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liq [111]
4 years ago
15

How dose the atomic mass and atomic number compare for helium

Physics
2 answers:
irga5000 [103]4 years ago
6 0
A ... No. Every element has an Atomic Number.

Helium's Atomic Number is 2.
It's Atomic Mass is 4.

B ... No. This isn't true for ANY element.

C ... Yes. This is true for EVERY element except Hydrogen.

D ... No. This is true for ONLY Hydrogen.
raketka [301]4 years ago
6 0

Answer: The atomic mass is greater.

Explanation: I took the quiz on K12 and got 100%

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Oxana [17]

Answer:

           

Explanation:

5 0
3 years ago
A sample of a gas (5.0 mol) at 1.0 atm is expanded at constant temperature from 10 L to 15 L. The final pressure is __________ a
cupoosta [38]

Answer:

The final pressure will be 0.67 atm.

Explanation:

Using Boyle's law  

{P_1}\times {V_1}={P_2}\times {V_2}

Given ,  

V₁ = 10 L

V₂ = 15 L

P₁ = 1.0 atm

P₂ = ?

Using above equation as:

{P_1}\times {V_1}={P_2}\times {V_2}

{1.0}\times {10}={P_2}\times {15} atm

{P_2}=\frac{{1.0}\times {10}}{15} atm

{P_2}=0.67\ atm

<u>The final pressure will be 0.67 atm.</u>

8 0
3 years ago
HELP PLS !!! <br><br> Calculate the total current drawn from the 9-volt battery
cricket20 [7]

Answer:

0.82A

Explanation:

first we resolve the resistors in parallel

i.e 1/R=1/R1+1/R2

=1/R=1/6+1/3

1/R=1/2

R=2/1=2ohms

now we resolve all resistors in series

R=R1+R2+R3

R=6+3+2(the two parallel resistors we resolved are now in series with the others)

R=11ohms

From ohm's law V=IR

I=V/R=9/11= 0.82A.

6 0
2 years ago
What does personal mission statement?
KonstantinChe [14]

Answer:

<em>A personal mission statement defines who you are as a person (or as a team member where you work) and identifies your purpose, whether that's in the office or simply in life. </em>

Explanation:

<em>It explains how you aim to pursue that purpose, and why it matters so much to you.</em>

3 0
2 years ago
Sharon wants to rearrange the furniture in her room. How much work will she do if she used 20 N of force to move a 50 kg chest a
Shalnov [3]

Answer:

B

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W = Fd

W = 20N x 15m

W = 300 Nm

W = 300 J

Nm and joule are considered the same units

8 0
3 years ago
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