The empirical formula of Magnesium Fluoride is; MgF₂, Iron(II) Sulfide is FeS, Magnesium Sulfide will be MgS, and Iron(II) Fluoride is FeF₂ for four binary ionic compounds that can be formed using the given ions.
To determine the empirical formula of binary ionic compounds, we need to combine the cation (positive ion) with the anion (negative ion) in the lowest whole number ratio that results in a neutral compound. Here are four examples using the given ions;
Magnesium Fluoride;
Cation; Mg²⁺
Anion; F⁻
To achieve a neutral compound, we need two fluoride ions to balance the charge of one magnesium ion.
Empirical Formula; MgF₂
Iron(II) Sulfide;
Cation; Fe²⁺
Anion; S²⁻
To balance the charges, we need one iron ion to combine with one sulfide ion.
Empirical Formula: FeS
Magnesium Sulfide;
Cation; Mg²⁺
Anion; S²⁻
To achieve a neutral compound, we need one magnesium ion to combine with one sulfide ion.
Empirical Formula: MgS
Iron(II) Fluoride;
Cation; Fe²⁺
Anion; F⁻
To balance the charges, we need two fluoride ions to combine with one iron ion.
Empirical Formula; FeF₂
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Why is salad dressing a solution?
Explanation:
A prime illustration of sour salad dressing formulas and suspension. Vinegar is also an acetic acid product which is dispersed in water, so we can't even see molecules in the oil. The removal throughout the liquid phase to make a solution.
Which is a liquid that is used to absorb and release thermal energy?
coolant
lubricant
grease
fuel
Answer
grese
Explanation:
Any liquid could absorb and release thermal energy. However, a refrigerant or a coolant absorbs heat and releases it to any area faster than any ordinary liquid such as water. So to complete the sentence: A refrigerant/cooler is a liquid that absorbs and releases thermal energy
Answer:
The correct answer is coolant.
Hope it helps. :)
if an element number has a mass number of 244 and an atomic number of 94, how many neutrons does the element have
Determine whether each item is an example of preservation or conservation. Yellowstone National Park Mining regulations No-fly zones Endangered Species Act Captive-breeding programs Big Cypress National Preserve
Answer:
Yellowstone National park-preservation
Mining Regulations- conservation.
Captive Breeding programs- conservation
Big Cypress National preserve-Preservation
No Fly zones conservation
Endangered species act- preservation
Explanation:
Conservation seeks the proper use of nature, while preservation seeks protection of nature from use.
The example of the preservevation or conservation are :
Yellowstone National park - preservation mining rules - conservation.captive programs- conservation cypress preserve - Preservationno Fly zones - conservation.endangered species act - preservationWhat is the difference between preservation and conservation?Preservation is the action of preserving something such as to protect or to keep alive something parks are meant for preservation purposes. Conservation is a wasteful use of resources. Conservation includes the preservation of natural resources.
Find out more information about the preservation.
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At what power of ten does the entire solar system come into view
Answer: 10,000,000,000 kilometers
Explanation:
All the planets in our solar system come into view. But at this distance, only Jupiter and Saturn would be visible with the naked eye.
Which phrase best describes the water cycle?
The physical processes that move water through the atmosphere
The interconnected, continuous processes that move water through Earth's spheres
Water changing from liquid to gas and back to liquid
The chemical components that make up water
Answer:
I think option B , bcz it is continuous process
The continuous, interconnected processes that move water through Earth's spheres best describe the water cycle. Therefore, option B is correct.
What is the water cycle?The water cycle can be demonstrated as the continuous movement of water from the Earth's surface to clouds and from clouds to the back surface. The sun, air, and other factors are included in the physical process of the water cycle, water goes through each of the states of matter such as solid, liquid, as well as gas.
The water cycle is a combination of the physical processes where water evaporates from the earth's surface into the atmosphere, cools down, condenses produces rain in clouds, and again comes back to the surface of the earth with the precipitation process.
Water on the Earth's surface of the water after rain gets collected in the form of rivers, groundwater, ponds, etc., and combines in oceans and gets evaporated.
The evaporation process includes the exchange of water from the surface in the form of water vapors to the atmosphere. The process of evaporation cools the temperature of the atmosphere as the sunlight on the surface of the earth makes the warm.
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A passenger elevator travels from the first floor to the 60th floor, a distance of 210 m, in 35s. What is the elevator’s speed?
Answer:6m per second
Explanation:
HELLPP!!!
What property allows objects to be subject to gravity?
friction
mass
inertia
acceleration
Answer: i gotcu the answer is mass
Explanation: The more weight of the object the more its subject to gravity like a feather barley is while a bowling ball smashes into the ground :D
The property allows objects to be subject to gravity is mass. Therefore, option B is correct.
