How many moles of O are there in 41.8 grams of O?
Answer:
[tex]\boxed {\boxed {\sf 2.61 \ mol \ O}}[/tex]
Explanation:
To convert from grams to moles, the molar mass is used. This number tells us the grams per mole of a substance. It can be found on the Periodic Table. Look for oxygen.
Oxygen (O): 15.999 g/molUse this number as a ratio.
[tex]\frac {15.999 \ g \ O }{ 1 \ mol \ O }[/tex]
Multiply by the given number of moles.
[tex]41.8 \ g \ O *\frac {15.999 \ g \ O }{ 1 \ mol \ O }[/tex]
Flip the fraction so the grams of oxygen cancel.
[tex]41.8 \ g \ O *\frac { 1 \ mol \ O }{ 15.999 \ g \ O}[/tex]
[tex]41.8 *\frac { 1 \ mol \ O }{ 15.999 }[/tex]
[tex]\frac { 41.8 \ mol \ O }{ 15.999 }= 2.61266329146 \ mol \ O[/tex]
The original measurement of grams has 3 significant figures (4, 1, and 8). Our answer must have the same. For the number we calculated, that is the hundredth place. The 2 in the thousandth place tells us to leave the 1.
[tex]2.61 \ mol \ O[/tex]
41.8 grams of O has 2.61 moles of oxygen.
the cl-cl bond will react more readily, because it has a
The Cl-Cl bond will react more readily because it has a lower bond energy than the C- H bond.
What is bond energy?The bond energy refers to the energy required to break the bonds that links two atoms together in a molecule. It is equal to the energy that is evolved when the bond is formed.
In comparing the Cl-Cl bond with the C-H bond, we will find out that the Cl-Cl bond will react more readily because it has a lower bond energy than the C- H bond.
Learn more about bond energy: https://brainly.com/question/26141360
19 What is the "skin" of the cell?
Answer:
d cell membrane:)
Explanation:
Please can someone explain the differences in variables (e.g. control variable, Independent variable and Dependent variable). I know the definition, but I'm still not sure which is which when undertaking an experiment. Could someone possibly give me an example of an experiment and which is which?
Answer:
Independent Variable: The thing in an experiment which is changed.
Dependent Variable: The thing in an experiment which is affected by the change. (In other words, it's affected by the independent variable.)
Control Variable: The other factors of the experiment that remain unchanged.
For example, say you want to do an experiment about the effects of water on plant height. So, the independent variable, or the thing that is changed would be the amount of water, and the dependent variable would be the plant height, as the plant height is directly affected by the independent variable. Lastly, for this to be a fair experiment, there must be control variables. For example, all of the plants should be put in a room with equal temperature, they should get the same amount of sunlight, etc.
I hope this answers your question- feel free to ask me if you need any more help.
Answer with Explanation:
Lol.. even i was confused before .. so i learnt now ill help u :
Simple!
See... lets take simple expirament to explain:
My expirament is to verify if sunlight affects the growth of plants ...
So here :
My controlled variable : It is what is held constant.. So ur supposed to NOT it like everything else expect sunlight..(ex: water, soil, type of plant etc)
My Independent variable : Variable that is changed.... So this is wht u ARE changing to make th expirament ... (for ex: here sunlight u will chanhe... u will put on in a dark room and a nother in the light..)
My dependetn variabe:l Some thing that changes on is own..cause of the expiramen t... like the result ..(for ex: height , growth of plant etc)
I hope u understood !! :))
gold has a density of 19.32 g/cm3 if you cut a piece of gold in half how much will the density of each piece be?
Answer:
19.32 g/cm³
Explanation:
The density will remain the same no matter how many times you cut the gold. The density is g/cm³ or g/mL. Density is essentially how many grams 1 mL of a compound weighs.
Answer:
[tex]\boxed {\boxed {\sf 19.32 \ g/cm^3}}[/tex]
Explanation:
Density is the mass per volume (g/mL or g/cm³). It is an intrinsic property. This means it is not dependent on the amount and all samples of the same substance have the same density.
Therefore, if a piece of gold has a density of 19.32 grams per cubic centimeter and it is cut in half, the two pieces will have the same density.
How do you write an Assignment / Present it in a professional way I just need a few pointers that's all any suggestions would help !
Answer: use big words
Explanation:
*
The prevailing weather patterns of a region
Answer:
noun. the composite or generally prevailing weather conditions of a region, as temperature, air pressure, humidity, precipitation, sunshine, cloudiness, and winds, throughout the year, averaged over a series of years. a region or area characterized by a given climate: to move to a warm climate.
Explanation:
1) If you have 2.6 moles of iron (III) oxide, how many molecules of iron (III)
oxide do you have?
