Chemistry Middle School

16. Which of the following are examples of ionic compounds? Select all that apply.
A)KBr
B)NH3
C)Mg12
D)FeF3

Answers

Answer 1

Answer:

KBr, FeF3

Explanation:

Potassium ion (K+) + bromide ion (Br-) make the ionic compound KBr

Iron (III) ion (Fe3+) + 3 fluoride ions (F-) make the ionic compound FeF3

NH3 has covalent bonds so it isn't ionic

Mg12 is an elemental compound

Answer 2

Examples of the ionic compounds are KBr, FeF3.

The following information should be considered:

The ionic compound KBr should be made of the potassium ion (K+) and bromide ion (Br-).The ionic compound FeF3 should be made of Iron (III) ion (Fe30 and three fluoride ions (F-). NH3 is the covalent bonds. Mg12 should be the elemental compound.

Therefore we can conclude that examples of the ionic compounds are KBr, FeF3.

Learn more: brainly.com/question/23334479

Related Questions

What is the function of the muscle tissues in your heart? (A)muscle tissues in your heart help your stomach digest food.(B)muscle tissues in your heart help it to pump blood to the rest of your body.(C)muscle tissues in your heart allow you to breathe.(D)muscle tissues in your heart help your body take in nutrients.

Answers

The answer is B, the heart is the center of the cardiovascular system as one of its main tasks is to distribute blood throughout the body.

The correct answer is B I’m pretty sure

Where is the DNA stored in a cell?

Answers

Answer: nucleus

Explanation:

The dna cells are in the Nucleus

What is the charge on the Cr in Cr2O72-

Answers

Answer:

+6.

Explanation:

So, a chromium atom here has an oxidation number of +6.

In the dichromate ion, the oxidation number of chromium is+6. The sum of the oxidation numbers in Cr2O72-, a polyatomic ion, is -2, the charge of the ion.

Can anyone help me with these science questions?

1. What is collision theory?

2. How does collision theory relate to factors that affect reaction rate?

3. Define reaction rate.

4. List factors that influence the rate of a chemical reaction.

5. Choose one of the factors you listed in your answer to question 2, and explain how it affects reaction rate.

Answers

Answer:

This is where google becomes your best friend but I got you

Explanation:

1. A theory used to predict the rates of chemical reactions, particularly for gases. The collision theory is based on the assumption that for a reaction to occur it is necessary for the reacting species (atoms or molecules) to come together or collide with one another.

2. Collision theory says that chemical reactions occur by the collisions between atoms and molecules, so the more collisions the faster the rate of the chemical reactions.

3. The speed at which a chemical reaction proceeds. It is often expressed in terms of either the concentration (amount per unit volume) of a product that is formed in a unit of time or the concentration of a reactant that is consumed in a unit of time.

4. There are four main factors that can affect the reaction rate of a chemical reaction:

Reactant concentration. Increasing the concentration of one or more reactants will often increase the rate of reaction. ...

Physical state of the reactants and surface area. ...

Temperature. ...

Presence of a catalyst.

Answer:

1. a theory that says a chemical reaction takes place when particles of the reactants collide with sufficient energy to initiate the reaction

2. Increasing the concentration of the reactants, the faster the particles will collide so the reaction rate will be faster

3. a measure of how fast a reaction takes place

4. Temperature, presence of a catalyst, reactant concentration, surface area

Explanation:

not sure how to do number 5 sorru

why is compound not a mixture?

Answers

Compound is a pure substance containing two or more elements that are chemically combined in a fixed ratio but mixture is made up of two or more substances that are not chemically combined.

The way my chemistry professor explained it was compounds are from the same side (nonmetals), so they don’t necessarily mix well. It would be different if it was an ionic bond, because ionic bonds are when metals and nonmetals mix.

WHOEVER ANSWERS FIRST WILL GET BRAINLIST

Answers

Answer:

Explanation:

Answer:

Explanation:

how can you determine if the information you are reading is based on science or not?

Answers

Typically if based on science it will have scientific terms or be believable and backed up by facts

Clear scientific writing generally follows a specific format with key sections: an introduction to a particular topic, hypotheses to be tested, a description of methods, key results, and finally, a discussion that ties these results to our broader knowledge of the topic

I'm gonna try this for the last time. Who wants to write a book with me?

Answers

Answer:

me <3

Explanation:

please help

I've finished all my other questions but I'm really stuck on these two

Answers

Answer: 66.66 / 66.67 / 66 2/3 hydrogen 33.33 / 33 1/3 oxogen

for question e

in grams of course

question e:66.66/66.67/66 2/3
hydrogen: 33.33/33 1/3 oxogen

Can you please help me

Answers

answer:

The first in the row is correct

The correct answer is c I hope this helped you

Two different elements that are chemically combined form a __________, while two different elements that are only physically combined form a __________.

