Explanation:
64 grams of O_2O2 will be required to react completely with 4 moles of Mg.
As per the balanced chemical equation 2 moles or 48 g of Mg reacts with one mole or 32 g of oxygen. Hence, 4 moles of Mg requires 2 moles or 64 grams of oxygen gas.
What is magnesium oxide ?Magnesium oxide (MgO) is a white solid mineral that occurs naturally as the mineral periclase. It is one of the most common and important magnesium compounds, and is widely used in many industrial and commercial applications.
The balanced chemical equation of the reaction between Mg and oxygen is given as follows:
2 Mg + O₂ ⇒ 2 MgO
As per the balanced chemical equation 2 moles or 48 g of Mg reacts with one mole or 32 g of oxygen. Hence, 4 moles of Mg requires 2 moles or 64 grams of oxygen gas.
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Explain the process that creates chemical elements lighter than iron, including evidence.
Answer:
. The authorities have closed the casino.(change in passive)
1 Which climate zone has hot summers, cold winters, and average amounts of precipitation throughout the year? (2 points)
a
Equator
b
Polar
c
Temperate
d
Tropical
Answer:
C
Explanation:
i took the test
The temperate climatic zone has hot summers, cold winters, and average amounts of precipitation throughout the year. Thus, option C is correct.
What is a Climatic zone?The climatic zone may be defined as a world area or part discerned from a neighbor by a significant physical climatic attribute that is of a transnational scale.
The movement of the sun from the tropic of cancer to the tropic of Capricorn determines the climate of a particular zone. The equator zone is more consistent with climatic attributes. The tropical zone has seasonal climatic attributes.
Therefore, the correct option is C.
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What is the empirical formula of these molecules? Down below. Show your work.
censures hydrogen Oxygen
Answer:
v
Why glucose and fructose produce same shaped products with phenylhydrazine?
During the reaction of glucose and fructose with excess phenylhydrazine to form osazone, only the C-1andC-2 atoms of glucose and fructose participate in the reaction. The rest of the molecule remains intact. Hence, glucose and fructose produce the same osazone.
HNO3 ions in an aqueous solution. A forms or B. does not form
Answer:
A. forms, I used his answer and it was wrong so forms is the answer...
1.) Given the % composition of each element in the following compound. Calculate and determine the empirical formula. Name the formula as well.
1.6% H 22.2% N 76.2% O.
Hint, assume a 100 g sample, then you will have 1.6 g H, 22.2 g N and 76.2 g O
2. A sample of a compound is broken down into its constituent elements and yields 13.0 g of lead, 1.77 g of nitrogen and 4.03 g of oxygen. What is the empirical formula for this compound?
3.) If 4.04g of N combine with 11.46g O to produce a compound with a molar mass of 108.0 g/mol, what is the molecular formula of this compound?
1. The empirical formula of the compound is HNO₃. The name of the compound is trioxonitrate (v)
2. The empirical formula of the compound is PbN₂O₄ or Pb(NO₂)₂
3. The molecular formula of the compound is N₂O₅
1. How to determine the empirical formula Hydrogen (H) = 1.6 gNitrogen (N) = 22.2 gOxygen (O) = 76.2 gEmpirical formula =?Divide by their molar mass
H = 1.6 / 1 = 1.6
N = 22.2 / 14 = 1.586
O = 76.2 / 16 = 4.7625
Divide by the smallest
H = 1.6 / 1.586 = 1
N = 1.586 / 1.586 = 1
O = 4.7625 / 1.586 = 3
Thus, the empirical formula of the compound is HNO₃ and the name of the compound is trioxonitrate (v)
2. How to determine the empirical formula Lead (Pb) = 13 gNitrogen (N) = 1.77 gOxygen (O) = 4.03 gEmpirical formula =?Divide by their molar mass
Pb =13 / 207 = 0.0628
N = 1.77 / 14 = 0.1264
O = 4.03 / 16 = 0.2519
Divide by the smallest
Pb = 0.0628 / 0.0628 = 1
N = 0.1264 / 0.0628 = 2
O = 0.2519 / 0.0628 = 4
Thus, the empirical formula of the compound is PbN₂O₄ or Pb(NO₂)₂
3. How to determine the molecular formulaWe'll begin by determining the empirical formula of the compound. This can be obtained as follow:
Nitrogen (N) = 4.04 gOxygen (O) = 11.46 gEmpirical formula =?Divide by their molar mass
N = 4.04 / 14 = 0.2886
O = 11.46 / 16 = 0.71625
Divide by the smallest
N = 0.2886 / 0.2886 = 1
O = 0.71625 / 0.2886 = 2.5
Multiply by 2 to express in whole number
N = 1 × 2 = 2
O = 2.5 × 2 = 5
Thus, the empirical formula of the compound is N₂O₅
Finally, we shall determine the molecular formula of the compound. This can be obtained as follow:
Empirical formula = N₂O₅Molar mass of compound = 108 g/mol Molecular formula =?Molecular formula = empirical × n = molar mass
[N₂O₅]n = 108
[(2×14) + (16×5]n = 108
[28 + 80]n = 108
108n = 108
Divide both side by 108
n = 108 / 108
n = 1
Molecular formula = [N₂O₅]n
Molecular formula = [N₂O₅] × 1
Molecular formula = N₂O₅
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Find the number of molecules and number of each type of atom of 0. 04 moles of H2C2O4
answer
Explanation: i think 0.49
Heavy rain and runoff can
A cause erosion
B cause flooding
C fill reservoirs
D all of the above
How many moles are in 3.5 of “K”?
