Knowing that the system will attin a state of thermal equilibrium, the final temperature of the system is 19.24°C.
What is Thermochemistry?The term thermochemistry has to do with the heat evolved or absorbed in a chemical reaction.
Now we know that the heat gained by the pool is equal to the heat lost by the stew. Hence;
34.6 * 4.20 * ( 81.70 - T) = 4,825.6 * 4.30 * (T - 19.24)
11873 - 145.3T = 2075008T - 39923153.92
11873 + 39923153.9 = 2075008T + 145.3T
39935026.92 = 2075153.3T
T = 39935026.92/2075153.3
T = 19.24°C
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The measurement 0.41006 gram, rounded to four significant figures, is expressed as... 1) 0.4100 g
2) 0.410 g
3) 0.41 g
4) 0.4101 g
Answer:
option B = 0.410 g
Explanation:
hope this helps have hope i get brainliest
Balance the following equation.
( ? )NaCl + ( ? ) AgNO3 → ( ? ) AgCl + ( ? ) NaNO3
Balanced equation:
NaCl + ( 1 ) AgNO₃ → ( 1 ) AgCl + ( 1 ) NaNO₃
(aq) (aq) (s) (aq)
Both the sides are already balanced
Metallic bonds are formed from the sharing of valence electrons.
O A. True
OB. False
SUBMIT
Answer:
A. True
Explanation:
A metallic bond is a type of chemical bond formed between positively charged atoms in which the free electrons are shared among a lattice of cations. In contrast, covalent and ionic bonds form between two discrete atoms. Metallic bonding is the main type of chemical bond that forms between metal atoms.
How many particles are there in 3 moles of Ag?
Answer:
6.022×1023 individual items of that something. You have 3 moles, so there are 3×6.022×1023 oxygen molecules
Explanation:
6.022×1023 individual items of that something. You have 3 moles, so there are 3×6.022×1023 oxygen molecules
11. As early as 1938. the use of NaOH was suggested as a means of removing CO2 from the cabin of a spacecraft according to the following (unbalanced) reaction: NaOH +CO2-
Na2CO3 + H2O.
a. If the average human body discharges 925,0 g CO, per day, how many moles of NaOH are
needed each day for each person in the spacecraft?
b. How many moles of each product are formed?
For a (unbalanced) reaction: NaOH +CO2-Na2CO3 + H2O, the moles of NaOH and moles of each product are formed are mathematically given as
a) Moles of NaOH =44.05
b) Moles of Na2CO3=21.0
Moles of H2O= 21.0What is the moles of NaOH and what moles of each product are formed?
Generally, the equation for the Chemical reaction is mathematically given as
2 NaOH(aq)+ CO2(g)------> Na2CO3(aq)+ H2O(l)
Therefore
Moles of CO2= 925/44
Moles of CO2=21.0
Hence
Moles of NaOH = 2 x Moles of CO2
Moles of NaOH = 2x925/44
Moles of NaOH =44.05
In conclusion
Moles of Na2CO3 925/44
Moles of Na2CO3=21.0
And
Moles of H2O= 925/44
Moles of H2O= 21.0
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How many atoms of oxygen are present: 3Al2(SO4)3
a. 36
b. 12
c. 10
d. 24
Answer:
the answer is 12
Explanation:
In one formula unit of Al2(SO4)3 A l 2 ( S O 4 ) 3 , there would be twelve atoms of oxygen.
What is h+ concentrate in a solution with a pH of 1.25 round to nearest hundredth
Answer:
0.0562
Explanation:
Ph=-log[H+]
to find the h+ is the antilogarithm of the Ph.
Which is 10 raised to the power - Ph.
Answer:
5.62
-2
Explanation:
What is the H+ concentration in a solution with a pH of 1.25? Round to the nearest hundredth.
5.62 × 10n M n= -2
20 L of nitrogen gas are collected at a temperature of 50°C and 2 atm. How many grams of nitrogen gas were collected?
Answer:
0.1077 grams
Explanation:
First we will employ the ideal gas law to determine the number of moles of nitrogen gas.
