Answer:
Perform research to see if other polar molecules have high specific heat
Explanation:
The specific heat of a substance is the amount of heat required to raise the temperature of a unit mass of the substance by 1°C.
In this question, the student is trying to establish a relationship between polarity and specific heat of substances. This claim can be tested by performing a research to see if other polar molecules have high specific heat.
If the research shows that a large number of other polar molecules have high specific heat, then the claim is confirmed to be true.
Which radioisotope is naturally occurring?
Answer:
[tex]\frac{131}{53} I[/tex]
Explanation:
A naturally occurring element is an element that is not produced in a nuclear reaction.
Most of the trans-uranium elements are not natural, they are all synthetic elements which are produced as a result of nuclear reactions. They are unknown in nature.
Apart from [tex]\frac{131}{53} I[/tex], all other radioisotopes listed among the options are not natural elements.They are products of nuclear reactions.
2
Which of the following equations is not balanced?
A Fe +S → FeS
B
KOH + HCl → KCI + H2O
2Mg + O2 + 2Mgo
D
NaCl + H2SO4 → Na2SO4 + HCI
Answer:
equation (D) is not balanced
balanced
2NaCl + H2SO4 —> Na2SO4 + 2HCl
The chemical equation not balanced is:
NaCl + H₂SO₄ → Na₂SO₄ + HCI
What is the balanced chemical equation?A chemical equation can be described as the reactants involved in the reaction, products produced, and an arrow denoting the direction of the chemical reaction. The chemical equation is a way to represent the chemical reaction in a short way.
A balanced equation in which the number of atoms of each element is equal on both sides of the chemical equation.
The law of conservation of mass is needed to follow while balancing the equation. The total mass of the elements on both sides (reactant and product side) in a balanced chemical equation.
NaCl + H₂SO₄ → Na₂SO₄ + HCI is not a balanced chemical equation as the number of hydrogen and sodium on both sides. The balanced chemical equation will be:
2 NaCl + H₂SO₄ → Na₂SO₄ + 2 HCI
Learn more about the balanced chemical equation, here:
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In the Reaction CuCl2 + 2 NaNO3 —> Cu(NO3)2 + 2 Naci
If 17.2 grams of copper (II) chloride, CuCl2 reacts with 22.6 grams of sodium nitrate, NaNO3, how many grams of sodium chloride, NaCl, will be produced?
Molor mass of CuCl2 = 134.45 g/mol
Molar mass of NaNO3 = 85.00 g/mol
Molar moss of NOCI = 58.44 g/mol
Answers:
17.2 grams CuCl2= - -g NaCl
22.6 grams NaNO3= - -g NaCl
What is the Limiting Reactant?
Explanation:
The molar mass of the compounds are incorrect
Please help!!
All fake answers get reported immediately. Yes, I am a girl -_-
Answer:
1.)C₃H₈O
2)OH
3.)1-propanol
1.) C4H8O
2.) C2H6O or CH3CH2OH
3.)Ethanol
Explanation:
Hope this help
Mrs. Borunda has a sample of oxygen gas that occupies a volume of 600 L at 400 atm pressure. What will the pressure be if she increases the volume to
800 L?
300 atm
450 atm
540 atm
250 atm
Answer:
P₂ = 300 atm
Explanation:
Given that,
Initial volume, V₁ = 600 L
Initial pressure, P₁ = 400 atm
We need to find the pressure if the volume is 800 L.
We know that the relation between pressure and volume is given by :
[tex]P\propto \dfrac{1}{V}\\\\\dfrac{P_1}{P_2}=\dfrac{V_2}{V_1}\\\\P_2=\dfrac{P_1V_1}{V_2}\\\\P_2=\dfrac{600\times 400}{800}\\\\P_2=300\ atm[/tex]
So, the new pressure is equal to 300 atm.