Explanation: i don't know how can i know the moles in element?
Consider the reaction below. 2c6h14 19o2 right arrow. 12co2 14h2o how many moles of hexane (c6h14) must burn to form 18.4 mol of carbon dioxide? 1.53 mol 3.07 mol 110. mol 175. mol
3.07 moles of hexane must burn to form 18.4 moles of carbon dioxide.
What is moles?Moles of any substance is define as the ratio of the given mass to the molar mass of that substance.
Given chemical reaction is:
2C₆H₁₄ + 19O₂ → 12CO₂ + 14H₂O
From the stoichiometry of the reaction, it is clear that:
2 moles of C₆H₁₄ = produce 12 moles of CO₂
1 moles of CO₂ produced by = 2/12 moles of C₆H₁₄
18.4 moles of CO₂ produced by = 1/6×18.4=3.07 moles of C₆H₁₄
Hence, option (2) is correct i.e. 3.07 moles.
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What causes water droplets to form on the outside of a glass?
Answer:
under me :)
Explanation:
There is water vapour present around us. When you put cold glass on a table, the water vapour comes in contact with the glass, and condenses, forming water droplets which are seen around the glass. Hope this helps
3. If a sample of gas occupies 6.80 L at 325oC, what will its volume be at 25oC if the pressure doesn't change
Answer:
V2 = 3.39
Explanation:
V1/T1 = V2/T2
V1 = 6.80L
T1 = 325C (must be convert to K by + 273.15) = 598.15 K
T2 = 25C = 298.15 K
V2 =?
T2xV1/T1 = V2
298.15 x 6.80/ 598.15 = V2
3.39 = V2
So 3.39 is the answer!
What is the enthalpy of reaction for the decomposition of NO2(g)? 2NO2(g) Right arrow. N2(g) 2O2(g) kJ This reaction is.
Answer:
The reaction is: -67.68
Explanation:
hope this helped:)
You have 40 g of NaCl in 530 g of water.
What is the freezing point?
Answer:
801 •C
Explanation:
Hope this helps! :)
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HNO3(aq)+H,0(1)+2NO(g) what is the total number of nitrogen atoms?
Answer:
3n+2n=5n 5 nitrogen atoms
What is the difference between a nuclear and thermonuclear bomb.
Explanation:
the difference between a nuclear bomb and a thermonuclear bomb is that :
A nuclear bomb derives it's destructive force from nuclear reaction. That is,fission reaction, fusion reaction or both.
While thermonuclear bomb derives it's own force from a chain reaction in which isotopes of hydrogen combines under extremely high temperature to form helium under a process known as nuclear fusion.
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Why my arms feel cool when alcohol evaporates from my skin?
Answer:
Alcohol evaporates much faster than water due to its lower boiling temperature. This allows more heat to be transferred faster, which makes it feel colder to the touch.
Explanation:
I need help finding real life images of both prophase and interphase. I end up mixing them together
Answer:
the first picture is of prophase and the second one is interphase
Explanation:
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The type of intermolecular force present in I2, Br2, and Cl2 is:
a. london dispersion
b. dipole dipole
c. hydrogen bond
d. metallic
explain why
Answer:
d metallic is the sum of the following is not a primary function of the following method
According to the Law of Conservation of Matter _______.
a. No atoms are created or destroyed whenever matter undergoes a physical change but can when matter undergoes a chemical change.
b. Atoms are created but not destroyed whenever matter undergoes a physical or chemical change.
c. Atoms are destroyed but not created whenever matter undergoes a physical or chemical change Some atoms are created or destroyed whenever matter undergoes a physical or chemical change.
d. No atoms are created or destroyed whenever matter undergoes a physical or chemical change.
Answer:
A.
Explanation:
Matter is neither created nor destroyed unless it is acted upon by a chemical force/change.
help please:)
how do the red blood cell's shape and size support its function
Answer:
The size of a red blood cell allows for more room to have more cells, The shape of a red blood cell allow it to trap and absorb oxygen
Explanation:
Red blood cells are very small, The shape of a red blood cell isn't just a sphere
A helium filled balloon has a pressure of 101 kPa and a temperature of 23 C. It is placed in a freezer where the temperature is 0 C. If the volume of the balloon remains constant, what is the new pressure of gas in the balloon?
