Boron (B) has two Isotopes, boron-10 and boron-11. The atomic weight of boron is the

A. combined masses of boron-10 and boron-11

B. average number of neutrons in boron-10 and boron-11

C. weighted average of the masses of boron-10 and boron-11

D. mass of boron-10 minus the mass of boron-11​

Answers

Answer 1

Answer:

C. is the correct answer

Explanation:

I just completed this question and got it correct.


Related Questions

Calcium carbide ( CaC2) reacts with water to produce acetylene (C2H2) as shown in the unbalanced reaction below: CaC2(s)+H2O(g)->Ca(OH)2(s)+C2H2(g). How many grams of H2O are required to completely react with 82.4g of CaC2

Answers

Answer:
46.3g H2O

Explanation:
start by balancing it: CaC2(s) + 2H2O(g) -> Ca(OH)2(s) + C2H2(g)

then use factor label method to solve

82.4g CaC2 x (1 mol CaC2/64.10g CaC2) x (2 mol H2O/1 mol CaC2) x (18.016g H2O/1 mol H20) = 46.3g H2O

The given reaction can be balanced as follows: CaC2 + 2H2O → Ca (OH)2 + C2H2. Grams of water required to completely react with 82.4 g of CaC2 is 46.28 g.

What is a balanced reaction?

In balanced reaction, the number of each and every element on both side is balanced. In the given reaction to balance the number of H and O, add 2 to H₂O so that, all the species will be equal in number on both side.

Now, as per the balanced reaction, 2 moles of water is required to reacts with 1 mole of CaC2.

Mass of one mole of water = 18 g/mol.

                                   2 mole = 36 g

Mass of one mole of CaC2 = 64.09 g/mol

Thus 36 g of water is required to react with 64.09 grams of calcium carbide. Mass of water required to react with 82.4 g of calcium carbide is calculated as follows:

Mass of water = (36 g×82.4 g)/64.09 g = 46.28 g

Hence, 46.28 grams of water is required to completely react with 82.4 g of calcium carbide.

To learn more about calcium carbide, please refer the link.      

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Explain how NOTHING is ZERO, but ZERO is more than NOTHING?

Answers

Answer:

Nothing can be zero, but zero isn't nothing. If someone asks you if you have money and you say "I've got nothing!" when you actually don't have a cent, then you have zero money. However, zero is a number, so it itself is something, therefore more than nothing. So technically, you do have something.

When zero is on a number line, you could classify it as nothing, but it is the number between 1 and -1. Hypothetically speaking, if you took the zero away, wouldn't the number line be the same?

Zero isn't positive or negative. The number zero on a graph, or in a coordinate can tell you where something is. Zero can be a word to describe if something is existent, or non-existent.

Okay, my brain hurts.

Explain what you think a compound is

Answers

Answer:

a thing that is composed of two or more separate elements; a mixture.

Explanation:

Which of the following is one way creativity can help scientists?

Answers

Answer:

One way creativity is helpful to scientists is when they need to come up with a experiment or cure for something their imaginastion is very helpful. The reason for that is with creativity they could get answers much quicker!

Explanation:

Answer:

I agree with that answer

How many significant figures are in the following number?
5.67 x 106
3
6
4

Answers

The answer would be 3 because every number other than 0 is significant. 0 is significant if it is sandwiched between other numbers like 0.50078 (5 sig figs) or if it’s at the end of a decimal 0.450 (3 sig figs)
another practice example would be 0.00456 (3 sigfigs)

How did Edward Teller died?

Answers

Answer:

septembar 9 2003

Explanation:

he died in september 9 2003

Answer:

Your answer:

His cause of death was a stroke ( heart attack)

hope this helped you

please mark as the brainliest (ㆁωㆁ)

60 N net force is applied to a 12 KG box. What is the acceleration of the box?

Answers

Answer:

The answer is

5 m/s²

Explanation:

The acceleration of an object given it's mass and it's net force can be found by using the formula

[tex]acceleration = \frac{force}{mass} \\ [/tex]

From the question

force = 60 N

mass = 12 kg

So we have

[tex]acceleration = \frac{60}{12} \\ [/tex]

We have the final answer as

5 m/s²

Hope this helps you

what does it mean to say that a hypothesis is falsifiable

Answers

Answer: This means that the answer can be proven wrong.

Explanation:

Hope this helps!!