Answer:
234
Explanation:
so 3 x 3 x 26 =234
Classify the following as a chemical or
physical property:
Aluminum is a shiny, silver color.
chemical
physical
Answer:
physical
Explanation:
How many moles of PbCl2 are produced
if 14 moles of AlCl3 are consumed?
3Pb(NO3)2 + 2AlCl3 + 3PbCl2 + 2A1(NO3)3
Answer:21 moles of PbCl2 formed
Explanation: 3Pb(NO3)2(aq) + 2AlCl3(aq) --> 3PbCl2(s) + 2Al(NO3)3(aq)
14 moles AlCl3 x 3 moles PbCl2/2 moles AlCl3 =21 moles of PbCl2 formed
The number of moles of PbCl₂ produced when 14 moles of AlCl₃ are consumed in the reaction is 21 moles
Balanced equation3Pb(NO₃)₂ + 2AlCl₃ —> 3PbCl₂ + 2Al(NO₃)₃
From the balanced equation above,
2 moles of AlCl₃ reacted to produce 3 moles of PbCl₂.
How to determine the mole of PbCl₂ producedFrom the balanced equation above,
2 moles of AlCl₃ reacted to produce 3 moles of PbCl₂.
Therefore,
14 moles of AlCl₃ will react to produce = (14 × 3) / 2 = 21 moles of PbCl₂.
Thus, 21 moles of PbCl₂ were obtained from the reaction.
Learn more about stoichiometry:
https://brainly.com/question/14735801
How many moles are in 120.g of ar?
Answer:
3 moles of Argon
Explanation:
The molar mass for argon is 39.948 g/mol
[tex]\frac{120g}{39.948g/mol} = 3.004molesAr[/tex]
1)Where are irons in our body ?
2) Is there some difference in the way metals and non– metals react with acid ?
Answer:
iron is found in the red blood cells of your blood called hemoglobin and in muscle cells called myoglobin. Hemoglobin is essential for transferring oxygen in your blood from the lungs to the tissues.
2( non- metals generally do not react with acids but metals react with acids and produce hydrogen gas that burns with a 'pop' sound. You must have noticed that copper does not react with dilute hydrochloric acid even on heating but it reacts with sulphuric
Predict the products
Answer:
1. No reaction.
2. ZnCl₂ + H₂
3. CaCl₂ + H₂
Explanation:
1. Cu + HCl —> ___
From the reactivity series of metals, H is higher that Cu in the series and so, Cu can not displace H from solution.
Therefore, no reaction will occur.
2. Zn + HCl —> ___
Zn is higher than H in the activity series so, it will displace H from acid solution to produce hydrogen gas, H₂.
The balanced equation is given below:
Zn + 2HCl —> ZnCl₂ + H₂
3. Ca + HCl —> ___
Ca is higher than H in the activity series so, it will displace H from acid solution to produce hydrogen gas, H₂.
The balanced equation is given below:
Ca + 2HCl —> CaCl₂ + H₂
please answer as soon as possible if you can
Answer:
Second one
Explanation:
Predict the products:
Ni + KCl →
o Nickel chloride and potassium forms
o Hydrochloric acid forms.
o Potassium Nickel Chloride forms.
o No reaction occurs.
Explanation:
Ni + 2KCl → 2K + Nicl2
It form
potassium and nickel chloride.
What are the 4 limiting factors
It’s in the image~
Answer:
I'm pretty sure you have it correct
what is the equivalent weight of sodium trioxocarbonate (IV) in the reaction between Hydrochloric acid and sodium trioxocarbonate (IV)?
Correct answer gets brainliest. This is urgent.
Answer:
Standard acid-base reaction in two stages:
Na2CO3 + HCl → NaHCO3 +NaCl
NaHCO3 + HCl → NaCl + CO2 + H2O
If only a small quantity of acid is added (and the overall solution remains above pH 7), the reaction would stop at stage 1 and you’d be left with an aqueous solution of sodium chloride and sodium bicarbonate. Adding more acid would lead to the bicarbonate being converted to carbon dioxide and water, with the CO2 coming out of solution as a gas and more sodium chloride being produced.
Identify the mystery metal using the formula for density (Density = Mass/Volume). The object has
a mass of 95 g and a volume of 4.9 cm3.
O Silver 10.5 g/cm3
O Mercury 13.5 g/cm3
O Gold 19.3 g/cm3
O Copper 9.0 g/cm3
Around what pH are most of the substances in your body? Why?
Answer:
The pH scale measures how acidic or alkaline — basic — something is. Your body works constantly to carefully control pH levels of blood and other fluids. The body's pH balance is also called the acid-base or acid-alkaline balance. The right pH levels are needed for good health.
