Which of the following atoms would be most likely to become a cation?a) copper
b) oxygen
c) fluorine
d) nitrogen

Answers

Answer 1

Answer:

The atom which would be most likely to become a cation is; Choice A: Copper.

Discussion;

Among the options; Only Copper is a metal and as such, is capable of losing electrons in a bid to become a cation.

The other atoms on the other hand are electronegative and as such have high electron affinity as they can receive electrons to form anions.

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Answer 2

Answer: Copper, because it is the only metal out of all of them. Therefore copper is the only element that can loose electrons to have a positive charge, it is the most likely to become a cation.
I have not learnt this in school yet, but I researched it, and this is what all the websites say.
Hope this helps!

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The force of attraction that the earth exerts on all objects is called

Answers

The force of attraction that the earth exerts on all objects is called gravitational force. The gravitational force is the force that has the property of attracting any object having a mass. Without this gravitational force it would not have been possible for anything to remain on earth. Everything would start floating without the gravitational pull of earth. There are actually four kind of forces that are considered in physics. They are the strong force, weak force, gravitational force and the electromagnetic force. It is absolutely true that every object is pulling other objects due to the forces present in nature.

In a very violent reaction called a thermite reaction, aluminum metal reacts with iron (III) oxide to form iron metal and aluminum oxide according to the following equation:

Answers

Here's the equation:
Fe2 O3 + 2Al → 2Fe + Al2 O3

Here's the question.
What mass of Al will react with 150g of Fe2 O3?

In every 2 moles Al you need 1 mole Fe2O3

moles = mass / molar mass
moles Fe2O3 = 150 g / 159.69 g/mol
= 0.9393 moles

moles Al needed = 2 x moles Fe2O3
= 2 x 0.9393 mol
= 1.879 moles Al needed

mass = molar mass x moles
mass Al = 26.98 g/mol x 1.879 mol
= 50.69 g
= 51 g (2 sig figs)

So the mass of Al that will react with 150g of Fe2 O3 is 51 grams.

A 3.50 g sample of an unknown compound containing only C , H , and O combusts in an oxygen‑rich environment. When the products have cooled to 20.0 °C at 1 bar, there are 4.41 L of CO2 and 3.26 mL of H2O . The density of water at 20.0 °C is 0.998 g/mL.

Answers

Explanation:

First, calculate the moles of $CO_(2)$ using ideal gas equation as follows.

PV = nRT

or, n = $(PV)/(RT)$

= $(1 atm * 4.41 ml)/(0.0821 Latm/mol K * 293 K)$ (as 1 bar = 1 atm (approx))

= 0.183 mol

As, Density = $(mass)/(volume)$

Hence, mass of water will be as follows.

Density = $(mass)/(volume)$

0.998 g/ml = $(mass)/(3.26 ml)$

mass = 3.25 g

Similarly, calculate the moles of water as follows.

No. of moles = $\frac{mass}{\text{molar mass}}$

= $(3.25 g)/(18.02 g/mol)$

= 0.180 mol

Moles of hydrogen = $0.180 * 2$ = 0.36 mol

Now, mass of carbon will be as follows.

No. of moles = $\frac{mass}{\text{molar mass}}$

0.183 mol = $(mass)/(12 g/mol)$

= 2.19 g

Therefore, mass of oxygen will be as follows.

Mass of O = mass of sample - (mass of C + mass of H)

= 3.50 g - (2.19 g + 0.36 g)

= 0.95 g

Therefore, moles of oxygen will be as follows.

No. of moles = $\frac{mass}{\text{molar mass}}$

= $(0.95 g)/(16 g/mol)$

= 0.059 mol

Now, diving number of moles of each element of the compound by smallest no. of moles as follows.

C H O

No. of moles: 0.183 0.36 0.059

On dividing: 3.1 6.1 1

Therefore, empirical formula of the given compound is $C_(3)H_(6)O$ .

