a. The metal known as cobalt forms cobalt III oxide and cobalt II oxide when it react with oxygen.
b. The ionic charge on the metallic copper is +2
How cobalt III oxide is formedWhen cobalt II oxide reacts with oxygen, it results in the formation of cobalt III oxide.
The balanced chemical equation is given below.
4CoO + O₂ → 2Co2O₃
The ion on metallic is plus 2 charge, it is on this premise that the ionic charge on the metallic copper is confirmed as +2.
So therefore, when cobalt is combines with air, it forms a binary compound known as cobalt II oxide and tricobalt tetroxide.
O₂
Complete question:
a. What compounds does cobalt metal forms?
b. What is the charge on copper ion?
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a student wrote this name for a compound made of calcium and sulfer. Sulfer calcium. What is wrong with this name? Write the correct name for the compound.
Answer: Should actually be Calcium Sulfide
Explanation: Alkali metal + non metal = salt.
2nd element in compound should either end in -ide or
3- Which substance is not a macromolecule?
A diamond
B graphite
C silicon(IV) oxide
D sulfur
Answer:D
Explanation:plato
suppose you have a solution that is made by combining 25 grams of salt (the solute) with 75 grams of water (the solvent). what is the mass percent of the salt?
The mass percent of the salt is 33.33%
How does mass percent chemistry work?The percentage of a solution's mass that is made up of solutes is known as the mass percent. This percentage is measured in relation to the total mass of the solution.
The term "mass percent composition" also refers to weight percentage. It is referred to as w/w%. The formula for mass percent in a solution is the mass of an element in one mole of the compound divided by the compound's molar mass, then multiplied by 100%.
Total mass of solution = 75g
The mass percent of the salt= 25/75×100%
The mass percent of the salt= 33.33%.
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9. suppose you are analyzing an unidentified spread that has qualities of butter. how could determining whether or not the product was hydrogenated help you to identify the item?
We will be able to tell if the spread is margarine if it has been hydrogenated.
A liquid unsaturated fat can be made into a solid fat by the process of hydrogenation. In order to make an unsaturated fat saturated, hydrogen atoms must be injected into it. Trans fat, a particular form of fat, is created during this hydrogenation process.
An unsaturated fat undergoes hydrogenation, changing from a liquid to a solid. Unsaturated fats become saturated ones as a result of this process. The remaining unsaturated fats undergo another molecular shape change during this phase. An "trans" form is the end outcome.
We must maintain both of them at room temperature in order to analyze the unidentified spread. The process of hydrogenating corn oil results in the production of margarine.
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Why is this canyon an example of how the surface of Earth changes slowly map test question
This canyon is an example of how the surface of Earth changes slowly due to the slow and gradual process of erosion by water and wind.
What process is responsible for the slow change in the surface of Earth demonstrated by the canyon in the given question?The slow and gradual process of erosion by water and wind is responsible for the slow change in the surface of Earth demonstrated by the canyon.
How does the canyon serve as an example of the slow change in the surface of Earth?The canyon demonstrates how the surface of Earth changes slowly due to the process of erosion by water and canyon, which gradually wear away the rock and reshape the landscape over millions of years.
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1. What are the units remaining after the conversions below? 35 POINTS
The units that are left in each case are;
1) mile
2) atoms
What are conversion factors?The term conversion factor has to do with the way that we are able to use a given set of numbers to be able to help us to convert from one unit to another. This is very important especially when we are dealing with something that involves calculations and makes the use of computational methods very easy.
Let us now look at the image that has been shown in the question. We have to recall that some units have to cancel out so that we can be able to get the target unit that we are looking for in the course of the conversion as shown.
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question related to relative atomic mass
please show the working!
Answer:
Element XX has a relative atomic mass of 6.86 aum
Explanation:
See attached worksheet.
what do sanding a piece of wood and rain forming into a cloud have in common
As a result, it is a natural bodily alteration. The chemical shape of the material is affected by physical changes, but not its makeup.
What kind of change is cloud formation?Since natural water undergoes a phase transformation cycle from liquid to gas and back to liquid, the production of clouds is a physical shift.
The physical conversion of water from vapour to liquid during cloud formation is known as condensation. When water evaporates during the evaporation process and condenses in the air to form clouds, there is a physical shift that takes place.
Condensation is the process by which water transforms from a gas to a liquid, whereas deposition is the process by which a gas transforms straight into a solid. Clouds are created by these two processes.
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a soluble iodide was dissolved in water. then, an excess of silver nitrate, , was added to precipitate all of the iodide ion as silver iodide, . a question content area if 2.940 g of the soluble iodide gave 1.329 g of silver iodide, how many grams of iodine are in the sample of soluble iodide?
In the sample of soluble iodide, 0.7183 grams iodine are present.
