⇒ 0.018
-use pH=-log[H3O+]
-solve for H3O+
What is the unbalanced and balanced equation of elephant's toothpaste!? PLEASE HELP!!
Answer:
2 H2O(g) + O2(g)
2 O-1 → O20 + 2 e- 4.
Explanation:
Essentially elephant's toothpaste is just the decomposition of H2O2, hydrogen peroxide. It's catalyzed by KMnO4
Balanced Equation: [tex]2H_2O_2 \ -- > \ 2H_2O \ + \ O_2_[/tex]
Unbalanced Equation: [tex]H_2O_2 \ -- > \ H_2O \ + \ O_2[/tex]
How do you think the light would travel if the laser pointer was 1000 meters away?
It is entirely dependent on the laser power (mW). The light's divergence is affected by it.
What exactly is a laser?A laser is a device that produces a powerful beam of coherent monochromatic light by stimulating the emission of photons from excited atoms or molecules.
A laser is generated when electrons in optical materials such as glass, crystal, or gas absorb energy from an electrical current or light.
We can see a 5mW 650 nm laser glowing on a white surface in full darkness from 500 to 1 kilometer away.
As a result of the divergence, the predicted dot 1 km away will be a massive dot with a diameter of 20–30 m30 m and will be exceedingly dark.
As a result, it is entirely dependent on the laser.
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PLEASE HELP I NEED ANSWER ASAP
Mark the oxidation nos
Co=0Cu=2+Then
Co=2+Cu=0Gain of electron is reduction
Copper is reduced .
Option D
Answer asapppp plssss!!!
consider the sample sds for hydrochloric acid and answer the questions,
what type of environment should the hydrochloric acid be stored in? check all that apply
1.)in a beaker
2.)in a cool, well-ventilated area
3.)in a flask
4.)in a tightly closed container
The safety data sheet is used while working in a laboratory and handling chemicals. According to SDS, hydrochloric acid should be stored in a cool, well-ventilated area. Thus, option 2 is correct.
What is hydrochloric acid?Hydrochloric acid has been defined as a strong acid that is liquid formed by the two elements, hydrogen gas, and chloride. Because of their corrosive nature and high reactivity they are recommended to be stored in dark-colored glass bottles.
They should be stored in a cool and well-ventilated area as they can easily react with other metals, alkalis, oxidizing agents, etc. The reaction results in heat formation and gaseous vapors that are harmful when coming in contact.
Therefore, option 2. hydrochloric acid should be stored in dark and cool places.
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For the reaction: P4 + 6C12 – 4 PC13
What mass of PCl3 forms in the reaction of 75.0 g P4 with 275 g Cl2?
Answer:
332.3g
Explanation:
hope this helps loves x
why is it necessary to use clean sponge and cleaning rags in dishwashing?
Answer:
cloths/sponges can harbor harmful pathogens and spread germs if not cleaned frequently. A damp, smelly dish cloth/sponge is telling you germs are multiplying!
Explanation:
hope this is able to help you :)
For your experiment in part B, which factors would you keep constant?
Heating Different Amounts of a Substance
[Then mother noticed that two children who are watching the game are sick and coughing.She told her son to keep distance from those children to avoid getting sick]
1.Observe illustration no.1 and read the caption.Why did the mother ask her son to avoid the kid with cough?
2.Observe illustration no.2 and read the caption.Why did the mother let her son play with the kid with asthma?
please don't report this
Answer:
in illustration 1
the mother told her son not to play with the boy having cough because it is a transferable disease which could cause him also to get sick and would get cough.
while in
illustration 2
the mother let the boy play with the boy having asthma because it is not a transferable disease which wold not affect him or any one else.
Explanation:
this is the reason
#1
Cough is a infectious disease .It spreads through the droplets falling outwards during coughing.If her son stays there for long time he would be affected by cough also or he would get sick .So the mother denied .#2
Asthama is although a disease of lungs but it doesn't spread through air or droplets.It's not infectious .So nothing would happen if her child plays159
Which type of reaction is:
4 (NH4)3PO4 + 3 Pb(NO3)4 - 12 NH4NO3 + Pb3(PO4)4
Synthesis
Decomposition
Double Displacement
Single Displacement
Why have scientists changed their ideas on the model of the atom?
Answer:
Scientists used the model to make predictions. Sometimes the result of the experiments were a surprise and they did not fit with the existing model!
A reaction between an alcohol and an organic acid is classified as.
Answer:
esterification reaction ...........
Mix two liquids together and shake them up. You see that you have microscopic droplets of one liquid suspended in the other. You would call this:
Answer:
The awnser is cloudy suspension.
As the microscopic droplets of one liquid are suspended in the other, it is a heterogeneous mixtures.
What are heterogeneous mixtures?
Heterogenous mixtures is defined as a type of mixture where in the composition is not uniform throughout the mixture.It consists as two or more phases. The phases are chemically distinct from each other.
As there are two or more phases present in heterogenous mixtures they can be separated by solvent extraction where in one phase is miscible with the solvent and the other phase is immiscible.
Components of a heterogenous mixtures are distinctly visible . There are two types of heterogenous mixtures, the colloids and the suspensions.These two vary with each other with respect to particle size.These are the mixture which are easy to separate out.
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what are three different ways land is used as a resource
Can someone help me?
Answer: 0.160 M
Explanation:
balanced symbol equation for the following:
magnesium hydroxide + nitric acid → magnesium nitrate + water
[tex]\text{Mg(OH)}_2 + 2\text{HNO}_3 \rightarrow \text{Mg(NO}_3)_2+ 2\text{H}_2 \text{O}[/tex]
Give an example of these types of organisms predator scavenger and decomposer
Predator - Lions (any animal that preys upon other animals)
Scavenger - Vultures (any animal that consumes decaying flesh)
Decomposer - Worms/ Fungi (any organism that breaks down dead organisms into smaller particles and creates new compounds such as nutrients for plants)
Find the molarity of 194.55 g of sugar (c12h22o11) in 250. ml of water.