Answers

Answer: Two different elements that are chemically combined from a compound, but two different elements that are physically combined form a mixture.

Hope this helped :D

Compound ; mixture
Hope this helps

Research gestation and mating. Find out three other mammals' gestation periods and mating rituals. How long is the gestation period, how do the mates court each other, and do they mate for life? What are some other interesting facts? Choose any three mammals you are interested in and use any sources you like. Write a three-paragraph essay comparing the gestation period of the three animals.

For an extra challenge, see if you can find out if any mammal has a shorter gestation period than mice or a longer one than Asian elephants.

Answers

Answer:

hold on i will help you soon

The period of time when sexual intercourse takes place between two organisms is called mating. However, all the matings need not end in fertilization.

The gestation period is a time when the embryo develops completely into a fetus. This is usually from the time of fertilization to the time of giving birth.

Let us take the comparison of the gestation period of 3 mammals.

The gestation period of a cow varies from 279- 287 days. The mating between the bull and cow occurs during the heat or oestrus period of the cow. At that time the bull mounts on the cow or vice-versa may happen during the mating period. This is termed bulling.

In the case of horses, the gestation period is 320-380days. The mating ritual in a horse is a bit different than in a cow. It usually has three phases of sexual behavior which includes: courtship, mating, and post mating behavior. During courtship, the stallion which is the male horse will approach the mare, prance, sniff her, nuzzle her, and groom her. The mare which is the female horse may squeal, kick, or move away to show the stallion that she is not ready. When the mare is receptive to breeding, she may stand still, deviate her tail, and urinate, leading the stallion to mount her. It usually breeds well in pastures than in controlled environmental breeding conditions.

Whereas in camels, the gestation period is far longer than in cows and horses. It is about 360-440days. The male camel displays its organ called a dulla to show out is ready for mating. The male camel Urinates on its own tail and swishes it over its back so that the Urine contains female-attracting pheromones. It shows distinct violent behavior towards other male camels. The female camel undergoes an estrous cycle in the breeding season which lasts receptive for 3-4 days, and non-receptive following the other 10 days. In the receptive period, the camel sits down and exposes its genitalia for the male camel to copulate. The whole mating takes about 20 minutes and is accompanied by gurgling and frothing by the male and bleating by the females.

It should be noted that African elephants have longer gestation periods like Asian elephants whereas no other animal has a longer gestation period than an elephant or a shorter gestation period than mice.

To know more about fertilization, click below:

https://brainly.com/question/1154065

#SPJ1

What are the reactants in this chemical reaction?
Remember: Reactants are what react together to form products.
A) Sodium Sulfite and Hydrochloric Acid
B) Water and Sulfur Dioxide
C) Hydrochloric Acid and Sulfur Dioxide
D) Sodium Chloride and Water

Answers

Answer: a

Explanation: because, as we know reactants are what react to form a product. In the chemical reaction given, if you add sodium sulfite and hydrochloric acid it will form sodium chloride + water + sulfite dioxide.

Answer:The answer is A

The prefix hmomo comes from the Greek word that means " the same or alike". Predict the meaning of the prefix hetero.

Answers

Hetero means different. Examples could be heterogenous (different in form) or heterozygous (having two different forms of a gene).

Hetro means different

a new planet is discovered in a different solace system.The new planet is much like earth. One difference is that the planet does not have seasons. What can you conclude is one feature of earth that is lacking from the new planet?

1. earth has a tilted axis
2. earth has a moon
3. earth has a geosphere
4. earth has a longer rotational period

Answers

1:))))))))))))))))))

1!!!!!!!!!!!!!!!!!!!!!!!!!

A student wants to know how the number of geese in a study area affects the number of parts in their songs. She performs an experiment and records the data in a table.
Which two terms describe this type of data?

A.
Quantitative

B.
Empirical

C.
Theoretical

D.
Qualitative

Answers

Theoretical did this question

The two terms that describe this type of data are Quantitative and Qualitative. Therefore, the correct options are A and D.

Data that can be measured and expressed numerically, denoting quantities or amounts, is called quantitative data. In this example, the number of geese is counted and correlated with the number of pieces in their symphony. Instead of being numerical, descriptive and categorical data are called qualitative data. In this example, it is observed and noted how many sections are in the swan songs (descriptive categories).

Therefore, the correct options are A and D.

Learn more about Qualitative data, here:

https://brainly.com/question/1417786

#SPJ3

How does an atom change if all of its electrons are removed?
p.s. I'll mark the first answer the brainliest if it is correct! ;)

a. The atom’s volume increases.

b. The atom’s mass increases.

c. The atom becomes positively charged.

d. The atom becomes negatively charged.

