Answer: m = 24.31 g/mol · 1.13 mol
Explanation: 2 mol HCl use 1 mol Mg.
Magnesium is used 0.5 · 2.26 mol = 1.13 mol
M(Mg) = 24.31 g/ mol
27.50 grams of magnesium were used in the reaction.
What is magnesium ?Magnesium is a chemical element with the symbol Mg and atomic number 12. It is a shiny gray metal that is relatively soft and lightweight. Magnesium is the eighth most abundant element in the Earth's crust and is found in minerals such as magnesite and dolomite.
The balanced chemical equation is: Mg + 2HCl ⟶ MgCl2 + H2. From the equation, we can see that one mole of magnesium reacts with 2 moles of hydrochloric acid to produce one mole of magnesium chloride and one mole of hydrogen gas.
We are given 2.26 moles of hydrochloric acid, which means that we need half as many moles of magnesium to react with it. So: moles of Mg = 2.26/2 = 1.13
Now we can use the molar mass of magnesium (24.31 g/mol) to calculate the mass of magnesium used in the reaction:
mass of Mg = moles of Mg x molar mass of Mg
mass of Mg = 1.13 mol x 24.31 g/mol
mass of Mg = 27.50 g
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How many moles of water are contained in 0.250 mole
of CuSO4.5H2O?
A) 1.25 B) 4.50 C) 40.0 D) 62.5
Answer:
C. 40
Explanation:
there are 40 moles of water in a 0.250 mole. use the formula to find out
40.0 = 40.0 + 0
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Need some help while I go help other people
Answer:
12×8+14×3+31×2+16×4+1
96+52+62+48+1
259grams
Answer:
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Who want a brainliest? You do? Oh ok. Technically I have to write a question, so answer these...
1 + 1 =
2 + 2 =
4 + 4 =
7 + 7 =
8 + 8 =
(Hint: none of the answers are numbers ;)
Answer:
so wat is it in?.....????
1. too
2. for
3. ate
4.for teen
5. suck`s teen
did i get it right?
Temperature measures _____________.
A. how much heat an object can produce
B. what the weather will be
C. the total energy in an object
D. the average speed of the particles in a material
Answer:
C
Explanation:
Temperature is the amount of energy an object has in it's thermal energy stores
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answer:
millions of animals..
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For reaction below, describe how its equilibrium could be shifted in the indicated direction.
1. H2(g)+C12(g)<---------->2HC1(g)+thermal energy: shift to the left
2.C(s) +O2(g)<---------->CO2+thermal energy: shift to the right
Answer:
Here is the ANSWER KEY, it may also has other of the questions you don't know :)
Explanation:
https://sciencewithhorne.weebly.com/uploads/5/7/3/5/57358947/unit_11_hw_key.pdf
4.How element gold is different from oxygen?
Answer:
Gold is a metal, more specifically a transition metal, whereas Oxygen is a nonmetal, more specifically a reactive nonmetal. Using this information, you can compare and contrast metals, nonmetals, and metalloids.
Metals are:
Shiny
High melting point
Mostly silver or gray in color
Mostly solids at room temperature – Mercury (Hg) is a liquid at room temperature
Malleable – able to be hammered into a thin sheet
Ductile – able to be drawn/pulled into a wire
Good conductors of heat and electricity
Nonmetals are:
Dull
Low melting point
Brittle – break easily
Not malleable
Not ductile
Poor conductors of heat and electricity
Metalloids are:
Found on the “zig-zag” line on the Periodic Table of Elements
Have properties of both metals and nonmetals
Can be shiny or dull
Semiconductors – able to conduct electricity under certain conditions
Explanation:
Reccomend this site for questions llike these: https://ptable.com/#Properties
What is the main function of the part labeled Yin the model?
Answer:
The part labelled Y is the chloroplast and its main function is to produce food for the plant in the reactions of photosynthesis.
Explanation:
Plants are autotrophic organisms in that they are able to manufacture their own food. Plants are able to manufacture their own food due to the presence of the cell organelle known as the chloroplast. The plant chloroplast has its own DNA and can reproduce independently, from the rest of the cell. They can as well produce amino acids and lipids required for the chloroplast membrane.
Chloroplasts are green-colored membrane-bound organelles found within the plant cell. Their green color is due to the presence of the pigment, chlorophyll. Chlorophyll in the chloroplasts are responsible for absorbing light energy from sunlight and using this absorbed energy to make simple sugars (carbohydrates) from carbon (iv) oxide and water. This is the main function of the chloroplasts in plant cells.
