Answer:
1.44 g
Explanation:
We can solve this problem if we keep in mind the law of conservation of mass, which states that if 4 grams of a compound reacted completely, then the sum of the products has to be 4 grams as well.
(Reactants) 4 g = 2.56 g + x g (Products)We solve for x:
x= 4 - 2.56 = 1.44So the answer is 1.44 g.
Which behavior is an example of how animals defend their territory?
O A. Rhinoceros males urinate to mark the area where they live.
OB. Several dolphins swim around a school of fish and take turns feeding.
OC. Hyenas and lions compete for prey. O D. A bee shares the location of food with other bees.
Answer: A
Explanation: because It shows how they mark there territory by unreining
Answer: O A. Rhinoceros males urinate to mark the area where they live.
Explanation:
O B. Is an example of animals working to together.
O C. This is competition rather than defending territory.
O D. Again an example of animals working together.
Make sure to study, as the text provided for A. P. E. X is extremely helpful! Don’t stress, make sure to stay hydrated, have self care, and remember self care isn’t just proper hygiene make sure you take care of your well being while making sure you’re mindful that you are just a person, have a good day! I love ya’ll and I’m proud of ya!
To clarify the answer is correct as I have the same Test (CST): Response to Stimuli:
NEED HELP WIT 6th grade science homework PLZ HELP
Answer:
the answer is it results in a change of temperature in both objects
!!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).
Finish this formula: Speed = _______ divided by time
Answer:
Distance
Explanation:
Speed= Distance/ Time
Answer:
Distance would be the answer! :)
Identify the group of elements with the same outermost energy level
a)H, He
b)N, P, As, Bi
c)Rb, Sr, Y, Zr
d)B, Si, As, Te, At
Answer:
A
Explanation:
b) N, P, As, Bi
Elements in the same group all have the same number of valence electrons and therefore similar chemical properties. Valence electrons help in predicting chemical reactions.So all the atoms of a given element have the same energy levels because they have the same numbers of electrons and protons.N, P, As, Bi for this group of elements, all these elements belongs to same group i.e. group 15. Group 15 has total 5 valence electrons.Electronic configuration = ns²np³All these elements will have same outermost energy level.Learn more:
brainly.com/question/371590
For the balanced equation shown below, if the reaction of 77.0 grams of CaCN2 produces 26.1 grams of NH3, what is the percent yield?
CaCN2+3H2O=>CaCO3+2NH3
%yield = 86.93%
Further explanationGiven
Reaction
CaCN₂+3H₂O=>CaCO₃+2NH₃
Required
The percent yield
Solution
mol CaCN₂(MW= 92 g/mol) :
= mass : MW
= 77 g : 92 g/mol
= 0.834
From equation, mol NH₃ :
= 2/1 x mol CaCN₂
= 2/1 x 0.834
= 1.668
Mass NH₃(theoretical):
= 1.668 mol x 18 g/mol
= 30.024 g
% yield = (actual/theoretical) x 100%
%yield = (26.1/30.024) x 100%
%yield = 86.93%
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
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
Write down a question about yeast fermentation that can be answered through scientific investigation.
Explanation:
Alcoholic fermentation converts one mole of glucose into two moles of ethanol and two moles of carbon dioxide, producing two moles of ATP in the process. The overall chemical formula for alcoholic fermentation is: C6H12O6 → 2 C2H5OH + 2CO
Answer:
1. If you leave yeast fermentation out for 3 days what happens?
2. If you put yeast fermentation out in the sun will it still work?
Explanation:
These can be answered through scientific investigation.
:)))))))
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.
[tex]\huge\star{\underline{\mathtt{\red{A}\pink{N}\green{S}\blue{W}\purple{E}\orange{R}}}}\star[/tex]
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 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.
Which is more dense:
(b)Oxygen or air?
