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Lena [83]
3 years ago
7

Can someone please help me

Chemistry
2 answers:
xenn [34]3 years ago
5 0
Gold

___________________
asambeis [7]3 years ago
4 0

Answer:

<h2><em>Gold</em></h2>

Explanation:

<h2><em>A single atom of silver has a total of 47 protons and electrons and 61 neutrons. ... Therefore, gold has a density of 19.32 g/cm3 whereas silver has a density of only 10.49 g/cm3. Thus, a 1 oz bar of gold will be almost half as large as a 1 oz bar of silver</em></h2>
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A certain element X is comprised of isotopes A, B, and C. Isotope A has a mass of 50 amu and is 70% of naturally occurring X. Is
Ivahew [28]

Answer:

47 g/mol

Explanation:

0.70 (50 amu) + 0.25 (35 amu) + 0.05 (70 amu) = 47 amu = 47 g/mol

Explanation:

7 0
4 years ago
2KI - 2K + 12
Troyanec [42]

Answer:

The answer to your question is 3.5 moles of I₂    

Explanation:

Data

moles of I₂ = ?

moles of KI = 7

Balanced chemical reaction

                2KI  ⇒   2K  +  I₂

Process

To solve this problem use proportions and cross multiplication. Use the coefficients of the balanced chemical reaction for this proportion.

                2 moles of KI --------------------- 1 mol of I₂

                7 moles of KI  --------------------  x

                    x = (7 x 1) / 2

-Simplifying

                    x = 7/2

-Result

                   x = 3.5 moles of I₂        

4 0
3 years ago
What is acide, Base and salt​
ss7ja [257]

Answer:

In acid – base chemistry, salts are ionic compounds that result from the neutralization reaction of an acid and a base. Basic salts contain the conjugate base of a weak acid, so when they dissolve in water, they react with water to yield a solution with pH greater than 7.0.

Explanation:

Hope this helped!

4 0
3 years ago
What postulate of the kinetic molecular theory best explains why gases have high fluidity? because collisions between gas partic
slavikrds [6]

the elasticity of gas particle collisions, there is no energy loss when the particles pass one another. Gases are composed of a very large number of small particles, which spread out and avoid contact with one another.

<h3>Which of the following gas postulates from the kinetic molecular theory best explains why pressure exists in gases?</h3>

As the quantity of gas particles in the container rises, so does the frequency of wall interactions and subsequently the pressure of the gas. The average kinetic energy of a gas particle is exclusively dependent on the temperature of the gas, says the theory's final postulate. As the volume of gas particles inside the container grows, more of them will collide with the walls, increasing the pressure and the frequency of collisions.

Learn more about kinetic energy here:

brainly.com/question/26472013

#SPJ4

3 0
2 years ago
PLEASE HELP. !!
scoray [572]

Answer:

Potential energy = 441 N

Explanation:

Given:

Mass M = 15 kg

Height = 3 m

Find:

Potential energy

Computation:

Potential energy = mgh

Potential energy = (15)(9.8)(3)

Potential energy = 441 N

8 0
3 years ago
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