What is mass ?Mass is a physical body's total amount of matter. Inertia, or the body's resistance to acceleration when a net force is applied, is also measured by this term.
The strength of an object's gravitational attraction to other bodies is also influenced by its mass. The kilogram serves as the SI's fundamental mass unit. The amount of matter object present is also known as mass.
The amount of matter that makes up every item or body is the greatest way to understand mass. Everything that we can see has mass. Examples of objects with mass include a table, a chair, your bed, a football, a glass, and even air. The mass of a thing determines whether it is light or heavy.
Thus, option B is correct.
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4. Describe the movement of the water molecules at cold temperatures.
Answer:
Point out to students that molecules of hot water are moving faster and are slightly further apart. The molecules of cold water are moving slower and are a little closer together. If students do not notice a difference, move the slider all the way to the left again and then quickly to the right.
2. How do molecules move in cold water?
Compare the speed of molecules in hot water compared to molecules in cold water? Water molecules move faster in hot water and slower in cold water. water molecules in cold, room temperature, and hot water. most of the liquid.
4.Which scientist described the electrons as traveling in certain orbits or energy levels?
a.Dalton
b.Rutherford
c.Thomson
d.Bohr
5.In a famous experiment, scientists bombarded a very thin gold (Au) foil with positively charged alpha particles. They found that most of the alpha particles passed right through the Au foil. However, a few of the alpha particles were deflected or bounced back toward the source. How did these scientists explain their results?
a.Negative charges are spread throughout the atom.
b.Negative charges are located in the tiny nucleus of the atom.
c.Positive charges are located in the tiny nucleus of the atom.
d.Positive charges are spread throughout the atom.
6.The atomic mass represents the weighted average of an element’s
a.Ions
b.mass numbers
c.atomic numbers
d.isotopes
7.The number of protons is represented by the element’s
a.atomic number
b.mass number
c.atomic mass
d.isotope
8.The number of protons plus neutrons is represented by the
a.atomic number
b.mass number
c.atomic mass
d.isotope
9.How many valence electrons would an atom of Chlorine have?
a.2
b.3
c.7
d.8
10.An element is found to have 2 electrons in the 3rd energy level. What is this element?
a.Boron
b.Magnesium
c.Fluorine
d.Argon
11.Which shows the order of decreasing atomic size?
a.Si, Al, Mg, Na
b.I, Br, Cl, F
c.Be, Mg, Ca, Sr
d.C, P, Se, I
12.Which of the following elements has the highest ionization energy and why?
a.Argon because it has more protons in the nucleus.
b.Argon because it has a full valence shell.
c.Chlorine because it only needs one valence electron to fill its valence shell.
d.Chlorine because it attracts electrons better.
13.Which shows the order of increasing ionization energy?
a.Si, Al, Mg, Na
b.Ga, Ge, As, Se
c.Be, Mg, Ca, Sr
d.F, Cl, Br, I
14.Identify the reason why atoms decrease in size(atomic radius)across a period on the Periodic Table.
a.Gravity pulls the electrons in towards the nucleus.
b.Increase in energy levels increases the attraction and thus pulls electron cloud in.
c.Increasing strong positive nuclear charge from the nucleus pulls in the negative electron clouds and increases with the increase in protons and electrons.
d.Electrons lose energy and collapse with an increasing number of electrons and protons.
15.What is the shielding effect?
a.The neutrons shield protons from the attraction of the electrons from the first energy level.
b.Valence electrons are shared equally between atoms.
c.The repulsion of electrons in the same energy level.
d.The inner-core electrons shield outer-core electrons from the attraction to the atom’s nucleus.
16.Which statement is an accurate description of elements from Period 3 on the periodic table?
a.It contains elements with the same number of 3 protons.
b.It contains elements with the same number of3valence electrons.
c.It contains elements with the outermost protons in the same 3rd energy level.
d.It contains elements with the outermost electrons in the same 3rd energy level.
17.The column that an element is located in tells us
a.the total number of valence electrons an atom has.
b.the total number of energy levels an atom of that element has.
c.the highest energy level an atom of that element has.
d.both b & c.
18.The Halogen family of elements all have 7 valence electrons. Which column would they be in?
a.01 (IA)
b.02 (IIA)
c.4 (IVA) or 14
d.7 (VIIA) or 17
19.The Alkali and Alkaline Earth metals belong to which columns, respectively?
a.Column IA & IIA
b.Column VIIA & Column VIIIA
c.Column IIIA & IVA
20.What do carbon and silicon have in common?
a.They belong to the same column (family), therefore they have the same number of valence electrons.
b.They belong to the same column (family), therefore they have the same number of total electrons.
c.They belong to the same column (family), therefore they have the same number of energy levels.
d.They belong to the same column (family), therefore they have the same number of protons.
