What is the molar mass of h2

Answers

Answer 1

Answer:

The answer is one

Explanation:

I will just type any rubbish here bcuz my answer should be more than 20 words..... Just know the answer is 1


Related Questions


If repeated measurements agree closely but differ widely from the
accepted value,
these measurements are

neither precise nor accurate.

accurate, but not precise.

both precise and accurate.

precise, but not accurate.

Answers

Answer:

precise but not accurate

Explanation:

precision is getting the same answer over and over, but not necessarily correct.

accuracy is getting the exact, or VERY close to exact, value

since the question states the repeated measurements agree closely it is saying it is precise, but when it says differ widely from accepted value it is saying NOT accurate.

The volume of a gas with an initial pressure of 380 mmHg atm increases from 5.0 L to 8.0 L. What is the final pressure of the gas, in atm, assuming no change in moles or temperature?
A) 238 atm
B) 2.4 atm
C) 0.31 atm
D) 0.80 atm
E) 8.0 atm

Answers

Answer:

0.31 atm

Explanation:

The new pressure can be found by using the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

Since we are finding the new pressure

[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]

From the question

760 mmHg = 1 atm

380 mmHg = 0.5 atm

We have

[tex]P_2 = \frac{0.5 \times 5}{8} \\ = 0.3125[/tex]

We have the final answer as

0.31 atm

Hope this helps you

Write the charge balance for an aqueous solution of arsenic acid, H3AsO4, in which the acid can dissociate to H2AsO24 , HAsO24 2, and AsO34 2. Look up the structure of arsenic acid in Appendix G and write the structure of HAsO24 2.

Answers

Answer:

Kindly check the explanation section.

Explanation:

When the Arsenic acid,H3AsO4 is put in water it dissociates to form or give out 1 proton, 2 protons or 3 protons that is 1H^+, 2H^+ and 3H^+. Check the equation showing the dissociation reactions as given below;

H3AsO4 ===========> H^+ + AsO4^-

H3AsO4 ===========> 2H^+ + AsO4^2-

H3AsO4 ===========> 3H^+ + AsO4^3-

Therefore, the total charge balance is given as:

[H^+] =[OH^-] + [ AsO4^-] + 2[ AsO4^2-] + 3[ AsO4^3-].

Kindly note that the [OH^-] is from water.

Which type of reaction is NaCl + AgNO3 → NaNO3 + AgCl?

synthesis
decomposition
oxidation
replacement

Answers

Answer:

replacement

Explanation:

Which one of the following
statements about the following
reaction is false?
CH4(g) + 202(g) → CO2(g) +
2H2O(g)

Answers

Answer:

5

Explanation:

Writing Chemical Equations


Write and balance the equation showing the reaction between lead (II) sulfide and carbon monoxide to form lead metal and carbon dioxide.

Answers

Answer:Gaseous C4H8 + oxygen gas ---> carbon dioxide + water

C4H8(g) + 6O2(g) ---> 4CO2(g) + 4H2O(g)

Not the one u want but its similar so u can get an idea of what the one u want is like  

How many molecules of glucose (C6H12O6,M=180.18g/mol) are contained in 144mL of 0.280 M glucose solution?

Answers

We are given:

Volume of Glucose solution = 144 mL  OR 0.144 L

Molarity of Glucose solution = 0.280 M

Number of moles of Glucose in the solution:

From the definition of Molarity, we know that:

Molarity = number of moles / volume(in L)

in this equation, multiplying both sides by Volume, we get:

number of moles = Molarity*Volume(in L)

replacing the variables

Number of moles = 0.280*(0.144L)

Number of moles = 0.04

Number of Molecules in the solution:

We know that:

Number of molecules = Number of Moles * Avogadro's number

Number of molecules = 0.04 * 6.022 * 10²³

Number of molecules = 0.24088 * 10²³

Number of molecules = 2.4088 * 10²²

Therefore, there are 2.4088 * 10²² molecules of Glucose in the given solution


Please help !!!

The atomic number of sodium is 11. How many neutrons does an isotope with a mass number of 22 have ?

Answers

Answer: 12 neutrons
Explanation: The mass number of an element tells us the number of protons AND neutrons in an atom (the two particles that have a measurable mass). Sodium has a mass number of 23amu. Since sodium has 11 protons, the number of neutrons must be 23 – 11 = 12 neutrons.

Answer:

11

Explanation:

Which statement about the surface of the moon is true?
o There is water and air, but no life on the moon's surface.
O There is no air, wind, liquid water or life on the moon's surface.
There are liquid seas on the moon's surface.
It is very windy on the moon's surface.



Answers

Answer:

There is no air, wind, liquid water or life on the moons surface.

Explanation:

Answer:

ok i know it wont help now bc this was in 2020 but i did this on my lessons and its: There is no air, wind, liquid water, or life on the moon's surface.

