Answer:
appearance
( C)
hope you like?!!
Answer: C, appearance
Explanation: Gradpoint
Find the number of moles in 25.0g of ammonium
Answer:
1.389 moles
Explanation:
We are given that
Given mass of ammonium=25.0 g
We have to find the number of moles in 25.0g of ammonium.
The chemical formula of ammonium [tex]NH^{+}_4[/tex]
Molar mass of N=14, Molar mass of H=1
Molar mass of ammonium (NH4+)=14+4(4)=18 g/mol
We know that
Number of moles=Given mass/Molar mass
Using the formula
Number of moles of ammonium=[tex]\frac{25}{18}[/tex]moles
Number of moles of ammonium=1.389 moles
Hence, the number of moles in 25.0g of ammonium=1.389 moles
compound composed of cations and anions the forces of attraction that bind oppositely charged ions together lowest whole-number ratio of ions in an ionic compound a depiction of the valence electrons as dots around the symbol for an element a mixture of two or more elements, at least one of which is a metal the attraction of the free-floating valence electrons for the positively charged metal ions ions of the halogen atoms the electron(s) in the highest occupied energy level of an atom the number of ions of opposite charge that surround each ion in a crystal Atoms in a compound tend to have the electron configuration of a noble gas. Shows the kinds and numbers of atoms in the smallest representative unit of a substance a. halide ions b. alloy c. octet rule d. formula unit e. electron dot structure f. ionic compound g. ionic bonds h. coordination number i. chemical formula j. valence electrons k. metallic bond
Answer:
compound composed of cations and anions the forces of attraction that bind oppositely charged ions together - ionic compound
lowest whole-number ratio of ions in an ionic compound - formula unit
a depiction of the valence electrons as dots around the symbol for an element - electron dot structure
a mixture of two or more elements, at least one of which is a metal - alloy
the attraction of the free-floating valence electrons for the positively charged metal - metallic bond
ions of the halogen atoms - halide ions
the electron(s) in the highest occupied energy level of an atom - valence electrons
the number of ions of opposite charge that surround each ion in a crystal - coordination number
Atoms in a compound tend to have the electron configuration of a noble gas - octet rule
Shows the kinds and numbers of atoms in the smallest representative unit - chemical formula
Explanation:
An ionic compound is composed of oppositely charged ions held together in a crystal lattice. The lowest whole-number ratio of ions in an ionic compound is known as the formula unit. The number of ions of opposite charge that surround each ion in a crystal is called the coordination number. Ions of the halogen atoms are negatively charged and are called halide ions
Elements are composed of atoms, the electron(s) in the highest occupied energy level of an atom are called valence electrons. In metals, the attraction of the free-floating valence electrons for the positively charged metal is called the metallic bond. For atoms of elements, a depiction of the valence electrons as dots around the symbol for an element is called the electron dot structure or Lewis structure.
A combination of elements may be a compound or an alloy. An alloy usually contains at least one metal. For compounds, the chemical formula Shows the kinds and numbers of atoms in the smallest representative unit. Atoms form compounds because atoms in a compound tend to have the electron configuration of a noble gas this is the octet rule.
The correct match of the given statement are 1 - f. ionic compound, 2- d. formula unit, 3 - e. electron dot structure, 4- b. alloy, 5- k. metallic bond, 6- a. halide ions, 7- j. valence electrons, 8- h. coordination number, 9 - c. octet rule, 10- i. chemical formula.
Ionic compounds are made up of oppositely charged ions that are kept together in a crystal lattice. The formula unit is the lowest whole-number ratio of ions in an ionic compound.
The coordination number is the number of ions with opposite charges that surround each ion in a crystal. Halide ions are halogen atom ions that are negatively charged.
Elements are made up of atoms, and the electron(s) in the atom's highest occupied energy level are known as valence electrons. The metallic bond refers to the attraction of free-floating valence electrons to positively charged metals in metals.
The electron dot structure or Lewis structure is a representation of the valence electrons as dots around the symbol for an element for atoms.
A compound or an alloy is a mixture of components. A metal is frequently present in an alloy.
The chemical formula is used for compounds. The types and numbers of atoms in the smallest representative unit are displayed.