Answer:

is means it can be proven false

Will give Brainlist!!!!!!! PLEASE HELP! Express the results of the following calculations with the correct number of significant figures: 5502.5 + 21 + 0.06

Answers

0.06 has one significant figure (unless there are zeros written after it). So I would round the result to 6000. Some teachers prefer at least 2 significant figures though.

which of the following is a scientific law?

Answers

climate changing a

nodvnfosdjfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfvhnfv

its a

Answer:

Climate change

Write the net ionic equation for the acid-base reaction of hydrochloric acid with phosphine. (Include states-of-matter under the given conditions in your answer.)

Answers

The net ionic equation for the acid-base reaction of hydrochloric acid with phosphine is PH3(aq) + H⁺(aq)  → PH⁺₄ (aq)

What is a Chemical reaction?

A chemical reaction shows us how substances interact which brings about  changes in the  composition of the  reactants. Two types of Chemical reactions includes:

the net ionic equation balanced chemical equation.

The net ionic equation of a  chemical equation tells us only elements and ions directly involved in the chemical reaction.

Now for the reaction of hydrochloric acid, HCl with phosphine, PH3,

First write the aqueous substances in their ionic components

PH3(aq) + HCl(aq)→ PH4Cl(aq)

PH3(aq) + H⁺(aq) +Cl⁻(aq) → PH⁺₄ (aq) + Cl⁻(aq)

Then we  remove the ions that do not take part in the reaction,  Cl⁻(aq)

So we are left with

PH₃(aq) + H⁺(aq)  → PH⁺₄ (aq)

Therefore, the net ionic equation for the reaction of hydrochloric acid with phosphine is PH₃(aq) + H⁺(aq)  → PH⁺₄ (aq)

Learn more on Net ionic equation here:https://brainly.com/question/20488944

Need help with this

Answers

Answer:

environmentalism I think

Explanation:

...................

Answer:

2nd choice answer

Explanation:

thats ez tbh

- Write down Rutherford's atomic model with diagram .also write down defects of Rutherford's atomic model. - write down neil bohar atomic model

Answers

this is the answer

sorry if the answer is wrong


8. In
studies, scientists do not interfere with what is going on.

Answers

Answer:

Observational

Explanation:

This is the answer because researchers or scientist observe the effect of a  diagnostic test, treatment or other intervention without trying to change anything.

23°C = ______ K

-250
296
123
23

Answers

Answer:

296

Explanation:

Tk = ºC + 273

Tk = 23 + 273

T = 296 K

Give me a hand,Solve this problem,Need everyone's help​

Answers

Answer:

A. 8.8 g.

B. 5.3 g.

C. 449 g.

Explanation:

A. Determination of the mass of CO2.

Mole of CO2 = 0.2 mole

Molar mass of CO2 = 12 + (2×16)

= 12 + 32

= 44 g/mol

Mass of CO2 =?

Mole = mass /Molar mass

0.2 = mass of CO2 /44

Cross multiply

Mass of CO2 = 0.2 × 44

Mass of CO2 = 8.8 g

B. Determination of the mass of Na2CO3.

Mole of Na2CO3 = 0.05 mole

Molar mass of Na2CO3 = (2×23) + 12 + (3×16)

= 46 + 12 + 48

= 106 g/mol

Mass of Na2CO3 =?

Mole = mass /Molar mass

0.05 = mass of Na2CO3 /106

Cross multiply

Mass of Na2CO3 = 0.05 × 106

Mass of Na2CO3 = 5.3 g

C. Determination of the mass of Fe(OH)2.

Mole of Fe(OH)2 = 5 moles

Molar mass of Fe(OH)2 = 55.8 + 2(16 + 1)

= 55.8 + 2(17)

= 55.8 + 34

= 89.8 g/mol

Mass of Fe(OH)2 =?

Mole = mass /Molar mass

5 = mass of Fe(OH)2/89.8

Cross multiply

Mass of Fe(OH)2 = 5 × 89.9

Mass of Fe(OH)2 = 449 g.

1.54x10-1 L / 2.36x 10-45 solve this in scientific notation

Answers

Answer:

Fish is the best time to go

Explanation:

Chicken nuggets and a salad and some onion rings and a new charger

How do you do a one pager online!?!?!
I couldn’t find science so I just chose chemistry

Answers

You can use pic collage or google docs.