What is the name of the functional group that is attached to this hydrocarbon? a carbon atom is single bonded to o h to the right, and h below, left, and above. alkyl halide alcohol carbonyl ketone
The name of the functional group of the hydrocarbon that has a chemical formula of CH3OH is alcohol (OH). Details about alcohol can be found below.
What is a functional group?In chemistry, a functional group is a specific class of a group of compounds that determines the chemical properties of the group.
The hydrocarbon given in this question has the chemical formula of CH3OH is methanol. Methanol as the name implies has a functional group called alcohol.
Therefore, the name of the functional group of the hydrocarbon that has a chemical formula of CH3OH is alcohol (OH).
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What most likely happens when a liquid gains heat?
O it changes into gas
it changes into a solid
Onts temperature decreases
O its temperature remains constant
-Jewel Warren
it turns into a gas due to vaporization
Suppose a particular electron has only two allowed energy levels. How many different wavelength photons (spectral lines) would result from all electron 3 transitions between these levels
Energy levels are the fixed places from the nucleus to the electrons of the atoms. Three possible wavelength photons are possible from the transitional levels.
What are spectral lines?Spectral lines are the dark or light uniform spectrum caused by the surplus or insufficient photons in the atom. They absorb and emit light in a certain frequency range.
Photons are transmitted from one energy level to another level of lower energy, three transitions from levels 1 - 2, 1 - 3, and 2 - 3 are possible.
Therefore, 3 spectral lines are possible.
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the volume of gas collected when the temperature is 11.0c and the pressure is710.mmHg measures 0.148L. what is the calculated volume of the gas (in mL) at 20.0c and 740.mmHg?
Answer:
The calculated volume of the gas (in mL) at 20.0c and 740.mmHg when volume of gas collected at temperature of 11.0° C and pressure of 710 mmHg measures 0.148L is 78. 1 mL
Explanation:
The combined gas law combines the three gas laws, Boyle's law, Charles's law and Gay- Lussac's law. It states that the ratio of the product of pressure and volume and the absolute temperature of a gas is equal to a constant.
P V ÷ T = K
P1 × V1 ÷ T1 = P2× V2 ÷ T2
Parameters :
P1 = Initial pressure = 710.0 mmHg
V1 = 0. 148 L , converting it to mL = 0.148L × 1000 = 148 mL
T1 = Initial temperature = 11° C
P2 = Final pressure = 740 mmHg
V2 = Final volume in mL
T2 = Final temperature = 20° C
Calculations:
V2 = P1 × V1 × T2 ÷ P2 × T1
V2 = 710 × 148 × 11 ÷ 740 × 20
V2 = 1155880 ÷ 14800
V2 = 78.1 mL
Therefore, the calculated volume is 78.1 mL
how do energy sources poly a role in the rock formation?
Sun (radiation), winds (eolic) and water (hydraulic) are all sources of energy that work together during rock formation.
What is rock formation?The rock formation is a very slow process that occurs at a geological time, which may take millions of years.
During this period, rocks are shaped by different types of energy, especially radiation and erosion (wind and water bodies)
In conclusion, the sun (radiation), winds (eolic) and water (hydraulic) work together during rock formation.
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4. At least one carbon-carbon bond in an alkyne is a triple covalent bond. Other bonds may be single or double carbon-carbon bonds and carbon-hydrogen bonds.
Answer:
hope it helps cuz i did not really understand
short paragraph about volcano and its features.
Which of the following measurements has 4 significant figures?
800. g
800.0 g
832,000 g
8000 g
Answer:
The answer is option D.
Explanation:
Hope it helps!
Answer:
8000g
Explanation:
option D is the correct answer.
NEED HELP ASAP!
What is the frequency of a wave that has a wavelength of 28m? Remember that c = 2.998 x 10^8 m/s
A.) 10 Hz
B.) 1.07 x 10^7 Hz
C.) 10.7 Hz
D.) 2.3 x 10^7 Hz
Answer:
Frequency = Speed/wavelength
Frequency = 2.998 x 10^8 m/s ÷ 28m
Frequency = 1.07 x 10^7 Hz
12. Predict How much of a sample of radioisotope remains after one half-life? After two half-lives?
ANSWER:
3 4 of the original mass has decayed.
EXPLANATION:
After 1 half life, clearly HALF of the original isotope remains. And after TWO half-lives, a HALF + HALF of a HALF, i.e. 3 4 of the original mass has decayed.
Hope This Helped!!
15.a. Classify the following alkanes according to their increasing density. C₂Hs , C2H56, C11H24, C₂H6. C36H74
The order of alkanes according to their increasing density can be seen below:
C₂H5C₂H6C2H56C11H24C36H74What is Alkane?This is referred to a hydrocarbon with a single carbon to carbon bond and examples include butane etc.
Its density increases with increasing number of carbon and hydrogen atoms thereby making it the most appropriate choice.
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how many moles of O2 will react with 0.6482 moles of H2O?
2C3H6O + 5O2 → 6CO + 6H2O
Answer:
n=0.648 moles
the ratio 5:6
x:0.648
x=0.54 moles
what mass of Al w(molar mass 78g/mol) would have to be descomposed to produce 100 grams of Al203
Answer:
57.4 g
Explanation:
30.4 g Al will produce 57.4 g Al 2 O 3 30.4 g O 2 will produce 64.6 g Al
2 O 3 .The limiting reagent is aluminum, and the maximum amount of aluminum oxide that can be produced in this reaction is 57.4 g
