Answer:
it is because all energy are bound to use up according to the law of conversion of energy
what is the composition and structure of ionic compounds
Answer:
Sodium and chlorine ions come together to form sodium chloride or NaCl. The sodium atom in this compound loses an electron to become Na+, while the chlorine atom gains an electron to become Cl-. Together, they form a neutral compound because the ions balance each other out.
Explanation:
For the following reaction, 5.78 grams of chlorine gas are mixed with excess iron. The reaction yields 6.79 grams of iron(III) chloride.
2Fe (s) + 3Cl2 (g) → 2FeCl3 (s)
a. What is the theoretical yield of iron(III) chloride?
b. What is the percent yield for this reaction?
Answer:
a. Theoretical yield = 8.81 g
b. 77 %
Explanation:
We begin from the reaction:
2Fe (s) + 3Cl₂ (g) → 2FeCl₃ (s)
and the excess is the iron, so the limiting reagent is the chlorine.
We convert mass to moles → 5.78 g / 70.90 g/mol = 0.0815 mol
Ratio is 3:2 so we think this:
From 3 moles of chlorine, I can produce 2 moles of Iron (III) chloride
Then 0.0815 moles would produce (0.0815 . 2) /3 = 0.0543 moles
This is the theoretical yield. We convert the moles to mass:
0.0543 mol . 162.2 g /mol = 8.81 g
If the reaction yields 6.79 g of FeCl₃ and the theoretical yield is 8.81 g ,we can obtain the percent yield: (6.79 / 8.81) . 100 = 77 %
A gas mixture contains each of the following gases at the indicated partial pressures: N2, 211 torr ; O2, 135 torr ; and He, 158 torr . What is the total pressure of the mixture
Answer:
[tex]P_T=504torr[/tex]
Explanation:
Hello!
In this case, since the Dalton's law states that the total pressure inside a container full of various gases is equal to the addition of the pressure of each gas, for the given mixture containing nitrogen, oxygen and helium we have:
[tex]P_T=P_{N_2}+P_{O_2}+P_{He}[/tex]
Thus, by plugging in each partial pressure, we obtain the total pressure of the mixture as shown below:
[tex]P_T=211torr+135torr+158torr\\\\P_T=504torr[/tex]
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I NEED THIS RIGHT NOW OR I GET AN F!!!!! HELP!!!!!
What types of geological events can the following interactions produce?
Divergent boundaries:
Convergent boundaries:
Transform boundaries:
Answer: Divergent boundaries -- where new crust is generated as the plates pull away from each other. Convergent boundaries -- where crust is destroyed as one plate dives under another. Transform boundaries -- where crust is neither produced nor destroyed as the plates slide horizontally past each other.
Explanation:
earthquakes volcanos n stuff like that
What is the “nature” of the water cycle?
Answer:
Continuously recurring, or cycling maybe?
Answer:
a process that recirculates earth's water through the stages of evaporation condensation and collection. The water from lakes, oceans, rivers and other water bodies began to evaporate vapor from the water bodies, condensates and the clouds later causing precipitation
Which body of water will have a greater influence on an area?
A. river
B. lake
C. stream
D. ocean
Answer:
The correct option is A
Explanation:
Water from a river is used for many activities in a community. These activities could include (but not limited to) tourism, drinking for animals, local transport, irrigation for nearby farming, recreation (as in swimming), habitat for some living organisms among others. Rivers are not limited by what limits the influence of oceans such as taste (it's saltiness, which cannot be used in farming also) and wave current.
Marigold, Inc. uses activity-based costing as the basis for information to set prices for its six lines of seasonal coats.
Activity Cost Pools Estimated Overhead Estimated Use of Cost Drivers per Activity
Designing $445,200 10,600 designer hours
Sizing and cutting 4,081,200 152,000 machine hours
Stitching and trimming 1,491,000 84,000 labor hours
Wrapping and packing 346,500 33,000 finished units
Compute the activity-based overhead rates using the following budgeted data for each of the activity cost pools.
Designing
Sizing and cutting
Stitching and trimming
Wrapping and packing
Answer:
Designing= $42 per designer hour
Sizing and cutting= $26.85 per machine hour
Stitching and trimming= $17.75 per labor hour
Wrapping and packing= $10.5 finished unit
Explanation:
To calculate the activity-based overhead rates, we need to use the following formula:
Predetermined manufacturing overhead rate= total estimated overhead costs for the period/ total amount of allocation base
Designing= 445,200/10,600= $42 per designer hour
Sizing and cutting= 4,081,200/152,000= $26.85 per machine hour
Stitching and trimming= 1,491,000/84,000= $17.75 per labor hour
Wrapping and packing= 346,500/33,000= $10.5 finished unit
If MgCl2 (aq) has a molarity of 2.5 M, then the molarity of the Cl-1 ions is ____ M.
Answer:
molarity of Cl⁻ ions = 5.0 M
Explanation:
The molarity of a solution expresses the amount in moles of a solution present in a litre of solvent. Its unit is mol/L or mol/dm³ written as M.
