3 years ago

What is the atomic mass of silicon

2 answers:

7 0

The atomic number of Silicon is 14. So there are 14 protons in the nucleus of every Silicon atom. But that's not the mass. Besides the protons, there are also some neutrons, and the atomic mass of the atom is the total number of (protons + neutrons) in its nucleus.

The number of neutrons is not the same in every Silicon atom. There are 3 stable isotopes of Silicon. A Silicon nucleus can have 14, 15 or 16 neutrons.

So an atom of Silicon can have an atomic mass of <em>28, 29, or 30</em>.

emmainna [20.7K]3 years ago

5 0

<h2>The atomic mass of silicon is 28.0855</h2>

You might be interested in

Keeping in mind the kinetic energy of a moving vehicle, how can a driver best prepare to enter sharp curves in the roadway

777dan777 [17]

Gradually slow down to a safe speed well before entering the curve.

8 0

3 years ago

Read 2 more answers

Whenever an object is moving at a constant rate, the value(s) that equal zero is (are):

dolphi86 [110]

Answer:

d) all of the above

Explanation:

the speed, velocity, and acceleration all changes to 0 due to no motion.

5 0

3 years ago

Read 2 more answers

A sphere has surface area 1.25 m2, emissivity 1.0, and temperature 100.0°C. What is the rate at which it radiates heat into empt

Yuri [45]

The total power emitted by an object via radiation is:
$P=A\epsilon \sigma T^4$
where:
A is the surface of the object (in our problem, $A=1.25 m^2$
$\epsilon$ is the emissivity of the object (in our problem, $\epsilon=1$ )
$\sigma = 5.67 \cdot 10^{-8} W/(m^2 K^4)$ is the Stefan-Boltzmann constant
T is the absolute temperature of the object, which in our case is $T=100^{\circ} C=373 K$

Substituting these values, we find the power emitted by radiation:
$P=(1.25 m^2)(1.0)(5.67 \cdot 10^{-8}W/(m^2K^4)})(373 K)^4=1371 W = 1.4 kW$
So, the correct answer is D.

6 0

3 years ago

A bullet travels at 850 m/s. how long will it take a bullet to go 1 km?

Dmitrij [34]

The speed of bullet =
850 m/s

Distance given = 1 km = 1000m

S = D/t
t • S = D/t • t
St = D
St/S = D/S
t = D/S
t = 1000m/850m/s
t = 1.176 s

It will take the bullet 1.176 or about 1.18 seconds to go 1 km.

8 0

3 years ago

HELP ME PLEASE URGENT WILL MARK AND 5 STARS

Artist 52 [7]

Answer:

option (B) is the correct option.

please thanks me and follow me

7 0

3 years ago