2900 g Au
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableMolesStoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 14.7 mol Au
[Solve] g Au
Step 2: Identify Conversion
[PT] Molar Mass of Au - 196.97 g/mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 14.7 \ mol \ Au(\frac{196.97 \ g \ Au}{1 \ mol \ Au})[/tex][DA] Multiply [Cancel out units]: [tex]\displaystyle 2895.46 \ g \ Au[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
2895.46 g Au ≈ 2900 g Au
Determine whether each of the following salts will form a solution that is acidic, basic, or pH-neutral.
a. KCl
b. NaClO
c. Al(ClO4)3
d. NH4Cl
e. C5H5NHF
f. NaBr
g. Ca(NO2)2
Answer:
a) Neutral
b) Basic
c) Acidic
d) Acidic
e) Basic
f) Neutral
g)
Explanation:
a) KCl is a neutral salt because K ion in solution form produces both acid and base (KOH)
b) NaClO produces basic solution because ClO− is the conjugate base of a weak acid
c) Al(ClO4)3 will produce acidic solution because ClO4 is component of strong acid
d) NH4Cl will produce acidic solution because NH4+ ion is a strong conjugate acid of the weak base and Cl- is a weak conjugate base of the strong acid
e) Basic
f) Neutral salt
g) Acidic
How many oxygen atoms are there in 979 g Ba3(AsO4)2?
Answer:
2
Explanation:
75.0 g of ammonium sulfate
A balloon is floating around outside your window. The temperature outside is -1 °C, and the air pressure is 0.800 atm. Your neighbor, who released the
balloon, tells you that he filled it with 5.00 moles of gas. What is the volume of gas inside this balloon?
Express your answer to three significant figures and include the appropriate units.
View Available Hint(s)
HA
?
Vballoon
Value
Units
Submit
Part B
A 14.0 L gas cylinder is filled with 5.00 moles of gas. The tank is stored at 7 °C. What is the pressure in the tank?
Express your answer to three significant figures and include the appropriate units.
View Available Hint(s)
Answer:
140 L (3 sig-figs; includes the zero)*
Explanation:
PV = nRT => V = nRT/P
P = 0.800atm
V = ?
n = 5 moles
R =0.08206 L·atm/mol·K
T = -1°C = (-1 + 273)K = 272K
V = nRT/P = (5mol)(0.08206 L·atm/mol·K)(272K)/(0.800atm) = 139.5 L
*=> 140 Liters (3 sig-figs) => zero is a sig-fig b/c it was result of rounding 139.5 Liters to obtain 140 Liters.
MOLECULES SPEED UP WHEN ENERGY IS CREATED AND SLOW DOWN WHEN ENERGY IS DESTROYED true or false
2. The boat sailing on the sea slows down. What kind of friction is acting on it?
a.static friction
b. fluid friction
c. rolling friction
d.sliding friction
help me pls
Answer:
Dry friction. Dry friction resists relative lateral motion of two solid surfaces in contact. The two regimes of dry friction are 'static friction' ("stiction") between non-moving surfaces, and kinetic friction (sometimes called sliding friction or dynamic friction) between moving surfaces.
I NEED HELP ASAP PLEASE GIVING BRAINLIEST!
Answer: Frequency
Explanation: Without a doubt my answer is Frequency, none of the other options have nothing to do with sound waves so Frequency is my best bet.
HELP I HAVE NO TIME LEFT
Answer:
Top question is B
Bottom question is A
Explanation:
Answer:
top answer : B. intrusive igneous rock
bottom answer : A. extrusive igneous rock
Hope this helps!
Please rate my anser and say thanks!
What is distillation
Answer:
Definition:
1. The action of purifying a liquid by a process of heating and cooling.
2. The extraction of the essential meaning or most important aspects of something.
Explanation:
Answer:
the action of purifying a liquid by a process of heating and a process of cooling.
Explanation:
look at the answer.
NEED HELP ASAP FREE BRAINLIST
Answer:
7) C. Sodium
8) G. 1 valence electron
Explanation:
Calculate the mass, in grams, of 992 atoms of cesium, Cs (1 mol of
Cs has a mass of 132.91 g).