The octet rule states that atoms in a compound tend to have the electron configuration of a noble gas.
Therefore, the correct matches are: 1 - f. ionic compound, 2- d. formula unit, 3 - e. electron dot structure, 4- b. alloy, 5- k. metallic bond, 6- a. halide ions, 7- j. valence electrons, 8- h. coordination number, 9 - c. octet rule, 10- i. chemical formula.
Learn more about ionic compound, here:
https://brainly.com/question/30420333
#SPJ6
The given question is incomplete, so the most probable complete question is,
Match the correct statement with their appropriate terms:
Compound composed of cations and anions, the forces of attraction that bind oppositely charged ions together.Lowest whole-number ratio of ions in an ionic compound.A depiction of the valence electrons as dots around the symbol for an element.A mixture of two or more elements, at least one of which is a metal.The attraction of the free-floating valence electrons for the positively charged metal.Ions of the halogen atoms.The electron(s) in the highest occupied energy level of an atom.The number of ions of opposite charge that surround each ion in a crystal.Atoms in a compound tend to have the electron configuration of a noble gas.Shows the kinds and numbers of atoms in the smallest representative unit.Please please help me with answer I will give you Brainly
Answer:
no se lo siento nesesito puntos
5 Describe how seawater forms layers
Answer:The ocean forms layers because the water has different density throughout. 2. Water with higher density sinks to the bottom while water with lower density sits on the top. ... Low-density water tends to be warmer and less saline, while high-density water is generally cooler and more saline.
Explanation:
A 50.0 g sample of liquid water at 56.0°C, heats to 91.0 "C. How much energy is
involved in this change? (Heat capacity of liquid water is 4.17 J/gºC) (Q
=mcAT)
A. 7298 J B. 12038 J
C. 204480 J D. 17807 J
Answer:
A
Explanation:
using
mC∆t
50×4.17×(91-56)
=50×4.17×35
=7297.5
~ 7298 J
Strontium 92 undergoing beta decay. Express your answer as a nuclear equation.
Answer: The nuclear equation for the beta decay is
⁹²₃₈St-------->⁹²₃₉Y + ⁰₋₁e
Explanation:
Beta decay(beta-minus and beta-plus.) occurs due to the fact that some atoms are unstable and to become stable must undergo a decay.
The beta decay that occurs in Strontium is a beta-minus decay,where it changes to another element since its atom gains a proton
A beta decay (beta minus) occurs when an atom emits beta particle ( ⁰₋₁e) Here in Strontium undergoing a beta(minus) decay, the mass number remains the same but a proton was gained. Hence the new isotope is Yttrium ⁹²₃₉Y .
⁹²₃₈St-------->⁹²₃₉Y + ⁰₋₁e
A methanol-water mixture is to be flash distilled at 1 atm. If the feed is 25 mole %methanol, what are the liquid and vapor compositions if:a) All of the feed is vaporized.b) None of the feed is vaporized.c) 1/3 of the feed is vaporized.d) 2/3 of the feed is vaporized.
Answer:
Explanation:
Given that:
The distillation is carried out at a pressure of 1 atm
The feed harbors 25% mole of methanol (z)
The total moles of feed is usually 100 moles
In the system, we have both methanol and water
Using the total mole balance for the distillation column.
Fz = Lx + Vy
where;
F = amount of feed
z = mole fraction of ethanol (in feed)
L = amount of liquid product out of the column
V = amount of vapor product out of the column
x = mole fraction of methanol out of the liquid
y = mole fraction of methanol out of the vapor.
SO;
(a)
If all the feed is vaporized, then the vapor will likely have the same composition as the feed.
(b)
If no vaporization of the feed takes place, then the bottoms moving out of the column contains the same composition as the feed.
(c)
If 1/3 of the feed is vaporized; then 2/3 of the feed is at the bottom.
