CHEMISTRY HIGH SCHOOL

An uncharged atom of gold has an atomic number of 79 and an atomic mass of 179. this atom has ________ protons, ______________ neutrons and ____________electrons

Answers

Answer 1
Answer: Get more points that we handpicked for you...

Related Questions

HIGH SCHOOL

Would the two as yet undiscovered elements A+1 and D+2 react?

Answers

Answer: No, the given elements will not react.

Explanation:

Ionic bond is defined as the bond which is formed from the complete transfer of electrons from one atom to another atom. The atom which looses electrons is known as electropositive atom and it attains positive charge. The atom which gains electrons is known as electronegative atom and it attains negative charge. For Example: KBr

Covalent bond is defined as the bond which is formed by the sharing of electrons between the atoms forming a bond. No ions are present in the compound. For Example: HCl

We are given, two elements with their oxidation states:

As, both the ions are positive ion and thus, will not react to form any compound because like charges repel each other.

Hence, no, the given elements will not react.

The best answer is no bc the question ask "Would the two as yet undiscovered element A+1 and D+2" don't sound right


HIGH SCHOOL

How do you calculate the number of moles of an element from a given mole quantity of a compound, using the chemical formula?​

Answers

Answer:

Multiply the given mole quantity by the ratio of the moles from the chemical formula (moles of desire / moles of given in the formula) x moles given

Explanation:

COLLEGE

State the definition of the partial molar Gibbs energy.

Answers

Explanation :

As we know that the Gibbs free energy is not only function of temperature and pressure but also amount of each substance in the system.

where,

is the amount of component 1 and 2 in the system.

Partial molar Gibbs free energy : The partial derivative of Gibbs free energy with respect to amount of component (i) of a mixture when other variable are kept constant are known as partial molar Gibbs free energy of component.

For a substance in a mixture, the chemical potential is defined as the partial molar Gibbs free energy.

The expression will be:

where,

T = temperature

P = pressure

is the amount of component 'i' and 'j' in the system.

HIGH SCHOOL

PLEASE HELP ME! Explain why, no matter how much we dilute an acid with water, the pH never rises above 7.

Answers

As water has a neutral pH of 7, diluting an acid water does not raise it's pH above 7.

What is an acid?

Acids are defined as substances which on dissociation yield H+ ions , and these substances are sour in taste. Compounds such as HCl, H₂SO₄ and HNO₃ are acids as they yield H+ ions on dissociation.

According to the number of H+ ions which are generated on dissociation acids are classified as mono-protic , di-protic ,tri-protic and polyprotic  acids  depending on the number of protons which are liberated on dissociation.

Acids are widely used in industries  for  production of fertilizers, detergents  batteries and dyes.They are used in chemical industries for production of chemical compounds like salts which are produced by neutralization reactions.

Learn more about acids,here:

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The pH scale is used to measure the degree of acidity or alkalinity of a solution. The scale runs from 0 (very acidic solutions can have a negative pH) to 14 (very alkaline solutions can have a pH higher than this), while a neutral liquid such as pure water has a pH of 7. The pH is linked to the concentration of hydrogen ions (H +) in the solution. Diluting an acid or alkali affects the concentration of H + ions in a solution and therefore affects the pH. In this activity, we will investigate how diluting an acid or alkali affects the pH.
Hope this helps:D
Have a great rest of a brainly day!
MIDDLE SCHOOL

Which of these is a small, icy object that orbits the sun. a) star

b) meteoroid

c) comet

d) asteroid

WILL GIVE BRAINLIEST!

Answers

The small, icy object that orbits the sun will be comet.

What is comet?

Comets orbit the sun like cosmic snowballs of iced gas, rock, as well as dust. They are just the size of a sizable town when frozen. When a comet approaches the sun, it warms up as well as spews dust as well as gases into a massive blazing head the size of most planets.

What is orbits?

An orbit is just the path that its object in space follows around another thing on a regular, repeated basis. A satellite is a spacecraft that is in orbit. A natural satellite, such as the earth or even the moon, could be created.

The small, icy object that orbits the sun will be comet.

Therefore, correct answer will be option (C).

To know more about comet and orbits.

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I believe those are Comets
HIGH SCHOOL

KF is a strong electrolyte, & HF is a weak electrolyte. How are they different?

Answers

The strong electrolyte KF completely dissociates into K+ and F- ions when it dissolves in water. When the weak electrolyte HF dissolves in water, there are a few ions of H+ and F- present, but mostly dissolved HF molecules. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

MIDDLE SCHOOL

What is the pressure of 1.20 moles of SO2 gas in a 4L container at 30 degrees celsius

Answers

Let suppose the Gas is acting Ideally, Then According to Ideal Gas Equation,

                                       P V  =  n R T
Solving for P,
                                       P  =  n R T / V     ----- (1)
Data Given;

Moles  = n = 1.20 mol

Volume  = V =  4 L

Temperature  = T = 30 + 273 = 303 K

Gas Constant  = R = 0.08206 atm.L.mol⁻¹.K⁻¹

Putting Values in Eq.1,

                     P  =  (1.20 mol × 0.08206 atm.L.mol⁻¹.K⁻¹ × 303 K) ÷ 4 L

                     P  =  7.45 atm

Answer:

7.45 atm

Explanation:

Let suppose the Gas is acting Ideally, Then According to Ideal Gas Equation,

                                      P V  =  n R T

Solving for P,

                                      P  =  n R T / V     ----- (1)

Data Given;

Moles  = n = 1.20 mol

Volume  = V =  4 L

Temperature  = T = 30 + 273 = 303 K

Gas Constant  = R = 0.08206 atm.L.mol⁻¹.K⁻¹

Putting Values in Eq.1,

                    P  =  (1.20 mol × 0.08206 atm.L.mol⁻¹.K⁻¹ × 303 K) ÷ 4 L

                    P  =  7.45 atm

MIDDLE SCHOOL

Definition: this is information from an experiment that can be assigned a number or a quantity and can often be used to construct a graph. please answer correctly

Answers

Answer:

Quantitative Data

Explanation:

The answer is “data”
COLLEGE

Determine the ph of a 0.22 m naf solution at 25°c. the ka of hf is 3.5 × 10-5.

Answers

When NaF is in aqueous solution it dissociates into ions and reacts with water forming NaOH and HF. The solution would be a mixture of a strong base and a weak acid. Both of these substances contribute to the pH of the solution. We calculate pH as follows:

Ka + Kb = 1x10^-14
Kb = 1x10^-14 - 3.5x 10 ^-5
Kb = 6.5 x10^-5Kb = [Na+] [OH-] / [NaF]

We let x be the concentration of Na in equilbrium,

Kb = (x) (x) /0.22
6.5 x10^-5 = x^2 /0.22
x = 3.78x10^-3 = [OH]pOH = -log [OH]
pOH = 2.42

pH + pOH = 14
pH = 14 - pOH 
pH = 14 - 2.42 
pH = 11.58

Therefore, the pH of the solution would be 11.58.

Answer: pH= 8.90

Explanation:

Random Questions
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