Answers

c. The atom becomes positively charged

if the electrons are removed it means theres no longer a negative charge to balance the positive charge of the protons in the atom

C the atom becomes positively charged

Match the term to its definition (Lessons 6.03, 6.04 and 6.05)
(i can't fit this all without confusion)

Answers

Answer: the first paragraph is rain forest biome and the 2nd one is arctic tundra biome and finally the last paragraph is ocean or marine biome

Explanation:

rain forests have warm temperatures and include alot of animals and plants , artctic tundra biome includes cold temperatures ice stuff and all that and ocean or marine biome is pretty much just the ocean with seals , whales and marine life yk.

What happens to the sugar from a sugar cube after it has dissolved in a cup of tea? (Molecule related)

Answers

Answer: Sugar is very soluble in water. When you add the solid to the tea the key process is that the solid sugar dissolves in the warm liquid: the solid crystals are broken up into molecules which are every dispersed throughout the existing liquid.

Explanation:

Diffusion of molecules occur after it has dissolved

In an experiment, the factor that we measure is called the A) independent variable B) conclusion C) controlled variable D) dependent variable

Answers

Answer:

Controlled variable?

Explanation:

I do know it is out of A C and D but even though it is in every science assessment I have i always fail to forget but I may be right but not fully sure last time I saw this the question was 4 weeks ago when I was really tired

What happened when the two substances were combined together in the cup? (highlight one)
The substances changed into different substances.
The substances did not change into different substances.
I am not sure if the substances changed into different substances.
Explain your answer using evidence from the Sim.

Answers

Based on evidence from Sim, when two substances were combined they did not change into different substances.

Here the word Sim is used to describe the process simulation. Simulation is defined as when two substances combined they do not change into different substances.

They just combine together and form a new substance.

Let us understand it as the first substance is liquid and the second substance is solid then when we combine both of them they form a new mixture but do not change their property.

The mixture is still liquid but it also has some properties of solid substance.

For more details about Sim,

https://brainly.com/question/31764333

The substances did not change into different substances.

Based on the information provided in the question, there is no evidence or indication of any chemical reaction or change in the substances when they were combined in the cup. The question does not mention any observations or effects that would suggest a chemical transformation.

If there were a chemical reaction or change, it would typically be accompanied by observable signs such as color change, gas production, temperature change, or formation of a precipitate. However, since the question does not provide any evidence or observations of such changes, we can conclude that the substances did not undergo any chemical transformation when combined.

It is important to note that without additional information or details about the substances and their behavior, it is not possible to make definitive conclusions. However, based on the given information, the most reasonable conclusion is that the substances remained unchanged when combined in the cup.

To learn more about substances, here

https://brainly.com/question/13320535

#SPJ2

Which of the following observations indicates that atoms of all elements contain small, negatively charged particles?

A) Alpha particles are repelled by cathode rays of elements

B) Cathode rays are deflected towards a positively charged rod

C) a particulat frequency of light is produced by a gas in an excited state

D) certain areas of the atom called orbitals contain all the charged particles

Answers

Answer:

B) Cathode rays are deflected towards a positively charged rod.

Answer: The correct option is b (Cathode rays are deflected towards a positively charged rod )

Where does most fresh water exist?

Answers

Answer:

aquifers, ice caps, and glaciers I think

The answer:

(C) aquifers, ice caps and glaciers

When the speed of the bottle is 2 m/s, the KE is kg m2/s2. When the speed of the bottle is 3 m/s, the KE is kg m2/s2. When the speed of the bottle is 4 m/s, the KE is kg m2/s2. When the speed of the bottle is 5 m/s, the KE is kg m2/s2. When the speed of the bottle is 6 m/s, the KE is kg m2/s2.
instructions
In this part of the experiment, you will be changing the speed of the bottle by dropping it from different heights. You will use the same mass, 0.250 kg, for each trial, so record this mass in Table B for each velocity. Then, calculate the expected kinetic energy (KE) at each velocity. Use the formula KE = mv2,
where m is the mass and v is the speed. Record your calculations in Table B of your Student Guide.

Answers

Answer:

Based on the given instructions, you need to calculate the expected kinetic energy (KE) at each velocity using the formula KE = mv^2, where m is the mass and v is the speed. The mass is given as 0.250 kg.

Table B: Calculation of Kinetic Energy (KE)

Speed (m/s)Mass (kg)KE (kg m^2/s^2)20.2500.50030.2500.75040.2501.00050.2501.25060.2501.500

To calculate the kinetic energy at each velocity, multiply the mass (0.250 kg) by the square of the velocity.

For example, when the speed of the bottle is 2 m/s: KE = (0.250 kg) * (2 m/s)^2 = 0.250 kg * 4 m^2/s^2 = 1.000 kg m^2/s^2

Perform similar calculations for the other velocities and record the results in Table B.

Answer:

Explanation:mass of the bottle in each case is M = 0.250 kg

now as per given speeds we can use the formula of kinetic energy to find it

1) when speed is 2 m/s