Answer:
C. NaHCO3 → Na2CO3 + H2O + CO2
Explanation:
» For a balanced equation, the number of atoms of reactants and products must be equal.
» In equation C, the reactant side has one sodium atom while ptoduct side has 2 sodium atoms.
» The balanced equations mus be;
[tex]{ \rm{ 2NaHCO _{3(aq)} → Na _{2}CO _{3(s)}+ H _{2} O _{(l)} + }CO _{2(g)} }[/tex]
Answer:
Option C
Explanation:
Let's balance that
[tex]\\ \tt\hookrightarrow 2NaHCO_3\longrightarrow Na_2CO_3+H_2O+CO_2[/tex]
On reactant side
Na=2H=2O=6C=2On products side
Na=2H=2O=6C=2Of the bonds listed below the weakest bond is _______ and the strongest is ________. A strong bond is a (stable / unstable) bond
2(H—C ≡ C—H) + 5(O = O) → 4 (O—C—O) + 2 (H—O—H)
839 kJ/mol C ≡ C # of bonds ______ (product / reactant) side Energy:_____
495 kJ/mo O = O # of bonds ______ (product / reactant) side Energy:_____
413 kJ/mo C—H # of bonds ______ (product / reactant) side Energy:_____
I need help with this. I am a Learning Coach and I don't understand.
Based on the data given of the bonds listed below, the weakest bond is C-H and the strongest bond is C ≡ C.
A strong bond is a stable bond.
Which of the bonds listed is the weakest and which is the strongest?The strength of a bond is proportional to the amount of energy required to break or form the bond.
A weak bond will require less energy to form than a strong bond.
A weak bond is unstable while a strong bond is stable.
Data provided:
839 kJ/mol C ≡ C
495 kJ/mo O = O
413 kJ/mo C—H
From the data given of the bonds listed below, the weakest bond is C-H and the strongest bond is C ≡ C.
A strong bond is a stable bond.
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What is linear expansion
Answer:
Thermal expansion is the tendency of matter to change its shape, area, volume, and density in response to a change in temperature, usually not including phase transitions. Temperature is a monotonic function of the average molecular kinetic energy of a substance.
Ammonia reacts with fluorine gas according to the thermochemical equation given
below. Calculate the heat transferred, in kJ, when 34.0g of ammonia reacts with 190.0g
of fluorine. Will this heat be released or absorbed? Briefly explain your reasoning.
NH3 (g) + 3F2 (g) → NF3 (g) +3HF (g)
AH°rxn = -881.2 kJ
Heat transferred is already given in the question
∆H_rxn=-881.2kJAs ∆H is negativeThe reaction is endothermic and 881.2kJ of heat is absorbed .A gamma ray has a frequency of 2.88 x 1021 Hz. What does this mean?
Answer:
A gamma ray has a frequency of 2.88 x 10^21 Hz. What does this mean? It is how fast the wavelength is moving and is the number of how many pass a certain in a second. How does light emitted from a neon sign differ from light from the sun? Neon light only emits certain colors while sunlight emits all colors.
Explanation:
A gamma ray has a frequency of 2.88 x 10^21 Hz. What does this mean? It is how fast the wavelength is moving and is the number of how many pass a certain in a second. How does light emitted from a neon sign differ from light from the sun?
If 1200 J of energy is lost by a metal nail as it cools in a bucket of water, how much energy is gained by the water?
Heat lost (metal)=Heat gained (water)
Q in = Q out
So energy gained by the water = 1200 J
Give an example of chemical equilibrium you have come across into your day-to-day life. Explain how it meets the definition of equilibrium.
three forms of radiation are also called ionizing radiation
Answer:
Alpha Particle, Beta Particles and Gamma Rays
Explanation:
What happens when a glass of water is set in the sun until the water
evaporates?
A. Activation energy increases.
B. Enthalpy decreases.
C. Condensation increases.
D. Entropy increases.
Answer:
D is the answer
Explanation:
A cat goes to the vet and weighs 8.92 pounds. How many grams does this represent? (1 pound = 454 grams) _________ g
Give your answer in scientific notation
Answer:
4049.68 or 3632
Explanation:
454x8.92=4049.68 but if thats incorrect then its 3632 cause it says 1 pound=454 grams so 8x454=3632.