Photosynthesis occurs in the chloroplasts in two reaction steps:
1. The light reaction - involves the splitting of e=water molecules using the energy of sunlight
2. The dark reactions - carbon (iv) oxide from the air is used to produce sugars.
Why is it important to know characteristics that matter undergoes in chemistry? How can we analyze the relationships between chemical and physical changes and properties?
Extension Questions: What is the study of Chemistry? Who are some of the important people who have contributed to the field? How do regular Americans interact with Chemistry around them?
How can we understand the historical development of the Periodic Table and apply its predictive power?
Extension Questions: Describe different chemical principles and systems. How does the layout of the periodic table allow you predict other element's properties? Consider all types and groups of elements.
Why is it important to know and understand the historical development of atomic theory?
Extension Questions: How does the atom relate to the elements of the periodic table? What are your most common models and how do they relate to the current atomic model? What theories don’t hold true today if any?
How do atoms combine to form ionic, covalent, and metallic bonds?
How can we write and balance chemical equations using the law of conservation of mass?
Answer:
Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything.
See photo! Calculating mass and percentage yields.
Answer:
see above
Explanation:
check for cfe's
How many moles of AgNO3 must react to form 0.854 mol Ag?
mol AgNO3
Answer:
0.854
Explanation:
The equation of its dissolution in water is: AgNO3 → Ag + (aq) + NO3- (aq)
and AgNO3 → Ag + (aq) + NO3- (aq)
1 mol 1mol 1mol
? -------- 0.854mo
so for finding the value, it is sufficients to complute 1 x 0.854 mol =0.854 mol
so, 0.854 mol is required for the reaction to form 0.854 mol of Ag
Why would the same amount of gas be produced even if we increase the amount of baking soda?
Answer:
Explanation:
If you are not increasing the amount of vinegar, the adding more baking soda has nothing to react with. The limiting reagent is vinegar (or some other acid).
The usual reaction is
HC2H3O2 + NaHCO3 ===> NaC2H3O2 + HOH + CO2 which is the gas being expelled.
If you increase the NaHCO3 nothing more will happen until you increase the vinegar.
Joy mixes one cup of sugar and one cup of lemon juice into three cups of water. The solvent in this recipe is the?
Answer: Water is the solvent in this recipe.
Explanation: A solvent is " a molecule that has the ability to dissolve other molecules". Lemon juice and sugar are solutes.
(2 pts) In the picture above, which of the following is the best evidence that a chemical reaction has occurred?
A. The mass is 2402.0 g
B. The phenol red is a yellow color
C. Bubbles are formed in the inverted tube
D. There is no evidence of a reaction
What does a hygrometer measure?
Answer:
humidityExplanation:
Hygrometer, instrument used in meteorological science to measure the humidity, or amount of water vapour in the air. Several major types of hygrometers are used to measure humidity.
How Do OBJECTS BEGIN MOVING?
When a outside force acts upon it.
how do i make chrystals using home suppplies
You could use sodium accetate a put it in water...
how are fossils fuels differ than fossils
Answer:
fossils are like bones of dinosaurs and other animals. fossil fuels are non renewable sources like natural gas, coal, and nuclear energy. (there is more than those)
Explanation:
In an ionic bond, which
category of elements are giving away
electrons?
Ionic bonds form only between metals and nonmetals. That's because metals “want” to give up electrons, and nonmetals “want” to gain electrons. It takes energy to remove valence electrons from an atom and form a positive ion
Answer:
Ionic bonds form only between metals and nonmetals. That's because metals “want” to give up electrons, and nonmetals “want” to gain electrons. It takes energy to remove valence electrons from an atom and form a positive ion. Energy is released when an atom gains valence electrons and forms a negative ion.
hope it is helpful u in understandingplz mrk it as brainliest.list 2 ways mechanical energy can be transformed into non-mechanical energy ?
Answer:
One is the classic example of friction. When two surfaces rub together, they generate thermal energy, or heat. This is a transformation of the mechanical kinetic energy of the objects into the thermal non-mechanical energy (which is small-scale kinetic energy).
Mechanical energy can be used to overcome friction or lost in form of heat in machine parts. Friction and heat are two non-mechanical energy.
Transformation of mechanical energy into non mechanical energy
Based on the principle of conservation of energy, energy can neither be created nor destroyed but can be transformed from one form to another.
Two ways mechanical energy can be transformedThe two ways mechanical energy can be transformed include the following;
FrictionHeatMechanical energy can be used to overcome friction or lost in form of heat in machine parts, in this process, the mechanical energy (kinetic energy) would be converted into other forms of energy such as heat.