MgCl₂ when dissolved to form an aqueous solution dissociates into positive and negative ions, Mg²⁺and Cl⁻ ions.
Equation of the dissociation of MgCl₂ in aqueous solution is given below:
MgCl₂(aq) -----> Mg²⁺(aq) + 2Cl⁻(aq)
1 mole of aqueous MgCl₂ produces 2 moles of chloride ions, Cl⁻
Molar concentration of MgCl₂(aq) = 2.5 M
Molarity of chloride ions = number of moles of Cl⁻ ions * molarity of MgCl₂
molarity of Cl⁻ ions = 2 * 2.5 M
molarity of Cl⁻ ions = 5.0 M
Which compounds are organic?
a. CO2
b. NaCl
c. C6 H12 O6
d. CH2P (C6H5)3
Answer:
All of them except NaCl
Explanation:
Organic compounds are compound that basically contain carbon-hydogen bonds. Salt (NaCl) doesn't have carbon, and the rest does. So I think that A, C, and D are the answers.
I hope this helps!
Which statement describes the conditions in which diamonds form?
Answer:
The answer to the question, 'which statement describe the formation of diamonds is option C. Diamond deposits are formed in the earth mantle and release to the earth surface by mean of volcanic eruptions which produce kimberlites. The formation of diamonds require very high temperatures and pressures. These conditions exist below the earth surface at the depth of about 150 kilometers and 1050 degree Celsius temperature.
Explanation:
Answer:
Diamond deposits are formed in the earth mantle and release to the earth surface by mean of volcanic eruptions which produce kimberlites
Explanation:
the molar ratio of cucl2 to Al should be
Answer:
1) The chemical equation is:
Al + CuCl2 ---> Cu + AlCl3
2) You have to balance the equation to state the coefficients:
2Al + 3CuCl2 ---> 3Cu + 2Al Cl3
3) Now the coefficients tell you the molar ratios.
2 mol Al : 3 mol CuCl2 : 3 mol Cu : 2 mol AlCl3
4) The molar ratio of CuCl2 to Al is:
3 mol Cu Cl2 / 2 mol Al = 3/2 = 1.5
Explanation:
Calcium metal reacts with fluorine gas to form solid calcium fluoride. When the reaction is balanced, what coefficient is in front of fluorine gas?
A. 1
B. 2
C. 7
D. 3
Answer:
B= 2
Explanation:
Chemical equation:
Ca + F → CaF₂
Balance chemical equation:
Ca + 2F → CaF₂
Step 1:
Ca + F → CaF₂
Left hand side right hand side
Ca = 1 Ca = 1
F = 1 F = 2
Step 2:
Ca + 2F → CaF₂
Left hand side right hand side
Ca = 1 Ca = 1
F = 2 F = 2
....................
Answer:
what LOLLLL
Explanation:
Answer:
....................
Explanation:
What is more dense, a rock or water and why?
Answer:if a rock sinks, it is more dense than water. Liquid Density examples based upon differences in mass or weight per unit volume. Density of a liquid with a constant volume, varies according to the weight. The higher the weight, the higher the density.
Explanation:
Please helpppppppppppppp
Answer:
C
Explanation:
The train has significantly more momentum by the car, hence there is little change in the train's momentum after collision..
please mark brainliest
B. Hope this helps. If not, am sorry. Bye.
Choose all the answers that apply.
Which of the following statements are true?
OThe space between neurons is called a synapse.
OThe nucleus of a neuron is located in the cell body.
O Practice can increase the speed of neuron signal transfer.
0Axons carry messages toward the cell body.
o Electrical impulses in neurons go two ways.
Answer:
I think this the right answer maybe, the space between neurons is called a synapse. The nucleus of a neuron is located in the cell body. Axons carry messages toward the cell body. These are the true ones I think.
Explanation:
Answer:
1,2, and 4
Explanation:
Transition metals often form ions with a charge of _____-
a) +1
b) -1)
O c) +2
d) -2
e) They can form ions with all of the above charges.
A steel tank contains carbon dioxide at a pressure of 13.0 atm when the temperature is 34oC. What will be the internal gas pressure when the tank and its contents are heated to 100oC
Answer:
D. 15.8atm
Explanation:
Given parameters:
Initial pressure = 13atm
Initial temperature = 34°C = 34 + 273 = 307K
Final temperature = 100°C = 100 + 273 = 373K
Unknown:
Final pressure = ?
Solution:
To solve this problem, we apply a derivation of the combined gas law taking the volume as a constant.
The expression is shown mathematically below;
[tex]\frac{P_{1} }{T_{1} }[/tex] = [tex]\frac{P_{2} }{T_{2} }[/tex]
P and T pressure and temperature values
1 and 2 are initial and final states
Insert the parameters and solve for T₂;
[tex]\frac{13}{307}[/tex] = [tex]\frac{P_{2} }{373}[/tex]
P₂ = 15.8atm
The final pressure will be "15.8 atm".
