Determine from the balanced chemical reaction if
the derived mole ratio is correct or incorrect.
2FeBr3 + 3Na2S → Fe2S3 + 6NaBr
2 moles FeBra
3 moles Na2S
Answers
Answer:
Correct
Explanation:
According to the balanced chemical reaction, 2 mol FeBr3 are consumed for every 3 mol Na2S consumed.
A balanced equation obey the law of conservation of mass. The coefficients are the numbers which are added to balance the chemical equation. Here the given mole ratio is correct.
What is a balanced equation?An equation in which the number of atoms of reactants and products on both sides of the equation are balanced is defined as the balanced chemical equation. The coefficients which are added in front of the formula of each component represents the number of the species.
A molar ratio denotes the ratio between the amounts in moles of any two compounds involved in a balanced chemical reaction. By comparing the coefficient of each component, the mole ratio can be determined.
Here for the given reaction, for every 3 moles of Na₂S consumption 2 moles of FeBr₃ is also consumed. So the molar ratio of Na₂S to FeBr₃ is 2/3. Molar ratios are used as the conversion factors between products and reactants in many chemistry problems.
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Help plz 10 pointsss———-
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Answer:
the first question is homeostasis. and the second question is the wolf panting
Explanation:
let me know if u need an explanation n ill try to give one :)
is Tungsten carbide an elementary substance
or compound?
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Answer:
Tungsten carbide (chemical formula: WC) is a chemical compound (specifically, a carbide) containing equal parts of tungsten and carbon atoms.
Answer:compound
Explanation:
The United States has landed a device on Mars.
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Answer:
They landed a Rover!
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Isn't that Awesome!?!
3. The mass percent of nitrogen in NH4Cl is *
O 16.7% nitrogen
0 25.0% nitrogen
0 26.2% nitrogen
O none of these
Answers
Answer:
None of these
Explanation:
The mass percent is 35.4% (3 s.f.)
14/4+35.5 = 14/39.5 x 100 = 35.4 (3 s.f.)
(PHYSICAL SCIENCE) Help please !!
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How can an unbalanced force affect an object?
O Unbalanced forces keep an object at rest.
Unbalanced forces cause objects to accelerate.
O Unbalanced forces cannot affect on object.
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is it true or false?
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Answer:
The rainforest is teeming with animals and insects, so you would hear humming. Frogs and birds make some of the loudest rainforest sounds.
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What is the formula for S2O5
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Answer:
chemical formula
Explanation:
After eating, nutrients must be oved to other parts of the body. Which of the following systems will transport these nutrients.
nervous
digestive
circulatory
excretory
Answers
Answer:
The circulatory system
Explanation:
A 20.0 mL of 0.27 M solution of the salt NaA has a pH of 8.70.
a) Calculate the pk, value of the acid HA.
(Correct to 3 sig. fig)
b) Calculate the pH of a solution containing 0.3 M HA and 0.1 M NaA.
(Correct to 3 sig. fig)
Answers
Answer:
a) 3.969
b) 3.489
Explanation:
a) Calculate the pk, value of the acid HA
PH of salt hydrolysis
P[tex]^{H}[/tex] = 1/2 ( pkw + pka + logC )
8.7 * 2 = 14 + log ( 0.27 ) + Pka
∴ Pka = 3.9686 ≈ 3.969
b) Calculate the PH of a solution containing 0.3 M HA and 0.1 M NaA
PH = Pka + log ( salt / acid )
= 3.9686 + log ( 0.1 / 0.3 )
= 3.9686 - 0.48 = 3.489
Biomes are characterized by temperature, precipitation, and the plant and animal communities that live there.
True or false?
Answers
False
Is specific heat capacity always equal to heat capacity?
Answers
Answer:
No specific heat capacity and heat capacity are not equal
name two examples which are not considered as matter
Answers
Answer:
Light and Sound can be considered as non-matter.
