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liq [111]
3 years ago
15

How dose the atomic mass and atomic number compare for helium

Physics
2 answers:
irga5000 [103]3 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]3 years ago
6 0

Answer: The atomic mass is greater.

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

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The study of the inorganic world.

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Explain how high-pressure and low pressure systems are different
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Low pressure has a bit less of a function than high pressure, high pressure is more useful in certain terms
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Please, what is a car battery pH?
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3 years ago
A battery charger can produce 3A at 12 Volt and charges a battery fer 2 hr. Calculate work in KJ.
Oksi-84 [34.3K]

Answer: 259.2 KJ

Explanation:

The formula calculate work don in a circuit is given by :-

W=QV, where Q is charge and V is the potential difference.

The formula to calculate charge in circuit :-

Q=It, where I is current and t is time.

Given : Current : I=3A

Potential difference : V=12\ V

Time : t=2\ hr=2(3600)\text{ seconds}=7200\text{ seconds}

Now, Q=3(7200)=21,600\ C

Then,  W=(21600)(12)=259,200\text{ Joules}=259.2\text{ KJ}

Hence, the work done = 259.2 KJ

4 0
2 years ago
Consider eight,eight-cubic centimeter (8 cm3) sugar cubes stacked so that they form a single 2 x 2 x 2 cube. How does the surfac
In-s [12.5K]
To find the surface area of a single cube we first nees to take the cube root of 8cm3 which is 2.

Now we know that the length of each side is 2 and we can find the area of one side by doing 2x2 which is 4.

To find the total surface area of one cube we do 4 times 6 side giving us a total of 24cm2.

To find the total surface area of the 8 individual cubes, we multiply 24cm2 by 8 to give us a total of 192cm2.

Now to find the total surface area of the one large cube, we know that each side of one of the small cubes is 4cm2 and the large cube is set up so that there are two levels of four cubes right on top of each other. So, the total area of each side of the large cube is 4cm2 times 4 which gives us 16cm2.

Then we multiply 16cm2 by 6 sides to give us a total surface area of 96cm2.

The ratio of the surface area of the single large cube comapred to the total surface area of the single cubes is 96:192

We can further simplify this ratio:

96:192

48:96

24:48

12:24

6:12

3:6

1:2
5 0
2 years ago
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