21.Electromagnetic radiation can take the form of which of the following types of waves
a.Heat
b.Light
c.Ultraviolet
d.All of the above
24.In order to go to a lower energy orbit, an electron
a.Must disappear
b.Must combine with other electrons
c.Lose energy of a specific amount
d.Must be transferred to another atom
25.Please choose the correct sequence that describes the excitement of an atom.
1. Such an electron transition raises the atom from the ground state to the excited state.
2. When energy is added to an atom from an outside source, its electrons move to a higher energy level (orbit)
3. As a result, the atom emits a photon.
4. When the atom is in an excited state, the electron can drop from the higher energy level to a lower energy level.
a.1, 2, 3, 4
b.4, 3, 2, 1
c.2, 1, 4, 3
d.3, 4, 1, 2
HELPPPP!!!!
What property allows objects to be subject to gravity?
friction
mass
inertia
acceleration
what waves are utilized to sterilize medical equipment?
a. Gamma
b. X-ray
c. Ultraviolet
d. Radio
Answer:
B-Gamma
Explanation:
Please help it’s already overdue
Answer:
no se amigo esquema no entiendo ingles
Which [H+] value describes a neutral solution?
10−7 M
10−14 M
10−1 M
10−12 M
Answer:
[tex]10^{-7} m[/tex]
Explanation: just took the test; picture below:)
A solution is defined as a homogeneous mixture made up of two or more non-reacting substances. The [H⁺] for a neutral solution is 10⁻⁷ M . The correct option is A.
What is a neutral solution?A solution which is neither acidic nor basic and contains equal amount of hydrogen ion and hydroxide ion concentration. The distilled water is an best example of a neutral solution. It always has a pH 7.
The pH of a solution is defined as the negative logarithm of hydronium ion concentration in moles per litre. It can be given as:
pH = - log [H₃O⁺]
For pure water or neutral solution at 298 K
[H₃O⁺] = [OH⁻] = 1 × 10⁻⁷ mol L⁻¹
The pH of acidic solution is more than 7 and for basic solution the pH will be greater than 7.
Thus the correct option is A - 10⁻⁷ M .
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Is the reaction balanced?
Answer:
No
Explanation:
Which of the following statements is FALSE?
The microscopic size of cells enable them to function properly.
Most organisms on Earth are multi-celled.
Some cells can be shaped like a ball.
Growing children’s cells are constantly dividing.
Answer:
The answer is functioning properly ok dude?
Explanation:
Answer: "The microscopic size of cells enable them to function properly.
Most organisms on Earth are multi-celled." is false
Explanation:
In unicellular organisms, cell division is the means of reproduction; in multicellular organisms, it is the means of tissue growth and maintenance. Survival of the eukaryotes depends upon interactions between many cell types, and it is essential that a balanced distribution of types be maintained. This is achieved by the highly regulated process of cell proliferation. The growth and division of different cell populations are regulated in different ways, but the basic mechanisms are similar throughout multicellular organisms.
CLAIM: What is one strategy animals use to take care of their offspring and to ensure successful reproduction? EVIDENCE: List two examples of animals that use this strategy. REASONING: Explain how this strategy increases the probability that offspring will survive.
Answer:
alligators protect their offspring by digging a hole where they bury their eggs and stay all the meanwhile on top of the hole protecting their offspring. baby alligators can be eaten by birds and snakes. they for short periods of time take a break to hunt for food. when their hatchling hatch they keep them in their mouth until they're in the water. alligators are good protecting their offspring.
seahorses make the males take care of their baby's till they are born and male seahorses join together in groups to help protect eachother. once the babies are born male seahorses are still together helping raise their pups
Alligators bury their eggs in a hole that they have dug, and they then spend the entire time on top of the hole guarding their young. Therefore, by below given ways animals take care of their offspring.
What is offspring?Offspring refers to the new organism that an organism creates via the act of reproduction. Both birds and snakes can consume young alligators. They stop for brief periods of time to go food hunting. They hold their hatchlings in their mouths until they are in the water after they hatch. Alligators do a superb job of safeguarding their young.
Male seahorses form groups to assist defend one another, and they are required to care for their young until they are born. Male seahorses continue to work together to nurture their young after the babies are born.
Therefore, by above ways animals take care of their offspring.
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describe nuclear change please
Answer: Nuclear change is distinct from chemical change in that elements change. In the nuclear change the elements can change from one to another. (Nuclei can break apart to form smaller elements.)
Explanation:
Answer:
A nuclear change is a process by which nuclei of certain isotopes change spontaneously or are forced to change to two or more different isotopes.