To find the concentration of iodine in grams we must known about molar mass of Silver and molar mass of Iodine.
Molecular weight of Ag = 107.86
Molecular weight of I = 126.90
Molecular weight of = 107.86 + 126.90 = 234.76
Percentage of I in [tex]AgI[/tex] is = (126.90/234.77) x 100 = 54.05%
so we can convert percentage of Iodine in silver iodide into grams by using formula percentage of Iodine/100x grams of silver Iodide.
so,Concentration of Iodine in grams=[tex]\frac{54.05}{100}[/tex]×1.329
=0.5405x1.329
=0.7183g
1.329g of [tex]AgI[/tex] contains 0.7183g of iodine in soluble Iodide.
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Describe the composition of calcite
Answer:
CaCO3
Explanation:
Pure calcite has the composition CaCO3. However, the calcite in limestone often contains a few percent of magnesium. Calcite in limestone is divided into low-magnesium and high-magnesium calcite, with the dividing line placed at a composition of 4% magnesium. High-magnesium calcite retains the calcite mineral structure, which is distinct from that of dolomite, MgCa(CO3)2.[18] Calcite can also contain small quantities of iron and manganese.[19] Manganese may be responsible for the fluorescence of impure calcite, as may traces of organic compounds
8. 00 g of ethane gas, c2h6, is burned in oxygen. What volume of carbon dioxide gas is produced at 1. 00 atm and 25. 0°c?.
Answer:
Explanation:1 g CH
4
,C
2
H
6
C
3
H
8
C
4
H
10
T = 350 K, P = 1 atm
PV=nRT=
M
w×R×T
1×V=
58
1
×0.0821×350
V=0.495 L
V=495cm
3
Four atoms of element X have the same mass as one atom of bromine.
(i) What is the relative atomic mass of element X?
80
(ii) Name element X.
(c) Eight atoms of element Y have the same mass as two atoms of silicon.
(i) What is the relative atomic mass of element Y?
56
(ii) Name element Y.
Answer:
Neon and lithium.
Explanation:
4x = 79.9 atomic mass
x = 19.98 atomic mass
The element having the nearest atomic mass to 19.98 is neon with an atomic mass of 20.180.
==
8y = 2*(28.085)
8y = 56.17
y = 7.021
The element having the nearest atomic mass to 7.021 is lithium with an atomic mass of 6.94..
Click here to view a list of the common polyatomic ions. what is the formula for ammonium sulfate? nh4so4 na2so3 (nh4)2so4 na2so4
Option C ;(NH4)2SO4 is the formula for ammonium sulfate.
It is an inorganic salt. It appears as fine white crystals. Its molecular weight is 132.14g/mol. Its density is 1.77g/cm³.It has many commercial uses. It is mainly used as fertilizer for alkaline soils because ammonium ions forms small amounts of acid which lowers the pH of the soil.
It is acidic with pH of 5.5. Its melting point is 235 °C. it is soluble in water. It is obtained by the reaction of sulfuric acid with ammonia. Sulfuric acid will react with two equivalents of ammonia.
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Answer:
C. (NH4)2SO4
And the second question is
A. KOH
Explanation:
New crust is found at the center of the _____, proving the movement of the seafloor and the surface of the Earth.
A. ocean
B. Himalayan Mountains
C. Earth
D. mid-ocean ridge
New crust is found at the center of the mid-ocean ridge, proving the movement of the seafloor and the surface of the Earth and is denoted as option D.
What is Mid-ocean ridge?
These are structures which are formed where two tectonic plates are spreading apart and therefore forms the seafloor which is present in larger types of water bodies such as sea, oceans etc.
There is also the presence of new crust at the center and it helps to prove movement of the surface of the earth which is therefore the reason why it was chosen as the correct choice.
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I need help ASAP, please!!!
Kyle performed the following sequence of tests with a solution of Fe2+ ions:
(i)To a solution of iron (II) he added a little dil.H2SO4 , then hydrogen peroxide solution very slowly. He retained the mixture.
(ii) To the mixture that was retained he added sodium hydroxide.
Predict and explain what Kyle would observe in both steps in the above reaction sequence.
In the chemical reaction between Fe(II) ions and dilute sulfuric acid when hydrogen peroxide is added Fe(II) gets converted to Fe(III) ,on retaining mixture and adding NaOH precipitate of ferric hydroxide is obtained.
What is chemical reaction?Chemical reactions are defined as reactions which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical reaction.
There are several characteristics of chemical reactions like change in color, change in state , change in odor and change in composition . During chemical reaction there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
There are three types of chemical reactions:
1) inorganic reactions
2)organic reactions
3) biochemical reactions
During chemical reactions atoms are rearranged and changes are accompanied by an energy change as new substances are formed.