The balance equation would be:
[tex]Fz = (\dfrac{2}{3}F) x + (\dfrac{1}{3}F)y \\ \\ z = \dfrac{2}{3}x+\dfrac{1}{3}y[/tex]
Replacing z = 0.25; we have:
[tex]0.25 = \dfrac{2}{3}x+\dfrac{1}{3}y[/tex]
0.75 = 2x + y
(d)
If 2/3 of the feed is vaporized;
Then:
[tex]Fz = (\dfrac{1}{3}F) x + (\dfrac{2}{3}F)y \\ \\ z = \dfrac{1}{3}x+\dfrac{2}{3}y[/tex]
replacing z = 0.25
[tex]0.25 = \dfrac{1}{3}x+\dfrac{2}{3}y[/tex]
0.75 = x + 2y
What are the layers of the Earth
Hello! Here is your answer!
Crust, Upper Mantle, Lower Mantle, Outer Core
I hope this helped if it did please mark brainlist!
Answer:
They are in order from exterior to the interior - the crust, the mantle, the outer core, and the inner core.
I am a teacher in a college in a large city in China. One day, some students asked me to join
them for dinner. They said they wanted to take me to a very special restaurant that had
just opened. This new place served American food. The students were proud that their city
had a restaurant that served fine American food. I was quite surprised when we got to the
restaurant. My students had taken me to a very well-known fast food restaurant!
1.
In the paragraph above, the author's purpose is to
А. inform.
B
entertain
share personal experiences
C
D
persuade
Answer:
c or b
Explanation:
the story is entertaining and it shares the teachers personal experiences with the teachers students
Key Questions and Terms Notes
The way that light waves interact with different mediums is called the ________.
When does reflection occur?
Light reflects off of the medium at a ________ angle to which it initially struck the material. This means that if light hits a mirror at a 40-degree angle, it will bounce off at a ___ degree angle. Draw a picture of what this looks like.
When does refraction occur?
When light can pass through an object, it is called ________.
When does absorption occur?
Describe how visible light interacts with these materials:
Mirror:
Glass of water:
Dark fabric:
What are some examples of matter waves?
What are some examples of electromagnetic waves?
How are electromagnetic waves different from matter waves?
Would outer space be an ideal spot for a concert? Why or why not?
________ waves need to interact with particles of either a solid, liquid, or gas to travel.
Light Waves and Sound Waves
Record your findings about sound and light waves for each of the following.
Traveling through air
Traveling through metal
Why light travels faster
Answer:
Following are the solution to the given question:
Explanation:
Its interactions among light waves as well as different media were also called light products.Even before sound rays hit a medium, the light rays bounce off.Even at a similar angle with which the material initially struck its medium, sunlight reflecting.When the light hits a mirror at such an angle of forty degrees, everything just rebonds at an angle of 40 degrees.When light waves pass via a transparent medium, those who bend as well as change their direction.Light is called transparent if it can pass via an object.Whenever light waves strike a platform, this is neither re-elected nor refracted, nor expected to move.The light of interacts with these materials are:Reflection Mirror:
Water glass: refractive
Dark fabricate: Absorption
Sound waves and waves of water are examples of matter waves.Light waves and X-rays are electromagnetic waves.There is no need for sound radiation to pass through a medium/requirement to communicate with other particles to travel like waves of matter.No, even though sound waves didn't reach through the space vacuum.Matter waves should interact with solid, liquid, or gas particulates to travel.The light waves pass thru the air more quickly than sound waves.
Sound waves almost always go through a metal frame.
Light waves travel faster than electrical signals even though they don't have to crash in electromagnetic waves to particles.
How does Earth's rotation affect ocean currents! It causes them to flow in a curved path. It causes them to flow from north to south It causes them to flow from east to west. None of the above
Answer:
But because the Earth rotates, circulating air is deflected. Instead of circulating in a straight pattern, the air deflects toward the right in the Northern Hemisphere and toward the left in the Southern Hemisphere, resulting in curved paths. This deflection is called the Coriolis effect.
The Coriolis effect describes how Earth's rotation steers winds and surface ocean currents. ... The Coriolis effect causes the path of a freely moving object to appear to curve. This is because Earth is rotating beneath the object. So even though the object's path is straight, it appears to curve.
Explanation:
PLEASE HELP!! PLEASE HELP PLEASE HELP PLEASE HELP!!!
CHEMISTRY DIMENSIONAL ANALYSIS DUE IN 5 MINUTES!!!!
