Answer:
The amount of water converted from liquid to gas with 6,768 joules is approximately 3.035 g
Explanation:
The amount of heat required to convert a given amount of liquid to gas at its boiling point is known as the latent heat of evaporation of the liquid
The latent heat of evaporation of water, Δ[tex]H_v[/tex] ≈ 2,230 J/g
The relationship between the heat supplied, 'Q', and the amount of water in grams, 'm', evaporated is given as follows
Q = m × Δ[tex]H_v[/tex]
Therefore, the amount of water, 'm', converted from liquid to gas at the boiling point temperature (100°C), when Q = 6,768 Joules, is given as follows;
6,768 J = m × 2,230 J/g
∴ m = 6,768 J /(2,230 J/g) ≈ 3.035 g
The amount of water converted from liquid to gas with 6,768 joules = m ≈ 3.035 g.
What is the main function of the muscular system is to allow the of the body
Answer:
The muscular system is composed of specialized cells called muscle fibers. Their predominant function is contractibility. Muscles, attached to bones or internal organs and blood vessels, are responsible for movement. Nearly all movement in the body is the result of muscle contraction.
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The muscular system is composed of specialized cells called muscle fibers.
Their predominant function is contractibility. Muscles, attached to bones or internal organs and blood vessels, are responsible for movement.
Nearly all movement in the body is the result of muscle contraction.
What is this and please explain why :)
NEED HELP WIT 6th grade science homework PLZ HELP
Answer:
the answer is it results in a change of temperature in both objects
What might happen if the strong force didn’t exist
Answer:
d
Explanation:
EASY POINTS GIVEN! WILL MARK BRAINLIEST:)
Answer:
faxs
Explanation:
Answer:
the first oneeeeeeeee
How do organisms get energy from their environment?
Answer: They either eat other organisms or plants they take in the sun and water.
5.00g of CaC12 in 95.0 g of water
Answer:
Explanation:
lo8
1.
Acompound formed during the incomplete combustion of plastics shows the following percentage composition:
44.76%
1.25%H
44.05 % CI 9.94 % O
The molar mass is known to be 321.97 g/mol. Determine the empirical formula and the molecular formula for this compound
The empirical formula : C₆H₂Cl₂O
The molecular formula : C₁₂H₄Cl₄O₂
Further explanationGiven
The percentage composition
Required
The empirical formula and the molecular formula
Solution
The mol ratio of the components :
C : H : Cl : O
=44.76/12 : 1.25/1 : 44.05/35.5 : 9.94/16
=3.73 : 1.25 : 1.241 : 0.621 divide by 1.241
= 3 : 1 : : 1 : 0.5 x 2
= 6 : 2 : 2 : 1
The empirical formula : C₆H₂Cl₂O
(Empirical formula)n=molecular formula
(C₆H₂Cl₂O)n=321.97
(160.986)n=321.97
n=2
(C₆H₂Cl₂O)₂=C₁₂H₄Cl₄O₂
The molecular formula : C₁₂H₄Cl₄O₂
What is the atomic mass of aluminium?
Which is the correctly balanced equation? *
A Ca + HCl → CaCl2 + H2
B Ca + HCl → CaCl2 + H2
cCa + H2Cl2 → CaCl2 + H2
D Ca + 2HCl → CaCl2 + H2
PLEASE ANSWER I WILL GIVE BRAINLIEST
Answer:
Ca + 2HCl → CaCl2 + H2
Explanation:
This ia balanced equation on both side 1 Ca and 2 H and 2 Cl are present
what is a brine solution ?
Answer:
the aqueous solution of Naclis known as brine
help meeeeeeee??????????
Answer:
njjii
Explanation:
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Although no blueprints of the pyramids have been found, what evidence suggests humans, not aliens, built the pyramids?
i need help asap plz
Answer:
Incorrect
Explanation:
Sodium has 11 atoms
Answer:
[tex]incorrect......[/tex]
what gas is formed when zinc reacts with dilute hydrochloric acid
Answer:
Hope it helps.
Explanation:
When zinc reacts with hydrochloric acid it produces zinc chloride and hydrogen gas.
6
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Which are examples of a medium?
water and air
amplitude and wavelength
crests and troughs
compressions and rarefactions
Answer:
water and air
Explanation:
The examples of medium from this problem is water and air.
A medium is an agency or a means of propagating energy, waves or even facilitating a chemical reaction.
Fluids are very good medium in chemistry for chemical reactions. The two most common media used are air and water.
In physics, a vacuum is an empty space that has been evacuated. It also serves as a medium to study some physical phenomenon.
