Ammonium hydroxide is _____. an acid a base a neutral

What group of elements on the periodic table are already chemically stable?

AlladinOne [14]

Anything in group 18. These are the noble gases, known for having the stable octet in the outermost electron shell (with the exception of Helium). These elements include Neon, Xenon, and Radon, to name a few.

7 0

3 years ago

Which of the following steps correctly converts 3 moles of fluorine to an equivalent number of particles of fluorine? Divide Avo

Eva8 [605]

Answer:

Multiply 3 by Avogadro's number.

Explanation:

The mole can be defined as the amount of a substance that contains Avogadro’s number of particles, 6.02 x 10²³.

For elementary particles:

Number of particles=

number of moles x 6.02 x10²³

From the question,

Number of moles = 3moles

Number of particles = 3 x 6.02 x10²³

8 0

3 years ago

In which orbital does an electron in a bromine atom experience the greatest effective nuclear charge?

asambeis [7]

First let us determine the electronic configuration of Bromine (Br). This is written as:

Br = [Ar] 3d10 4s2 4p5

Then we must recall that the greatest effective nuclear charge (also referred to as shielding) greatly increases as distance of the orbital to the nucleus also increases. So therefore the electron in the farthest shell will experience the greatest nuclear charge hence the answer is:

4p orbital

4 0

4 years ago

Read 2 more answers

Peppa Roney works in a pizza parlor. Her job is to make the pizzas with the proper amount of toppings so that every slice has ex

posledela

Answer:

191 packages of pepperoni

Explanation:

Each pizza would have 13 slices and 15 pieces of pepperoni on each one.

(because same amount of pepperoni and olives)

13 × 15 so each pizza has 195 pieces of pepperoni

138 (number of pizzas) × 195 (pieces of pepperoni)

26910 (pieces of pepperoni) / 141 (amount in each package)

= 190.85

so 191 packages

5 0

4 years ago

At a given temperature, 3.12 atm of H2 and 5.52 atm of I2 are mixed and allowed to come to equilibrium. The equilibrium pressure

expeople1 [14]

Answer: 0.596

Explanation:

For this problem, we want to find $K_{p}$ . To do so, we will need to use the ICE chart. The I in ICE is initial quantity. In this case, it is the initial pressure. Pressure is in atm. The C in ICE is change in each quantity. The E is equilibrium.

H₂(g) + I₂(g) ⇄ 2HI(g)

I 3.12 5.52 0

C -0.869 -0.869 +1.738

E 2.251 2.251 1.738

For the steps below, refer to the ICE chart above.

1. Since we were given the initial of H₂, I₂ and equilibrium of 2HI, we can fill those into the chart.

2. Since we were not given the initial for 2HI, we will put 0 in their place.

3. For the change, we need to add pressure to the products to make the reaction reach equilibrium. We would add on the products and subtract from the reactants to equalize the reaction. Since we don't know how much the change in, we can use variable x. We know that the equilibrium of 2HI is 1.738, we know the change is 0.869 because 1.738/2=0.869. Since there are 2 moles of HI, we must divide the equilibrium by 2 to find x, so that we can fill that into the reactants side.

4. With the equilibrium values, we can find the equilibrium pressure. It is products over reactants. We use the values of E.

$K_{p} =\frac{[HI]^2}{[H_{2}][I_{2} ] }$

The [HI]² comes from 2HI. We more the moles to the exponent when we are calculating the equilibrium pressure.

$K_{p} =\frac{(1.738)^2}{(2.251)(2.251)} =0.596$

We typically don't put units because K is unitless, but know that the units is atm throughout the entire problem.

5 0

3 years ago