Help which one will it be
Answer:
D
Explanation:
Answer:
the answer is D I did that one in 5th grade
Gopher tortoises live on dry land. They live in large holes that they dig in the soil. Which statement gives the best explanation of how this behavior aids in soil formation?
A. It hardens the soil, allowing less water to reach the rocks underground.
B. It causes weathering of the rocks, as the tortoise breaks the rocks into smaller pieces.
C. It causes weathering of the rocks, as the tortoise breaks the rocks into smaller pieces.
D. It loosens and mixes the soil, increasing air in the soil and the ability to drain water.
Answer:
It moves rocks above ground, where they are exposed to more water and wind.
How many grams of silver chromate are produced when 250. mL of 1.500 M Na2CrO4 are added to excess silver nitrate? Please balance the equation before solving the problem.
AgNO3(aq)+Na2CrO4(aq) --> Ag2CrO4(s)+NaNO3(aq)
30 points here!:)
Write the balanced chemical equation
Calculate the moles of
Na2CrO4
Use the molar ratio from the balanced equation to calculate the moles of
Ag2CrO4
Calculate the mass of
Ag2CrO4
mass of Ag2CrO4 produced is 124 g.
The mass of silver chromate are produced when 250. mL of 1.500 M Na₂CrO₄ are added to excess silver nitrate is 62.028g.
How do we calculate mass from moles?Mass of any susbtance will be calculated by using moles as:
n = W/M, where
W = given mass
M = molar mass
Relation between moles and molarity as:
M = n/V, where
M = molarity
V = volume
Moles of Na₂CrO₄ = (1.5)(0.25) = 0.375 mol
Given balanced chemical reaction is:
2AgNO₃(aq) + Na₂CrO₄(aq) → Ag₂CrO₄(s) + 2NaNO₃(aq)
From the stoichiometry of the reaction it is clear that,
2 moles of Na₂CrO₄ = produces 1 mole of Ag₂CrO₄
0.375 moles of Na₂CrO₄ = produces 1/2×0.375=0.187 mole of Ag₂CrO₄
Mass of 0.187 moles of Ag₂CrO₄ = (0.187mol)(331.7g/mol) = 62.028g
Hence required mass of Ag₂CrO₄ is 62.028g.
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Fill in the coefficients that will balance the following reaction: (Note: Use 1 as coefficient where appropriate.) Hg(C)3)2 + AgCl -> HgCl4 +Ag2CO3
i just answered this question and it was actually 1,4,1,2
I’ll really appreciate it if you help me out on this one .
Answer:
i'd say D
Explanation:
the dependent variable is the change that happens
What is the answer
A. North
b. South
C.east
D west
how many atoms are in 0.25 moles of nitrogen
Answer:
0.25 mole of NO2 contains 0.25 mole 'N'
one mole contains 6.023 x 10 ^23 atoms
0.25 mole II------------------------------>?
= 0.25 x 6.023 x10^23 = 1.5 x 10^23 atoms
Explanation:
What mass of oxygen is required to react completely with the burning of 25.0 g of hexane?
Answer:
88.2
Explanation:
I need help, decreases or increases
Answer:
increase
Explanation:
At what temperature would the volume of a gas be equal to 45.7 L, if the volume of that gas was 33.9 L at 12.4ºC? 241.9 K 241.9 K 451.2 K 451.2 K 384.7 K 384.7 K 273.15 K
Answer:
The temperature will be 384.7 K
Explanation:
Charles's Law consists of the relationship that exists between the volume and the temperature of a certain quantity of ideal gas, which is maintained at a constant pressure, by means of a constant of proportionality that is applied directly. For a given sum of gas at a constant pressure, as the temperature increases, the volume of the gas increases and as the temperature decreases, the volume of the gas decreases because the temperature is directly related to the energy of the movement of the gas molecules. .
In summary, Charles's law is a law that says that when the amount of gas and pressure are kept constant, the quotient that exists between the volume and the temperature will always have the same value:
[tex]\frac{V}{T} =k[/tex]
Having an initial state 1 and a final state 2, the following is true:
[tex]\frac{V1}{T1} =\frac{V2}{T2}[/tex]
In this case:
V1= 33.9 LT1= 12.4 C= 285.4 K (being 0 C= 273 K)V2= 45.7 LT2= ?Replacing:
[tex]\frac{33.9 L}{285.4 K} =\frac{45.7 L}{T2}[/tex]
Solving:
[tex]T2=45.7 L*\frac{285.4 K}{33.9 L}[/tex]
T2= 384.7 K
The temperature will be 384.7 K
what are 5 functions of proteins