Two ways the atmosphere can be divided
Answer:
The atmosphere can be divided into layers based on its temperature, as shown in the figure below. These layers are the troposphere, the stratosphere, the mesosphere and the thermosphere.
Why are humans responsible for oil spills
Answer:
Oil spills into rivers, bays, and the ocean most often are caused by accidents involving tankers, barges, pipelines, refineries, drilling rigs, and storage facilities.
Spills can be caused by:
people making mistakes or being careless.
equipment breaking down.
natural disasters such as hurricanes.
deliberate acts by terrorists, countries at war, vandals, or illegal dumpers.
Explanation:
Hope this helped Mark BRAINLIEST!!!
How does velocity affect the movement of an object?
Answer:
when the velocity is at a higher *rate of speed*, the faster the object will move!
Explanation:
Select the correct answer.
In an isolated system, two copper bars at different temperatures transfer energy until both are at the same temperature. How would the
transfer of energy be different if the bars were in an open system?
O A. Energy transfer would occur only between the copper bars.
OB. Energy transfer would occur between the copper bars and the surroundings.
Ос. No energy transfer would occur between the copper bars or the surroundings.
OD. Energy transfer would occur only with the surroundings.
Reset
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San ou
Answer:
OB. Energy transfer would occur between the copper bars and the surroundings.
Explanation:
We define an isolated system as a system in which there is neither exchange of material nor energy while an open system is one in which materials and energy can be exchanged with the environment.
Given an open system consisting of two copper bars at different temperatures, energy will not only be exchanged between the copper bars but also between the copper bars and the environment.
(part 1 of 3) Copper reacts with silver nitrate through a single replacement. If 1.29 g of silver are produced from the reaction, how much copper(II) nitrate is also produced? Answer in units of mol. (part 2 of 3) How much Cu is required in this reaction? Answer in units of mol. (part 3 of 3) 1.0 points How much AgNO3 is required in this reaction? Answer in units of mol.
Answer:
See explanation.
Explanation:
Hello there!
In this case, according to the described chemical reaction, we first write the corresponding equation to obtain:
[tex]Cu+2AgNO_3\rightarrow 2Ag+Cu(NO_3)_2[/tex]
Thus, we proceed as follows:
Part 1 of 3: here, since the molar mass of silver and copper (II) nitrate are 107.87 and 187.55 g/mol respectively, and the mole ratio of the former to the latter is 2:1, we can set up the following stoichiometric expression:
[tex]m_{Cu(NO_3)_2}=1.29gAg*\frac{1molAg}{107.87gAg}*\frac{1molCu(NO_3)_2}{2molAg}*\frac{187.55gCu(NO_3)_2}{1molCu(NO_3)_2} \\\\m_{Cu(NO_3)_2}=1.12gCu(NO_3)_2[/tex]
Part 2 of 3: here, the molar mass of copper is 63.55 g/mol and the mole ratio of silver to copper is 2:1, the mass of the former that was used to start the reaction was:
[tex]m_{Cu}=1.29gAg*\frac{1molAg}{107.87gAg}*\frac{1molCu}{2molAg}*\frac{63.55gCu)_2}{1molCu} \\\\m_{Cu}=0.380gCu[/tex]
Part 3 of 3: here, the molar mass of silver nitrate is 169.87 g/mol and their mole ratio 2:2, thus, the mass of initial silver nitrate is:
[tex]m_{AgNO_3}=1.29gAg*\frac{1molAg}{107.87gAg}*\frac{2molAgNO_3}{2molAg}*\frac{169.87gAgNO_3}{1molAgNO_3} \\\\m_{AgNO_3}=2.03gAgNO_3[/tex]
Best regards!
Please help me with this homework
Answer:
The answer is C density.
What is the molarity of a 9.13 L soda that contains 13.83 of sugar?