Answer:
[tex]2.19x10^{-19}gCs[/tex]
Explanation:
Hello there!
In this case, it is possible to know that the amount of atoms of cesium are related to moles by means of the Avogadro's number, for that reason we first compute the moles in 992 atoms of this element:
[tex]992atomsCs*\frac{1molCs}{6.022x10^{23}atomsCs}=1.65x10^{-21}molCs[/tex]
Next, given its molar mass, we can compute the mass:
[tex]1.65x10^{-21}molCs*\frac{132.91gCs}{1molCs}\\\\2.19x10^{-19}gCs[/tex]
Best regards!
Observe this chemical reaction:
4 Fe + 302- 2Fe 203
How many atoms of oxygen are in this !
Answer:
There are 6 atoms of oxygen
Explanation:
The total oxygen used here is represented as molecule. One molecule of oxygen as two atoms.
In this chemical equation, total three oxygen molecule reacts with the iron.
Hence, total number of atoms in 3 molecules of oxygen with two oxygen per molecule = [tex]3 * 2 = 6[/tex]
There are 6 atoms of oxygen
If 8.82 grams of Aluminum reacts, how many grams of AlCl3 will be produced?
Hey there! :
Molar mass:
Al = 26.9815 g/mol
AlCl₃ = 133.3405 g/mol
Reaction stochemistry ,calculates the mass of AlCl3 produced
2 Al + 3 Cl₂ = 2 AlCl₃
2 * 26.9815 g Al --------------------- 2 * 133.3405 g AlCl₃
8.82 g Al ------------------------------- ( mass of AlC₃ )
mass of AlCl₃ = ( 8.82 * 2 * 133.3405 ) / ( 2 * 26.9815 )
mass of AlCl₃ = 2352.12642 / 53.963
mass of AlCl₃ = 43.58 g of AlCl₃
Hope this helps!
An aqueous solution is produced by dissolving 1.5 g of barium hydroxide (Ba(OH)2(aq) in enough water
to make 0.250 L.
a) write the dissociation reaction of barium hydroxide
b) calculate the molar concentration of OH(aq)
13
c) calculate pH
Answer:
A. Ba(OH)₂ (aq) <==> Ba²⁺ (aq) + 2OH¯ (aq)
B. The molar concentration of OH¯ is 0.072 M
C. The pH of the solution is 12.86
Explanation:
A. Dissociation equation
Barium hydroxide Ba(OH)₂ dissolves in water by the following equation:
Ba(OH)₂ (aq) <==> Ba²⁺ (aq) + 2OH¯ (aq)
B. Determination of the molar concentration of OH¯.
We'll begin by calculating the number of mole in 1.5 g of Ba(OH)₂. This can be obtained as follow:
Mass of Ba(OH)₂ = 1.5 g
Molar mass of Ba(OH)₂ = 137 + 2(16 + 1)
= 137 + 2(17)
= 137 + 34
= 171 g/mol
Mole of Ba(OH)₂ =?
Mole = mass / Molar mass
Mole of Ba(OH)₂ = 1.5 / 171
Mole of Ba(OH)₂ = 0.009 mole
Next, we shall determine the molarity of Ba(OH)₂. This can be obtained as follow:
Mole of Ba(OH)₂ = 0.009 mole
Volume of solution = 0.250 L
Molarity of Ba(OH)₂ =?
Molarity = mole / Volume
Molarity of Ba(OH)₂ = 0.009 / 0.250
Molarity of Ba(OH)₂ = 0.036 M
Finally, we shall determine the molar concentration of OH¯.this can be obtained as follow:
Ba(OH)₂ (aq) <==> Ba²⁺ (aq) + 2OH¯ (aq)
From the balanced equation above,
1 mole of Ba(OH)₂ produced 2 moles OH¯.
Therefore, 0.036 M Ba(OH)₂ will produce = 0.036 × 2 = 0.072 M OH¯.
