Answer:
2NaBr + Cl2 =2NaCl + Br2
Explanation:
Change the coefficient in from of the NaCl so you have the same number of Cl atoms on both sides.
Change the coefficient in front of the NaBr to balance the Br atoms as well as the Na.
Answer:
1,2,2,1
hope it helps
this is correct answer of this question
Can someone please help me
Answer:
Potassium iodide increases the decomposition rate of hydrogen peroxide.
Explanation:
Potassium iodide increases the decomposition rate of hydrogen peroxide because potassium iodide act as a catalyst. A catalyst speed up the process of chemical reaction without reacting with the molecules present in reaction. If the potassium iodide is not present as a catalyst for the decomposition of hydrogen peroxide then the decomposition of hydrogen peroxide takes too much time because the catalyst is absent that speed up the reaction.
a solution is prepared by dissolving 4.85 g of HCl into enough water to make 2.50 L of a solution
Answer:
0.0532 M
Explanation:
Just did the test :)
An atom is to a molecule as
A.a nail is to a hammer
B. A brick is to a house
C. A house cat is to a lion
D. A sentence is to a word.
Answer:
it is B ^^ have a great day
Answer:
the correct answer is c a brick to a house
Explanation:
E
explain answer too, CHEM HELP
Please help me thanks so much
Answer:
the answer is in the next one I just answered
Calculate the number of moles of solute in 27.55 mL of 0.1185 M K2Cr2O7(aq).
Answer:
0.01185M = moles/0.02755L
0.02755*0.01185=0.00032647
Explanation:
True or false. Compounds are two or more DIFFERENT elements.
A. True
B. False
Answer:
the answer is letter B,FALSE
A sample of nitrogen gas has a temperature of 22.7oC when the volume of the container is 12.2L and it is under 150.4kPa of pressure. What temperature, in Kelvin, would the gas need to be in order to occupy a 9.7L container at 101.3kPa? Show all your work and round your answer to the hundredths place.
22.7 degrees Celsius = 22.7 + 273 = 295.7 K
[tex]\frac{(12.2)(150.4)}{295.7}=\frac{(9.7)(101.3)}{T_{2}} \\ \\ \frac{295.7}{(12.2)(150.4)}=\frac{T_{2}}{(9.7)(101.3)} \\ \\ T_{2}=\frac{(295.7)(9.7)(101.3)}{(12.2)(150.4)} \approx \boxed{158.35 \text{ K}}[/tex]
Please help me with this
Answer:
C
Explanation:
Protons and neutrons!
Have a great day :))))
what are the main forces that operate between nonpolar molecules
Answer:
Van der Waals forces
Explanation:
Answer:
Dispersion
Explanation:
They said it was the answer.
Why do convection currents matter in our lives today? How do they affect us?
Answer:
Convection currents are the result of differential heating. Lighter (less dense), warm material rises while heavier (more dense) cool material sinks. It is this movement that creates circulation patterns known as convection currents in the atmosphere, in water, and in the mantle of Earth. These constantly circulating cells of hotter and cooler molten rock are thought to help heat the surface. Some geologists believe convection currents within the earth are a contributing cause of volcanoes, earthquakes, and continental drift.
Explanation:
Complete the following reaction.
14
N+
7
C+ H
1
Answer: 23/10 n
Explanation:
Some signs of chemical change include
(Select only 1 answer)
A)All of these
B)producing an odor
C)changing color
D)releasing gas
Answer:
I think it would be A honestly...
what energy is watching tv
1.thermal
2.sound
3.light
4.electrical
5.mechanical
Answer:
4. electrical
Explanation:
The answer is electrical let me know if it's right
Which layer of the ocean can support organisms that photosynthesize?
Answer:
Epipelagic zone
Explanation:
The Epipelagic zone is the upper most layer of the ocean. It is the layer which receives maximum sunlight, because of availability of sunlight and nutrients like fresh oxygen and atmospheric carbon dioxide, this zone is suitable for active photosynthesis activity.
water is a ----------- natural resources
Answer:
True
Explanation:
The order of the layers from the inside of the Earth outwards is:
(10 Points)
Mantle, crust, core
Core, mantle, crust
Core, crust, mantle
Mantle, core, crust
Use the References to access important values if needed for this question.
According to the following reaction, how many moles of sodium hydroxide will be formed upon the complete reaction of 0.263 moles
sodium with excess water?
2Na(s) + 2H, 0() 2NaOH(aq) + H2(g)
mol sodium hydroxide
Submit Answer
Retry Entire Group
2 more group attempts remaining
Answer:
0.263 mole of NaOH
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
2Na + 2H₂O —> 2NaOH + H₂
From the balanced equation above,
2 moles of Na reacted to produce 2 moles NaOH.
Finally, we shall determine the number of mole of NaOH produced by the reaction of 0.263 mole sodium, Na. This can be obtained as follow:
From the balanced equation above,
2 moles of Na reacted to produce 2 moles NaOH.
Therefore, 0.263 mole of Na will also react to produce 0.263 mole of NaOH.
Thus, 0.263 mole of NaOH was obtained from the reaction.
A gas that exerts a pressure of
15.6 psi in a container with a volume of
L will exert a pressure of
25.43 psi when transferred to a
container with a volume of 1.895 L.
Answer:
3.1L
Explanation: using Boyle's law p1v1=p2v2
p1=15.6,v1=?,p2=25.43,v2=1.895
manipulate the formula to favor so to find v1 the formula would be
p2v2/p1
25.43*1.895\15.6=3.1L
How does the Sun get energy?
Answer:
Nuclear fushion
Explanation:
The sun generates energy from a process called nuclear fusion. During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons
the sum of all potential and kinetic energies for all particles in the system is called what?