Answer:
1.52 M
Explanation:
Molarity of a solution is calculated as follows:
Molarity = number of moles (n) ÷ volume (V)
Based on the information given in this question,
Volume of soda (V) = 9.13 L
number of moles = 13.83 mol
Molarity = 13.83 ÷ 9.13
Molarity = 1.52 M
Drag each tile to the correct box,
Arrange the processes of the water cycle in the correct order, starting with the heat from the Sun.
Answer:
4
3
2
6
1
5
I hope this helped!
Perform an on-line search to find real-world uses for the titration process. State what you find below.
Answer:
The titration process has quite a few real-world uses, including key roles in the food industry and medical community. The titration process is essentially an analytical technique, as it is used to determine a chemical or physical property of a chemical substance, element, or mixture (such as food). Specifically in the food industry, it is used to allow food manufactuers to determine the quantity of a reactant in a sample. To provide an example, it can be used to find the specific amount of stuff that is usually labeled on the nutrition label, such as sugar, salt, protein, calcium, vitamin C, etc. As for the medical world, pharamcists typically use this process to get the proper mix when compounding medicines. It is used to get the necessary proportions in intravenous drips.
A 0.885 M solution of KBr whose initial volume is 82.5 mL has more water added until its concentration is 0.500 M. What is the new volume of the solution?
Answer:
[tex]V_2=146mL[/tex]
Explanation:
Hello there!
In this case, since the equation for the calculation of dilutions is:
[tex]M_1V_1=M_2V_2[/tex]
Whereas M is the molarity and V the volume, because the final concentration is lower than the initial. Thus, since we are asked to calculate the final volume, we solve for V2 as follows:
[tex]V_2=\frac{M_1V_1}{M_2}=\frac{0.885M*82.5mL}{0.500M}\\\\V_2=146mL[/tex]
Best regards!
The dark areas on the world map show places with climates that are alike. The table shows information for those places. A
student is using the map and table to describe the climates of those places.
Which sentence describes the climates of the dark areas
on the map?
A. They are arid climates because they are dry and
hot
B. They are polar climates because they are dry
and cold
C. They are tropical climates because they are hot
and wet.
D. They are temperate climates because they are
mild and moist.
Usual Temperature Usual Precipitation
Low to very low
Little or no snow all year
temperatures all year
Answer:
Choice B
They are polar climates because they are dry
and cold
Past due! Help please I choose the middle picture for my hypothesis being inclusive can you help explain why and how it shows it’s being inclusive?
Answer:
Explanation:
its supposed to be not supported not inclusive because you said mix
CH3OH is an example of a ____ hydrocarbon.
a.
complete
b.
substituted
c.
functional
d.
synthetic
Answer:
functional
Explanation:
c is correct
When writing the formulas for a compound that contains a polyatomic ion, ... ?
Answer:
The cation is written first in the name; the anion is written second in the name. Rule 2. When the formula unit contains two or more of the same polyatomic ion, that ion is written in parentheses with the subscript written outside the parentheses.
When writing the formula of a compound that contains polyatomic ion, the metal is written first followed by the central atom in the ion and then other atoms that surround the central atom.
A poly atomic ion refers to an ion that comprises of more than one atom. Such ions are common in chemistry. Examples of polyatomic ions include; PO4^3-, BH4^- etc.
When writing the formula of a compound that contains a polyatomic ion, the metal is written first then the central atom in the ion follows before other atoms that surround the central atom in the ion.
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Who was the leader of Iraq? *
Osama Bin Laden
Mikael Gorbachev
Şaddam Hussein
Answer: I believe it was Şaddam Hussein
Explanation:
On the following chemical equation, label the acid, the base, the
conjugate acid, and the conjugate base.
HX(aq) + H2O(1) = H30+(aq) + X (aq)
Answer:
HX (aq) + H₂O (l) ⇄ H₃O⁺ (aq) + X⁻ (aq)
Acid Base Conj. acid Conj. base
Explanation:
The equation is:
HX (aq) + H₂O (l) ⇄ H₃O⁺ (aq) + X⁻ (aq)
This is the typical equilibrium for a weak acid. It would complete if we notice the Ka.
