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SVETLANKA909090 [29]

3 years ago

12

what charge does the proton give to the nucleus? a. positive b. negative c. positive or negative, depending on the number of ele

ctrons d. neither since the nucleus does not carry a charge, only atoms do

2 answers:

Tema [17]3 years ago

7 0

Positive charge the proton give to the nucleus center of an atom

a_sh-v [17]3 years ago

5 0

A. Positive i believe it is

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vovangra [49]

Diabetes, ALS, and Alzheimeir's.

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3 years ago

What do scientists call an orderly pattern of change over time

Ulleksa [173]

ecological. i hope this helps!!!!

4 0

2 years ago

What is the volume of a substance that has a density of 13.6 g/cm and a mass of 3.0 g?

MakcuM [25]

Answer:

$\boxed {\boxed {\sf v \approx 0.22 \ cm^3}}$

Explanation:

We are asked to find the volume of a substance.

We are given the density and the mass. The density of a substance is its mass per unit volume. The formula for calculating density is:

$\rho= \frac{m}{v}$

We know the density of the substance is 13.6 grams per cubic centimeter and the mass is 3.0 grams.

ρ= 13.6 g/cm³
m= 3.0 g

Substitute these values into the formula.

$13.6 \ g/cm^3= \frac{3.0 \ g }{v}$

We are solving for the volume, so we must isolate the variable v. First, cross multiply. Multiply the first numerator by the second denominator, then multiply the first denominator by the second numerator.

$\frac{13.6 \ g/cm^3}{1}= \frac{3.0 \ g }{v}$

$13.6 \ g/cm^3 *v =3.0 \ g *1$

Multiply on the right side of the equation.

$13.6 \ g/cm^3 *v =3.0 \ g$

The variable is being multiplied by 13.6 grams per cubic centimeters. The inverse operation of multiplication is division, so we divide both sides of the equation by 13.6 g/cm².

$\frac {13.6 \ g/cm^3 *v}{13.6 \ g/cm^3} =\frac{3.0 \ g }{13.6 \ g/cm^3}$

$v =\frac{3.0 \ g }{13.6 \ g/cm^3}$

The units of grams cancel.

$v =\frac{3.0 }{13.6 \ cm^3}$

$v= 0.2205882353 \ cm^3$

The original measurement of density has 3 significant figures and the measurement of mass has 2. Our answer must have the least number of sig figs, which is 2. For the number we found, that is the hundredth place. The 0 in the thousandth place tells us to leave the 2 in the hundredth place.

$v \approx 0.22 \ cm^3$

The volume of the substance is approximately <u>0.22 cubic centimeters.</u>

6 0

3 years ago

Calculate the rms speed of co molecules at 320 k .

mezya [45]

<span>rms = (3RT/M)^1/2 Therefore, the rms of CO is: rms(CO) = [(3)(8.3145 J/mol*K)(320 K)/(0.028 kg/mol)]^1/2 rms = [2.65x10^5 m^2/s^2]^1/2 rms = 533.9181 m/s</span>

8 0

3 years ago

Which equation correctly represents the electron affinity of the cesium atom? Cs (g) Cs1 (g)+2 e Cs+1 (g) Cs (g) + 1e Cs (g) OCs

DENIUS [597]

Answer : The correction equation will be:

$Cs^+(g)+1e^-\rightarrow Cs(g)$

Explanation :

Electron affinity : It is defined as the addition of electron to the atom or to the ion. The atom or ion is always in gaseous phase.

In other words we can say that, the gaining of electrons is said to be an electron affinity.

As, the given element is a metal given in cationic form, so its positive ion will gain an electron to form a neutral atom.

The balanced and correct equation for electron affinity of the cesium ion will be:

$Cs^+(g)+1e^-\rightarrow Cs(g)$

4 0

3 years ago

Read 2 more answers