Answer: Carbon dioxide reacts with calcium hydroxide solution to produce a white precipitate of calcium carbonate. Limewater is a solution of calcium hydroxide. If carbon dioxide is bubbled through limewater, the limewater turns milky or cloudy white.
Explanation:
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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:
What is the molar it's of a solution that has 0.080 moles of calcium chloride dissolved in 850mL of solution.
Answer:
The molarity of the solution is 0.094 [tex]\frac{moles}{liter}[/tex]
Explanation:
Molarity is a measure of the concentration of that substance and is defined as the number of moles of solute that are dissolved in a given volume.
The molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution:
[tex]Molarity=\frac{number of moles of solute}{volume}[/tex]
Molarity is expressed in units[tex]\frac{moles}{liter}[/tex].
In this case:
number of moles of solute: 0.080 molesvolume= 850 mL= 0.850 LReplacing:
[tex]Molarity=\frac{0.080 moles}{0.850 L}[/tex]
Solving:
Molarity= 0.094 [tex]\frac{moles}{liter}[/tex]
The molarity of the solution is 0.094 [tex]\frac{moles}{liter}[/tex]
What is the molecular weight (rmm) of NaOH?
40
20
50
60
Answer: A/40 it is actually 39.997 but since that is not an answer they rounded up
Explanation:
4.60 mL of 0.1852 M HNO3 is titrated to the phenolphthalein indicator endpoint with 27.35 mL of a KOH solution. What is the molarity of the KOH solution
Answer:
[tex]M_{base}=0.0311M[/tex]
Explanation:
Hello there!
In this case, according to the given information, it turns out possible for us to solve for the molarity of the KOH solution by knowing this base react in a 1:1 mole ratio with nitric acid, HNO3; thus, we can write the following equation, as their moles are the same at the endpoint:
[tex]n_{acid}=n_{base}[/tex]
Which in terms of molarities and volumes is:
[tex]M_{acid}V_{acid}=M_{base}V_{base}[/tex]
Thus, we solve for the molarity of the base (KOH) to obtain:
[tex]M_{base}=\frac{M_{acid}V_{acid}}{V_{base}} \\\\M_{base}=\frac{4.60mL*0.1852M}{27.35mL}\\\\M_{base}=0.0311M[/tex]
Regards!
PLS HELP NO LINKS PLS
Fill in the blank. One chlorine atom from one molecule of chlorofluorocarbon can destroy up to _____ ozone molecules.
100
100,000
10,000
50
Answer:
100,000 Ozone Molecules
Explanation:
I just found this online calculator that got the answer.
Answer:
100,000 is correct
Explanation:
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
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 solution A was mixed with solution B, the solution turned cloudy, the test tube did not feel warm, and there were no visible bubbles. Identify the reaction type.Group of answer choicesprecipitationgas evolvingneutralizationno reactioncombustion
Answer:
Precipitation reaction
Explanation:
Given that solution A was mixed with solution B, the solution turned cloudy. The test is not warm and no bubbles visible. This means that the precipiate is formed.
The concept is when two colourless solutions react to form a cloudy precipitate that settles at bottom of a solution then the reaction is said to be a precipitation reaction.
An example can be the Reaction of Silver nitrate with common salt.
HELP POGGERS!!! I NEED HELP!!!!!!!!!! THIS IS NEEDED IN 10 MINS
Answer:
(3)
Explanation:
Guaranteed. Look at my comment for linked picture explanation!
2. Calculate the mass (m) of the hydrated calcium chloride CaCl2.6H20.
Answer:
Explanation:Ca=40
Cl=35.5
cacl2.2h2o=147
2h2o=36
36/147=0.245%
Helpppp i need da right answer Don’t Guess
Answer:
2.8 kg = 2.8 x 10^6 mg
Explanation:
Multiply the value in kilograms by the conversion factor (1000000) otherwise known as 10^6
So, 2.8 kilograms = 2.8 x 1000000 = 2.8 x 10^6 or 2800000 miligrams
Which effects would many organisms likely experience if global warming occurs? Check all that apply.
disrupted food webs
increased competition
increased number of glaciers
disrupted life-cycle events
forced relocation
and any MHA fan to
Answer:
Disrupted food webs
increased competition
disrupted life-cycle events
forced relocation
Explanation:
Global warming refers to a gradual rise in the temperature of the earth due to the increase in the concentration of greenhouse gases in the atmosphere which trap infrared radiation close to the earth.
This gradual increase in the temperature of the earth often have devastating effects on the lives of various organisms on earth. These effects include;
Disrupted food webs
increased competition
disrupted life-cycle events
forced relocation
Due to changes that occur in the ecosystem as a result of global warming, many species may be compelled to relocate from place to place. This in turn disrupts food webs and may lead to disruption of life cycle events of the concerned organisms. Decrease in the number of certain populations due to global warming may lead to increased competition among species for food.
based on the graph below, which statement
Answer:
4. Atmospheric pressure decreases as altitude increases.
Explanation:
hope this helps and is right. p.s i really need brainliest :)
Why should acids be stored
only glass
in
containers
Answer:
Acids are typically stored in glass containers because some acids will destroy plastics or react with them forming inedible products as these plastics are modified petroleum products and hence, corrode the plastic vessels easily. Glass on the other hand is not corroded by these acids so they are a good option.