Answer:
37.6 Km/h
Explanation:
From the question given above, the following data were obtained:
Distance = 100 m
Time = 9.58 s
Speed =?
Next, we shall convert 100 m to Km. This can be obtained as follow:
1000 m = 1 Km
Therefore,
100 m = 100 m × 1 Km / 1000 m
100 m = 0.1 km
Next, we shall convert 9.58 s to h. This can be obtained as follow:
3600 s = 1 h
Therefore,
9.58 s = 9.58 s × 1 h / 3600 s
9.58 s = 2.66×10¯³ h
Finally, we shall determine the speed. This can be obtained as follow:
Distance = 0.1 km
Time = 2.66×10¯³ h
Speed =?
Speed = Distance / Time
Speed = 0.1 / 2.66×10¯³
Speed = 37.6 Km/h
A group of scientists is conducting an investigation to study the conductivity of perovskite. At which temperature do they need to perform the experiments for perovskite to conduct electric current?
Answer:
t=1980C AND T>1980C
Explanation:
The following are all examples of good titration reactions with the exception of _____________. (7-2) Group of answer choices Ammonia (NH3) titrated with HCl titrant. Formic acid titrated with ammonia (NH3) as a titrant. I- titrated with Ag titrant, forming a complex with a tiny Ksp. Potassium Hydrogen Phthalate (KHP) titrated with NaOH titrant. NaOH titrated with HBr titrant.
Answer:
Formic acid titrated with ammonia (NH3) as a titrant
Explanation:
We have to look at something very critical here and that is, considering whether the acid/ base is strong or weak.
For a weak acid weak base titration, there is no suitable indicator neither is there any sharp pH range because no sharp change occurs. So, for a weak acid-weak base titration, there is only a very small change in pH at the equivalence point. This makes it impractical to carry out a weak acid- weak base titration.
Formic acid is a weak acid and ammonia is a weak base. Hence, Formic acid titrated with ammonia (NH3) as a titrant is a bad titration
Consider the following reaction: Cd (s) AgCl (aq) --> CdCl2 (aq) Ag (s) In this reaction, a. electrons are transferred from silver in AgCl (aq) to Cd (s) b. electrons are transferred from Cd (s) to silver in AgCl (aq) c. no electrons are transferred since the oxidation number of chlorine atoms does not change d. the oxidizing agent is Cd (s) e. the reducing agent is AgCl (aq)
Answer:
a. electrons are transferred from silver in AgCl (aq) to Cd (s)
Explanation:
In this reaction Ag is reduced:
Ag⁺ + 1e⁻ → Ag⁰While Cd is oxidized:
Cd⁰ → Cd⁺² + 2e⁻With those two semi-reactions we can see that there's a transfer of electrons from silver in AgCl(aq) to the solid cadmium.
For the record, given that Ag was reduced, Cd was the reducing agent. And because Cd was reduced, Ag was the oxidizing agent.
study the image wich shows an air mass moving into a region wich type of weather will this region most likely experience due to the incoming air mass
Answer:
766ijn
Explanation:
hovibibbunununububububyhybyybybnu
What is gold atomic number
Answer:
79
Explanation:
A variation of the indicator-dilution method (see preceding problem) is used to measure total blood volume. A known amount of a tracer is injected into the bloodstream and disperses uniformly throughout the circulatory system. A blood sample is then withdrawn, the tracer concentration in the sample is measured, and the measured concentration [which equals (tracer injected)/(total blood volume) if no tracer is lost through blood vessel walls] is used to determine the total blood volume. In one such experiment, 0.60 \mathrm{cm}^{3}0.60cm 3 of a solution containing 5.00 mg/L of a dye is injected into an artery of a grown man. About 10 minutes later, after the tracer has had time to distribute itself uniformly throughout the bloodstream, a blood sample is withdrawn and placed in the sample chamber of a spectrophotometer. A beam of light passes through the chamber, and the spectrophotometer measure the intensity of the transmitted beam and displays the value of the solution absorbance (a quantity that increases with the amount of light absorbed by the sample). The value displayed is 0.18. A calibration curve of absorbance A versus tracer concentration C (micrograms dye/liter blood) is a straight line through the origin and the point (A=0.9, C=3 \mu \mathrm{g} / \mathrm{L})(A=0.9,C=3μg/L). Estimate the patient's total blood volume from these data.