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What is flow of lava called?
Answer:
Clinkers
Explanation:
Clinkers are generally considered to form by fragmentation of an upper vesiculated crust due to an increase in apparent viscosity and/or to an increase in shear strain rate
hydrogen has two stable isotopes, 1 1h and 2 1h, and sulfur has four stable isotopes, 32 16s, 33 16s, 34 16s, and 36 16s. how many peaks would you observe in the mass spectrum of the positive ion of hydrogen sulfide, h 2 s 1 ? assume no decomposition of the ion into smaller fragments.
There would be seven peaks if you could observe them all while considering no decomposition of the ion into smaller fragments.
Each sulfur isotope would give a peak so there are three possible combinations of the hydrogen isotopes:
H-H (m/z = 2), H-D (m/z = 3) and D-D (m/z = 4).
Thus, you will find 4 × 3 = 12 components for the molecular ion.
However, some of these peaks will overlap each other so the stable isotopes of sulfur have masses 32, 33, 34, and 36.
Thus, the expected peaks will be:
32S:m/z=34,35,36
33S:m/z=35,36,37
34S:m/z=36,37,38
36S:m/z=38,39,40
If every peak were visible, you would see seven peaks in total.
They would have m/z = 34, 35, 36, 37, 38, 39, 40.
Isotope peaks are ionic parts of the same chemical equation that are more often than not visible to different adjoining crests inferable to particles of distinctive isotopic compositions.
The number of isotope crests and the relative concentration of each crest depends on the chemical equation of the ionic part and the normal isotopic composition of its constituent components.
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How thick is the Earths crust in kilometers?
Answer:
The Earth's Crust is like the skin of an apple. It is very thin in comparison to the other three layers. The crust is only about 3-5 miles (8 kilometers) thick under the oceans(oceanic crust) and about 25 miles (32 kilometers) thick under the continents (continental crust).
Explanation:
you butt is thick in kilometers
;)
Calculate the root mean square velocity for the atoms in a sample of helium gas at 25°C
The gas constant is equal to R=8.314 J/mol K, while the atomic mass of helium is equal to M=4.0 g/mol. M = 4.0 g / m o l . As a result, the helium atom's rms speed is 1304.7 m/s. So, 515 m/sec is the root-mean-square speed.
What is root mean square velocity?The value of the square root of the sum of the squares of the stacking velocity values divided by the quantity of values is the root-mean square (RMS) velocity. The RMS velocity is the speed of a wave traveling along a certain ray path across subsurface strata with various interval velocities.
The expression v=sqrt(3RTM) and v=sqrt(3KTm), where R is the universal gas constant, T is the absolute (Kelvin) temperature, m is the molar mass, K is the Boltzmann's constant, and M is the molecular mass, gives the root mean square (R.M.S.) speed V of the molecules of an ideal gas.
Since the particles in a typical gas sample are flowing in all directions, the average velocity for that sample is zero, which is why we use the rms velocity instead of the average. This is an important formula since the particle velocity controls both the diffusion and effusion rates.
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Need this done by 10:20
I am doing an assignment for science but i messed up my char on the elements can someone fix it for me please ( WILL ALSO GIVE BRAINLIEST )
VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV
Answer: The part I think you messed up on is the atoms not all of them have 0 and 1. Sodium Chloride has 2 atoms. Other than that it looks amazing! Hope this helps!
What is the measurement on this graduated cylinder
Answer: 4.3
Explanation:
You read from the bottom of the meniscus and each line equals .1 so it reads 4.3.
help me out please and thank you
Answer:
Explanation:
nitrogen dioxide and calcium oxidedispersion forces are the only type of intermolecular force exhibited by atoms and by molecules. without the existence of dispersion forces, such substances would only exist as
London dispersion forces would be the only intermolecular force holding two methane molecules together.
The least powerful intermolecular force is the London dispersion force. When the electrons in two nearby atoms occupy positions that cause the atoms to temporarily form dipoles, the consequence is the London dispersion force, a transient attractive force. The term "induced dipole-induced dipole attraction" is frequently used to describe this effect.
Argon, hydrogen gas, fluorine gas, and methane are non-polar particles that solely have London dispersion forces between their atoms or molecules.
When molecules and/or ions are sufficiently close to one another, it is presumed that these dispersion forces exist between all of them. It is believed that ions and dipoles produce stronger, farther-reaching electrical forces that work in addition to those already mentioned.
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you can find the specific gravity of a substance by dividing its density by
Density of a substance is the ratio of its mass to volume. Specific gravity of the substance is the ratio of its own density to the density of water. Thus, dividing its density by density of water.