PV=nRT
P=2 atm
V=20L
R=0.08206*L*atm*mol^-1*K^-1
T=323.15 K
Thus, 2atm*20L=n*0.08206*L*atm*mol^-1*K^-1*323.15K
K, atm, and L cancels out. Thus n=2*20mol/0.08206*323.15=1.5 moles
Lastly, we must convert the number of moles to grams. This can be done by dividing the number of moles by the molar mass of nitrogen gas, which is 14 grams.
1.5/14=0.1077 grams
13. Subtract 0.291 from 0.4
I need a breakdown of the answer?
-0.109 is the answer :)
You could basically just do column subtraction
2. What are the main processes by which metamorphic rock is created?
erosion and deposition
melting and volcanic activity
erosion and heat
heat and pressure
If you were to classify a newly discovered animal, what would you want to know first?
Does it live on land or in the sea?
Does it have a backbone?
Does it have hair?
Does it have vascular tissue?
Answer:
A
Does it live on land or sea.
Answer:
C:
I would check that does it have hair or not because hair provides info about the DNA which can help me if that specific animal has evolved from DNA of any other animal..
Hope it helped you.
1.) Explain the difference between weather and climate.
2.) Why is latitude a factor in the uneven heating of Earth's surface?
3.) A particular air mass contains extremely cold, dry air. Based on this information, how would this air mass most likely be classified?
4.) What's the intertropical convergence zone (ITCZ)?
5.) How do polar jet streams differ from tropical jet streams?
:::::::::::::::::::::::::::::::::::::::::::::::: Answers::::::::::::::::::::::::::::::::::::::::::::::
1.) Weather refers to temporary atmospheric conditions that are occurring at a given point and time. Climate refers to the average weather conditions that occur in an area over an extended period.
2.) Regions nearer the equator receive sunlight more directly than regions located farther from the equator. As a result, regions near the equator experience warm temperatures all year. Regions located farther from the equator experience more temperature fluctuations.
3.) An air mass containing extremely cold, dry air would likely be classified as a continental arctic (cA) air mass.
4.) The ITCZ is the point at which trade winds from the Northern Hemisphere converge with trade winds from the Southern Hemisphere. This area typically experiences calm weather.
5.) Polar jet streams occur at higher latitudes. They separate the polar easterlies from the prevailing westerlies. Tropical jet streams occur at lower latitudes. They separate the trade winds from the prevailing westerlies.
why did u gave answer before
Explanation:
1) Weather refers to temporary atmospheric conditions that are occurring at a given point and time. Climate refers to the average weather conditions that occur in an area over an extended period.
2) Regions nearer the equator receives sunlight more directly than regions located farther from the equator. As a result, regions near the equator experience warm temperatures all year. Regions located farther from the equator experience more temperature fluctuations.
3) An air mass containing extremely cold, dry air would likely be classified as a continental arctic air mass.
4) The ITCZ is the point at which trade winds from the Northern Hemisphere converge with trade winds from the Southern Hemisphere. This area typically experiences calm weather.
5) Polar jet streams occur at higher latitudes. They separate the polar easterlies from the prevailing westerlies. Tropical jet streams occur at lower latitudes. They separate the trade winds from the prevailing westerlies.
Name the following iconic compounds of Ca3(PO4)2
Answer:
ca2+ and po3+
Explanation:
these ions are formed after the dissociation of the compound
What is the molarity of a solution formed from 0.625 moles of NaCl with a total volume of 250 mL
Answer:
2.5 M
Explanation:
.625 M / .250 Liter = 2.5 M
3.4 For each of the following elements, locate it in the Periodic Table, and indicate whether it is a metal, metalloid, or non-metal. (3) 4.4.1 Germanium (Ge) 4.4.2 Selenium (Se) 4.4.3 Beryllium (Be)
According to its location in the periodic table:
Ge: Period 4, Group 14. Metalloid.Se: Period 4, Group 6, Non-metal.Be: Period 2, Group 2, Metal.What is a periodic table?It is a table in which elements are ordered in Groups (columns) and Periods (rows).
