HELP! HELP!<br> an element with 5 protons, and 8 electrons has an atomic number of?

Which trait will an organism that receives one dominant gene and one recessive gene most

serious [3.7K]

Answer: dominant

explanation: The dominant Gene wins because it overpowers the recessive gene.

4 0

3 years ago

Read 2 more answers

Select all the correct answers.

Kruka [31]

I think it is h20 or LiCIO3 because I tried it and I forget which one it was but I’m pretty sure it one of those

4 0

3 years ago

Read 2 more answers

Two gases helium and x are released from one end of an evacuated long cylinder at the same time if it takes helium atoms 3 times

Gemiola [76]

Answer:

Hypoflorous acid, HOF

Explanation:

From the question, we're told that the helium atoms effuses 3 times than the said gas X.

We can determine the rate of effusion by using the formula

r is inversely proportional to 1/√M, where M is the molecular mass of the gas.

And also,

r is inversely proportional to 1/t, where t is the time taken for effusion.

From both formulas I listed, we can conclude that t is directly proportional to √M. And thus we proceed.

The molecular mass of Helium is 4.

tHe = tX/3, where tx is the time taken for the unknown gas X

As of yet, we don't know the molecular mass of X. Next, we say that

tX/tHe =√Mx/MHe

3 = √Mx/4

If we square both the sides, to remove the square root, we have

9 = Mx/4

Mx = 36

The molecular mass of the unknown gas X is 36.

4 0

3 years ago

What is the name of the alkane having five carbons?

Tatiana [17]

Explanation:

Alkanes are the simple hydrocarbons that have only carbon and hydrogen atoms attached to each other through single bonds.

General chemical formula of an alkane is $C_{n}H_{2n+2}$ , where n is any integer.

For example, if n = 5 then formula of the alkane will be as follows.

$C_{n}H_{2n+2}$

= $C_{5}H_{2(5)+2}$

= $C_{5}H_{12}$

A suffix "-ane" is added in the name of an alkane. So, an alkane with five carbon atoms will be known as pentane.

7 0

3 years ago

Read 2 more answers

Which gas has approximately the same density as c2h6 at stp no nh3 h20 so2?

zmey [24]

1 mole of any gas occupy 22.4 L at STP (standard temperature and pressure, 0°C and 1 atm).

Let given gases be 1 mole. So their volumes will be the same, 22.4 liters.

Density is the ratio of mass to volume.

By formula; density= mass/volume; d=m/V

To find out masses of gases, do the mole calculation.

By formula; mole= mass/molar mass; n= m/M; m= n*M

Molar masses are calculated as
1. C₂H₆ (ethane) = 2*12 g/mol + 6*1 g/mol= 30 g/mol
2. NO (nitrogen monoxide) = 1*14 g/mol + 1*16 g/mol= 30 g/mol
3. NH₃ (ammonia) = 1*14 g/mol + 3*1 g/mol= 17 g/mol
4. H₂O (water) = 2*1 g/mol + 1*16 g/mol= 18 g/mol
5. SO₂ (sulfur dioxide) = 1*32 g/mol + 2*16 g/mol= 64 g/mol
Use Periodic Table to get atomic mass of elements.

Since their volumes are equal, compounds having the same molar mass will have the same density.
Recall the formula d= m/V.

Ethane and nitrogen monoxide have the same density.

The answer is C₂H₆ and NO.

6 0

3 years ago

HELP! HELP! an element with 5 protons, and 8 electrons has an atomic number of?