HX (aq) + H₂O (l) ⇄ H₃O⁺ (aq) + X⁻ (aq) Ka
1 mol of hypothetic HX acid react to 1 mol of water in order to release a proton and make hydronium and generate the X⁻ anion.
HX will be the acid, in this case a weak one and water will be the base. Water is able to accept a proton to make itslef hydronium
Hydronium is the conjugate acid.
The X⁻ will be the conjugate strong base.
This ion can generate the acid form again, that's why it is strong, because it can make hydrolisis.
X⁻ (aq) + H₂O (l) ⇄ HX (aq) + OH⁻(aq) Kb
In this case, the anion will be the conjugate base which it takes a proton from water (acid form) to make a conjugate acid, the HX and a conjugate base, OH⁻
Help asap plzzzz 30 points
A chemistry teacher provides students with the amount of potassium hydroxide they need in solution form. The teacher makes the solution by dissolving 42.1 g KOH into 3.0 L of solution.
Each lab group needs 0.023 mol of KOH for their experiment. How many milliliters of the solution does each group need to provide enough dissolved moles?
mL of solution
Answer:
Do you need your 0.00 2 oz
Explanation:
Because that is the right answer
For the enough dissolving of given moles each group will need to provide 92mL of solution.
How we determine Molarity for further calculation?Molarity can be calculated as: M = n/V mol/L where,
V = volume = 3L (given)
n = no. of moles, which can be calculated as:
n = W/M, where
W = given mass = 42.1g (given)
M = molar mass = 56.1g/mol (known)
First of all we have to calculate molarity to determine the volume of solution of each groups. By putting value of n in the 1st equation, molarity can be calculated as follow:
M = 42.1 / 56.1 × 3 = 0.250 mol/L
Now in the question it is given that each group have KOH solution of 0.023 moles. So, we can calculate the volume by using the 1st equation:
M = n/V
0.250 = 0.023/V
V = 0.023mol / 0.250mol per L = 0.092L = 92mL.
Hence, 92mL of the solution will each group need to provide enough dissolved moles
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How many grams of Ca(OH)2 would be needed to make 500 mL of a 0.450 mol/L solution?
113 g
133 g
41.2 g
16.68 g
Answer:
[tex]\boxed {\boxed {\sf 16.68 \ g\ Ca(OH)_2}}[/tex]
Explanation:
Molarity is a measure of concentration in moles per liter.
[tex]molarity = \frac{moles \ of \ solute}{liters \ of \ solution}[/tex]
The molarity is 0.450 moles per liter. The moles of solute is unknown.
The volume of the solution is 500 milliliters, but we want to know the liters. We need to convert the units. Remember that 1 liter contains 1000 milliliters.
[tex]\frac{ 1 \ L}{1000 \ mL}[/tex][tex]500 \ mL *\frac{ 1 \ L}{1000 \ mL}[/tex][tex]500 *\frac{ 1 \ L}{1000 }[/tex][tex]\frac{500}{1000} \ L =0.500 \ L[/tex]So, we have values for all the variables:
molarity= 0.450 mol/L moles of solute = xliters of solution =0.500 LSubstitute the values into the formula.
[tex]0.450 \ mol /L *\frac{x}{0.500 \ L}[/tex]
We want to solve for x, the moles of solute. x is being divided by 0.500 liters. The inverse of division is multiplication, so multiply both sides by 0.500 L.
[tex]0.500 \ L *0.450 \ mol /L =\frac{x}{0.500 \ L}*0.500 \ L[/tex]
[tex]0.500 \ L *0.450 \ mol /L =x[/tex]
The units of liters cancel.
[tex]0.500 *0.450 \ mol=x[/tex]
[tex]0.225 \ mol =x[/tex]
Now we have the moles and need to convert to grams. This is done using the molar mass (mass per 1 mole). The values are found on the Periodic Table as atomic masses, but the units are grams per mole instead of atomic mass units.