Explanation:
The three main types of nuclear change in the matter are radioactive natural disintegration, nuclear fission, and nuclear fusion.
I like blowing up stuff too
Define the terms Genotype and Phenotype.
genotype: genetics of a individual organism
phenotype: the set of observable (physical) characteristics of an individual resulting from the interaction of its genotype with the environment.
Answer:
A genotype refers to the genetic characteristics of an organism. A phenotype refers to the physical characteristics.
Mg3N2+3H2O-3MgO+2NH3 If 17 g of magnesium nitride is used, what volume of ammonia gas would be collected at 20°C and 0.989 atm?
Explanation:
what are the unit given for the questions
What is the atomic radius
of mercury?
The answer is 155 pm, hope this helps!
Name the acid and the base from which the salt calcium sulphate is formed. also write the
balanced chemical equation for the chemical reaction
Answer:
Calcium Carbonate base and Sulphuric acid.
CaCO3 and H2SO4
Answer:
Skeletal equation : Ca(OH)2 + H2SO4 ----> CaSO4 + H2O
Balanced equation : Ca(OH)2 + H2SO4 ---> CaSO4 + 2H2O
Hope it helps
how many moles of oxygen gas are produced in the decomposition of 5.00g of potassium chlorate?
Given: KClO3= O2+KCl
Answer:
0.0612 moles of O2 produced
Explanation:
First we convert from grams of Potassium Chlorate to moles..
Amu = 122.5
5.00g / 122.5 g = 0.0408163265 moles of Potassium Chlorate
Now we need to use the chemical equation to find the ratio of Potassium Chlorate to Oxygen... But first, we need to balance it
Original Chemical Equation : KClO3 = O2 + KCl
Balanced Chemical Equation : 2KClO3 = 3O2 + 2KCl
Now we will use the balanced chemical equation to find the ratio of Potassium Chlorate to oxygen (in order to convert to moles of oxygen for our answer)
We can see that for every 2 moles of Potassium Chlorate that are decomposing, we have 3 moles of oxygen gas produced.
So, we will set up our conversion factor like this:
0.0408163265 moles KClO3 * 3 moles Oxygen
-------------------------
2 moles KClO3
When we solve for this, we see that there are 0.0612244898 moles of O2 produced, or 0.0612 moles of O2 produced
Is it okay if you help me? I'm kind of in a tight spot here. Tysmmmmmmmmmmmmm o(❁´◡`❁)o!!
Answer:
the answer is true
Explanation:
it's just true
Which of the following statements are true of groups on the periodic table?
Check all that apply.
A. Elements in a group have the same number of protons.
B. Elements in a group have the same number of electron shells.
C. Elements in a group have similar properties.
D. Elements in a group have the same number of neutrons.
Answer: it’s only c
Explanation:
The correct statement regarding groups on the periodic table is statement C which is elements in a group have similar properties.
A. Elements in a group may have different numbers of protons, as the group represents elements with similar valence electron configurations, but the number of protons in the nucleus can vary.
B. Elements in a group do not have the same number of electron shells. Elements within the same group have similar outer electron configurations, which determine their chemical properties. The number of electron shells increases as you go down the group.
C. Elements in a group have similar properties. Elements within the same group share similar chemical behavior due to their similar outer electron configurations. This similarity leads to recurring patterns in their physical and chemical properties.
D. Elements in a group may have different numbers of neutrons. The number of neutrons can vary within a group as different isotopes of an element can exist, which have the same number of protons but different numbers of neutrons.
Therefore, the correct option is option c
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The heat to drive Earth's convection cells comes from...
A. the Earth's crust.
B. the Earth's mantle.
C. the Earth's core.
D. the sun.
Answer:
the sun im not 100% sure but yes
Answer:
B. The Mantle
Explanation:
The mantle is the part of the earth that has convection currents.
Picture a neutral Satom. This neutral atom will have
valence electrons. To reach a more stable configuration, this atom will
(gain, lose) electrons. The charge of the ion that forms will be
ASAP PLEASEE
Answer:
it will have 6 valence electrons
it will gain electrons
charge will be 2-
constrast a mixture and a compound , how are. they different?
Answer:
A mixture is composed of two or more elements or compounds in a non-fixed ratio, which means you can vary the amount of substance in a mixture. A compound is composed of two or more elements in a fixed ratio, so you cannot vary the amount of each element in a compound
Answer:
mixture retains property of combing substances while compound has new properties that are different from combing elements...
can be separated by physical means whereas compounds can be separated by chemical or electrochemical methods
Will give brilliantiest!!
can energy produce more carbon dioxide?
different fuels emit different amounts of carbon dioxide in relation to the energy they produce when burned to analyze
it is the combination of the uppermost mantle and the crust
Answer:
lithosphere
Explanation: