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3 years ago

Is the following sentence true or false? Two atoms of the same element can have different numbers of protons.

Physics

1 answer:

pickupchik [31]3 years ago

4 0

Two atoms of the same element can have different numbers of protons

false

diff nos neutrons ... isotopes,

diff protons ... diff elements

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When are you most aware of your motion in a moving vehicle: when it is moving steadily in a straight line or when it is accelera

jenyasd209 [6]

Answer:

A) Accelerating. You would not be aware of the motion if you did not look outside the car

Explanation:

Since human cannot sense the motion (unless visually), but the inertia force caused due to the acceleration of the motion. So if you are in a car with constant velocity, there's no acceleration and no inertia force, you would not be able to sense the motion at all unless you look outside.

3 0

2 years ago

One mole of an unknown sample contains 120 g of carbon and 30.3 g of

barxatty [35]

atomic mass of carbon is C = 12 g/mol

atomic mass of hydrogen is H = 1 g/mol

now number of carbon atoms

$N_c = \frac{120}{12} = 10$

Similarly the number of hydrogen atoms are

$N_H = \frac{30.3}{1} = 30$

so Carbon atom and hydrogen atom must be in ratio of 10:30

so the ratio is 1:3

now the empirical formula is always in simplest form

$CH_3$

5 0

2 years ago

Two identical metal spheres a and b are connected by a plastic rod. both are initially neutral. 1.0×1012 electrons are added to

Ann [662]

The plastic rod is made of insulator (plastic), so it does not allow charges moving from one sphere to another. This means that all the electrons given to sphere A will remain on sphere A.

The number of electrons initially given to sphere A is $N=1.0 \cdot 10^{12}$ , and since the charge of 1 electron is $e=-1.6 \cdot 10^{-19} C$ , the net charge left on sphere A after the removal of the rod will be
$Q=N e = 1.0 \cdot 10^{12}(-1.6 \cdot 10^{-19} C)=-1.6.0 \cdot 10^{-7} C$

8 0

3 years ago

Read 2 more answers

1 At current rates of use, known supplies of oil and natural gas may run out in less than _____ years. (1 point)

Aliun [14]

1. At current rates of use, known supplies of oil and natural gas may run out in less than 100 years.
2. The country is
United States
3. These are examples of
non-renewable resources
4. These resources are called
fossil fuels
5. To supply energy needs in the future,
renewable energy sources are being developed.

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3 years ago

The formation of a new substance shows that what change occurs

ycow [4]

A chemical change might also result in the formation of a precipitate, such as the appearance of a cloudy material when dissolved substances are mixed. Rotting, burning, cooking, and rusting are all further types of chemical changes because they produce substances that are entirely new chemical compounds.

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3 years ago