Answer:
Approximately [tex]2.46\; \rm mol[/tex].
Explanation:
Make use of the molar mass data ([tex]M({\rm C_2H_2}) = 26.04\; \rm g \cdot mol^{-1}[/tex]) to calculate the number of moles of molecules in that [tex]64.0\; \rm g[/tex] of [tex]\rm C_2H_2[/tex]:
[tex]\begin{aligned}n({\rm C_2H_2}) &= \frac{m({\rm C_2H_2})}{M} \\ &= \frac{64.0\; \rm g}{26.04\; \rm g\cdot mol^{-1}}\approx 2.46\; \rm mol\end{aligned}[/tex].
Make sure that the equation for this reaction is balanced.
Coefficient of [tex]\rm C_2H_2[/tex] in this equation: [tex]2[/tex].
Coefficient of [tex]\rm H_2O[/tex] in this equation: [tex]2[/tex].
In other words, for every two moles of [tex]\rm C_2H_2[/tex] that this reaction consumes, two moles of [tex]\rm H_2O[/tex] would be produced.
Equivalently, for every mole of [tex]\rm C_2H_2[/tex] that this reaction consumes, one mole of [tex]\rm H_2O[/tex] would be produced.
Hence the ratio: [tex]\displaystyle \frac{n({\rm H_2O})}{n({\rm C_2H_2})} = \frac{2}{2} = 1[/tex].
Apply this ratio to find the number of moles of [tex]\rm H_2O[/tex] that this reaction would have produced:
[tex]\begin{aligned}n({\rm H_2O}) &= n({\rm C_2H_2}) \cdot \frac{n({\rm H_2O})}{n({\rm C_2H_2})} \\ &\approx 2.46\; \rm mol \times 1 = 2.46\; \rm mol\end{aligned}[/tex].
Mallory combines two chemicals and notices that each chemical retains its original properties. What did Mallory form?
O a mixture
a compound
an element
an atom
Answer:
A mixture
Explanation:
What two metals are have atoms larger than that of sodium
Answer: potassium and rubidium
Explanation:
1) The group 1 of the periodic table contain six elements namely Lithium(Li), Sodium(Na),Potassium(K),Rubidium(Rb),Cesium(Cs) and Francium(Fr). These metals are called alkali metals because they form alkalies( i.e. strong bases capable of neutralizing acids) when they react with water.
2) The heavier alkali metals (K, Rb, and Cs) react so vigorously that they invariably explode.
3) This trend, which is not consistent with the relative magnitudes of the reduction potentials of the elements, serves as another example of the complex interplay of different forces and phenomena—in this case, kinetics and thermodynamics.
When using a calorimeter, the initial temperature of a metal is 70.4C. The initial temperature of the water is 23.6C. At the end of the experiment, the final equilibrium temperature of the water is 29.8C.
Answer:
temperature of a metal is29.8
temp. of water is 6.2
temp. change of metal -40.6
Explanation:
can someone do my watershed project ill give brainly and 80 points
A scientist plans the react 9.0x10^-2 L NO held at a pressure of 200.0kPa and a temperature of 20.0 C with excess hydrogen. How many moles of nitrogen gas will be produced
Answer:
[tex]n_{N_2}=0.00369molN_2[/tex]
Explanation:
Hello there!
In this case, by firstly setting up the described chemical reaction, we are able to write:
[tex]2NO(g)+2H_2(g)\rightarrow N_2(g)+2H_2O(g)[/tex]
Thus, given the pressure (convert to atm), volume and temperature (convert to K) we can calculate the moles of NO:
[tex]n=\frac{PV}{RT}\\\\n=\frac{200.00/101.325atm*0.090L}{0.08206\frac{atm*L}{mol*K}*(20.0+273.15)K} \\\\n=0.00738molNO[/tex]
Next, we use the 2:1 mole ratio of NO to N2 to obtain the moles of nitrogen gas that will be produced:
[tex]n_{N_2}=0.00738molNO *\frac{1molN_2}{2molNO} \\\\n_{N_2}=0.00369molN_2[/tex]
Regards!
Balance the equation !!!
Answer:
https://www.webqc.org/balance.php
Explanation:
this is the website i used to balance all my chem equations
i promise its not a scam its a legit website lol it works rly well
A sample of hydrogen gas collected by displacement of water occupied 30mL at 24 C on a day when the barometric pressure was 736t orr. What volume would the hydrogen occupy if it were dry and at STP? The vapor pressure of water at 24 C is 22.4 torr
Answer:
[tex]v_2=6,48*10^{-4}L[/tex]
Explanation:
From the question we are told that:
Volume of hydrogen [tex]V_1=30mL=>30*10^{-3}[/tex]
Temperature [tex]T_1=24C=>24+273=>297k[/tex]
Pressure of water [tex]P_1=22.4torr=>\frac{22.4}{760}=0.0295atm[/tex]
Let
STP(Standard Temperature and pressure)
[tex]T_2=273K[/tex]
[tex]P_2=1atm[/tex]
Generally the equation for ideal gas is mathematically given by
[tex]\frac{p_1V_1}{T_1}=\frac{P_2V_2}{T_2}[/tex]
Therefore
[tex]v_2=\frac{P_1v_1T_2}{T_1P_2}[/tex]
[tex]v_2=\frac{0.0295*30*10^{-3}*273}{297*1}[/tex]
[tex]v_2=6.48*10^{-4}L[/tex] (at STP(Standard Temperature and pressure))
Which element is classified as a
metalloid?
a.