Thus, we can conclude that empirical formula of the given compound is $C_(3)H_(6)O$ .

The equation shows the reaction between zinc metal and hydrochloric acid.Zn(s) + 2HCl(aq) mc014-1.jpg ZnCl2(aq) + H2(g)

What is the theoretical yield of hydrogen gas if 5.00 mol of zinc are added to an excess of hydrochloric acid?
5.05 g
10.1 g
182 g
682 g

Answers

The balanced chemical reaction is written as:

Zn(s) + 2HCl(aq) = ZnCl2(aq) + H2(g)

We are given the amount of the reactant zinc to be used in the reaction This amount would be the starting point for the calculation. It is as follows:

5.00 mol Zn ( 1 mol H2 / 1 mol Zn ) (2.02 g H2 / 1 mol H2 ) = 10.1 g H2

Therefore, the correct answer is the second option.

Answer:

B. 10.1g

Explanation:

Calculate the morality of each of the following solutions: a. 15.4 g KCl in 289.2 mL solution b. 14.4 g of CaCl2 in 0.614 L solution c. 28.0 mL of 3.00 M H2SO4 diluted to 0.250 L

Answers

The answer is:
a. 0.712 M
b. 0.210 M
c. 0.336 M

Molarity is a measure of the concentration of solute in a solution.
It can be expressed as moles of solute ÷ volume of solution:
c = n ÷V
where:
c - concentration of solute,
n - moles of solute
V - volume of solution

n can be expressed as:
n = m ÷ Mr
where:
n - moles of solute
m - mass of solute
Mr - relative molecular mass

a. We know volume:
V = 289.2 mL = 0.2892 L
We need n and c.

n = m ÷ Mr
m = 15.4 g
Mr (KCl) = 74.55 g/mol
n = 15.4 g ÷ 74.55 g/mol
n = 0.206 mol

Thus,
c = 0.206 mol ÷ 0.2892 L
c = 0.712 mol/L = 0.712 M

b. We know volume:
V = 0.614 L
We need n and c.

n = m ÷ Mr
m = 14.4 g
Mr (CaCl₂) = 110.98 g/mol
n = 14.4 g ÷ 110.98 g/mol
n = 0.129 mol

Thus,
c = 0.129 mol ÷ 0.614 L
c = 0.210 mol/L = 0.210 M

c. We can use formula:
m₁V₁ = m₂V₂
m₁ = 3 M
V₁ = 28 mL= 0.028 L
m₂ = ?
V₂ = 0.250 L
Thus:
3 M × 0.028 L = m₂× 0.250 L
m₂ = 0.336 M

The primary role of ATP is to _______ by transferring a phosphate group to a molecule and forming ADP.A
provide energy for cellular work

B)

produce heat energy

C)

reduce the activation energy of a reaction

D)

take energy from cellular work

Answers

Answer:

A) provide energy for cellular work

Explanation:

The Adenosine triphosphate (ATP) molecule is the nucleotide known in biochemistry as the "molecular currency" of intracellular energy transfer; that is, ATP is able to store and transport chemical energy within cells. ATP also plays an important role in the synthesis of nucleic acids.

ATP always GIVES ENERGY

Final answer:

The primary function of ATP is to provide energy for cellular work. It does so by transferring a phosphate group to a molecule and forming ADP. This key process drives cellular metabolism and enables life-critical activities.

Explanation:

The key role of ATP, also known as Adenosine Triphosphate, is to provide energy for cellular work. ATP carries out this function by transferring a phosphate group to a molecule. This breaks a high energy bond and forms ADP (Adenosine Diphosphate), releasing energy that can be utilized by the cell to do work.

ATP acts as the primary energy currency of the cell. This process is at the heart of cellular metabolism and is common to all living organisms. Essentially, ATP acts as a bridge, transferring energy from chemical reactions that yield energy to cellular processes that consume energy, such as muscular contraction, cell division, or the synthesis of biomolecules.