon (Ne) grouped
together in the periodic table?
A They are nonreactive gases.
B. They are highly reactive metallic solids.
C. They are dangerous gases when combined with water.
D. They are liquid at room temperature and have high boiling points.
Pues

Answers

Answer:

A. They are nonreactive gases


How are oxidation states of transition metals indicated in the names of metal
compounds?
A. Prefixes are used to indicate oxidation states.
B. Group numbers are used to indicate oxidation states.
C. Roman numerals are used to indicate oxidation states.
D. Subscripts are used to indicate oxidation states.

Answers

Answer:

The anser is c

Roman numerals are used to indicate oxidation states. Hence, option C is correct.

What is the oxidation state?

An oxidation state is a number given to the atom of an element when participating in a chemical reaction.

Roman numerals are used to indicate oxidation states of transition metals.

The names for transition metal compounds often have roman numerals in them, because the roman numerals indicate the charge on the transition metal. But the oxidation state of Cu in CuO is +2, and the oxidation state of Cu in [tex]Cu_2O[/tex] is +1. Name metal first and charge and transition metal with a roman numeral.

The transition metals may form more than one ion, thus it is needed to be specified which particular ion we are talking about. This is indicated by assigning a Roman numeral after the metal. The Roman numeral denotes the charge and the oxidation state of the transition metal ion.

[tex]Fe^{2+}[/tex] would be named iron (II) and [tex]Fe^{3+}[/tex] would be named iron (III).

Hence, option C is correct.

Learn more about the oxidation state here:

brainly.com/question/11313964

#SPJ2

HELP!
A. W
B. X
C. Y
D. Z

Answers

Answer:

B

Explanation:

A sealed plastic bottle of apple juice is placed in freezer. Which statement describes what is happening while the juice is changing form a liquid to a solid?

A.) Kinetic energy is increasing. B.) Particle motion is coming to a complete stop.
C.) Particle speed is staying the same.
D.) Temperature is decreasing steadily.​

Answers

Your answer is B Particle motion is coming to a complete stop.That's your answer!

Hope this helps!!!

Answer:

B

Explanation:

i have the same test

Suppose that green spheres represent chlorine atoms, yellow-green spheres represent fluorine atoms, white spheres represent hydrogen atoms, and all the molecules are gases

Answers

Answer:

a. Reactants: F₂ and HCl molecules

Products: Cl₂ and HF

b. 4HCl + 2F₂ ----> 4HF + 2Cl₂

c. Single replacement reaction

Note: The question is not complete. The complete question is found below as well as in the attachment.

Suppose that green spheres represent chlorine atoms, yellow-green spheres represent fluorine atoms, white spheres represent hydrogen atoms, and all the molecules are gases:

a. write a formula for each of the reactants

b. write a balanced equation for the reaction

c. indicate the type of reaction as combination,decomposition, single replacement, double replacement, or combustion

Explanation:

a. From the models shown in the diagram, The reactants are F₂, HCl while the products are Cl₂ and HF respectively

b. Equation for the reaction is given below;

4HCl + 2F₂ ----> 4HF + 2Cl₂

c. The reaction is single replacement reaction such that fluorine gas molecules replace the chlorine atoms in hydrogen chloride to form hydrogen fluoride with the liberation of chlorine atoms as gaseous molecules.

Explain how Newton’s third law of motion applies to a system of objects

Answers

Answer:

Newton's third law of motion states that whenever a first object exerts a force on a second object, the first object experiences a force equal in magnitude but opposite in direction to the force that it exerts. Newton's third law is useful for figuring out which forces are external to a system

Explanation:

Answer:

Newton's third law of motion states that whenever a first object exerts a force on a second object, the first object experiences a force equal in magnitude but opposite in direction to the force that it exerts. ... Newton's third law is useful for figuring out which forces are external to a system.

Explanation:

What part of the earth are the plate tectonics on?
lithosphere

outer core

asthenosphere

inner core

Answers

Outer core, thank me later
It should be outer core, if not lithosphere

The motion of a car on a position-time graph is represented with a horizontal line. What does this indicate about the car's motion?
OA. It's not moving
OB. It's moving at a constant speed.
OC. It's moving at a constant velocity.
OD
It's speeding up.

Answers

B because a horizontal line goes straight across which shows a constant rate
Hope this helps!

How do the data support your claim above? Explain your statement above.

Answers

Answer:

the data will support my theory if the results are right for my hypothisis

Answer:

That guys answer is right i'll be trying my best to answer as much wrong in correct answers if wrong i will correct them

Explanation:

sorry i couldn't help theres over more then 200,000 people who uses brainy

what is the density of aluminum if you have a piece of aluminum that is 10.5cm x 10.5cm x 0.1cm and has a mass of 29.8 grams?​

Answers

Answer:

2.7g/cm³

Explanation:

Given parameters:

Dimension of the aluminum  = 10.5cm x 10.5cm x 0.1cm

Mass of the aluminum  = 29.8g

Unknown:

Density  = ?

