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Maru [420]
3 years ago
11

ASAP MULTIPLE CHOICE WILL MARK BRAINLIEST

Chemistry
1 answer:
yaroslaw [1]3 years ago
6 0

Answer:

There are four electrons

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12) A 17.92 g sample of copper was submerged in water, and the volume reading rose by 2.00 mL. What is the density of the copper
emmasim [6.3K]

Hey there!:

Mass = 17.92 g

Volume = 2.00 mL

Density =  ??

Therefore:

D = m / V

D = 17.92 / 2.00

D = 8.96 g/mL

Hope this helps!

3 0
3 years ago
1. A Satellite's velocity is 30,000 m/s after one minute, It is 15,000 m/s. What is the Satellite's acceleration ?​
ira [324]

Answer: i don't know

Explanation:

6 0
3 years ago
Explain why the quantum number set (2, 2, -1, -½) is not possible for an electron in an atom.
rosijanka [135]

Answer is: it is not possible, because orbital (azimunthal) quantum number cannot be 2.

The principal quantum number (n) is one of four quantum numbers which are assigned to each electron in an atom to describe that electron's state.

For principal quantum number n=2:

1) azimuthal quantum number (l) can be l = 0...n-1:

l = 0, 1.  

The azimuthal quantum number determines its orbital angular momentum and describes the shape of the orbital.  

2) magnetic quantum number (ml) can be ml = -l...+l.

ml = -1, 0, +1.

Magnetic quantum number specify orientation of electrons in magnetic field and number of electron states (orbitals) in subshells.

3) the spin quantum number (ms), is the spin of the electron.

ms = +1/2, -1/2.

8 0
4 years ago
A powder sample weighing 250 g and having a surface area of 1 m2/g is dispersed in 1 L of water. After 10 minutes, 0.4 g of the
lisabon 2012 [21]

Answer:

a)

K = 2.64 * 10^{-8}

b)

15 \frac{5}{8} hours

Explanation:

Given

Surface Area (S) of 250 grams of powder sample = 250 square meter.

S = 2500000 square centimeter

V\frac{dC}{dT} = 0.40 grams/minute

V\frac{dC}{dT} = \frac{dM}{dT} = \frac{0.40*60}{10} = 0.66 mg per second

C_s = 0.01 gram per cubic meter = 10 mg/ml

a)

\frac{dM}{dT} = K SC_s

0.66 =  K* 2500000* 10\\

K = 2.64 * 10^{-8} cm /sec

b) Time taken

Time taken to sink

\frac{10*60}{0.4} * 37.5  = 56,250

Time in hours

15 \frac{5}{8} hours

6 0
3 years ago
What is the definition of bond?
JulijaS [17]
Join or be joined securely to something else, typically by means of an adhesive substance, heat, or pressure.
3 0
3 years ago
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