Boron
b. Potassium
C.
Sulfur
d. Xenon
Answer: Boron
Explanation:
If your end product is 1.5 moles of KMnO4, how many moles of manganese oxide were used in the reaction?
The equation for the production of potassium permanganate is as follows:
2 MnO2 + 4 KOH + O2 → 2 KMnO4 + 2 KOH + H2
You must show all work
Answer:
1.5 moles of KMnO4 will be produced from 1.5 moles of MnO2
Explanation:
The balanced equation of this chemical reaction is
2 MnO2 + 4 KOH + O2 → 2 KMnO4 + 2 KOH + H2
2 moles of MnO2 produces 2 moles of KMnO4
That means 1 moles of KMnO4 will be produced from 1 moles of MnO2
Hence, 1.5 moles of KMnO4 will be produced from 1.5 moles of MnO2
The moles of manganese oxide were used in the reaction is 1.5 moles.
What is stoichiometry?Stoichiometry of any reaction tells about the relative amount of species present before and after the chemical reaction.
Given chemical reaction is:
2MnO₂ + 4KOH + O₂ → 2KMnO₄ + 2KOH + H₂
From the stoichiometry of the reaction, it is clear that same moles of manganese oxide and potassium permanganate is involved in the reaction.
2 moles of KMnO₄ = produce by 2 moles of MnO₂
1.5 moles of KMnO₄ = produce by 2/2×1.5=1.5 moles of MnO₂
Hence, required moles are 1.5 moles.
To know more about moles, visit the below link:
https://brainly.com/question/24631381
An electric current is produced when ______________________ move continuously batteries magnets electric charges wires
Answer:
electric charges.
Explanation:
Conduction involves the transfer of electric charge or thermal energy due to the movement of particles. When the conduction relates to electric charge, it is known as electrical conduction.
An electron can be defined as subatomic particles that are negatively charged and as such has a magnitude of -1.
An electric current is produced when electric charges (electrons) move continuously and it's measured in Amperes through the use of an ammeter.
Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.
Mathematically, Ohm's law is given by the formula;
[tex] V = IR[/tex]
Where;
V represents voltage measured in voltage.
I represents current measured in amperes.
R represents resistance measured in ohms.
how many moles are in 29.8grams of CaCl2?
Answer:
110.984 ?
i apologize if i'm wrong, you can report it if im wrong
have a good day/ night
Explanation:
What does a bi-directional arrow tell you about a chemical reaction?
The part of an atom that is responsible for the bonding of atoms is —
A. protons
B. valence electrons
C. neutrinos
D. neutrons
Answer:
B
Explanation:
Valence electrons only involve in chemical bonding, since they are farthest from the nucleus. Hope this helps!
what is ionic compounds??
Answer:
The ionic compounds are chemical compounds composed of ions, which is held together by electrostatic forces termed ionic bonding.
How do you balance this equation?
Answer:
Al4C3 + 12H2O = 3CH4 + 4Al(OH)3
Explanation:
Not sure if any explanation is needed but always start with the most complex compound. In this case it is Al(OH)3. You can see that there is 4 Aluminiums on the other side so I would start by putting a 4 next to the Al(OH)3. This now gives me 12 Hydrogens and 12 Oxygens on the right side. I put a 3 next to the CH4 to balance the Carbons on the left side. This leaves me with 12 Oxygens and 24 Hydrogens on the right side. This ends up being perfect because I can put a 12 next to the H2O.
Which of the following best describes Avogadro's number?*
A) An equation that can be used to calculate how many atoms are in one mole of
anything
B) A variable that represents the value of the atomic mass relative to one mole of an
element
C) A constant that states how many atoms/molecules are in one mole of anything
D)An expression in scientific notation that represents the average atomic mass of an
element
Answer:
C) A constant that states how many atoms/molecules are in one mole of anything
Explanation:
Avogadro's number like the name suggests is a constant that states how many atoms/molecules are in one mole of anything.
In a bakery shop, a chef bakes a cake in an electric oven. The energy outputted from the oven becomes an input to the cake system.
Which energy form is readily outputted from the oven system?