What is specific gravity?Specific gravity of an object is the ratio of its density to the density of water. In fact it is related to the gravity itself in water. This ratio determines whether the object float or sink to the bottom of water.
If the specific gravity is greater than one, which means the object is denser than water and it will sink to the bottom of water because of its weight. If the specific gravity is less than one, then the object have less density than water and it will float on water.
All the floating objects have a specific gravity of less than one. Irrespective of the weight of the objects they floats because of their higher density than water.
Ice floats on water where a stone will sink. Similarly large ships, canoes etc are floating because of their smaller specific gravity. This way we can compare the floating property using specific gravity.
Therefore, specific gravity of a substance can be found by dividing its density by the density of water.
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Melting and boiling points of a pure liquid
are........ physical quantities, whereas mass
and volume are........... physical properties.
Melting and boiling points of a pure liquid are intensive physical quantities whereas mass and volume are fundamental physical quantities.
What is melting point?The typical definition of the melting point is the temperature at which a substance transforms from a solid to a liquid.
The temperature at which a liquid under atmospheric pressure changes from a solid to a liquid is known as its melting point. Here, both the liquid and solid phases coexist in equal amounts. The substance's melting point is listed under standard pressure, although it varies with pressure as well.
What is boiling point?The temperature at which a liquid's vapour pressure equals the surrounding atmosphere is known as the boiling point of the liquid. This temperature causes the liquid to become a vapour.
The boiling point of the liquid is influenced by the atmospheric pressure. When a liquid is at high pressure, its boiling point is higher than when it is at atmospheric pressure. Different liquids have variable boiling points at a specific pressure. The standard boiling point of a liquid was established by IUPAC in 1982 as the temperature at which a liquid starts to boil at a pressure of one bar.
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how does the synthesis of mendelevium differ from that of californium?
Mendelevium and californium , both synthesize differently because Mendelevium is a synthetic element and californium is a radioactive chemical element.
What is mendelevium and californium and how do they synthesize?Mendelevium is metallic radioactive transuranium element . It is in the actionoid that is in the actinide series.Mendelevium is an element which was produced by the cyclotron and was all night experiment.Doing the same for longer period of time produces thousands of mendelevium atoms.Californium are made by firing helium nuclei at curium-242, and this process yield the isotope californium-245 .Californium-245 has a half live of 44 minutes and was initially produced 5000 atoms of californium.To know more about californium visit:
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Summarize the formation of a base.
Bases can be formed by the direct combination of the elements that form the bases.
What are bases?Bases are substances that react with acids to form salt and water only.
Bases are usually oxides or hydroxides of metals.
Bases have the property of turning red litmus blue.
The formation of a base will involve the direct combination of the constituent elements.
For example, the formation of the bases magnesium oxide and ammonia is shown below:
Ammonia: N₂+ 3 H₃ ---> 2 NH₃
Magnesium oxide: 2 Mg + O₂ ---> MgO
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when 2.0 mol h2 and 2.0 mol i2 are placed in a reaction vessel and allowed to come to equilibrium, the mixture is found to contain 2.5 mol hi. how many moles of each substance are present in the equilibrium mixture, i.e. what is the composition?
The composition of the mixture is 2.5 moles of HI, 0.75-mole I₂, and 0.75 moles of H₂.
The act of combining elements or elements to shape an entire. the ensuing nation or product. manner of being composed; structure: This portrait has an orderly composition. make-up; constitution: His ethical composition becomes impeccable.
A composition can discuss with any innovative painting, be it a quick story, poem, essay, studies paper or a piece of tune. consequently, the principle difference between essay and composition is that essay is a form of composition whereas composition refers to any innovative paintings.
H₂ + I₂ = 2HI
initial 2mol 2 0mol
final 2.5 mol
limiting reagent is I₂
2 mole of HI is produced by 1 mole of I₂
2.5 mole of I₂ is produced by = 1/2 × 2.5
= 1.25 mole
The final composition of the mixture = 2.5 moles of HI, 0.75-mole I₂, and 0.75 moles of H₂.
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Identify the period, group, and valence electrons block of each element.
Problem:
[Ne] 3s² 3p5
P-5, G-17, p
P-6, G-6, d
P-7, no group, f
P-3, G-17, p
P-3, G-14, p
The period, group, and valence electrons block of the given element with the electronic configuration [Ne] 3s² 3p5 is Period 3, Group 7, p-block.
What are the periods and groups in the Periodic Table?The periods in the periodic table are the horizontal rows found in the periodic table.
There are 7 periods in the Periodic Table.
Elements in the same period have the same number of electron shells.
The groups in the periodic table are the vertical columns found in the periodic table.
There are 18 periods in the Periodic Table.
Elements in the same group have the same number of valence electrons.
The electronic configuration of atoms can be used to identify the group and period each element belongs to.
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