According to their ubication and properties they can be classified in:
Metals: occupy the left and center of the table.Metalloids: occupy the right of the table (dark green in the attached table).Non-metals: occupy the right of the table (yellow and light green in the attached image).Let's locate and classify the following elements:
Germanium: Period 4, Group 14. Metalloid.Selenium: Period 4, Group 6, Non-metal.Beryllium: Period 2, Group 2, Metal.Learn more about the periodic table here: https://brainly.com/question/14514242
1. If the water is not completely removed from the salt during the heating process will the reported water-to-salt mole ratio (X) be high or low? Explain
Answer:
The water in the hydrate (referred to as "water of hydration") can be removed by heating the hydrate. When all hydrating water is removed, the material is said to be anhydrous and is referred to as an anhydrate.
Explanation:
If the water is not completely removed from salt during heating process it will result in higher mole ratio of water to salt as mass of water will also be accounted while calculating mole ratio.
What is salt?Salt is defined as a chemical compound which is ionic in nature and consists of cation and an anion.It has no net electrical charge as the charges are completely neutralized in case of salts.
They are classified as acidic, basic or neutral salts depending on the ions they produce on dissolution.They have wide variety of colors depending on the elements from which they are formed and have five basic tastes.Salts are usually odorless except a few exceptions . They are highly soluble in water and are insulators in the solid state, to make them conductive they need to be melted or dissolved.
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The partial pressures of gases A, B, and C in a mixture are
0.75 atmosphere, 0.25 atmosphere, and 1.25 atmospheres,
respectively. What is the total pressure of the gas mixture
in millimeters of Hg?
A. 1710 mm of Hg
B.
1140 mm of Hg
C. 760.0 mm of Hg
D. 570.0 mm of Hg
Answer:
A
Explanation:
.75 + .25 + 1.25 = 2.25 atm
1 atm is 760 mm hg
2.25 * 760 = 1710 mm HG
Answer:
[tex]\huge\boxed{\sf 2.25\ atm = 1710\ mm\ of\ Hg}[/tex]
Explanation:
Partial pressure of gas A = 0.75 atm
Partial pressure of gas B = 0.25 atm
Partial pressure of gas C = 1.25 atm
Total partial pressure = 0.75 atm + 0.25 atm + 1.25 atm
= 2.25 atm
We know that:
1 atm = 760 mm of Hg
Multiply 2.25 to both sides
2.25 atm = 760 × 2.25 mm of Hg
2.25 atm = 1710 mm of Hg
[tex]\rule[225]{225}{2}[/tex]
Calculate the mass of NaCO3 used in experiment. SHOW WORK — 15 points!!
Mass of empty evaporating dish: 46.233g
Mass of evaporating dish + sodium bicarbonate: 48.230g
Mass of evaporating dish + product after 1st drying: 47.504 g
Mass of evaporating dish: 46.233g
Mass of evaporating dish + product after 2nd drying: 47.485
The mass of sodium bicarbonate (NaHCO₃) used in the experiment is 1.997 g
Calculating massFrom the question we are to calculate the mass of NaHCO₃ (sodium bicarbonate) used in the experiment
From the given information
Mass of empty evaporating dish = 46.233g
Mass of evaporating dish + Sodium bicarbonate = 48.230g
∴ Mass of sodium bicarbonate (NaHCO₃) = [Mass of evaporating dish + Sodium bicarbonate] - [Mass of empty evaporating dish]
Mass of sodium bicarbonate (NaHCO₃) = 48.230g - 46.233g
Mass of sodium bicarbonate (NaHCO₃) = 1.997 g
Hence, the mass of sodium bicarbonate (NaHCO₃) used in the experiment is 1.997 g
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what is packing fraction ?
state the formula used to calculate it.
thankyou ~
Answer:
please mark me brainliestExplanation:
Packing fraction is defined as a way of expressing the variation of isotopic mass from whole mass number (atomic mass). This fraction can have positive or can have negative sign. A positive packing fraction describes a tendency towards instability.The equation for packing fraction is: Packing fraction = (N atoms) x (V atom) / V unit cell. N atoms is the number of atoms in a unit cell. V atom is the volume of the atom, and V unit cell is the volume of a unit cell. Substitute the number of atoms per unit cell into the equation.5. Which equation represents a balanced chemical equation?