Solution:

Density of a substance is its mass per unit volume;

  Mathematically;

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

Volume of the aluminum  = 10.5cm x 10.5cm x 0.1cm = 11.025cm³

  So, insert the parameters and solve;

  Density  = [tex]\frac{29.8}{11.025}[/tex]   = 2.7g/cm³

What is the density of an object (g/cm) that has a mass of 2.78 g & a volume of 10.0
cm3?

Answers

Answer:

The answer is 0.28 g/cm³

Explanation:

The density of a substance can be found by using the formula

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

From the question we have

[tex]density = \frac{2.78}{10} \\ = 0.278[/tex]

We have the final answer as

0.28 g/cm³

Hope this helps you

Answer:

p = 0.278 g/cm3

Explanation:

A divalent metal oxide contains 60 % of metal. What is atomic weight of metal ?​

Answers

Atomic weight of metal : 24

Further explanation

Proust states the Comparative Law that compounds are formed from elements with the same Mass Comparison so that compounds have a fixed composition of elements

Divalent metal oxide=XO

MW O = 16

MW XO₂ =  X+16

[tex]\tt \%mass=\dfrac{Ar~X}{X+16}\times 100\%\\\\0.6=\dfrac{X}{X+16}\\\\0.6(X+16)=X\\\\0.6X+9.6=X\\\\0.4X=9.6\rightarrow X=24[/tex]

The ____ energy of an object increases with its height.
Thermal
Chemical potential
Gravitational Potential
kinetic

Answers

Answer:

chemichal potential

Explanation:

Answer:

Gravitational Potential

A year has 365 days, and a day has 24 hours. If an hour has 60 minutes and a minute has 60 seconds, how many seconds are there in 1 year?

54,750 s
525,600 s
3.15 Times. 107 s
1.89 Times. 109 s

Answers

Answer:

31,536,000 seconds

Explanation:

off google

Answer:

3.15 x 10^7s

Explanation:

If 0.484J of heat is added to 0.1372g of water, how much will the temperature increase?

0.263 °C
0.927 °c
0.843 °C
0.460 °C

Answers

Answer:

ΔT = 0.843 °C

Explanation:

Given data:

Heat added = 0.484 J

Mass of water = 0.1372 g

Temperature increase = ΔT = ?

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

Specific heat capacity of water is 4.184 j/g.°C

Now we will put the values in formula.

0.484 j = 0.1372 g × 4.184 j/g.°C× ΔT

0.484 j = 0.574j/°C× ΔT

ΔT = 0.484 j / 0.574j/°C

ΔT = 0.843 °C

Element X reacts with chlorine to form an ionic compound that has the formula XCl₂. To which group on the Periodic Table could element X belong?

Answers

Answer:

Group 2 is the correct answer.

Explanation:

Chlorine has a charge -1. It means that X is +2 so that the formula is XCl2.

find the molar mass of this

Answers

Explanation:

Given problem:

Find the molar mass of:

  SO₃ and C₁₀H₈

Solution:

The molar mass of a compound is the mass in grams of one mole of the substance.

To solve this, we are going to add the individual atomic masses of the elements in the compound;

  Atomic mass;

       S = 32g/mol; O = 16g/mol; C = 12g/mol and H = 1g/mol

For  SO₃;

     = 32 + 3(16)

     = 32 + 48

     = 80g/mol

For C₁₀H₈

      = 10(12) + 8(1)

      = 120 + 8

       = 128g/mol

argon is an inert gas give reason.​

Answers

Answer:

You're right

Argon is an inert gas.

Explanation:

Answer:

Argon is in zero group and it has octet structure so argon will not react with any compound

an example of a physical change that does not involve any changes in CHEMICAL PROPERTIES. Explain which physical properties have changed and list a chemical property which has not changed.

Answers

Answer:

Ripping a Paper

Explanation:

Physical Properties changed - The size has decreased, and the shape has changed.

Chemical property- Flammability

What is the value of index fossils to the fossil record?

Answers

Search Results
Featured snippet from the web
Index fossils are fossils of great value in this correlation work because they are widely distributed and were present on Earth only for a limited period of time, making the relative data of strata more precise.


Why do you think Earth's plates move on the surface?

Answers

Plates at our planet's surface move because of the intense heat in the Earth's core that causes molten rock in the mantle layer to move. It moves in a pattern called a convection cell that forms when warm material rises, cools, and eventually sink down.

