The Answer is Lead tetrachloride, PbCl4 is the molecular formula for lead tetrachloride, also known as lead(IV) chloride. It is a yellow, oily liquid that is stable below 0 degrees Celsius and decomposes at 50 degrees Celsius.
It is tetrahedral in structure, with lead as the central atom. The covalent bond length of Pb-Cl is 247 pm, and the bond energy is 243 kJmol. Lead tetrachloride can be synthesised by reacting lead(II) chloride PbCl2 with hydrochloric acid HCl in the presence of chlorine gas (Cl2), yielding chloroplumbic acid H2PbCl6. By adding ammonium chloride, it is converted to the ammonium salt (NH4)2PbCl6 (NH4Cl). Finally, concentrated sulfuric acid H2SO4 is added to the solution to separate out the lead tetrachloride.
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how many moles of sodium phosphate are required to make 7.5 moles of sodium nitrate in 2Na3PO4+3Be(NO3)=6NanO3+Be3(PO4)2
Answer:
2.5 moles of sodium phosphate
Explanation:
3 Pb(NO3)2 + 2 Na3PO4 → Pb3(PO4)2 + 6 NaNO3
6 (moles in the reaction)- 7.5(moles in the task)
2 (moles in the reaction)- x (moles in answer) ⇒6x = 2*7.5 ⇒ x = 15/6=2.5 (moles)
Graduated cylinder‘s
PLEASE Answer asap! Which has the largest atomic radius?
A. Lithium
B. Helium
C. Oganesson
D. Francium?
Answer:
It's D. Francium
Explanation:
Atomic radii vary in a predictable way across the periodic table. The atomic radius increases from top to bottom in a group and decreases from left to right across a period. Thus, Helium is the smallest element, and Francium is the largest.
A solution has a hydroxide-ion concentration of 1.5 x 10^-5M. (a) What is the concentration of the hydronium ions in this solution? (b) What is the pH of this solution? (c) Is the solution acidic, basic, or neutral?
What causes competition?
Explanation:
Competition stems from the fact that resources are limited. There are simply not enough of some resources for all individuals to have equal access and supply. Competition can occur between organisms of the same species, or between members of different species.
The gas phase decomposition of phosphine at 120 °C
PH3(g)1/4 P4(g) + 3/2 H2(g)
is first order in PH3 with a rate constant of 1.80×10-2 s-1.
If the initial concentration of PH3 is 8.48×10-2 M, the concentration of PH3 will be 2.45×10-2 M after
s have passed.
Answer:
The decreasing in concentration occurs after 69.0s
Explanation:
A first order reaction follows the equation:
Ln [A] = -kt + ln[A]₀
Where [A] is the concentration of the reactant after time t
k is rate constant of the reaction
And [A]₀ is the initial concentration of the reactant
Replacing:
Ln 2.45x10⁻²M = -1.80x10⁻²s⁻¹*t + ln8.48x10⁻²
-3.709 = -1.80x10⁻²s⁻¹*t -2.467
-1.2416 = -1.80x10⁻²s⁻¹*t
69.0s = t
The decreasing in concentration occurs after 69.0s
How many formula units are there in 1.34 moles of Lithium Bromide (LiBr)? (write your answer in scientific notation).
Answer:
8.07×10²³ units
Explanation:
6.02×10²³×1.34
8.07×10²³ units
What kind of rock can be broken
down to make sand?
Answer:
sandstone
Explanation:
Sandstone is a mineral rock made of small particles.
Incorporate the meaning distance and displacement in the poem tagalog or English not necessarily the exact definition halimbawa: Itong mga dayuhan bago nakarating sa ating Bayan ay naglakbay ng ilang milya mula kanluran papuntang timog silangan
Answer:
Displacement.
Explanation:
The example i.e. these foreigners before arriving in our Town traveled several miles from west to southeast represents displacement not distance because in this example direction of the objects are given. We know that distance is a scalar quantity which is expressed from its magnitude only while on the other hand, displacement is a vector quantity which can be fully explained through magnitude as well as direction of the object. in this example, west to southeast represents direction of the objects so we can say that it refers to the displacement.
3) What is the mass of 1 mole of selenium (Se)?
Answer:
78.96 grams
Explanation:
I looked it up and that's what I found
hope it helps
Answer:
78.96 g mol
Explanation:
78.96 g mol
in the period table the mass of Se is 78.96 g mol
I have a bowling ball hanging from a chain in my room. What two forces are acting on the bowling
ball?
Answer:
Gravity and the chain is holding it up not sure what it is called. Also if you want free points go to my answers and look for a friday nigt funkin rp answer but anwer if you want to rp and if you know what it is
Explanation:
Answer:
Kinetic & Potential Energy
Explanation:
Kinetic Energy: Energy which a body possesses by virtue of being in motion.
Potential Energy: The energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors
Hope this helps! Have a good day/or night!