A. chemical energy
B. electrical energy
C. sound energy
D. thermal energy
Write a chemical equation for the following reaction. (Type your answer using format CH4 for CH4.) In water, iron(III) chloride reacts with sodium hydroxide, producing solid iron(III) hydroxide and sodium chloride.
Answer:
FeCl3(aq) -
3NaOH(aq) 0 Fe(OH)3(s) -
3NaCl(aq)
Explanation:
FeCl3(aq) -
3NaOH(aq) 0 Fe(OH)3(s) -
3NaCl(aq)
PLEASE ANSWER I GIVE BRAINLIEST AND MAX POINTS
Answer:
I believe the answer is A (changes in air temperature result in differences in air pressure which causes wind). Hope this helps
Explanation:
does neutrons have a orbit outside the atom
Answer:
No because it's located inside the nucleus of the atom
hope this helps
have a good day :)
Explanation:
This unknown element could most likely be a part of which of the following
familles?
A Alkall metals
B Alkaline earth metals
C Halogens
D Noble Gases
Answer:
halogen
Explanation:
because the lewis dot structure shows 7 dots which means 7 valence electron. halohe falls on group 17 or7A having 7 valence electron
A gas' pressure is 850 torr at 47 degrees. At what temperature will the pressure be 655 torr?
Answer:
From Pressure Law
P1/T1 = P2/T2
Changing our temp to kelvin
T1 = 47 +273 = 320K
We're looking for T2
Making T2 the subject
T2 =P2 x T1 / P1
= 655 x 320/850
T2 = 246K
Which of the following is NOT an advantage that can only be gained by the use of digital data transmission instead of analog transmission?
A. Has less static
B. Carries more information
C. Takes up less bandwidth
D. Provides higher resolution images
Answer:
D. Provides higher resolution images
Explanation:
The advantages gained by the use of digital data transmission instead of analog transmission are;
1) Noise do not damage digital signal transmission but they impact on analog signals. Digital signals are therefore more secure than analog signals
2) The bandwidth required for digital signal transmission is much less than the bandwidth required for analog
3) Digital signal allow data transmission to very long distance
4) The rate of transmission with digital signals is higher with digital signals
5) Digital signals allow easy and cost effective methods by which they are replicated
The resolution of an image is a measure of the amount of pixels displayed per inch of the image, such that a high resolution image has more pixel per inch of the image. It is therefore a factor determined at the source of the image based on how much detail is required in an image before transmission
Can someone please help me pls
Answer:
I guess option d
hope I am correct
if a half life is 2.5 hours, how long is 2 half life's
Answer:
Im not really sure what a half life is, but two of them would be 5.0 hours
Answer:
5 hours
Explanation:
cause if half life is 2.5hours we just multiply it by two and get 5 hours
A fire is an example of an exothermic reaction. Which of the following best
supports that statement?
A. The fire is creating energy.
B. The fire is releasing energy.
C. The fire is capturing energy.
D. The fire is destroying energy.
Answer: B. Fire is releasing energy
Explanation:
Anyone know the answer to this one?
Answer:
C) 0.24 M
Explanation:
The given chemical reaction is presented as follows;
H₂SO₄(aq) + 2 KOH(aq) → K₂SO₄(aq) + 2 H₂O(l)
The titration experiment results are;
Volume of H₂SO₄(aq) used = 12.0 mL
Volume of KOH (aq) used = 36.0 mL
Concentration of KOH (aq) = 0.16 M
The number of moles of KOH present, n = 0.16 M × 36/1000 = 0.00576 moles
From the given reaction, 1 mole of H₂SO₄ reacts with 2 moles of KOH to give 1 mole of K₂SO₄ and 2 moles of H₂O
Therefore, 0.00576 moles of KOH reacts with (1/2) × 0.00576 moles = 0.00288 moles of H₂SO₄
Therefore, for the reaction;
The number of moles of H₂SO₄ in 12.0 mL of H₂SO₄ = 0.00288 moles
The concentration of the H₂SO₄ = 0.00288 M/(12.0 mL) = 0.24 M
The concentration of H₂SO₄ in the reaction = 0.24 M.
When copper (II) chloride reacts with sodium nitrate, NaNO3, copper (II) nitrate, Cu(NO3)2, and sodium chloride are formed. Write a balanced chemical equation for this reaction. Then determine how much sodium chloride can be formed when 15.0 grams of copper (II) chloride react with 20.0 grams of sodium nitrate.
Answer:
CuCl2 + 2NaNO3 → Cu(NO3)2 + 2NaCl
Explanation:
m(NaCl) =m(CuCI2) × 2Mr(NaCl) / Mr(CuCI2)
= 15 × 2 × (94/135)
=20.89 g
Why study science?
Lmk ASAP
Balance the equation
H2C2O2 + KOH——>K2C2O4 + H2O
Answer:
H2C2O2 + 2KOH ----- K2C2O4 + 2H2O