Explanation:

i got all the right except the last one

Using the data below, calculate the enthalpy for the combustion of C to CO

C(s) + O2(g)--> CO2 (g) ΔH1 = -393.5 kJ

CO(g) + 1/2O2(g) -->CO2(g) ΔH2= -283.0kJ

Target: C(s) + 1/2O2(g) --> CO(g) ΔH3=??

Group of answer choices

Answers

Answer:

ΔH3 = -110.5 kJ.

Explanation:

Hello!

In this case, by using the Hess Law, we can manipulate the given equation to obtain the combustion of C to CO as shown below:

C(s) + 1/2O2(g) --> CO(g)

Thus, by letting the first reaction to be unchanged:

C(s) + O2(g)--> CO2 (g) ; ΔH1 = -393.5 kJ

And the second one inverted:

CO2(g) --> CO(g) + 1/2O2(g) ; ΔH2= 283.0kJ

If we add them, we obtain:

C(s) + O2(g) + CO2(g) --> CO(g) + CO2 (g) + 1/2O2(g)

Whereas CO2 can be cancelled out and O2 subtracted:

C(s) + 1/2O2(g)  --> CO(g)

Therefore, the required enthalpy of reaction is:

ΔH3 = -393.5 kJ + 283.0kJ

ΔH3 = -110.5 kJ

Best regards!

Use scientific notation to express the number 355000 to:

1) one significant figure
2) two significant figures
3) three significant figures
4) four significant figures
5) six significant figures

Answers

Answer:

1) 4*10^5

2) 3.6*10^5

3) 3.55*10^5

4) 3.550*10^5

5) 3.55000*10^5

Explanation:

1) 4 x [tex]10^5[/tex]

2) 3.6 x [tex]10^5[/tex]

3) 3.55 x [tex]10^5[/tex]

4) 3.550 x [tex]10^5[/tex]

5) 3.55000 x [tex]10^5[/tex]

What is scientific notation?

A number is written in scientific notation when there is a number greater than or equal to 1 1 11 but less than 10 10 1010 multiplied by a power of 10 10.

Significant figures are the number of digits in a value, often a measurement, that contributes to the degree of accuracy of the value.

1) 4 x [tex]10^5[/tex]

2) 3.6 x [tex]10^5[/tex]

3) 3.55 x [tex]10^5[/tex]

4) 3.550 x [tex]10^5[/tex]

5) 3.55000 x [tex]10^5[/tex]

Learn more about scientific notation here:

https://brainly.com/question/18073768

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A radioactive element having and atomic number 82 and atomic mass 214 emits a beta particle. The resulting element is:______.

Answers

Answer:

[tex]\frac{214}{83} Bi[/tex]

Explanation:

In beta emission, a neutron is converted into a proton thereby reducing the neutron:proton (N/P) ratio.

When a beta emission occurs, the mass number remains the same while the nuclear charge increases by one unit. The daughter nucleus is found one place to the right of its parent in the periodic table.

is na2o a element or compound

Answers

Answer:

Its a compound :PP

Explanation:

have a good day

Answer:

Compound

Explanation:

There are 20 mice in a 5 m2 field ecosystem. The population density of mice is _____.

20 per m 2
5 per m 2
25 per m 2
4 per m 2

Answers

Answer:

4per m 2

20 mice divided by 5 so it will be 4 per m 2

What do you think is the common link between each of the phenomena shown?

Answers

Answer:

sounds wave

Explanation:

From alarm, microwave, laser, TV, water waves and a musical instrument, everything release sounds.

(Not the same)

If it convinced you please add this in the brainlist

Atoms are the
piece of an

Answers

Answer:

Our current model of the atom can be broken down into three constituents parts – protons, neutron, and electrons. Each of these parts has an associated charge, with protons carrying a positive charge, electrons having a negative charge, and neutrons possessing no net charge.

You have 3.00 L of a 3.12 M solution of NaCl(aq) called solution A. You also have 2.00 L of a 2.00 M solution of AgNO3(aq) called solution B. You mix these solutions together, making solution C.
Calculate the concentration (in M) of Ag+ ions in solution C.

Answers

Answer:

[tex]M=0.8M[/tex]

Explanation:

Hello!

In this case, since the presence of silver ions is in AgNO3 only, we can compute their moles by using the volume and concentration of the corresponding salt:

[tex]n_{Ag^+}=2.00L*2.00\frac{mol}{L}=4molAg^+[/tex]

Next, since the total volume of solution C is 5.00 L, the required concentration of silver ions turn out:

[tex]M=\frac{4.00mol}{5L} =0.8M[/tex]

Best regards!

what does the changing the Aperture do when taking a photo? *
4.What effect can you get from using a slow shutter speed? *
5.What effect can you create by using a quick shutter speed

Answers

Answer:

Slower shutter speeds like 1/60 second and slower cause a blurring effect. If you want to take a picture using a slow shutter speed, it is best to mount the camera on a tripod and use image stabilization (such as SteadyShot® technology) to reduce the chance of any unwanted camera movement.