P.S: Sorry if I'm wrong I tried my best. Best wishes!!!
How many grams are there in 2.30x10^24 atoms of silver?
Answer:
107.8682 grams.
Explanation:
PLEASE HELP AND DONT YOU DARE GIVE ME THE LINK
The fact that animals are the only kingdom that has muscle tissue demonstrates a contrast between which of the
following?
animals and humans
animals and protozoans
animals and other living things
animals and insects
Answer:
animals and other living things
Explanation:
All living organisms have been classified and grouped into a hierarchical system of classification. Kingdom is the highest level in this system comprising of 6 other levels. However, there are different kingdoms that harbors different organisms. The kingdoms are: animalia, plantae, protista, monera, fungi etc.
However, among other kingdom of organisms, organisms in the Kingdom Animalia are the only ones that possesses muscle tissues etc. This shows a contrast between animals and other living things.
The law of reflection states that the angle of incidence and the angle of reflection are always
Answer:
The law of reflection states that the angle of incidence and the angle of reflection are always equal.
Which of the following shows the correct rearrangement of the the heat equation q = mCpΔT to solve for specific heat?
Answer:
c
Explanation:
Answer:
The Answer is the last one
Explanation:
Si Hecho Dos Cubos de Hielo En Un Vaso Con Agua Señalo Donde Quedo El Nivel Del Agua, Luego A Pasar El Tiempo Dejo Que Se Derritan Los Cubos De Hielo El Nivel Del Agua Aumenta??
Answer:
Ver explicacion
Explanation:
Técnicamente, cuando el hielo se derrite, ocupa aproximadamente el mismo volumen de agua que es igual a la masa de agua desplazada antes de que el hielo se derrita. Esto es posible solo cuando se ignora el cambio en la densidad del agua.
Sin embargo, si tenemos en cuenta el ligero cambio en la densidad del agua, se puede demostrar que el volumen de hielo es mayor que el del agua líquida porque el agua se expande cuando se congela.
Esto significa que el volumen de agua disminuye cuando el hielo se derrite.
In a titration, what is the significance of the endpoint?
Answer:
Explanation:
the addition of an indicator to the analyte solution helps us to visually spot the equivalence point in an acid-base titration. Endpoint: refers to the point at which the indicator changes color in an acid-base titration.
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what is the balanced equation for CuSO4 + 2NaOH → Cu(OH)2 + Na2SO4 I just want the answer please help
What does a positive H look like on a potential energy diagram?
Answer:
D because i did this last week and got it right.
A positive H indicates that the potential energy of products is higher than the potential energy of reactants.
What is a potential energy diagram?A potential energy diagram is a diagram which shows the energy content of reactants and products as well as the energy changes that occur in a reaction.
A positive H in a reaction indicates that the reaction is endothermic and that products have a higher potential energy than reactants.
Therefore, a positive H indicates that tje potential energy of products is higher than the potential energy of reactants.
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Which of the following terms describes the area where the Himalaya Mountains formed?
A.)Convergent Boundary
B.)Transform Boundary
C.)Divergent Boundary
B.)Subduction Zone
Answer:
Convergent Boundary describes the area where himalayan mountains formed.
Help pleaseee.... :(
Answer:
D= .7
C= 1.25
B= 2.2
A= 3.6
Which of the following bonds is classified as a polar bond?
A K-CI
B Br-Br
C Si-F
D S-O
WILL MARK BRAINLIST
Answer:
the answer is b
Explanation:
the answer is b
Compound of KCl has a polar bond as there is a electronegativity difference between potassium and chlorine atoms.
What is a compound?
Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:
1)Molecular compounds where in atoms are joined by covalent bonds.
2) ionic compounds where atoms are joined by ionic bond.
3)Inter-metallic compounds where atoms are held by metallic bonds
4) co-ordination complexes where atoms are held by co-ordinate bonds.
They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.
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A 3.4 g sample of an unknown monoprotic organic acid composed of C,H, and O is burned in air to produce 8.58 grams of carbon dioxide and 1.50 grams of water vapor. It was also determined that 279 mL of 0.1 M KOH was needed to titrate the acid completely.
Answer:
[tex]C_7H_6O_2[/tex]
Explanation:
Hello there!
In this case, we can divide the problem in three stages: (1) determine the empirical formula with the combustion analysis, (2) compute the molar mass of acid via the moles of the acid in the neutralization and (3) determine the molecular formula.