Therefore, the molar concentration of OH¯ is 0.072 M
C. Determination of the pH.
We'll begin by calculating the pOH of the solution. This can be obtained as follow:
Concentration of OH¯, [OH¯] = 0.072 M
pOH =?
pOH = –Log [OH¯]
pOH = –Log 0.072
pOH = 1.14
Finally, we shall determine the pH. This can be obtained as follow:
pOH = 1.14
pH =?
pH + pOH = 14
pH + 1.14 = 14
Collect like terms
pH = 14 – 1.14
pH = 12.86
What is 17647.05882 rounded to 2 significant figures?
Which of the following statements best explains why the atomic radius increases from top to bottom of the periodic table? A. The electronegativity decreases from top to bottom of the periodic table, so the atoms near the bottom have an increased capacity for electrons. B. For the atoms lower in the periodic table, there is more difference in charge between the electrons and the protons, which allows electrons to orbit farther from nucleus. C. The ionization energy decreases from top to bottom of the periodic table, so the atoms near the bottom have an increased capacity for electrons. D. For the atoms lower in the periodic table, the valence electrons are in higher energy levels and farther from the nucleus.
Answer:
D. For the atoms lower in the periodic table, the valence electrons are in higher energy levels and farther from the nucleus.
Explanation:
Atomic radius increases down the group because down the group, there an increase in the number of principle energy levels occupied. Now, these higher principal energy levels are made up of orbitals that are larger than the orbitals from the lower energy levels in size.
Therefore, the effect of this is that the greater number of principal energy levels will outweigh the increase in nuclear charge since nuclear charge also increases down the group and this in turn makes the atomic radius to increase as we go down the group.
Answer: C. For the atoms lower in the periodic table, the balance electrons are in higher energy levels and farther from the nucleus.
Explanation: As the valance electrons orbit farther from the nucleus the energy level increases from the top to the bottom of the periodic table. So the atoms lower in the periodic table, the balance electrons are in higher energy levels and farther from the nucleus, which result in an increase in the atomic radius.
Which describes how atoms form molecules.An atom is to a molecule as
A. A letter is to a word
B. A cat is to a mouse
C. A spoon is to the soup
D. A book is to a page
Which type of material incorporates a variety of substances to enhance desired properties such as strength and flexibility?
Answer:
its a polymer
Explanation:
PLEASE HELP :(
What most likely accounts for the difference between curve A and curve B on
the energy diagram?
A. The reaction described by curve B is under greater pressure.
B. The reaction described by curve B is at a different temperature.
C. The reaction described by curve B has higher reactant
concentrations.
D. The reaction described by curve B is occurring with a catalyst.
Answer:
D. The reaction described by curve B is occurring with a catalyst.
Explanation:
The peak in the curve is the activation energy. According to this graph, the activation energy was lowered. A catalyst is what you can use to lower the activation energy.
The most likely accounts for the difference between curve A and curve B on the energy diagram is the reaction described by curve B is occurring with a catalyst, therefore option (d) is correct.
What do you mean by the catalyst in a reaction ?A catalyst is a chemical substance which alters the rate of a reaction without itself undergoing any permanent chemical change.
A catalyst does not initiate a chemical reaction. A catalyst does not be consumed in the reaction.
Catalysts tend to react with reactants to form intermediates and at the same time facilitate the production of the final reaction product. After the whole process, a catalyst can regenerate.
Catalysts encourage molecules to react and make the whole reaction process easier and efficient.
The most likely accounts for the difference between curve A and curve B on the energy diagram is the reaction described by curve B is occurring with a catalyst, ,hence option (d) is correct.
Learn more about catalyst ,here:
https://brainly.com/question/1565029
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Calculate the morality of a 35.4% (by mass) aqueous solution of phosphoric acid (H3PO4). Molar mass of H3PO4 is 98.00g/mol
Answer:
no idea with the answer pls check with otherr
A chemist needs to determine the concentration of a sulfuric acid solution by titration with a standard sodium hydroxide solution. He has a 0.1071 M standard sodium hydroxide solution. He takes a 25.00 mL sample of the original acid solution and dilutes it to 250.0 mL. Then, he takes a 10.00 mL sample of the dilute acid solution and titrates it with the standard solution. The endpoint was reached after the addition of 12.69 mL of the standard solution. What is the concentration of the original sulfuric acid solution?