Solution :
Given :
The spectrophotometer reading is (A) = 0.18
Absorbdance Vs Concentration follows a straight line relation passing throght the origin.
Let the relation be of the form A = mC -------(1)
where, A = absorbdance
C = concentration (μg/L)
For a given point, A = 0.9
C = 3 μg/L
From equation (1), we have
0.9 = m x 3
m = 0.3
Therefore the complete equation of the spectrophometer calibration curve becomes A = 0.3C
Now we have the relation relating the concenrtation of the traces and the absorbdance. Let us now calculate the concentration of the traces in sample for which A = 0.18.
[tex]$C = \frac{0.18}{0.3}$[/tex]
= 0.6
Traces concentration = 0.6 μg/L
Now in order to calculate the volume of the blood in a grown man we must know how much dye(mass) was injected into his blood.
For that it is given that the trace solution of 0.6 [tex]$cm^3$[/tex] and 5 μg/L was injected.
∴ Mass of the dye in solution injected [tex]$=\frac{5 \times 10^{-3} \times 10^6 \ \mu g\times 0.6 \ cm^3}{10^3 \ cm^3}$[/tex]
= 3 μg
This much of mass is diluted throughout the blood volume.
Thus if V(L) is total blood volume, then 0.6 μg/L x V = 3 μg
This means that the total mass of dye in the body is what we injected initially i.e. 3 μg and must be holding by V(L) of blood.
∴ [tex]$V=\frac{3\ \mu g}{0.6 \ \mu g/L}$[/tex]
= 5 L
(GIVING BRAINLIEST!!)
Identify and describe the different forms of precipitation shown in the images.
Answer:
snow, hail, rain
Explanation:
precipitation is the transfer of water in any form from the atmosphere to the land or sea surface
Forms of Precipitation. It can be liquid or solid; the main precipitation types are rain, sleet, snow, ice pellets, hail, and drizzle.
Why are there different forms of precipitation?There are different forms of precipitation based on atmospheric conditions. Warmer atmospheric conditions might result in rain, drizzle, or hail (if it's a thunderstorm). Colder atmospheric conditions might result in snow, sleet, freezing rain, or ice crystals.
What are the 4 main types of precipitation?The four main types of precipitation are rain, snow, sleet, and hail. Rain is liquid precipitation that falls during many parts of the year. Hail is associated with thunderstorms and generally falls in warmer temperatures. Snow and sleet are frozen and generally fall in colder temperatures.
Learn more about different forms of precipitation at
https://brainly.com/question/866725
#SPJ2
What type of reaction is shown here. NaCl + LiF = NaF + Lici*
Answer:
displacement reaction
Explanation:
more reactive sodium displaces lithium
NaCl + LiF ⇒ NaF + LiCl
What mass of iron is produced from adding 80.0 g of iron(II) oxide (71.85 g/mol) to 20.0 g of magnesium metal? FeO (l) + Mg (l) ----------> Fe (l) + MgO (s) Identify the limiting reactant, mass of iron produced and the mass in grams of the excess reactant used in this reaction. Remember to report the correct number of significant figures and units where appropriate. You need to show work in order to receive credit. Zero points will be awarded if logical work/explanation is not given. You must show your work by typing it into the provided test box. I will not look to your scratch paper for work.
Answer:
46.0g of Iron are produced
Explanation:
Based on the chemical reaction:
FeO(l) + Mg(l) → Fe(l) + MgO(s)
1 mole of Iron (II) oxide reacts per mole of Mg to produce 1 mole of iron
To solve this question we need to convert each mass of reactant to moles using its respectives molar masses in order to find limitng reactant. Moles of limiting reactant = Moles of iron produced:
Moles FeO (Molar mass: 71.85g/mol):
80.0g * (1mol / 71.85g) = 1.11moles FeO
Moles Mg (Molar mass: 24.305g/mol)
20.0g * (1mol / 24.305g) = 0.823 moles Mg
As moles of Mg < Moles FeO, Mg is limiting reactant and the moles of Fe are 0.823 moles.