The solute is Ca(OH)₂, so lookup the molar masses of the individual elements.
Ca:40.08 g/mol O: 15.999 g/mol H: 1.008 g/molNote there is a subscript of around OH. There are 2 hydroxide molecules, so there are 2 oxygen and 2 hydrogen atoms. We must multiply their molar masses by 2 before adding all the values.
Ca(OH)₂= 40.08 + 2(15.999)+2(1.008)=74.094 g/molUse the molar mass as a ratio.
[tex]\frac{74.094 \ g \ Ca(OH)_2} {1 \ mol \ Ca(OH)_2}[/tex]
Multiply by the number of moles calculated.
[tex]0.225 \ mol \ Ca(OH)_2 *\frac{74.094 \ g \ Ca(OH)_2} {1 \ mol \ Ca(OH)_2}[/tex]
The units of moles of calcium hydroxide cancel.
[tex]0.225 *\frac{74.094 \ g \ Ca(OH)_2} {1}[/tex]
[tex]16.67115 \ g\ Ca(OH)_2[/tex]
16.68 grams of calcium hydroxide are needed.
I NEED HELP FAST
Identify the charges that are negative
А
B
Which formula represents an isomer of this compound?
Answer:
Explanation:
I can’t explain but this is the answer LOL
Can someone help me
Answer:
Its refraction
Explanation:
becuase refraction is the change in direction of a wave passing from one medium to another, where the straw appears to be split apart because of the waters direction.
If 4.0 mol of NO and 4.0 mol of O2 are combined, how many moles
of NO2 can be produced?
2NO + O2 —> 2NO2
Answer:
There will be 4 moles of NO2 produces at the end of the reaction.
Explanation:
First of all, you should consider that the limiting reactant is NO, since it's the first it's going to end in the reaction.
After that, the conversion factor must be done with the limiting reactant (NO). So since you have 4 mol of NO and the relation of NO with NO2 its 2:2, you will end up having 4 moles of NO2.
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Answer:
ertyuioekgdctifrofy?
Explanation:
2. Identify the limiting reactant when 4.68 g of iron reacts with 2.88 g of sulfur to produce Fes.
Fe +
_Sg → FeS
B
C с
A
+
Help please I’ll mark brainliest
Answer:
Iron is limiting reactant
Explanation:
Based on the reaction:
Fe + S → FeS
1 mole of iron reacts per mole of Sulfur
To solve this question we must convert the mass of each reactant to moles using molar masses of each reactant. As the reaction is 1:1, the reactant with the lower amount of moles is limiting reactant.
Moles Fe -Molar mass: 55.845g/mol-
4.68g * (1mol / 55.845g) = 0.0838 moles
Moles S -Molar mass: 32.065g/mol-
2.88g * (1mol / 32.065g) = 0.0898 moles
As the amount of moles of Fe < Moles S,
Iron is limiting reactant
When 4.68 g of iron reacts with 2.88 g of sulfur to produce FeS, iron is the limiting reagent.
What is limiting reagent?
If in a chemical reaction two reactants are present and one of them is present in less quantity as compared to other, is known as limiting reagent.
Given chemical reaction is:
Fe + S → FeS
From the stoichiometry of the reaction it is clear that equal moles of both reactant is required for the formation of product, so their mole ratio is 1:1.
Now we calculate the moles by using the formula:
n = W/M, where
W = given mass
M = molar mass
Moles of 4.68g of iron = 4.68g / 55.845g/mole = 0.0838 moles
Moles of 2.88 of sulfur = 2.88g / 32.065g/mole = 0.0898 moles
Moles of iron is less as compare to the sulfur, so it is the limiting reagent.
Hence, iron is the limiting reagent.
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PLEASE HELP!
an element with 8 protons and 10 neutrons
Answer:
oxygen ion O2-
Explanation:
because it has 8 protons and gave gained 2 electron so O2-.