Balance the following chemical equation (if necessary):
C6H6 (I) + O2(g) → H2O(g) + CO2 (g)
[tex]\\ \sf\longmapsto 2C_6H_6+15O_2\longrightarrow 6H_2O+12CO_2[/tex]
On reactant side
C=12H=12O=30On products side
C=13O=30H=12Hence balanced
For a concave mirror, incident light beams through C will reflect:
(a) back through C
(b) through F
(c) parallel to PA
Answer:
c
Explanation:
hi there, giving brainliest to best answer. no spammers
Answer:
D. Earth's northern hemisphere is tilted toward the Sun
Explanation:
You can see in the picture above that the northern hemisphere is past the perpendicular to orbit line to the right.
2,2-dichlorohexane 4 , 4 Give two reason, explain why 2,2-dichloro-3-methylbutane has structure isomer of 2, 2 dichloropentane.
Answer:explain why 2,2-dichloro-3-methylbutane has structure isomer of 2, 2 dichloropentane. Although there are 12 hydrogen atoms in the molecule, there only 4 possible 1H chemical environments for the hydrogen atoms in 2-methylbutane molecule.
Explanation:
write the action of monohydroxy benzene with aqueous bromine
The reaction yields the product compound 2,4,5-tribromophenol.
Bromination of monohydroxy benzeneBromination is an organic reaction in which aqueous bromine is made to react with another compound so as to introduce bromine into the molecule.
When we carry out the bromination of monohydroxy benzene, we obtain the compound 2,4,5-tribromophenol.
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You are using your hot air balloon to travel. At constant pressure, you decrease the temperature of the gas by turning down the flame. What do you expect to happen to the volume of the 400 L balloon as the temperature decreases
Considering the Charles's Law, if you decrease the temperature of the gas by turning down the flame, the volume of the 400 L ballon decreases.
Charles's LawCharles's Law consists of the relationship between the volume and temperature of a certain amount of ideal gas, which is maintained at a constant pressure.
For a certain amount of gas at a constant pressure, as the temperature increases, the volume of the gas increases and as the temperature decreases, the volume of the gas decreases because the temperature is directly related to the energy of movement of the gas molecules.
That is, the volume is directly proportional to the temperature of the gas.
Volume of the balloonIn this case, taking into account the Charles's Law, at constant pressure, if you decrease the temperature of the gas by turning down the flame, the volume of the 400 L ballon decreases.
Learn more about Charles's Law:
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How does a fire extinguisher stop a combustion reaction?
[tex] \: \huge\begin{gathered} {\underline{\boxed{ \mathcal{\orange{Answer}}}}}\end{gathered}[/tex]
Carbon dioxide is heavier than air and does not support combustion. Carbon dioxide extinguishes fire by displacing oxygen or by taking away oxygen from the fire triangle.
Carbon dioxide is also very cold when it comes out of the extinguisher.
Thus, it reduces the temperature of the fuel as well.
Chemistry mixes 108 g of O2, with 232 L of C3Hg at STP. How many grams of H2O will be produced? The balanced equation for this reaction is:
CH, +5 02 + 3 CO2 + 4H2O
write down the value to show the mass of water produced when 168g of sodium hydrogen carbonate breaks down completely
breakfast is that carry blood away from the heart are called
You will need to prepare 12 mL of 25% Sodium Phosphate Buffer (pH 4) solution for Activity 2. What volume of the stock Sodium Phosphate Buffer and Water will you need to measure out
Assuming the concentration of stock solution is 50% sodium phosphate buffer solution, the volume of stock solution required is 6 mL and the volume of water required is 6 mL.
What volume of a stock Sodium phosphate buffer and water is needed to 12 mL of 25% sodium phosphate buffer of pH 4?The process of preparing solutions from stock solutions of higher concentration is known as dilution.