Explanation:
Thus, acids are carefully stored in glass containers due to their chemical inertness towards the acid because of which glass does not react chemically with most of the aqueous substances like acids. Glass containers are non-porous, which means they do not absorb or contaminate acids anyhow and keep them preserved.
An electromagnetic wave has a wavelength of 4000 meters. What is this wave length and scientific notation?
A. 4.0 x 10-3 m
B. 4.0 x 10 3 m
C. 4.0 x 10 2 m
D. 4.0 x 10-2 m
Answer:
Wavelength of electromagnetic wave = 4.0 × 10³
Explanation:
Given:
Wavelength of electromagnetic wave = 4000 meter
Find:
Write, Wavelength of electromagnetic wave into scientific notation
Computation:
Wavelength of electromagnetic wave = 4000 meter
Wavelength of electromagnetic wave = 4.0 × 1,000 meter
Wavelength of electromagnetic wave = 4.0 × 10³
So,
Option "B" is the correct answer to the following question.
In an exothermic reaction, will increasing or decreasing the reactant cause the reaction to shift towards the product?
thank you :)
Is AgNO 3 +NaCl AgCl+NaNO 3 a decomposition reaction
how many moles are in 0.14g of Nitrogen, N2?
Answer:
0.01 moles
Explanation:
14 g contains 1 mole
0.14g contains> (0.14*1)/14
= 0.01 moles
Identify which reactants is reduced and which is oxidized .
2Au^3+(aq) + 3Cd(s) -> 2au(s) + 3Cd^2+(s)
Please help
Answer:
CD is oxidised
and
Au is reduced
hope helps u
2. How did the Activator affect the mixture?
Answer:
Activator effects a mixture if you put to much of the activator your using into a product or thing you are using.
Explanation:
For ex.
If you poor to much activator into slime it will make the slime hard and very wet it will ruin your slime completely so you will have to do it just right but start off pouring it slowly and mix and then more if it needs more.
Como Representar la distribución electrónica por el método de la escalera y con los cajones de la distribución eléctronica: En "s" máximo 2 electrones En "p" máximo 6 electrones En "d" máximo 10 electrones
Answer:
Como Representar la distribución electrónica por el método de la escalera y con los cajones de la distribución eléctronica: En "s" máximo 2 electrones En "p" máximo 6 electrones En "d" máximo 10 electrones
Explanation:
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what is oxidation of carbon compounds write the equation of these and name the oxidising agent used here
Answer:
It is equal
Explanation:
It is equal because there is the same amount of both and the measurment is correct.
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
What is the pOH of a solution of pH 3 acid? (Kw= 1.0 x 10-14)
Answer:
pOH = 11
Explanation:
The pH is an unit of concentration widely used in chemistry to find the quality of a solution.
To solve this question we must, as first, find the [H+] using the pH:
[H+] = 10^-pH
[H+] = 10^-3
Now, using kw:
kw = 1.0x10-14 = [H+] [OH-]
1.0x10-14 = [10^-3] [OH-]
[OH-] = 1.0x10-11
pOH = -log [OH-]
pOH = 11Lower alcohols like methanol burn with a blue flame to form carbon dioxide and water in the presence of atmosphere oxygen. Such a type of reaction is called
A. oxidation
B. combustion
C. dehydration
D. esterfication
Answer:
oxygen
Explanation:
combustion esterfication
The gas left in a hairspray can is at a pressure of 121.2kPa at 25.0°C. If this can is thrown into a fire, what will be the resulting pressure if the fire reaches 2,111°C
Answer:
969.6 kPa
Explanation:
Applying,
P/T = P'/T'..................... Equation 1
Where P = Initial pressure of the gas, T = Initial temperature of the gas, P' = Final pressure of the gas, T' = Final temperature of the gas
make P' the subject of the equation
P' = PT'/T................. Equation 2
From the question,
Given: P = 121.2 kPa, T' = 2111°C = (273+2111) = 2384 K, T = 25°C = (273+25) K = 298 K
Substitute these values into equation 2
P' = (121.2×2384)298
P' = 969.6 kPa
Is this an alpha or beta decay?
Fe2O3 + 3 Mg --> 2 Fe + 3 MgO reaction type
Answer: I'm not sure what answer to give you since there are no answer choices, but here is what I got.
Explanation:
Mg is a reducing agent, Fe 2O 3 is an oxidizing agent.
Igniting a mixture of Fe2O3 and Al with a magnesium ribbon fuse produces molten iron and aluminum oxide in an impressive exothermic reaction.
Hope this helped a little:(
There is an average of ______ inches of rainfall a year.
50-65 inches
20-35 inches
10-20 inches
35-50 inches
The average rainfall varies from place to place. However, the average rainfall is about 10-20 inches.
What is rainfall?Rain fall refers to a situation in which the water that is found at the surface of the earth is evaporated, condenses in the atmosphere and then falls again to the surface of the earth as precipitation or rainfall. It is an essential component of the water cycle.
We know that the average rainfall varies from place to place. However, the average rainfall is about 10-20 inches.
Learmn more about rainfall: https://brainly.com/question/11739819?
What is corrosion and how to avoid the process of corrosion?
Answer:
Three things are necessary for corrosion to occur: an electrolyte, an exposed metal surface, and an electron acceptor. Corrosion can be prevented by removing one of these conditions. Coating a metal surface with paint or enamel provides a barrier between the metal and the moisture in the environment.