(1) In this case, since 8.58 g of carbon dioxide are released, we can first compute the moles of carbon in the compound:
[tex]n_C=8.58gCO_2*\frac{1molCO_2}{44.01gCO_2}*\frac{1molC}{1molCO_2}=0.195molC[/tex]
And the moles of hydrogen due to the produced 1.50 grams of water:
[tex]n_H=1.50gH_2O*\frac{1molH_2O}{18.02gH_2O}*\frac{2molH}{1molH_2O} =0.166molH[/tex]
Next, to compute the mass and moles of oxygen, we need to use the initial 3.4 g of the acid:
[tex]m_O=3.4g-0.195molC*\frac{12.01gC}{1molC}-0.166molH*\frac{1.01gH}{1molH} =0.89gO\\\\n_O=0.89gO*\frac{1molO}{16.0gO}=0.0556molO[/tex]
Thus, the subscripts in the empirical formula are:
[tex]C=\frac{0.195}{0.0556}=3.5 \\\\H=\frac{0.166}{0.0556}=3\\\\O=\frac{0.0556}{0.0556}=1\\\\C_7H_6O_2[/tex]
As they cannot be fractions.
(2) In this case, since the acid is monoprotic, we can compute the moles by multiplying the concentration and volume of KOH:
[tex]n_{KOH}=0.279L*0.1mol/L\\\\n_{KOH}=0.0279mol[/tex]
Which are equal to the moles of the acid:
[tex]n_{acid}=0.0279mol[/tex]
And the molar mass:
[tex]MM_{acid}=\frac{3.4g}{0.0279mol} =121.86g/mol[/tex]
(3) Finally, since the molar mass of the empirical formula is:
7*12.01 + 6*1.01 + 2*16.00 = 122.13 g/mol
Thus, since the ratio of molar masses is 122.86/122.13 = 1, we infer that the empirical formula equals the molecular one:
[tex]C_7H_6O_2[/tex]
Best regards!
suppose that you measured out 3.50g of Na2SO4. how many moles would you have? (show work)
Answer:
Na2SO4 is equal to 0.0070401642780093 mole.
Explanation:
How many moles are in 2.5 g of N2?
0.089 moles
0.18 moles
1.3 moles
O
11 moles
Answer:
0.089 moles
Explanation:
Answer:
a
Explanation:
jesus loves you!
A student weighs an empty flask and stopper and finds the mass to be 53.256 g. She then adds about 5 mL of an unknown liquid and heats the flask in a boiling water bath at 98.8°C. After all the liquid is vaporized, she removes the flask from the bath, stoppers it, and lets it cool. After it is cool, she momen- tarily removes the stopper, then replaces it and weighs the flask and condensed vapor, obtaining a mass of 53.780 g. The volume of the flask is known to be 231.1 mL. The absolute atmospheric pressure in the laboratory that day is 728 mm Hg. a. What was the pressure of the vapor in the flask in atm?
Answer:
a. The pressure in the flask open to the atmosphere during the vaporization of the unknown liquid is equal to the prevailing atmospheric pressure equivalent to 0.957734 atm
Explanation:
The mass of the empty flask and stopper, m = 53.256 g
The volume of the unknown liquid she adds = 5 mL
The temperature of the water in which she heats up the flask = 98.8 °C = 371.95 K
The mass of the flask and the condensed vapor = 53.780 g
The volume of the flask, V = 231.1 mL
The atmospheric pressure, P = 728 mm Hg
a. We note that the student stoppers the flask after all the liquid has evaporated. Therefore, given that the flask was open to the atmospheric pressure as the liquid evaporates, the pressure of the vapor in the flask is equal to the prevailing atmospheric pressure, or 728 mmHg
Using a calculator, 728 mm Hg is equivalent to 0.957734 atm.
The theoretical yield of ammonia in a reaction is 865 g. What is the percent
yield if 657 g is produced?
A- 38.0%
B- 132%
C- 152%
D- 76%
Answer:
657/865= 75.9
D. 76%
Consider the equation and check all statements that apply to it: HA ↔ H+ + A−
(Select Apply Question)
A. It represents a strong acid buffer system.
B. It represents a weak acid buffer system.
C. Adding a strong acid would shift the equilibrium to the left
D. Adding a strong acid would shift the equilibrium to the right
Answer:
The answer is B & C
Explanation:
Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemical
equation:
(( H20-( H2+( 02
Answer:
[tex]2H_2O\rightarrow 2H_2+O_2[/tex]
Explanation:
Hello there!
In this case, for the reaction by which water is decomposed to molecular hydrogen and oxygen:
[tex]H_2O\rightarrow H_2+O_2[/tex]
It is necessary to perform the inspection balance process since there is a dissimilar number of atoms of oxygen on both sides; therefore, by putting a 2 on water we balance oxygen:
[tex]2H_2O\rightarrow H_2+O_2[/tex]
But now, there are four hydrogens on the left; therefore, we put a 2 on hydrogen to finally balance it:
[tex]2H_2O\rightarrow 2H_2+O_2[/tex]
And obviously, the coefficient in oxygen is an unwritten 1.
Best regards!
Which of the following uses electrical energy?
A washing machine
The sun
A plant
A cat
Answer:
★ B. A washing machine.
Explanation:
What's Electrical energy?
Electrical energy is energy derived from electric potential energy or kinetic energy. When used loosely, electrical energy refers to energy that has been converted from electric potential energy.