Which statement describes a step in the formation of an ionic bond?An attraction occurs between two ions that have the same charge.
A metal atom forms a cation, and a nonmetal atom forms an anion.
A more electronegative atom transfers electrons to a less electronegative atom.
A metal pulls electrons from another metal and produces a force of attraction.

Answers

Answer 1

Answer: The correct answer is a metal atom forms a cation, and a nonmetal atom forms an anion. This is because metals are less electronegative than nonmetals and will therefore give electrons to nonmetals. Atoms that give up electrons will have a positive charge therefore becoming a cation while atoms that accept electrons will have a negative charge therefore becoming an anion.

Ions that have the same charge can't be attracted to each other since it takes a positive and negative charge to cause attractive forces.

A less electronegative atom will transfer electrons to a more electronegative atom.

A metal (cation) can pull electrons from another metal (not an ion) but that does not form an attractive force between the two metals (You will learn more about this when you go over reduction potentials, redox reactions, and electrochemistry).

I hope this helps. Let me know if anything is unclear.

Answer 2

Answer:

The answer is (B) A metal atom forms a cation, and a nonmetal atom forms an anion.

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Which element has the greatest density at stp? calcium, chlorine, carbon or copper?

Answers

density = mass/volume

Since at STP, one mole of any gas occupies 22.4 liters, therefore, the volume is equal.
So, we will arrange based on mass.

From the periodic table:
mass of carbon = 12 grams
mass of calcium = 40 grams
mass of chlorine = 35.5 grams
mass of copper = 63.5 grams

Based on this:
copper has the highest density.

The element that has maximum density at STP is copper.

Further explanation:

The property is a unique feature of the substance that differentiates it from the other substances. It is classified into two types:

1. Intensive properties:

These are the properties that depend on the nature of the substance. These don't depend on the size of the system. Their values remain unaltered even if the system is further divided into a number of subsystems. Temperature, refractive index, concentration, pressure, and density are some of the examples of intensive properties.

2. Extensive properties:

These are the properties that depend on the amount of the substance. These are additive in nature when a single system is divided into many subsystems. Mass, energy, size, weight, and length are some of the examples of extensive properties.

Density is a characteristic property of the substance. It is defined as the mass per unit volume. It is generally represented by $\rho$ .

The formula to calculate the density of the liquid is,

$\text{Density of liquid}(\rho)=\frac{\text{Mass of liquid(M)}}{\text{Volume of liquid (V)}}$

Standard Temperature and Pressure is denoted as STP and the volume of 1 mole of gas at STP is 22.4 litres.

The volume is constant and therefore density is directly related to mass.

Among the given elements copper has the highest molar mass and that is $63.5\;{\text{g/mol}}$ . Therefore the element that has maximum density at STP is copper.

Learn more:

1. Calculation of density: brainly.com/question/778841

2. Determine how many moles of water produce: brainly.com/question/1405182

Answer details:

Grade: Middle School

Subject: Chemistry

Chapter: Density

Keywords: density, mass, volume, STP, intensive, extensive, characteristic property, element, copper, chlorine, calcium, and carbon.

The first major source of oxygen gas was _____.a. volcanic outgassing
b. meteorite impacts
c. cyanobacteria
d. banded iron formations

Answers

The first major source of life on Earth was c. cyanobacteria. These organisms produce food by using energy from the sun; they are photosynthetic organisms. Over millions of years these organisms used CO2 in the air for photosynthesis and released oxygen as a byproduct. Over time oxygen concentrations rose high enough to support life.

The word that best fits in the blank in the sentence, "The first major source of oxygen gas was _____" is cyanobacteria. Thus, the answer is letter C. Cyanobacteria are blue-green algae and they are believed to have caused the "great Oxidation Event".

The results of an investigation are the
(Blank)

Answers

Answer: ending results

Explanation:

Final answer:

The results of an investigation are the observations and data collected during an experiment or research, which may be qualitative or quantitative. For example, the results of a plant growth experiment could include measurements and descriptions of the plants under different light conditions.

Explanation:

The results of an investigation are the findings obtained from carrying out an experiment or research. An investigation seeks to answer a question, test a hypothesis, or solve a problem. The results constitute the data collected and analyzed, which may be quantitative (numerical) or qualitative (descriptive) in nature. For example, if you conduct an investigation to determine the effect of light on plant growth, your results might include measurements of plant height, color intensity, and a description of leaves condition at different light exposures.

Learn more about Investigation Results here:

brainly.com/question/25223692

#SPJ2

The step in the water cycle in which water vapor becomes liquid water is

Answers

Condensation. It is caused by a change in pressure and occurs when warm air rises, cools, and collides with an object

I.e. a stove pot

At STP 10 grams of CO can be dissolved in 3 L of water. Calculate the solubility of carbon monoxide at 200kPa.

Answers

moles CO = 10 g x 1mol 28g = 0.357 moles in 3 L = 0.119 mol/L at STP
P1/n1 = P2/n2
101.325 kPa/0.119 = 200 kPa/n2
n2 = 0.235 moles/L = 0.235mol x 28g/mol = 6.6g/L (assuming no change in temp)

Answer : The solubility of carbon monoxide gas at pressure 200 kPa is, 6.579 g/L

Explanation :

According top the Henry's Law, the solubility of a gas in a liquid is directly proportional to the pressure of the gas.

$S\propto P$

or,

$(S_1)/(S_2)=(P_1)/(P_2)$

where,

$S_1$ = initial solubility of gas = $(10g)/(3L)$

$S_2$ = final solubility of gas = ?

$P_1$ = initial pressure of gas = 101.325 kPa (at STP)

$P_2$ = final pressure of gas = 200 kPa

Now put all the given values in the above formula, we get the final solubility of the gas.

$((10g)/(3L))/(S_2)=(101.325kPa)/(200kPa)$

$S_2=6.579g/L$

Therefore, the solubility of carbon monoxide gas at pressure 200 kPa is, 6.579 g/L

HELP ASAPFor the reaction A(g) → 2B(g), Keq = 4.5 × 105. Which statement is true for the system at equilibrium?
a) [A] >> [B]
b)Changing the temperature will have no affect on the equilibrium.
c)There is twice as much A as there is B in the reaction vessel.
d)There is more than 100 times more B then there is A in the reaction vessel.
e)There is twice as much B as there is A in the reaction vessel.

Answers

The correct answer for the question that is being presented above is this one: "d)There is more than 100 times more B then there is A in the reaction vessel." The statement is true for the system at equilibrium is that d)There is more than 100 times more B then there is A in the reaction vessel.

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