CHEMISTRY HIGH SCHOOL

One isotope of a metallic element has a mass number 65 and 35 neutrons in the nucleus. The cation derived from the isotope has 28 electrons. What is the charge of this cation?

Answers

Answer 1

Answer:

Answer:

Explanation:

The proton no. of this element is 65-35=30

Since there are 30 protons and 28 electrons, the net charge is 2+

Related Questions

The amount of heat transferred from an object depends on all of the following exceptA. the specific heat of the object. B. the change in temperature the object undergoes. C. the initial amount of Calories in the object. D. the mass of the object.
To show the electron configuration for an atom, when would it be better to use an orbital notation than to use a written configuration with numbers, letters, and superscripts? when the aim is to show orbital shapes in subshells when the aim is to show electron distributions in shells
Use the periodic table or graphic in lesson. Choose the correct electron configuration of carbon. 1s22s22p1 1s22s22p4 1s22s22p2 1s22s12p2
The study of all chemicals containing carbon1. Applied Chemistry 2. Bio Chemistry 3. Organic Chemistry 4. Inorganic Chemistry
Which of the following is not a result of air pollution? A. SmogB. Breathing problemsC. Global warmingD. Soil erosion

Which scientist did people think was insane so they dismissed his ideas for almost 2000 years?

Answers

Alfred Wegener

I think let me know if I am wrong

Which element in period 3 has both metallic and non metalik properties

Answers

Answer:

Siis the answer I hope this help

In which state of matter are the particles close together and highly organized? A. Solid. B. Liquid. C. Gas. D. All of the choices are correct.

Answers

Answer:

A. Solid

Explanation:

that is what creates a solid state. the particles are moving slowly enough (the matter is cold enough) that stable structures between them can be established. so, they get close together and create e.g. grids.

Required nutrients in foods that are made by other living organisms are_______

Answers

Answer: Vitamins

Explanation:

they are nutrients that are made by living things

Before arc welding was developed, a displacement reaction involving aluminum and iron(III) oxide was commonly used to produce molten iron (the thermite process). This reaction was used, for example, to connect sections of iron railroad track. Calculate the mass of molten iron produced when 2.28 kg of aluminum reacts with 17.2 mol of iron(III) oxide.

Answers

Answer: The mass of molten iron formed will be 1.92 kg

Explanation:

We are given:

Moles of iron (III) oxide = 17.2 moles

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ ......(1)

Given mass of aluminium = 2.28 kg = 2280 g (Conversion factor: 1 kg = 1000 g)

Molar mass of aluminium = 27 g/mol

Putting values in equation 1, we get:

$\text{Moles of aluminium}=(2280g)/(27g/mol)=84.44mol$

The chemical equation for the reaction of aluminium and iron (III) oxide follows:

$2Al+Fe_2O_3\rightarrow Al_2O_3+2Fe$

By Stoichiometry of the reaction:

1 mole of iron (III) oxide reacts with 2 moles of aluminium

So, 17.2 moles of iron (III) oxide will react with = $(2)/(1)* 17.2=34.4mol$ of aluminium

As, given amount of aluminium is more than the required amount. So, it is considered as an excess reagent.

Thus, iron (III) oxide is considered as a limiting reagent because it limits the formation of product.

By Stoichiometry of the reaction:

1 mole of iron (III) oxide produces 2 moles of iron

So, 17.2 moles of iron (III) oxide will produce = $(2)/(1)* 17.2=34.4mol$ of iron

Now, calculating the mass of iron by using equation 1, we get:

Molar mass of iron = 55.8 g/mol

Moles of iron = 34.4 moles

Putting values in equation 1, we get:

$34.4mol=\frac{\text{Mass of iron}}{55.8g/mol}\n\n\text{Mass of iron}=(34.4mol* 55.8g/mol)=1919.5g=1.92kg$

Hence, the mass of molten iron formed will be 1.92 kg

Which of the following notations is the correct noble gas configuration for Li

Answers

Noble gas configuration for Li : [He]2s¹

Further explanation

In an atom, there are levels of energy in the shell and sub-shell

This energy level is expressed in the form of electron configurations.

Lithium with atomic number 3, then the electron configuration:

1s²2s¹

And for noble gas configuration or it can be called Condensed electron configurations :

[He]2s¹

Answer:

[He]2s¹

Explanation:

Other Questions

The pH is a solution remains constant in the presence of a buffer if acid or base is added beyond the buffer capacity. True or false.

An object has a weight of 5.10 Newtons (N) at sea level, where the acceleration due to gravity is 9.81 m/s2.What is the acceleration due to gravity on the object of it is placed in a space ship 1,000 km above sea level, where gravity exerts a force of 3.81 N on the object. F(newtons)=m(kg) x a(m/s2) Please show work.

2. how are firefighters expected to deal with them

The discoverer of the electron was: Faraday Thomson Henry Millikan