SHOW YOUR WORK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
An experiment was conducted to find the mass of one mole of carbon atoms. The results of the experiment showed that a mole of carbon atoms had a mass of 15.78 g. The accepted value of a mole of carbon atoms is 16.00 grams. What is the percent error in this experiment?

Answers

Answer:

1.375%

Explanation:

Percent Error = measured value - accepted value/ accepted value x 100

Measured Value: 15.78

Accepted Value: 16.00

Work:

[tex]\frac{15.78-16.00}{16.00}[/tex] * 100

[tex]\frac{-.22}{16}[/tex] * 100 = -1.375

You cannot have a negative percentage. Therefore the answer is 1.375%

What is Polymerase Chain Reaction?

Answers

Answer:

Polymerase Chain reaction is a method used by scientists to making A LOT (millions to billions) of copies of a DNA sample which then allows scientists to take a small of that DNA and increase the amount to a very large amount to study the DNA into further detail.

Polymerase Chain Reaction (PCR)

   Polymerase chain reaction (PCR) is a technique for replicating or copying a specific portion of a DNA strand; leads to millions of copies of the DNA segment technique for replicating or copying a specific portion of a DNA strand; leads to millions of copies of the DNA segment.

Completely classify jet fuel.
Element
Heterogeneous Mixture
Pure Substance
Compound
Homogeneous Mixture
Mixture

Answers

Answer:

Mixture

Explanation:

A mixture is defined as a material formed from the combination of two or more different substances.

Jet fuel is a mixture of hydrocarbons including crude oil petroleum and kerosene or gasoline. Jet fuels are made by the process of refining and blending of different petroleum and kerosene.

Hence, the correct option is "Mixture".

Diffrentiate between atoms and ions.

Answers

Hello. What is an Atom?
The smallest unit of matter. It is indivisible and consists of neutrons, electrons and protons. Atoms can take part in chemical reactions. Combination of atoms together forms molecule. Always the number of protons and electrons are equal. Independent life may or may not be feasible within a solution. Nucleus of the atom is formed by protons and neutrons. Surrounding the nucleus are the electrons.

What is an Ion?
Atoms where the electrons and protons are not equal are called ions. Ions are charged particles. They can be either positively charged ions or negatively charged ions. If an atom is charged electrically it is considered an ion. If an atom contains maximum number of electrons than protons, then it is called anion. If an atom contains maximum number of protons than electrons, then it is called cation. Independent existence in a solution. When an atom gains or loses electrons, ion is formed. Hope it helps

I really need help with this before 5:10
Show your work

Your big brother has been brageing about how he can bench press 4.000 grams at the gym. Sounds impressive.
but you know better. Use your skills to find how many pounds of weight he is actually pressing.

Answers

CAN YOU HELP ME ANWSER MINE ILL HELP YOU

why does neon have a higher first ionization energy than fluorine

Answers

I’m just here for the points sorry

Find the force if the mass is 6 kg and the acceleration is 12 m/s/s?​

Answers

Answer:

72 Newton

Explanation:

force=mass x acceleration due to gravity

Force applied on object is 72 Newton

Given that;

mass of thing = 6 kg

Acceleration = 12 m/s²

Find:

Force applied on object

Computation:

Force = mass × acceleration

Force applied on object = 6 × 12

Force applied on object = 72 Newton​

Learn more:

https://brainly.com/question/19734564?referrer=searchResults

Which answer below correctly identifies the type of change and the explanation for the boiling of water?
physical change because even though the change caused the temperature of the water to increase,
the water's physical properties remained exactly the same
physical change because even though gas formation was observed, the water was undergoing a
state change, which means that its original properties are preserved
chemical change because gas formation was observed, which indicated that the water was
transformed into a different substance
0 chemical change because a temperature change was observed, which indicated that the water was
transformed into a different substance

Answers

Answer: physical change

Explanation:

as the water heats up the atoms begin to move faster changing the physical form

Express a mass of 0.056 mg in grams.
Answer in units of g.

Answers

Answer:

0.000056g

Explanation:

1 mg = 0.001 g

Or if it helps move your decimal sign over left 3 places.

how to calculate molecular mass?

Answers

Please refer to the attachment!

Hope it will help u,

Thankyou

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This element has nine more electrons than Technetium

Answers

Answer:

Tellurium

Explanation:

Technetium's position on the periodic table is 43 and Tellurium's is 52

The results of an investigation are the
(Blank)

Answers

Answer: ending results

Explanation:

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