O CF4 + 2Br2 → CBr4 + 2F2
O N2 + 3F2 + NF3
OPA+ O2 + 2P203
O K+ Cl2 + 2KCI
Answer:
Cf4 + 2Br2 gives CBr4 +2F2
Explanation:
b/c there are balanced
The correct IUPAC name for 2-isopropylbutane is: a) 2-ethylpentane b) 2,3-dimethylpentane c) 2-methylhexane d) 3-methylhexane
Answer:
a
Explanation:
On drawing the structure, the most Carbon atoms in a row is 5
⇒ pentaneThe remaining two carbon atoms are connected to the 2nd carbon atom
2-ethylIUPAC name is :
2-ethyl + pentane2-ethylpentaneWhat is the difference between weight and mass?
a
Mass depends on gravity and weight depends on the amount of matter.
b
Mass depends on electrons and weight depends on pounds.
c
Mass depends on the amount of matter and weight depends on gravity and mass.
d
Mass depends on pounds and weight depends on electrons.
Answer:
It's C. Mass Depends on the amount of matter and weight depends on gravity and mass.
Explanation:
Hope this helps
As a solution becomes more basic:
Predict: How do you think you could use the Gizmo to make the color gray? _____________
_________________________________________________________________________
Observe: Change the Red, Green, and Blue values to 90. What color does this produce?
_________________________________________________________________________
The simplest way to make the color gray is by mixing white and black colors, but it can also be created by mixing colors such as red and green.
What is the grey color?This is considered a neutral and cool color that can be naturally found in elements such as rocks.
How can you make this color by mixing other colors?Neutral gray: The eeasiest way to create this color is by mixing black and white. This would give you a very neutral gray.Other shades: It is also possible to make this color by mixing colors that are opposite in the colors scale such as:Yellow and purples.Red and green.This would not be a neutral gray as it will resemble a little bit the original colors.
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i’ll give brainliest to whoever can give me these answers or at least the intra and intermolecular bonds answers
#1
Intermolecular bonds:-
One Single bond#Carbon monoxide
Formula:-
COMolecular geometry
LinearDrawing
C=OBonds=3
#Silicon tetrafluoride
Formula
SiF_4geometry
TetrahedralBonds=4
#Titanium (4) Sulfide
TiS_2Geometry
LinearBonds=2
6. How many molecules of ammonia are present in 34 g of ammonia (Formula = NH3)?
how does the melting point of a substance indicate the strength of its intermolecular force of attraction
Answer:
The molecules are held together by intermolecular force of attraction. More the force the fusion takes after some time only that means the melting point is high. So molecules with greater molecular forces have high melting point and less molecular forces have low melting point.
Answer:
On heating a solid, the kinetic energy of the particle increases. The particle start vibrating with greater speed. The energy supplies by heat overcomes the force of attraction between the particles.
If this force of attraction is more, then more heat energy will be necessary to overcome this force. So, the melting point of the solid will be higher.
There are 7 named classes of hazardous materials.
O True
O False
False, there are 9 named classes of hazardous materials.
What are hazardous materials?Hazardous materials are substances or chemicals that pose a health hazard, a physical hazard, or harm to the environment.
There are 9 hazardous substances symbols you need to know: flammable, oxidising, explosives, gas under pressure, toxic, serious health hazard, health hazard, corrosive and environmental hazard.
Hence, the statement is false.
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Does combining the glue and water create a physical or chemical change?
The combination of glue and water creates a physical change rather than a chemical change.
Physical and chemical changesPhysical changes are changes to the physical properties of materials and are usually reversible.
Chemical changes, on the other hand, are changes to the chemical properties of materials and are usually irreversible.
Mixing water with glue will only result in the glue being diluted with water and creates no chemical reaction. The glue can be recovered by distilling off the water.
Thus, mixing glues with water is only a physical change as the chemical properties of the glue remain intact.
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If a 50.00 mL of 0.0155 M HI(aq) is mixed with 75.00 mL of 0.0106 M KOH(aq), what is the pH of the final solution
If a 50.00 mL of 0.0155 M HI(aq) is mixed with 75.00 mL of 0.0106 M KOH(aq), the pH of the final solution is mathematically given as
pH=13.16
What is the pH of the final solution?Generally, the equation for the Chemical reaction is mathematically given as
2HI+Ba(OH_2)--->BaI2+2H2O
Therefore
pOH=-log{OH}
pOH=-log(6.52)
pOH=0.8142
In conclusion, for the pH
pH+pOH=14
pH=14-0.8142
pH=13.16
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