How many neutrons are probably in the nucleus of an element of atomic weight 197?

Classify each of the following properties of a cake as qualitative or quantitative. Give reasons for your answers

VashaNatasha [74]

Answer:

The answer to your question is below

Explanation:

A qualitative property of matter is a property characteristic of a substance like color and flavor.

A quantitative property of matter is a property when we get a number.

A) it's a circular shape is a qualitative property because the shape is a qualitative property and shape is not represented by a number.

B) its mass is 1.5 kg is a quantitative property because we know a number of this mass.

C) it tastes like chocolate is a qualitative property because the flavor is characteristic of a substance and flavor is not measured in numbers.

D) it is 30 cm in diameter it is a quantitative property, we know the exact dimension of it.

E) its icing is melting is a qualitative property, melting is a property of ice, it just happens.

4 0

4 years ago

0.448 g of an unknown diprotic acid is dissolved in about 60 mL of water in a beaker. The solution is transferred to a 100.00 mL

liq [111]

According to the Question:

We initially had 0.448 grams of the unknown diprotic acid, which was added to about 60 mL of water and that solution was added to a 100 mL flask and filled to the 100 mL mark

The above is as mentioned in the question, our 0.448 grams of diprotic acid is basically diluted to 100 mL [it's volume has been increased to 100mL]

but the amount of the acid is still the same

Which means that we now have 0.448 grams of the diprotic acid in a 100mL solution

Percent of the diprotic acid that will be present in the Erlenmeyer Flask:

From this 100 mL solution, 25 mL is transferred to the Erlenmeyer Flask

Which means that (25/100) * 100 = 25 % of the 0.448 grams of diprotic acid is present in the 25 mL sample

Mass of di-protic acid in the 25 mL solution:

Since 25% of the initial amount remains in the final solution,

Mass of the diprotic acid in the final solution = 0.448 * 0.25

Mass in the final solution = 0.112 grams

Therefore, 0.112 grams of the di-protic acid will be present in the Erlenmeyer Flask

4 0

3 years ago

Add more drink mix until you notice a color change. Have you increased or decreased the concentration? (Higher number means a hi

valina [46]

Answer:

Increased the concentration

Explanation:

Complete Question

Open the simulation by pushing the play button. Begin by dragging the concentration tester overto the liquid and add drink mix until the concentration reaches approximately 2.oo mol/L. This means there are 2.00 moles of the drink mix in 1 Liter of the solution. Add more drink mix until you notice a color change. Have you increased or decreased the concentration? (Higher number means a higher concentration).

Solution

Drink mix is basically the solute which is added to solvent i.e water.

The higher is the amount of drink mix in the solvent, the higher is the concentration of the solute and hence darker is the color of the drink.

Hence, in the case the concentration of the drink has been increased.

3 0

3 years ago

When a reaction is at equilibrium, ________.

weqwewe [10]

The answer is obviously d

3 0

3 years ago

Which scenario BEST describes how an atom produces light?

oksian1 [2.3K]

Answer:

electron loses energy as it transitions to lower energy level

Explanation:

An atom is capable of absorbing and releasing electrons. The atom of a substance is said to be at its GROUND LEVEL STATE when it contains the lowest energy level. However, when it absorbs or takes in energy, it moves to a high energy level called EXCITED STATE. This level is unstable and hence, subject to declination.

Due to the instability of the excited state of an atom, it tends to lose the absorbed electrons and in the process of doing so, it emits or produce light. Therefore, according to this question, light is produced by an atom when the electron loses energy as it transitions to lower energy level i.e excited state to ground level state.

7 0

3 years ago