Explanation:

heat in the Earth's core

How long does it take for new fossil fuels to be created?
A.millions of years
B.billions of years
C. thousands of years
D. hundreds of years​

Answers

Answer:

millions of years sometimes even hundred of millions of years

Answer:

How long does it take for new fossil fuels to be created?

Explanation: so it takes 65 million years to creat new fossil fuels so i think it may be  A.millions of years i am sorry if i am wrong but i do beleave i am right

3. Which element is a nonmetal? *
1 point
Nitrogen (N)
Iron (Fe)
Titanium (Ti)
Potassium (K)

Answers

There are 7 elements in total but to answer this question it should be Nitrogen (N)

HELP ME PLEASE!!! I NEED THIS OR I WILL FAIL!!!

Answers

Answer:

replacement

Explanation:

Because the No and The Ci switch but it might not be the answer but I know that they have to switch and replacement sounds like the best answer

Answer:

Oxidation

Explanation:

Hope this helps :)

Help! I am in a hurry! Will get brainliest if correct!

Answers

Answer:

nonmetel

Explanation:

Answer:

Its a non-metal

Explanation:

Elements that tend to gain electrons to form anions during chemical reactions are called non-metals. These are electronegative elements. They are non-lustrous, brittle and poor conductors of heat and electricity (except graphite). Non-metals can be gaseous, liquids or solids.

Glycerol has a density of 1.26g/mL. What is the mass of 3000.mL of glycerol?

Answers

Hey you got a picture you can call the number one phone call you got it and send

How do tectonic plates move at convergent subduction boundaries? Insert a drawing with the arrows that show the movement

Answers

Answer:

If two tectonic plates collide, they form a convergent plate boundary. Usually, one of the converging plates will move beneath the other, a process known as subduction. ... As the sinking plate moves deeper into the mantle, fluids are released from the rock causing the overlying mantle to partially melt.

How many grams of nickel 58.69 (No,58.69 g/mol) are in 1.57 moles of nickel

Answers

Answer:

92.1

Explanation:

1.57 * 58.69

The end result of ecological succession is called?
1.) Primary Ecosystem
2.) Secondary Ecosystem
3.) Climax Community
4.) none of these

Answers

climax community is the answer i believe
Other Questions
CAN SOMEONE PLZ HELP (I will give branliest please help me)Which linear equation represents a line that is parallel to the line drawn and includes point P? y = 42 - 4 4x + 3y = 15y=-30 +3.25-3. + 4y = -5 An Eastbound train (E) traveling 95 mph and a Westbound train (W) traveling 110 mph leave the same train station at different times. After 4 hours, they are 4 00 miles apart. Which system of linear equations can be used to determine the time that each of the trains has been traveling? how does john react to the narrator's plea? HELP PLEASE 16 POINTS AND BRAINLIEST Pls help me Ill give brainliest. PLEASE HELP ILL GIVE BRAINLIESTWhich source is the most credible for research about animal rights, specifically the treatment of lab animals?a blog written by an anonymous animal-rights activistthe website of a business that uses animals to test their productsa segment from a weekly television news showan online article written by an owner of a lab that performs animal testing create your own six-word memoir You are taking an image of a patient who is in extreme discomfort while participating in the CT scanning process. Which of the following qualities must you exhibit to obtain a clear and accurate image? O communication skills O interpersonal skills o detail oriented physical endurance How far will 25 N of force stretch a spring with a spring with a spring constant of 125 N/m? What is the volume of the prism below? A. 150 cubic units B. 300 cubic units C. 55 cubic units D. 1,500 cubic units What type of bond would be expected between Mg and Ti?A.hydrogen bondBionic bondC.covalent bondD.metallic bond A rectangle has a length that is three feet more than twice it's width. The perimeter of the rectangle is 78 feet. State the value for the width. Clinical thermomerter PROBLEM SOLVING Find the value of k so that the graph of the equation has the given y-intercept.y = -1/3x + 5/6k; b = - 10K=? A summary of this paragraph should (1 point) be the same length as the paragraph. include details like the length of the runway. restate each of the ideas in the paragraph. give an overview of the paragraphs main details. If you're put on trial, the government has to provide you with an attorney even if you can't afford one. The Supreme Court case that provided the basis for this is: a. Griswold v Connecticut b. furman v Georgiac. Gideon v Wainwright d. New York Times v US What is the awnser to that question The price of a notebook has Risen to $9.61today. Yesterdays price was $9.72 Find the percentage increase. Round your answer to the nearest tenth of a percent. 7. What is the area of the shaded region?5.6 cm6.4 cm5.8 cm1.2 cm0.8 cm