The mass of Iron produced is:
0.823 moles Fe * (55.845g/mol) =
46.0g of Iron are produced
Which of the following has the strongest gravitational field?
A. the sun
B. the earth
C. a football player
D. a tree
Answer:
A
Explanation:
Answer:
the sun , option A hope it helps
I forgot, does odor have volume?
Answer: oder has mass
Explanation:
please help :) hope you have a good day
Answer:
the volume of the gas will decrease
How much Cao will be produced by decomposition of 50g CaCO3.
Answer:
28 g of CaO
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated:
CaCO₃ —> CaO + CO₂
Next, we shall determine the mass of CaCO₃ that decomposed and the mass of CaO produced from the balanced equation. This can be obtained as follow:
Molar mass of CaCO₃ = 40 + 12 + (16×3)
= 40 + 12 + 48
= 100 g/mol
Mass of CaCO₃ from the balanced equation = 1 × 100 = 100 g
Molar mass of CaO = 40 + 16
= 56 g/mol
Mass of CaO from the balanced equation = 1 × 56 = 56 g
SUMMARY:
From the balanced equation above,
100 g of CaCO₃ decomposed to produce 56 g of CaO.
Finally, we shall determine the mass of CaO that will be obtained by the decomposition of 50 g of CaCO₃. This can be obtained as follow:
From the balanced equation above,
100 g of CaCO₃ decomposed to produce 56 g of CaO.
Therefore, 50 g of CaCO₃ will decompose to produce = (50 × 56)/100 = 28 g of CaO.
Thus, 28 g of CaO were obtained from the reaction.
For the balanced equation shown below, what would be the limiting reagent if 42.3 grams
of N2O5 were reacted with 9.18 grams of H2O?
N2O5+H2O---> 2HNO3
A. HNO3
B. H20
C. N205
Answer: A. HNO3
Explanation:
Hail is falling down from the sky at 50 miles per hour. Is this an example of speed,
velocity or acceleration?
Explanation:
tgggghhhhijyyhhjjjjjjjj
Please help I hope you can see the question
A. The quantity of ba(OH)2 will decrease
B. H+ will combine with OH to form water
C. The base will dissociate to form more OH
D. The reaction will move to the right
E. The reaction will move to the left
Answer:
e
Explanation:
the reaction can't move to left because H is positive
Solution of an unknown concentration that has another solution slowly added to it _____________. A reagent added to the analyte solution that changes color when the reaction is complete ___________. Glassware that allows a solution to be precisely and slowly added to another solution ____________Solution of known concentration that is slowly added to a solution of unknown concentration ____________ When the required amount of one solution has been added to the second solution to complete the reaction __________ Process of slowly adding a solution to react with another solution and determine the concentration of one of the solutions based on the reaction between them _________
Answer:
Solution of an unknown concentration that has another solution slowly added to it Analyte.
A reagent added to the analyte solution that changes color when the reaction is complete Indicator .
Glassware that allows a solution to be precisely and slowly added to another solution burette.
Solution of known concentration that is slowly added to a solution of unknown concentration titrant.
When the required amount of one solution has been added to the second solution to complete the reaction end point.
Process of slowly adding a solution to react with another solution and determine the concentration of one of the solutions based on the reaction between them Titration.
After adding 20.0 mL of 5% NaOH solution into the remaining organic layer, followed by mixing and venting, the solution separated into two distinct layers. Match the following: Group of answer choices The top layer was the ______________ layer. [ Choose ] 9-fluorenone was most soluble in the ____________ layer. [ Choose ] deprotonated chloroanilic acid was most soluble in the _____________ layer. [ Choose ] The bottom layer was the __________________ layer. [ Choose ] The organic layer was a ________________ colored solution. [ Choose ] The aqueous layer turned into a _____________ colored solution. [ Choose ]
Answer:
The top layer was the organic layer.
9-fluorenone was most soluble in the organic layer.
Deprotonated chloroanilic acid was most soluble in the aqueous layer.
The bottom layer was the aqueous layer.
The organic layer was a yellow colored solution.
The aqueous layer turned into a pink colored solution.