Answer:
mechanical energy
hope it helps and your day will be full of happiness
PLEASE HELP
CH4 + 2O2
Answer:
the answer of the question is =ch4+2o2
If 0.959J of heat is added to 0.88g of water, how much will its temperature increase
Answer:
0.260 Celsius
Explanation:
q =c x m x (T2-T1)
c - specific heat of water 4.186 J/g.C
T2-T1 = q /(c x m) = 0.959 /(4.186 x 0.88) = 0.959/3.68 =0.260 C
Which of the following chemical equations is balanced correctly?
Cl2 + NaI—> 2 NaCl + 12
B202 + 2C—>B4C +CO
C6H6 + 02–>2C02 + 3H20
CS2 + 3C12–>CCl4 +S2Cl2
A 3.6 g sample of iron (III) oxide reacts with sufficient aluminum to be entirely used up.
How much iron is produced?
Answer:
0.046 mol
Explanation:
Step 1: Write the balanced equation
Fe₂O₃ + 2 Al ⇒ 2 Fe + Al₂O₃
Step 2: Calculate the moles corresponding to 3.6 g of Fe₂O₃
The molar mass of Fe₂O₃ is 159.69 g/mol.
3.6 g × 1 mol/159.69 g = 0.023 mol
Step 3: Calculate the moles of Fe produced from 0.023 moles of Fe₂O₃
The molar ratio of Fe₂O₃ to Fe is 1:2.
0.023 mol Fe₂O₃ × 2 mol Fe/1 mol Fe₂O₃ = 0.046 mol Fe
The rate constant of a reaction is 6.4 × 10−3 s−1 at 25°C, and the activation energy is 33.6 kJ/mol. What is k at 75°C? Enter your answer in scientific notation.
Answer:
k₂ = 5 x 10⁻² s⁻¹
Explanation:
Using the Clausis - Clapyron Equation ...
ln(k₁/k₂) = ΔH/R(T₁-T₂/T₁·T₂) => lnk₂ = lnk₁ + ΔH/R(T₁-T₂/T₁·T₂)
k₁ = 6.4 x 10⁻³s⁻¹
ΔH = 33.6 Kj/mole
R = 0.008314 Kj/mol·K
T₁ = 25°C = 298K
T₂ = 75°C = 348K
lnk₂ = ln(6.4 x 10⁻³s⁻¹) + (33.6kj/mol·K/0.008314Kj/mol·K)·[(348K - 298K)/(348K)(298K)] = -3.10s⁻¹
k₂ at 75°C = exp(-3.10) = 5 x 10⁻²s⁻¹ (faster k-value at higher temp)
1. An unknown amount of water
was heated with 3.5 kJ, raising
its temperature from 26°C to
66°C. What was the mass of
the water?
Answer:
20.93 g
Explanation:
From the question given above, the following data were obtained:
Heat (Q) = 3.5 KJ
Initial temperature (T₁) = 26°C
Final temperature (T₂) = 66°C
Mass (M) =?
Next, we shall convert 3.5 KJ to J. This can be obtained as follow:
1 KJ = 1000 J
Therefore,
3.5 KJ = 3.5 KJ × 1000 J / 1 KJ
3.5 KJ = 3500 J
Next, we shall determine the change in the temperature of the water. This is illustrated:
Initial temperature (T₁) = 26°C
Final temperature (T₂) = 66°C
Change in temperature (ΔT) =?
ΔT = T₂ – T₁
ΔT = 66 – 26
ΔT = 40 °C
Finally, we shall determine the mass of the water. This can be obtained as follow:
Heat (Q) = 3500 J
Change in temperature (ΔT) = 40 °C
Specific heat capacity (C) = 4.18 J/gºC
Mass (M) =?
Q = MCΔT
3500 = M × 4.18 × 40
3500 = M × 167.2
Divide both side by 167.2
M = 3500 / 167.2
M = 20.93 g
Therefore, the mass of the water is 20.93 g
In the equation:
2H2 + O2 --> 2H2O
What mass of Hydrogen Gas will completely react with 4 moles of Oxygen gas
(Hint: going from moles to mass of another compound)
A)8 g
B)16 g
C)24 g
Answer:
B) 16 g
Explanation:
2H₂ + O₂ → 2H₂OFirst we convert 4 moles of O₂ into moles of H₂, using the stoichiometric coefficients of the balanced reaction:
4 mol O₂ * [tex]\frac{2molH_2}{1molO_2}[/tex] = 8 mol H₂Finally we convert 8 moles of H₂ into grams, using its molar mass:
8 mol H₂ * 2 g/mol = 16 gThus, the correct answer is option B).
Which sentence correctly explains the process and conditions needed for rain to form?
A. Rain only falls during thunderstorms and extreme weather in below freezing temperatures.
B. Ice crystals melt as they fall through a layer of warm air and then refreeze into a solid form as they fall.
C. Water vapor freezes into solid ice crystals, and the temperature of the air should be below freezing.
D. The temperature in the sky needs to be above freezing, and water vapor condenses into liquid water.
Answer:
B. Ice crystals melt as they fall through a layer of warm air and then refreeze into a solid form as they fall.
Explanation:
Answer:B
Explanation:
The difference between voltaic and electrolytic cells is that:
Answer:
Voltaic cells convert chemical energy to electrical energy by means of an oxidation-reduction reaction. Electrolytic cells convert electrical energy to chemical energy, so they are the opposite of voltaic cells. They require an input of electrical energy to cause an oxidation-reduction reaction.
Explanation:
that good enough for ya my asian friend?
Answer:
This is the answer hopefully you understand this also can you mark me brainliest pls