Answer:
P2 = 0.91 atm
Explanation:
Using Gay-Lussac's Law for this question: P1/T1 = P2/T2
P1 = 101 kPa (dividing by 101.3 to convert to atm) = 0.99 atm
T1 = 23C (must be convert to Kelvin by plus 273.15) = 296.15K
T2 = 0C = 273.15K
P2 = ?
P1/T1 = P2/T2
(Multiply both sides by T2 to get rid of it).
273.15 x 0.99/296.15 = P2
P2 = 0.91 atm
Name the different groups of metals. Name an element with each group.
Answer:
alkali metals, alkaline earth metals, transition metals, basic metals, lanthanides (rare earth elements), and actinides.
Explanation:
PLS HELP GUYS WILL GIVE BRAINLIEST !!!!! How many moles are in 40.2 g Cu?
mol Cu
How many moles are in 14.1 g S?
mol S
Answer:0.633 0.440
Explanation:
edge
There are 0.6326 mole in Cu atom and 0.4397 mole in S atom.
What is mole?A mole would be defined as the quantity of a material that includes precisely 6.02214076 X [tex]10^{23}[/tex] of the substance's elementary entities.
Calculation of mole of Cu
Given data:
Mass of Cu = 40.2 g
Molar mass of Cu = 63.546 u
Mole?
Mole can be determined by the formula:
Mole = mass / molar mass
Mole = 40.2 g / 63.546 u
Mole = 0.6326
Calculation of mole of S.
Given data:
Mass of S = 14.1 g
Molar mass of S = 32.065u
Mole = ?
Mole can be determined by the formula:
Mole = mass / molar mass
Mole = 14.1 g / 32.065u
Mole = 0.4397
Therefore, there are 0.6326 mole in Cu atom and 0.4397 mole in S atom.
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Describe how the mol- ecule whose formula is NO is different from the molecule whose formula is N 2 O.
Answer:
No, it's a molecule that contains one nitrogen atom and one oxygen atom. This is in contrast to N 2 O, which consists of two nitrogen atoms and one oxygen atom.
The two reactions illustrated in the diagrams below often occur when a foreign substance enters the body.
Foreign substance
Specific proteins
©
Y
produces
Cell A
Cell B
4. The specific proteins produced by cell B, would most likely be:
1. Antigens
2. Antibodies
2. Allergens
3. Amino Acids
The specific proteins produced by cell B in response to the foreign substance are antibodies.
What are antibodies?Antibodies are specific proteins produced by the immune cells of the body in response to a foreign substance called antigen which produces the immune response.
Antibodies are released by immune cells such as B cells.
The antibodies bind to antigen and tag them for destruction by phagocytes.
Therefore, cell B will produce antibodies.
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Two white powders are mixed in a flask the bottom of the flask feels cooler this is an example of what kind of reaction?
A weather map of Chicago with a high pressure system and warm front. Based on the weather map, what might the upcoming weather be like in Chicago? Warm, dry, clear skies Warm, humid, possible thunderstorms Cold, dry, clear skies Cool, humid, possible thunderstorms.
A weather map of Chicago with a high pressure system and warm front, so the upcoming weather be Warm, dry, clear skies in Chicago.
What is high pressure of air?High pressure of air tries to compress the gas from upper atmosphere to lower atmosphere.
When any gas has high pressure then it sinks towards the land from the upper atmosphere, and at the upper part air gets cool and form water vapor. When air comes towards the land then, it becomes warm and dry as it doesn't participate in the formation of precipitate. Due to which we are able to see clear sky at the dry days.
Hence, option (1) is correct i.e. Warm, dry, clear skies are the upcoming weather.
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Answer:
A. Warm, dry, clear skies
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How do you test for carbon dioxide ?? Explain
Answer:
Carbon dioxide reacts with calcium hydroxide solution to produce a white precipitate of calcium carbonate
Explanation:
. Limewater is a solution of calcium hydroxide. If carbon dioxide is bubbled through limewater, the limewater turns milky or cloudy white
Why is it important to balance the redox equation for the electrolysis of water?.
Electrolysis is a process, which allows us to break down a chemical compound into its elements, completing the balance by adjusting the number of atoms on both sides of the reaction is important because the number of electrons given up during oxidation must be the same as the number of electrons gained during the reduction.
What is electrolysis of water?It is a process of oxidation and reduction of one or more elements that, through the induction of electric current, breaks down the water molecule (H2O), thus producing gaseous hydrogen and oxygen.
Oxidation and reduction processes occur simultaneously and never in isolation, which is why they are called redox reactions.
Therefore, we can conclude that electrolysis is a process where electrical energy will change to chemical energy where it is important that the number of electrons given up during oxidation is the same as the number of electrons gained during reduction.
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