Answer:
I think air is more denser than oxygen
What amount of ice must be added to 250 g of water at 15°c to cool the water to 0°c and have no ice left
Answer:
[tex]\mathbf{m= 47 \ g}[/tex]
Explanation:
The heat needed to melt ice [tex](q_1)[/tex] + heat needed to cool water [tex](q_2)[/tex] = 0
[tex]m\Delta H_{fusion} + mc \Delta T = 0[/tex]
[tex]m \times 333.55 J g^{-1} + 250 \ g \times 4.184 \ Jg^{-1 \ 0 } \times (-15.0 \ ^0 C) = 0[/tex]
[tex]m \times 333.55 J g^{-1} =15690[/tex]
[tex]m=\dfrac{15690 \ J }{333.55 J g^{-1} }[/tex]
[tex]\mathbf{m= 47 \ g}[/tex]
this is simple, I just want to check my answer for this
What is the correct FORMULA for Aluminum borate?
Answer:
I think it's K2Al2B2O7
Aluminum Borate or Aluminum Boron Oxide is AlBO₃
on reaction:
BO₃⁻³ + Al⁺³ ==> AlBO₃
Calculate the mass of 3 moles of CCI4
Answer:
So one mole of ccl4 contains 152 grams. it implies that 3 moles of ccl4 contains 152 * 3 grams. it is equal to 456. grams.
Explanation:
Hope this helps
The temperature of a substance is a measure of the
1.
average kinetic energy of its particles
2.
average potential energy of its particles
3.
ionization energy of its particles
4.
activation energy of its particles
Answer:
1. average kinetic energy of its particles
Explanation:
The temperature of a substance is a measure of the average kinetic energy of its particles.
The average kinetic energy of the particles of a substance is directly proportional to its temperature. This is one of the premise of the kinetic theory of gases.
When thermal energy is supplied to a substance, the molecules gains kinetic energy. As the kinetic energy increases so also the temperature of the substance. So, we see that kinetic energy and temperature are connected through the thermal energy acquired by the substance.Molecules are formed from ?
a magnet has a north and south pole labeled in the drawing student A thinks that if you cut a magnet in half each ew parts will separate into either the north or the south poles is the student correct
Answer:
The student is Incorrect
Explanation:
Even if you break a magnet the poles still remains same. There is no
difference in the magnet Both north and south pole will be there even if you
cut it in to small pieces when you cut it into pieces, if suppose you break 2
magnets and put north and north together it will repel whereas if there are
different poles like north and south it will attract, so even if you break one
single magnet the different poles will attract, Hence the student is incorrect.
Please mark me as brainliest
Thank you :)what type of wave is shown ?
wood is A)element B)compound C)mixture
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:
1. 32.5grams of NaOH (sodium hydroxide) reacts an excess of CO2 (carbon dioxide).
2NaOH(s) + CO2(g) → Na2CO3(s) + H2O(1)
a.
What is the theoretical yield of Na2CO3 in grams? Answer: 43.1g Na2CO3
b.
If 16.45 g of Na2CO3 is formed, what is the percent yield? Answer: 38.2%
a. 43.1 g
b. 38.2%
Further explanationGiven
32.5 grams of NaOH
Required
The theoretical yield of Na₂CO₃
The percent yield
Solution
Reaction
2NaOH(s) + CO₂(g) → Na₂CO₃(s) + H₂O(l)
mol NaOH :
= mass : MW
= 32.5 : 40 g/mol
= 0.8125
mol Na₂CO₃ from the equation :
= 1/2 x mol NaOH
= 1/2 x 0.8125
= 0.40625
a.
Mass Na₂CO₃ :
= mol x MW Na₂CO₃
= 0.40625 x 106 g/mol
= 43.0625≈43.1 g
b. % yield = (actual/theoretical) x 100%
%yield = 16.45/43.1 x 1005
%yield = 38.17%≈38.2%
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
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
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.
15. On some occassions, more than half of the moon is dark.
O
a. True
O b. False
i need help but the answer choice is (A. protists) (B.lichens) C. flagellates) (D.yeast )
Answer:
A
Explanation:
please mark me as brainlist and follów me too
Answer:
The Lichen Symbiosis
Lichens are made up of two or more closely interacting organisms, a fungus, and one or more partners, called photobionts. The photobiont may be an alga and/or cyanobacteria, both of which can produce simple sugars by photosynthesis.
Explanation:
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.
why did modern's say atoms are divisible
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
