Answer:
a).lithium fluoride => LiF
lithium chloride =>LiCl
lithium bromide => LiBr
lithium iodide => Lil
lithium oxide =>Li₂O
lithium sulfide => Li₂
b).sodium fluoride => NaF
sodium chloride => NaCl
sodium bromide => NaBr
sodium iodide => Nal
sodium oxide => Na₂O
sodium sulfide => Na₂S
c).potassium fluoride => KF
potassium chloride => KCl
potassium bromide => KBr
potassium iodide => KI
potassium oxide => K₂O
potassium sulfide => K₂S
d).ammonium fluoride =>NH₄F
ammonium chloride => NH₄Cl
ammonium bromide => NH₄Br
ammonium iodide => NH₄I
ammonium sulfide => (NH₄)₂S
. which © substance describe the similar chemical the of composition?
Explanation:
write a news story using the clues given below
1. Which type of base is the chlorine molecule?
Answer:
chlorine-35 (75.53 percent) and chlorine-37 (24.47 percent)
do chemical equations with no reaction still have to be balanced
Answer:
The same number of atoms of each element must appear on both sides of a chemical equation. However, simply writing down the chemical formulas of reactants and products does not always result in equal numbers of atoms. You have to balance the equation to make the number of atoms equal on each side of an equation.
Explanation:
Observe the given picture, why do you think the chain changes its composition? Explain your answer in the discussion forum.
Since rusting is a chemical change, the chain changed its composition as a result of oxidation of iron to hydrated iron(iii) oxide
What are chemical changes?Chemical changes are changes which occur as a result of chemical reactions which occur in substances resulting in the production of new substances.
An example of a chemical change is rusting of iron.
Rusting of iron occurs as a result of the oxidation of iron when exposed to air and water.
The picture shows rusting of iron.
Therefore, the chain changed its composition as a result of oxidation of iron to hydrated iron(iii) oxide.
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1. Write formulas for the following compounds:
a. magnesium chloride, magnesium bromide, magnesium hydroxide, magnesium sulfide
b. calcium chloride, calcium bromide, calcium hydroxide, calcium oxide, calcium cyanide, calcium sulfide
2. Write formulas for the following compounds:
a. sodium hydroxide, sodium cyanide
b. ammonium cyanide
c. barium chloride, barium hydroxide, barium cyanide, barium oxide, barium sulfide
Answer:
=> The formulas are written above .
Explanation:
hope it's helpful
witch color has the longest wavelength
Answer:
Red light.
Explanation:
On one end of the spectrum is red light, with the longest wavelength. Blue or violet light has the shortest wavelength. White light is a combination of all colors in the color spectrum. It has all the colors of the rainbow.
Answer:
red
Explanation:
red has a wavelength of 630-700 nm
How many grams are in 5.00 moles of sodium carbonate?
Answer:
530 g
Explanation:
1 mole of Sodium Carbonate = 106g
5 moles = 106*5 = 530g
A small crystal is added to a solution and it sinks to the bottom of the beaker. What can this tell you about the original solution?
A. It is saturated, becaues the crystal will not sink to the bottom of the beaker.
B. It is supersaturated, because the crystal sank to the bottom of the beaker.
C. It is saturated, because when the crystal was added to the beaker, the entire solution turned into a solid.
D. It is unsaturated, because the crystal did not dissolve in the solution.
Answer:
answer is a supersaturated
Explanation:
Please help ASAP
4. Which of the following is not a characteristic of igneous rocks? (1 point)
Igneous rocks are formed when molten rock cools and hardens.
Igneous rocks have crystal grains.
Igneous rocks are larger in size because the rock cooled more slowly after the hot lava came out from the ground.
Igneous rocks have distinct layers that represent the time period when sediments were being deposited in them.
Answer:
igneous rocks have distinct layers that represents the time period
Explanation:
They are not formed overtime, nor have layers. They are just hardened lava.
how many moles is 784.616 g of H2SO4?
Take the given weight (784.616g) and divide it by the atomic weight of H2SO4.
The atomic mass can be found under the element symbol on the periodic table. You must add the atomic mass for each element in H2SO4 to get the total. The total atomic mass for H2SO4 will be about 98g.
Then divide the weight by this number.
784.616g/98g = 8.006 moles
Therefore, there is approximately 8 moles.
How do we know that the
substance is not water?
help me please i nedd hep
Answer:
7 to 5
Explanation:
power of 500 to 5
What would be the effect on the boiling point if you decrease the pressure over a liquid?.
Answer:
The boiling point will be reduced
Explain any periodic trends you discovered in the 6 physical properties you investigated.
pls help.
Answer:
Periodic trends are specific patterns that are present in the periodic table that illustrate different aspects of a certain element, including its size and its electronic properties. Major periodic trends include: electronegativity, ionization energy, electron affinity, atomic radius, melting point, and metallic character. Periodic trends, arising from the arrangement of the periodic table, provide chemists with an invaluable tool to quickly predict an element's properties. These trends exist because of the similar atomic structure of the elements within their respective group families or periods, and because of the periodic nature of the elements.