Answer:
a
Explanation:
a single atom found on the periodic table is know as an
Answer:
Element
Explanation:
A chemical element is a substance that contains only one type of atom, which is the smallest particle of an element
!!PLEASE HELP!! Will give brainliest and like and rate 5 stars!! please help me i don't know how to do this. Please balance the equation and say what type of reaction it is (synthesis, decomposition, single replacement, double replacement, or combustion).
Answer:
The equation is already balanced. It is a double replacement.
Explanation:
The equation is balanced since there are the same amounts of each element on both sides. A double replacement is when AB + CD = AD + CB. In this case, Ag (A) reacts with CL(D) and Na (C) reacts with NO3 (B).
What happens to the P on ATP when it leaves the ATP molecule?
Answer: ATP is the energy currency molecule which is required for cellular processes.
Explanation:
When the cell require metabolic energy to perform a particular a task. From the ATP or adenosine triphosphate molecule one of three phosphate molecule gets displaced and liberates the resulting molecule becomes adenosine diphosphate or ADP. The phosphate molecule is used by the cell to perform different cellular and metabolic functions as a source of metabolic energy. The phosphate is released by the hydrolysis of the phosphoanhydride bond with the other phosphate group.
What is the Chemical Formula and Net Ionic Equations for all three solutions.
Answer:
See answer below
Explanation:
As you are asking for chemical formula and ionic equation, then, I will assume that after the station #3 below, are the solutions you are requiring.
You are also not specifing if you want for example, result of solution 1 + solution 3. If you need that, please post that on another question.
Now for the chemical formula, you need to identify the elements in all 3 solutions, and also the type of compound.
1. Solution 2 Potassium Iodide:
In this case we have Potassium on one side, and Iodine on the other side, the symbol for those are K and l. As Potassium have the +1 oxidation state, cause is the only one that it can have, when it's next to an halide like chlorine or bromine, it will form a binary salt. The halides, usually work with the lowest oxydation state. In the case of Iodide it will be -1, so, the formula will be:
KI
And the net ionic equation will be the chemical equation that shows how the charges and atoms are balanced. In this case it would be:
K⁺ + I⁻ ------> KI
2. Solution 1 and 3, Lead (II) nitrate and Sodium carbonate:
In this case I will work with both, because both of the solution are tertiary compounds. In this cases, we have two tertiary salt, The Sodium symbol is Na, and is working with it oxydation state +1. Carbonate is an anion and have the formula CO₃ working with the oxydation state -2. Lead can work with oxidation state +2 and +4. It's symbol is Pb. Nitrate is NO₃ and works with oxydation state -1 instead.
The chemical formula and ionic equation for both will be:
Lead(II) nitrate: Pb(NO₃)₂
Sodium Carbonate: Na₂CO₃
And the net equations:
Lead nitrate: Pb²⁺ + 2NO₃⁻ ------> Pb(NO₃)₂
Copper sulfate: 2Na⁺ + CO₃²⁻ -------> Na₂CO₃
Hope this helps
Which pair of elements has the most similar properties?
A) N and P
B) K and He
C) I and CA
D) Li and B
Answer:
So, the elements with similar properties to sodium (Na) are all of those elements in the same Group.
Explanation:
The ones "most" similar would be the ones closest in mass as well. Those would be Lithium (Li) and Potassium (K).
Answer:A) N and P
Explanation:
N and P, because they are in the same group on the periodic table. This is because they both have 3 valence electrons, and properties of elements are dependent partly on the number of valence electrons they have.
CH4 + 202 → CO2 + 2H2O
How many grams of O2 needed to react with 2 moles of CH4?
100 g O₂
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
BracketsParenthesisExponentsMultiplicationDivisionAdditionSubtractionLeft to RightChemistry
Atomic Structure
Reading a Periodic TableStoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[RxN - Balanced] CH₄ + 2O₂ → CO₂ + 2H₂O
[Given] 2 mol CH₄
[Solve] x g O₂
Step 2: Identify Conversions
[RxN] 1 mol CH₄ → 2 mol O₂
[PT] Molar Mass of O - 16.00 g/mol
Molar Mass of O₂ - 2(16.00) = 32.00 g/mol
Step 3: Stoichiometry
Set up conversion: [tex]\displaystyle 2 \ mol \ CH_4(\frac{2 \ mol \ O_2}{1 \ mol \ CH_4})(\frac{32.00 \ g \ O_2}{1 \ mol \ O_2})[/tex]Multiply/Divide: [tex]\displaystyle 128 \ g \ O_2[/tex]Step 4: Check
Follow sig fig rules and round. We are given 1 sig fig.