Answer:
The way the chemist works is through the chemistry of astronomical events in the atmosphere of delocalisation which causes a significant impact on Kanye West which ellaborates the terrific police of the UK. And thats why me and Jennifer Lopez share the same hair band.
Which of the following represents the atomic number of an element?
Answer:
The atomic number is the number of protons in the nucleus
when ammonium nitrate is found at a fire scene, it may undergo thermal decomposition producing which materials?
Answer:
nitrous oxide
Explanation:
does Al3+ gain or loose electrons?
Answer:
gain
Explanation:
The octet rule states that atoms tend to gain, lose, or share electrons in order to acquire a full
set of valence electrons. Which type of model could be used to demonstrate this process?
Explanation:
The octet rule states that atoms tend to form compounds in ways that give them eight valence electrons and thus the electron configuration of a noble gas. ... Atoms of nonmetals tend to gain electrons in order to fill their outermost principal energy level with an octet.
Which equation represents a redox reaction?
A. HCI + LiOH
-
LiCl + H20
B. AgNO3 + LICI
AgCl + LINO3
C. HNO3 + KOH - KCl + H20
D. 2NaBr + Cl2
-
2NaCl + Br2
SUBI
Answer:
D. [tex]2NaBr + Cl_2\rightarrow 2NaCl + Br_2[/tex]
Explanation:
Hello!
In this case, for the given set of chemical reactions, it is possible to infer that D. is a categorized as redox due to the following:
Since both chlorine and bromine remain as diatomic gases, their oxidation states in such a form is 0, but as anions with lithium cations they have a charge of - according to the following reaction and half-reactions:
[tex]2NaBr + Cl_2\rightarrow 2NaCl + Br_2[/tex]
[tex]Cl_2^0+2e^-\rightarrow 2Cl ^-\\\\2Br^- \rightarrow Br_2^0+2e^-[/tex]
Unlike the other reactions whereas no change in the oxidation states is evidenced.
Answer:
D. 2NaBr + Cl2
what is the bromothymol blue of lemon?
[tex]\mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}[/tex]
Actually Welcome to the Concept of the Litmus paper and pH indications.
Since the Litmus paper and Artificial indicators are used to check the pH of any solution.
=> If a substance is Acidic, its pH range is less than 7 , and the colour are generally red, yellow, orange and hot shades.
=> If a substance is Basic, it's pH range is more than 7 , and the colors are generally Cool shades like, blue, violet, green, etc.
==> In the lemon juice experiment, the pH paper turns from blue to vivid red, indicating the presence of H3O+ ions: lemon juice is acidic. Refer to the table of Universal Indicator Color change for clarification.
how are atoms an example of unity?
A. All atoms have the same arrangement of electrons.
B. All atoms react with other atoms the same way.
C. All atoms of one kind share common properties.
D. All atoms have the same number of neutrons.
Answer: C. All atoms of one kind share common properties.
Explanation:
Some birds migrate 20,000 miles. If 1 mile is 1.6 kilometers, calculate the distance these birds fly in kilometers.
Answer:
32000 kilometers
Explanation:
In order to convert from miles to kilometers, we need to use a conversion factor. In other words, we put miles in the denominator and kilometers in the numerator, as follows:
20000 miles * [tex]\frac{1.6km}{1mile}[/tex] = 32000 kilometersThat way the units for miles cancel each other, leaving the equivalent amount in kilometers.
Photosynthesis cannot happen without:
O light
O chlorophyll
O carbon dioxide
O all of the above
O none of the above
All of the above — plants need light, chlorophyll, and carbon dioxide to perform photosynthesis, a chemical reaction producing glucose (which provides energy for the plant.)
Which of the following is an empirical formula? a) H2O2 b) H2O c) C2H2 d) C4H8
Answer:
The correct answer is h20
Explanation:
i got it right on an exam.