Explanation:
Electron Affinity:
electron affinity is the ability of an atom to accept an electron. Unlike electronegativity, electron affinity is a quantitative measurement of the energy change that occurs when an electron is added to a neutral gas atom. The more negative the electron affinity value, the higher an atom's affinity for electrons.
Electron affinity generally decreases down a group of elements because each atom is larger than the atom above it (this is the atomic radius trend, discussed below). This means that an added electron is further away from the atom's nucleus compared with its position in the smaller atom. With a larger distance between the negatively-charged electron and the positively-charged nucleus, the force of attraction is relatively weaker. Therefore, electron affinity decreases. Moving from left to right across a period, atoms become smaller as the forces of attraction become stronger. This causes the electron to move closer to the nucleus, thus increasing the electron affinity from left to right across a period.
Electron affinity increases from left to right within a period. This is caused by the decrease in atomic radius.
Electron affinity decreases from top to bottom within a group. This is caused by the increase in atomic radius.
Water in ethanol solution which one of them is solvent?
Answer:
The mixture of ethanol and water is a liquid-liquid solution. The solvent is Water.
Explanation:
Which substance is completely consumed in a chemical reaction?.
Lab Report: Solubility
Please!! Quick hurry!!
Answer:
degree to which a substance dissolves in a solvent to make a solution
is this ok
Answer:
Have Fun
Explanation:
hello people ~
Select the correct option from the given statements.
A. Polymers cannot form fibres
B. Polymers can be both natural and synthetic
C. Polymer is a natural substance
D. Polymer is a synthetic substance
Answer:
Polymer can be both natural and synthetic
Explanation:
Natural polymers are found from nature like silk and woolArtificial polymers are made in lab. such as polyester ,nylon. Which of the four can trap the greatest amount of heat?
Oxygen gas
Nitrogen gas
Carbon dioxide
Orone
Answer:
CO2
Explanation:
As CO2 soaks up this infrared energy, it vibrates and re-emits the infrared energy back in all directions.
a. Give the name of the element represented
b. Write the electron configuration
c. Identify the number of valence electrons
d. If this atom becomes a 1-ion, what would the electron configuration be?
Answer:
1)Br
2)Ar[4s,3d,4p1]
3) 7e
4) kr
is this true or false?
Answer:
I think it's true
Explanation:
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Which of the following would best be classified as a chemical change? *
Firecracker explosion
Freezing water into ice
Magnetizing a nail
Alcohol evaporating on your skin
chemistry is a natural science that deals with the study of?
Please help brainiest is award.
Answer:
4
Explanation:
nonmetals are brittle and dull.
Which statement correctly describes why a compound is a pure substance?
A compound is not a pure substance because each of its molecules is made up of the atoms of two or more different elements.
A compound is a pure substance because its molecule cannot be broken down into simpler particles by physical means.
A compound is not a pure substance because it is not an element, and only elements are pure substances.
A compound is a pure substance because it consists of two different elements, which are pure substances.
Answer:
The second statement
Explanation:
Because it can't be broken by physical means
A compound is a pure substance because its molecule cannot be broken down into simpler particles by physical means. Therefore, option B is correct.
What is pure substance ?A kind of matter with a predictable chemical composition and physical properties is referred to as a chemical substance. According to certain references, chemical substances cannot be physically divided into their component parts.
A pure material has a predictable chemical make-up. A material is the same everywhere it is sampled. The safest pure examples for chemistry homework are elements and compounds. Gold, silver, helium, sodium chloride, and pure water are a few examples.
Water only includes one kind of molecule, making it a pure substance. Only molecules made up of one oxygen atom joined covalently to two hydrogen atoms can be found in pure water.
Thus, option B is correct.
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What is the average pH of the Pacific Ocean between Pago Pago and Apia?
Answer:
Average ocean pH is now 8.1 and varies seasonally
Explanation:
1. What is the apparatus used to measure production in plants ?
Answer: Auxanometer
Explanation:
An auxanometer (Gr. auxain= "to grow" + metron= "measure") is an apparatus for measuring the increase of growth in plants. Sensitive auxanometers allow measurement of growth as small as a micrometer, which allows measurement of growth in response to short-term changes in atmospheric composition.
I hope this helps!
Answer:
An auxonometer is used to measure production in plants
Below is the Hertzsprung-Russell Diagram. According to the diagram which type of star is located at 3,500K and 10^6 Luminosity?
options:
blue giant
white dwarf
red super giant
red giant
Answer:red super giant
Explanation:
just look off the sides
Which type of glassware should you use to make this solution, assuming that the accuracy of the concentration is important
Pipettes and volumetric flasks are types of glassware to be used where accuracy of the concentration is important.
What are Glasswares?These are usually made of glass and are involved in scientific processes in the laboratory.
Glasswares such as Pipettes and volumetric flasks have standard readings which ensures that the accuracy of a measurement is guaranteed.
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The average
energy of a gas depends
on its temperature.