The first big effect of it is motion blur. If your shutter speed is long, moving subjects in your photo will appear blurred along the direction of motion. ... If you use an especially fast shutter speed, you can eliminate motion even from fast-moving objects, like birds in flight, or cars driving past.

Explanation:

I need to know the weighted average please!

Answers

Answer:

63.5456 amu

Explanation:

[tex]0.6917*62.9296+0.3083*64.9278= 63.5456\ amu[/tex]

List three things, other than the name, symbol, atomic number, and average atomic mass, you can discover about an element using the periodic table in Figure 6.9.

Answers

Answer: State of matter, Subcategory in the metal-metalloid-nonmetal trend, and electrons per shell.

Explanation:

How many moles are in a sample of 4.57 x 1024 atoms of neon (Ne)?
a.7.59 mol Ne
b.27.5 mol Ne
c.91.4 mol Ne
d.151 mol Ne

Answers

Answer:

A 7.59 mol Ne

Explanation:

The number of moles of Ne in a sample of 4.57 x 10²⁴ atoms of neon (Ne) are 7.59 mol of Ne. Hence Option (A) is the correct option. It can be solved with the help of Mole concept.

What is Mole concept ?

The mole, symbol mol, is the SI base unit of amount of substance.

The quantity amount of substance is a measure of how many elementary entities of a given substance are in an object or sample.

n = given number / Avogadro's number

  = 4.57 x 10²⁴ / 6.022 x 10²³

  = 7.59 mol of Ne

Therefore, The number of moles of Ne in a sample of 4.57 x 10²⁴ atoms of neon (Ne) are 7.59 mol of Ne. Hence Option (A) is the correct option. It can be solved with the help of Mole concept.

Learn more about Mole here ;

https://brainly.com/question/26416088

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What is true of all atoms?

Answers

Answer:

Atoms are the building blocks of matter. They are the smallest particles of an element that still have the element's properties. All atoms are very small, but atoms of different elements vary in size. Three main types of particles that make up all atoms are protons, neutrons, and electrons.

Explanation:

Answer:

Atoms are the basic building blocks for life

Answer please thanks

Answers

Answer:

7. A. ee

8. Genotypes in which the dominant gene must show: Both A & B

9. Genotypes in which the recessive genes must show: A. aa

CAN YOU PLZ HELP ME ITS TIMED BRAINLIEST!
ONLY ANSWER IF YOU KNOW THE ANSWER PLZ!
The diagram shows two chromosomes paired up.

Which process is being shown?
sexual reproduction
independent assortment
crossing over
chromosome separation

Answers

Answer:

the sexual reproduction

Explanation:

35. Which subatomic particle has almost no mass relative to the others: the proton, the neutron or the electron?​

Answers

Answer:

electron

Explanation:

it has very little mass

FeO+ PdF2 ---> FeF2+PdO balance please worth 50 points

Answers

Answer: FeO

Explanation:

Answer:

This is not worth 50 points liar

Explanation:

In metallic bonding, the electrons A. are unable to move. B. are shared between two single atoms. C. are given to one atom by another atom. D. are in a "sea" around the protons of all the metal atoms.

Answers

Answer: I think it’s A.

Explanation:

Tell me if it’s wrong sorry, I am only in middle school level science.

What is nuclear fusion what role does it play in the sun

Answers

Answer:

Nuclear fusion is when two atomic nuclei combine and form one nucleus. Nuclear fusion generates all of the Sun's energy. Inward pulling by the Sun's gravity is counteracted by outward pushing by the Sun's nuclear fusion; this balance keeps the sun from collapsing or exploding.

Explanation:

Answer:

it converts mass into energy and hydrogen into helium.

Explanation:

Nuclear fusion, the source of all the energy so generously radiated by the Sun

Enter a numerical expression that represents the sum of u squared and 9, multiplied by eleven

Answers

Answer:

 11(u²  + 9)

Explanation:

The problem is to write a numerical expression for the statement given;

       sum of u squared and 9, multiplied by eleven

Variable given  = u;

             u squared = u²

         Sum;

                     u²  + 9

    multiplied by 11;

                     11(u²  + 9)

What is the mass of 8.8 x 10^22 of magnesium

Answers

Answer:

0.05

moles

Explanation:

In a mole of any substance, there exist

6.02⋅1023

units of that substance.

So here, we got:

3.01⋅1022Mg atoms⋅1mol6.02⋅1023M gatoms=0.05mol

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