CHEMISTRY HIGH SCHOOL

8 Which quantity is equal to one mole of Au?(1) the atomic mass in grams(2) the atomic number in grams
(3) the mass of neutrons in grams
(4) the number of neutrons in grams

Answers

Answer 1

Answer: Answer is (1) the atomic mass in grams since One mole of any element is equal to the atomic mass in grams.

Answer 2

Answer:

Answer: option (1) the atomic mass in grams.

Explanation:

1) The atomic mass is the mass in grams of one mole of atoms.

2) Hence, it is always the atomic mass of an element equal to the mass of one mole of atoms of such element. Therefore, the atomic mass of Au is the mass of one moles of atoms of Au.

3) Here are some examples:

i) Atomic mass of gold: 196.67 g/atoms, means that 196.97 grams of Au is one mole of Au.

ii) Atomic mass of hydrogen: 1.008 g/mol, means that 1.008 grams of H is one mole of H.

iii) Atomic mass of oxygen: 15.999 g/mol, means that 15.999 grams of O is one mole of O.

iv) Atomic mass of lead: 207.2 g/mol, means that 207.2 grams of Pb is one mole of Pb.

Now you see it, the atomic mass in grams of an element is equal to one mole of the element.

Related Questions

Write briefly on scientific method
A gas absorbs 3.4 kJ of heat and does 1.9 kJ of work. Calculate ΔE
Which is greater the area of a red plate diner has a radius of 6 cm or the area of two yellow plate with a radius of 3 cm each
Although incineration can break down harmful chemicals, the byproduct is hazardous.a. True b. False
How many moles of chlorine, cl, are there in 8 moles of carbon tetrachloride, ccl4?

out of barium, chlorine, iodine, and strontium which atom has the strongest attraction for electrons in a bond formation?

Answers

Out of the choices given, the correct answer would be chlorine. It is the atom with the strongest attraction for electrons in a bond formation. This is because it has the highest electronegativity among the choices.

Identify whether the following is an example of qualitative or quantitative data. the taste of an apple:

Answers

In this item we are to identify if the taste of an apple is a qualitative or a quantitative data. In reporting the taste of an apple, we usually do not use some scale or anything but we are only describing the taste. Thus, it is a qualitative data.

Data can be broadly divided into two types. Quantitative data is made up of numbers. Qualitative data is made up of descriptions. In this case, the taste of an apple is an example of qualitative data since it does not involve numbers but instead a description.

What is a system and how is it used

Answers

Simply put, a system is an organized collection of parts (or subsystems) that are highly integrated to accomplish an overall goal. The system has various inputs, which go through certain processes to produce certain outputs, which together, accomplish the overall desired goal for the system. A system is a collection of elements or components that are organized for a common purpose. The word sometimes describes the organization or plan itself (and is similar in meaning to method, as in "I have my own little system") and sometimes describes the parts in the system (as in "computer system"). A system is a group of interacting or interrelated entities that form a unified whole. A system, surrounded and influenced by its environment, is described by its boundaries, structure and purpose and expressed in its functioning. Systems are the subjects of study of systems theory. The term "system" comes from the Latin word systēma, in turn from Greek σύστημα systēma: "whole concept made of several parts or members, system", literary "composition".

Una muestra contiene 160 g de bromo y 2 g de hidrógeno. Otra muestra de bromuro de un metal contiene 4 g de bromuro y 1 g de metal. Halla el peso equivalente del metal.

Answers

Answer:

$x = 40\,g$

Explanation:

El peso equivalente del metal se calcula por regla de tres simple:

$x = \left((160\,g\,Br)/(4\,g\,Br)\right)\cdot (1\,g)$

$x = 40\,g$

Answer:

El peso equivalente del metal es 1/20 g

Explanation:

Una muestra contiene 160 g de bromo y 2 g de hidrógeno. Otra muestra de bromuro metálico contiene 4 g de bromuro y 1 g de metal. Encuentra el peso equivalente del metal

Aquí tenemos la primera muestra que tiene la relación de bromo a hidrógeno de 160 g de bromo a 2 g de hidrógeno.

Eso es 160 g de bromo está presente con 2 g de hidrógeno

Dividiendo la combinación anterior por 160 para encontrar la cantidad de hidrógeno que se combina con 1 g de bromo, tenemos

(160 g) / 160 de bromo está presente con (2 g) / 160 de hidrógeno

1 g de bromo está presente con 1/80 g de hidrógeno

Por lo tanto, 4 g de bromo están presentes con 4/80 g de hidrógeno o tenemos;

4 g de bromo están presentes con 1/20 g de hidrógeno

Por lo tanto, el peso equivalente del metal = 1/20 g.

A given sample of oxygen occupies 500 mL when the pressure is 800 mmHg. What volume will the gas occupy at 200 mmHg, provided the temperature remains constant?

Answers

Answer:

The volume of the gas at 200 mmHg will be 2 L.

Explanation:

As the volume increases, the gas particles (atoms or molecules) take longer to reach the walls of the container and therefore collide with them fewer times per unit of time. This means that the pressure will be lower because it represents the frequency of collisions of the gas against the walls. In this way pressure and volume are related, determining Boyle's law which says:

"The volume occupied by a certain gaseous mass at constant temperature is inversely proportional to pressure"

Boyle's law is expressed mathematically as:

P * V = k

Now it is possible to assume that you have a certain volume of gas V1 that is at a pressure P1 at the beginning of the experiment. If you vary the volume of gas to a new value V2, then the pressure will change to P2, and it will be fulfilled:

P1 * V1 = P2 * V2

In this case:

P1= 800 mmHg
V1= 500 mL
P2= 200 mmHg
V2= ?

Replacing:

800 mmHg* 500 mL= 200 mmHg* V2

Solving:

$V2=(800 mmHg* 500 mL)/(200 mmHg)$

V2= 2,000 mL= 2 L (being 1,000 mL=1 L)

The volume of the gas at 200 mmHg will be 2 L.

A solution containing HCl would likely have

Answers

A) high ph and low ph

B) low and high ph

c) high and high ph

D) low and low ph

its b

Final answer:

A solution containing HCl, or Hydrochloric Acid, would likely have a low pH due to its acidic nature which greatly increases the amount of Hydronium ions in the solution and thus lowers the pH often below 7.

Explanation:

A solution containing HCl, or Hydrochloric Acid, would likely have a low pH. The pH scale measures how acidic or basic a substance is. It ranges from 0 to 14 with 7 as neutral. Since HCl is a strong acid, it will greatly increase the amount of Hydronium ions (H₃O⁺) in the solution, thus making the pH of the solution low, often below 7.