128 g O₂ ≈ 100 g O₂
Mass of O₂= 128 g
Further explanationGiven
Reaction
CH₄ + 20₂ → CO₂ + 2H₂O
2 moles of CH₄
Required
Mass of O₂
Solution
In a chemical equation, the reaction coefficient shows the mole ratio of the compounds involved in the reaction, reactants or products
From the equation, mol ratio of CH₄ : O₂ = 1 : 2, so moles O₂ :
= 2/1 x moles CH₄
= 2/1 x 2
= 4 moles
Mass of O₂ :
= mol x MW
= 4 x 32 g/mol
= 128 g
What is the freezing point of Titanium?
Answer and Explanation:
The freezing point of Titanium is 1668 C or 3034.4 F...
The freezing point of Titanium (Ti) is 1668°C.
What is Titanium ?
Titanium is a chemical element. The symbol of titanium is Ti. Atomic number of Ti is 22. Electronic configuration of Titanium is [Ar] 3d² 4s².
What is Freezing point ?The temperature of a liquid which changes its state and becomes a solid is called as Freezing point. The freezing point of Titanium is 1668°C.
Thus from the above conclusion we can say that The freezing point of Titanium (Ti) is 1668°C.
Learn more about the Freezing point here: https://brainly.com/question/17048792
#SPJ2
How many grams is 5.4x10 to the 23 molecules of al2o3?
Answer:
91.49 grams
Explanation:
No of molecules = no of moles × Avogadro's number
No of moles = No of molecules / Avogadro's number
Number of moles = 5.4×10^23/6.02×10^23
Number of moles = 0.897 moles of Al2O3
Number of moles = mass in gram / molar mass
Mass in gram = number of moles× molar mass
Mass in gram = 0.897× 102
91.49 grams
4.Identify each substance in the following word equation as a reactant or a product
limestone heat lime + carbon dioxide
5.What is the difference between an exothermic and endothermic reaction?
Explanation:
4. limestone heat lime + carbon dioxide
The reactants in this expression above is limestone
The products of the reaction is carbon dioxide and lime
Reactant is the species that gives the product and it is usually found on the left hand side of the expression.
The product is the substance on the right hand side of the expression that forms through the experiment.
Heat is used to facilitate the reaction.
5. An exothermic reaction is a reaction in which heat is given off.
An endothermic reaction is a reaction in which heat is absorbed in the process.
An exothermic reaction is always warmer after the reaction whereas an endothermic reaction is colder at the end of the reaction.
The dog will eat more food to store fat and grow more hair.
The dog will lay in the sunlight to transpire
The dog will pant to circulate air throughout the body to cool
down
3.
The dog will grow a thick winter coat to keep warm during the
In the summer months, what is this dog's likely response to the rising temperatures?
summer
CLEAR ALL
hibernation exclamation mark
Please actually try when you answer. If you don't know the answer, don't answer and say that, I don't give a flip if you don't know the answer. How does a cell at the end of the first phase of the cell cycle differ from a cell at the end of the second phase?
Answer:
See the answer below
Explanation:
Knowing that the cell cycle has two phases
the first phase which is the interphase; andthe second phase, the m phaseA cell at the end of interphase would have grown in volume and have a doubled amount of DNA compared to the same cell at the end of m phase. Such a cell would also have more biochemical contents than its counterpart at the end of m phase.
The interphase is divided into;
G1 phase,S phase; andG2 phaseA cell at the end of m phase undergoes massive growth and development at the G1 phase, doubles its DNA at the S phase through replication, and synthesizes proteins at the G2 phase before hopping into the m phase again.
What is the weight of the water that is displaced by a floating object compared to the weight of the object?
Answer:
The amount of fluid displaced is directly related (via Archimedes' principle) to its volume. In the case of an object that sinks (is totally submerged), the volume of the object is displaced. In the case of an object that floats, the amount of fluid displaced will be equal in weight to the displacing object.
Explanation:
wikipedia
A sample of silver has a mass of 21 grams
and a volume of 2 cm3. What is the density
of silver?
Answer:
[tex]density \: of \: the \: silver = \frac{mass}{volume} = \frac{21}{2} \\ = 10.5 \: gram {(cm)}^{ - 3} [/tex]
10.5 gram(cm)^-3 is the right answer.Explanation:
recall that density is equal to mass/volume :21÷2= 10.5g/cm3
How many moles of Al2O3 are formed from the reaction of 6.38 mol O2 and 9.15 mol Al?
Answer:
The number of moles of Al2O3 formed is about 4.25 moles
Explanation:
