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4 years ago

What is the molar mass, in grams, of a mole of an element equal to?

Physics

2 answers:

Stels [109]4 years ago

8 0

The correct answer is B. The atomic weight of the element

borishaifa [10]4 years ago

4 0

Answer : Molar mass is equal to the atomic weight of the element.

Explanation :

The ratio of the mass of a given substance to the amount of substance is called as the molar mass of that substance. It is denoted by M. Its SI unit is kg/mol but it is usually expressed in g/mol.

In simpler form it is equal to the atomic weight of the substance.

For example, the molar mass of water can be calculated as :

$M=2\times 1+2(8)=18\ g/mol$

Hence, the correct option is (B) "The atomic weight of the element".

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A speaker generates a continuous tone of 440 Hz. In the drawing, sound travels into a tube that splits into two segments, one lo

chubhunter [2.5K]

Answer:

The minimum difference between the lengths of the two tubes should be 0.385 meters.

Explanation:

As we known that for any two waves to arrive in phase at any point the difference in the path traveled by the waves should be an integral multiple of the wavelength of the wave.

Mathematically we can write:

$\Delta x=n\frac{\lambda }{2}$

For the given wave we have

$\lambda =\frac{v}{\nu }$

Applying values we get

$\lambda =\frac{339}{440 }=0.77m$

Thus the minimum difference in the lengths of the tubes can be obtained by putting the value of n = 1

$\therefore \Delta x=1\times \frac{0.77}{2}=0.385m$

7 0

4 years ago

A ball that occupies 20cm^3 of space is half submerged, very gently, in a full glass of water. How much volume of water spills o

egoroff_w [7]

Answer:

Spills out 10cm³ of wather.

Explanation:

The ball being submerged halfway in the full glass of water will spill a volume of water equal to the volume of the ball that is being submerged, because the entire volume of the submerged ball was previously occupied by water and is not compressed should move out of the glass.This volume will be 10cm³ since the total of the ball is 20cm³ and it is submerged halfway.

8 0

3 years ago

A 60-kg person is traveling in a car moving at 16 m/s, when the car hits a barrier. The person is not wearing a seat belt, but i

marin [14]

Using conservation of momentum, we can solve for the force that the air bag exerts on the person.

Recall the equation for momentum (p):

$p = mv = F*dt$

We can solve for total momentum, then divide by out time interval. This gets us:

$(60kg)(16m/s) = F(0.2s)


F = 4800N$

F = 4800N

4 0

3 years ago

A large group of people get together. each one rolls a die 180 times, and counts the number of 1's. about what percentage of the

Arte-miy333 [17]

<span>Around 99% - 100%. This is because a die is six sided, which gives the odds of a one coming up being roughly 17% independent of every roll. 17% of 180 trials comes out to 30-31 times a one will show up every 180 trials. This puts you right in the middle of the 15-45 range which means that somebody will almost ALWAYS reach 15-45 one's in a trial of 180 rolls.</span>

5 0

3 years ago

1. What outdoor activities do you prefer? Why? 2. What outdoor activities are you interested in, but have never tried?

DochEvi [55]

Answer:

My favorate activies is skateboareding, and I prerfer outdoor actives.

Explanation:

3 0

3 years ago