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True or False; the atomic number always equals the number of protons, neutrons and electrons found in an atom.
"" ANSWER""
Protons are values of atomic numbers that do NOT change, that is, they are located inside the nucleus of the atom, whereas electrons are located in the electrosphere that can gain or lose electrons, the electron has a negative charge and the Proton positive, that is, if in any atom it wins an electron the atom will be negative and if the atom loses it will be positive because we already know that the number of protons does not change. To calculate the number of neutron we have to make the number of rounded atomic mass which becomes mass less the number of protons for example oxygen gas has 8 protons which is the atomic number and has atomic mass 15,999 which rounding up to 16 to find the number of neutrals we do 16-8 = 8 so now we know that oxygen has: 8 protons, 8 electrons and 8 neutrons but the values will not always be the same but the possibility of protons and neutrals having the same value is 75% by my count .
● ○ ● RULES ○ ● ○ ●
Atomic number = number of protons
Atomic mass ROUNDNESS = mass
Number of neutrons = number of protons - mass number
OBSERVATION- EXPLANATION FOR STUDENTS OF 9 YEARS BECAUSE IN THE HIGH SCHOOL UP SOME CHANGES CHANGE.
■■ GOOD STUDIES ■■
Which is larger, 6 miles or 30,000 feet?
plsssssssssssss answer
Answer:
I think 6 miles
Explanation:
6 miles is larger than 30,000 feet.
To compare the sizes of 6 miles and 30,000 feet, we need to convert one of the measurements to the same unit as the other. Since both miles and feet are units of length, we can convert one to the other.
1 mile is equal to 5,280 feet. Therefore, to convert 6 miles to feet, we multiply by the conversion factor:
6 miles × 5,280 feet/mile = 31,680 feet
Now we can compare 31,680 feet to 30,000 feet. Since 31,680 feet is larger than 30,000 feet.
Hence, we can conclude that 6 miles is larger than 30,000 feet.
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what is an epicenter of an earthquake
Answer:
It's the epicenter of an earthquake!
p.s. basically that means it's the center
Answer:
the epicentre of an earthquake is the location directly above the hypocenter the surface of the earth (p.s the hypocenter is the location where an earth quake starts )
what is a metal that forms two types of oxides and rusts in moisture
Answer:
An example of a metal that rusts is Iron
Answer:
Iron
Explanation:
The metal that forms 2 types in moisture is iron.
Burning of aluminium powder in excess oxygen produces white aluminium oxide powder.Balance chemical equation.
Explain to me tq(*σ´∀`)σ
Describe the relationship between the potential difference across the resistor and
the current through the resistor.
Ohm's Law states that for a linear circuit the current flowing through it is proportional to the potential difference across it so the greater the potential difference across any two points the bigger will be the current flowing through it.
(I'm happy)
A bulb is added to a circuit. When you place your hand near the bulb, it feels warm. The bulb in the circuit would most accurately identified as a..
A) conductor
B) load
C) energy source
D) insulator
Answer:
C energy source
Explanation:
I got this right
Answer:
c
Explanation:
1. Calculate the mass of alumina (A1203) produced when 250 g of aluminum burns in oxygen.
Answer:
4Al + 3O2 ------> 2Al2O3
the mole ratio is 4:2
you divide 250 by 2
you get 125 and that's the mass produced
En una planta de energía, se produce CO2 gracias a la reacción de combustión del material orgánico con oxígeno para producir CO2, SO2, SO3, NO, NO2 y H2O que son los causantes del efecto invernadero, el SO2 reacciona con H2O para formar H2SO3, causante de la lluvia ácida. En condiciones de gas ideal el SO2 se encuentra a una temperatura de 100°C y 0,5 atm de presión, el volumen ocupado generalmente es de 25 L. 5. La ecuación para hallar el número de moles debe ser: a. Gases ideales: relación entre todas las variables que influyen sobre los gases b. Boyle: relación entre volumen y presión c. Charles: relación entre el volumen y la temperatura d. Gay Lussac: relación entre la presión y la temperatura
Answer:
a. Gases ideales: relación entre todas las variables que influyen sobre los gases
Explanation:
La ecuación del gas ideal da la relación entre las variables; presión, volumen, temperatura y número de moles.
Según la ecuación del gas ideal; PV = nRT
P = presión del gas
V = volumen del gas
n = Número de moles del gas
R = constante de gas
T = temperatura del gas
El número de moles de SO2 se obtiene de;
n = PV / RT
n = 0,5 * 25 / 0,082 * 373
n = 12,5 / 30,586
n = 0,41 moles
Crossing a Dd parent with another Dd parent results in