Dilution is done with the aid of the dilution formula given below:
C1V1 = C2V2where
C1 is the concentration of stock solutionV1 is the volume of stock solution required to prepare a diluted solution C2 is the concentration of the diluted solution preparedV2 is the final volume of the diluted solutionFrom the data provided:
C1 is not given
V1 is unknown
C2 = 25%
V2 = 12 mL
Assuming C1 is 50% solutionVolume of stock, V1, required is calculated as follows:
V1 = C2V2/C1
V1 = 25 × 12 /50
V1 = 6 mL
Therefore, the volume of stock solution required is 6 mL and the volume of water required is 6 mL.
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Which substance dissolves most readily in gasoline?
A)CH4
B) NaOH
C) NaBr
D) HCl
Answer:
A. CH4
Explanation:
Name three elements that are named after people.
Answer:
Bohrium (Niels Bohr)
Curium (Marie and Pierre Curie)
Einsteinium (Albert Einstein
Need help soon as possible
Answer:
I'm sorry if this isn't right but I think its Bromine? Lithium Bromide is an ionic bond, but the others don't bond with Lithium. Let me know if I am wrong.
Explanation:
metals are conducter of electricity how can you prove this statement? Describe
Answer:
if we connect bulb to the metal wire and connect wire's end through the battery then, the bulb will glow which shows that metal is good conductor of heat and electricity. Now if we connect bulb through a wooden scale, then bulb will not glow So,this shows it is bad conductor of heat and electricity.
A female spinach plant with flat (Ff) leaves is crossed with (pollination and fertilization occur) a male spinach plant with crinkly (ff) leaves. Explain what genes and traits the offspring will inherit. (Use the punnett square from your previous questions)
Your explanation should:
Identify the type of reproduction.
Compare the genetic variation among offspring (cause and effect)
Include a model to support your written response.
PLEASE HELP 100PTS
Answer:
the genes and traits of the offspring is a 50/50 chance.
Explanation:
The type of reproduction has 2 parents involved
If Johnathan runs 800 meters in 200 seconds, and Abby runs 200 meters in 40 seconds, who is
faster and by how much?
Answer:
Explanation:
Solution,
For Johnathan
Distance(d)=800m
Time(t)=200sec
Now,
Speed=d/t=800/200=4m/s
For Abby
Distance(d)=200m
Time(t)=40sec
Now,
Speed=d/t=200/40=5m/s
Here, Abby is faster by 1m/s.
1) Kinetic energy is the energy an object has due to its
Position
Weight
Mass
Gravity
Motion
Answer:
the answer to the answer above is motion
waves in the ocean are 6m apart and pass a surfer every 2 s. what is the wave speed
[tex]\\ \tt\hookrightarrow Speed=\dfrac{Distance}{Time}[/tex]
[tex]\\ \tt\hookrightarrow Speed=\dfrac{6}{2}[/tex]
[tex]\\ \tt\hookrightarrow Speed=3m/s[/tex]
Answer:
Given, Distance travelled(d)=6m
Time taken(t)=2sec
Speed(s)=?
We know that,
[tex] \purple {speed(s) = \frac{distance \: travelled(d)}{time \: taken(t)}} [/tex]
[tex] \purple{speed(s) = \frac{6m}{2sec} }[/tex]
[tex] \purple{speed(s) = 3 m /s}[/tex]
Question 2 of 10
Which of the following describes a chemical reaction?
A. Molecules interact without bonds breaking.
B. Substances change shape but not properties.
C. Atoms in substances react with each other.
D. Molecules mix without interacting.
SUBMIT
10000 g = 1 kg
Group of answer choices
this is a correct equality
this is an incorrect equality
Answer:
This is an incorrect equality
Explanation:
There is 1000g in 1 kg
URGENTTTTTTTT
What is the mass of 10.00mL of water at 33℃?
Answer:
9.93712g
Explanation:
You have 10mL of water at 33 degrees, so you want to look at the density of water at 33 degrees. Then you multiply that density (.993712) by 10 and the mL cancel out and you are left with 9.93712g.
Hope this helps!