Explanation:
Various forms of Energy like Heat, Sound, Light can be considered as non-matter
The chemical symbols of hydrogen, calcium and chlorine are:
H, C, Cl
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H, Ca, Cl
Hn, Cal, Cl
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Answer:
H, Ca, Cl is the answer dude
Answer:
hydrogen is H
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. Chalk is made of CaCO 3 . How many molecules are in 5 grams of chalk?
Answers
Answer:
20.02 grams of chalk.
Explanation:
3 points
5. Which of the following is true regarding the atoms involved in a
chemical reaction? *
a) During a chemical reaction, atoms will always be combined into much larger
molecules.
b) Some of the atoms will always be changed into a different type of atom by a
chemical reaction.
c) Some of the atoms present before the reaction will always be lost during a
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d) The same number of each type of atom will always be present before and after a
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Mass is never created or lost in a chemical reaction, so the atoms of each element must stay balanced.
Calculate the calories of heat required to melt 35.0 g of ice.
Answers
Answer:
35.0g of ice at 0 degrees
Explanation:
Scientific investigations must be well __________ to be sure the data collected will help answer the scientist's question
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Answer:
The answer is relevant.
Scientific investigations must be well relevant to be sure the data collected will help answer the scientist's question.
What is a scientific investigation?A scientific investigation is an investigation that is done in the field of science. This unravels the secrets of the earth and the logical reason behind the things happening.
There are three types of scientific investigations. They are descriptive investigation, comparative investigation, and experimental investigation. When we see a thing happening in the environment or anywhere, always find a reason behind it.
The steps in completing a scientific investigation are:
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Bronsted Lowry reactions can use hydroxide ions.
True
False
Answers
Answer:
f
Explanation:
True or false? To prepare 20.0 mL of 2.00 M solution of hydrochloric acid from a 10.0 M stock solution, you should take 4.00 mL of the stock solution and add 20.0 mL of water.
Answers
False. To prepare 20.0 mL of 2.00 M solution of hydrochloric acid from 10.0 M stock solution, 4.0 mL of the stock solution and 16.0 mL of water would be needed.
Recall the law of diffusion that:
C1V1 = C2V2, where C1 = initial concentration, V1 = initial volume, C2 = final concentration, and V2 = final volume.
In this case, if C1 =10.0 M, V1 = ?, C2 = 2.00 M and V2 = 20.0 mL
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helllllppppppp pleaseeeeeee
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PLEASE HELP ME!!!
A 38.8g piece of metal alloy absorbs 181J as its temperature increases from 25.0°C to 36.0°C°. What is the alloy's specific heat? Show your work.
Answers
0.424 J/g °C
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightEquality Properties
Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtraction Property of EqualityChemistry
Thermochemistry
Specific Heat Formula: q = mcΔT
q is heat (in Joules)m is mass (in grams)c is specific heat (in J/g °C)ΔT is change in temperatureExplanation:Step 1: Define
[Given] m = 38.8 g
[Given] q = 181 J
[Given] ΔT = 36.0 °C - 25.0 °C = 11.0 °C
[Solve] c
Step 2: Solve for Specific Heat
Substitute in variables [Specific Heat Formula]: 181 J = (38.8 g)c(11.0 °C)Multiply: 181 J = (426.8 g °C)c[Division Property of Equality] Isolate c: 0.424086 J/g °C = cRewrite: c = 0.424086 J/g °CStep 3: Check
Follow sig fig rules and round. We are given 3 sig figs.
0.424086 J/g °C ≈ 0.424 J/g °C
help, please ( rando words )
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Answer:
ionic
Explanation:
Answer:
the answer is ionic
Explanation:
hope this helps!
please can i also have brainliest too?
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Answer:
cellular respiration is needed for our cells to get energy from our food.
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Answers
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P1 * V1 = P2 * V2
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Answer:
because it is
Explanation:
simple
Answer:
Explanation: none