According to the question,
Initial pressure,
[tex]P_1 = 13.0 \ atm[/tex]
Initial temperature,
[tex]T_1 = 34+273[/tex]
[tex]= 307 \ k[/tex]
Final temperature,
[tex]T_2 = 100+273[/tex]
[tex]= 372 \ k[/tex]
By using the Gay-Lussac's law of pressure and temperature, we get
→ [tex]\frac{P_1}{T_1} = \frac{P_2}{T_2}[/tex]
or,
→ [tex]P_2 = \frac{P_1\times T_2}{T_1}[/tex]
By substituting the values, we get
→ [tex]= \frac{13.0\times 373}{307}[/tex]
→ [tex]= 15.8 \ atm[/tex]
Thus the response above is right.
Learn more:
https://brainly.com/question/24191545
This equation is balanced: N2+3H2 - 2NH3 O
A. True •
B. False
Answer:
True
Explanation:
N2 + 3h2 - 2NH3 is indeed a balanced equation therefore it is a "true statement" or option A. You can tell this equation is balanced because it has the same number of Nitrogen, and Hydrogen atoms on the same side keeping the equation balanced.
Hope this helps.
H3C-CH2-C-CH2-CH2-CH3
CH-CH3
what is the formula of butane
Answer:
Butane : CH3 - CH2 - CH2 - CH3
Explanation:
The word Butane has "But" as preffix which stands for 4 carbon atoms & "ane" as suffix which tells that the compound is of alkane homologous series .
The specific heat of liquid bromine is 0.226 J/g-K. How much heat (J) is required to raise the temperature of 10.0 mL of bromine from 25.00 °C to 27.30 °C? The density of liquid bromine: 3.12 g/mL
Answer:
16.2 J
Explanation:
Step 1: Given data
Specific heat of liquid bromine (c): 0.226 J/g.KVolume of bromine (V): 10.0 mLInitial temperature: 25.00 °CFinal temperature: 27.30 °CDensity of bromine (ρ): 3.12 g/mLStep 2: Calculate the mass of bromine
The density is equal to the mass divided by the volume.
ρ = m/V
m = ρ × V
m = 3.12 g/mL × 10.0 mL
m = 31.2 g
Step 3: Calculate the change in the temperature (ΔT)
ΔT = 27.30 °C - 25.00 °C = 2.30 °C
The change in the temperature on the Celsius scale is equal to the change in the temperature on the Kelvin scale. Then, 2.30 °C = 2.30 K.
Step 4: Calculate the heat required (Q) to raise the temperature of the liquid bromine
We will use the following expression.
Q = c × m × ΔT
Q = 0.226 J/g.K × 31.2 g × 2.30 K
Q = 16.2 J
6. What causes the phases of the moon?
Answer:
The rotation of the Earth.
A::A represents
1. two lone pairs of electrons.
2. one lone pair of clectrons.
3. a double bond.
4. quadruple bond.
Answer:
1
Explanation:
because its to long just why its useless
A mass scale reads 10 kilograms on earth, what would it read on the moon?
A peak elutes from a column at 33.9 min, with a width at half height of 10.4s. How many theoretical plates does this column have?
Answer:
212724 plates
Explanation:
To solve this problem we use the formula:
N = 5.54 (tr/W₀.₅)²
Where
N is the number of theoretical plates,tr is the retention time (33.9 min)and W₀.₅ is the peak width at half height (10.4 s).We solve for N:
10.4 s⇒ 10.4 / 60 = 0.173 minN = 5.54 (33.9/0.173)²N = 212724 platesIdentify which of the following equations are balanced.A. 6Li(s)+N2(g)→2Li3N(s)6Li(s)+N2(g)→2Li3N(s).B. 2KMnO4(s)→K2MnO4(s)+MnO2(s)+O2(g). C. 2KClO3(s)→2KCl(s)+O2(g)2KClO3(s)→2KCl(s)+O2(g). D. Mg(s)+N2(g)→Mg3N2(s)Mg(s)+N2(g)→Mg3N2(s).
Answer:
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A nitrogen atom in N2 should have a
1. charge of 1-.
2. partial charge 8+.
3. charge of 0.
4. partial charge 6-.
Answer:
The answer is partial charge 8+.
2. In a chemistry experiment, 10 g of urea NH2CONH2 (s) is dissolved in 150 ml of water in a simple calorimeter. A
temperature decrease of 3.7°C is measured. Calculate the molar enthalpy of solution for urea.
Answer:In a chemistry experiment, 10g of urea, NH2CONH2 (s), is dissolved in 150 mL of water in a simple calorimeter. A temperature decrease of 3.7oC is measured. Calculate the molar enthalpy of solution (∆Hs). ... an ideal gas B if 0.622 g sample of gas B occupies a volume of 300 mL at 35 °C and 1.038 atm.
Explanation:
A local FM radio station broadcasts at a frequency of 99.0 MHz. Calculate the energy of the frequency at which it is broadcasting. energy in kj/photon
1MHz=10^6 sec-1
Answer:
Sorry i don't know the answer
.
.
buy if you don't mind then i want to ask something
Which class question is this?
Can you help with these two questions pleaseeee
Answer: H2Te
Explanation:
H2Te has the highest molecular weight and thus it has the highest boiling point from H2S and H2Se.