Answer:
The acid will absolutely remove the hard water deposits that are trapping the stains. The longer it soaks, the less you have to scrub. It works for hard water stains, limescale, and rust!
hope it help
_______ in saliva start the chemical digestion process
Answer:
amylase
Explanation:
Select the correct answer. Which of the below is an example of mimicry that enables prey species avoid predation
What are the answers? I assume you meant to attach a photo.
Answer:
Thus, the one that is an example of mimicry that enables prey species to avoid predation is a harmless organism imitating the look of a harmful one (option B).
Explanation:
Can someone help me with this. Thank you
Answer:
Location x is experiencing daytime because it is facing directly to the sun.
Explanation:
From a background understanding of the solar system, the side of the planet facing the sun will be experiencing daytime while the other side of the planet will be experiencing either partial or total darkness depending on the location.
From the diagram given above, we can see clearly that location x is facing the sun and as such, light rays from the sun lightens the location. When this happens, location x will be experiencing daytime.
In conclusion, location x is experiencing daytime because it is facing directly to the sun.
Based on the kinetic molecular theory, which of the following statements is correct about the particles in a sample of gas at a constant temperature and volume?
They attract each other with strong forces.
Their net kinetic energy decreases due to collisions.
They have negligible kinetic energy.
There is a lot of empty space between them.
Answer:
my sources say that there is a lot of empty space between then
Explanation:
their forces to attract each other is not strong
kinetic energy is always high in gasses
The magnetic field is stronger away from the magnet true or false
Answer:
Big False
Explanation:
As the magnets get closer, the stronger the magnetic field. The farther away, the less strength the field exhibits.
(HELP) What were the main themes of the Arab poems?
Answer:
chivalry and the romance of nomadic life. the life of Muhammad. a strict adherence to religious themes.
Explanation:
Sorry if its wrong
How many milliliters of 3.0 M H2SO4 are needed to make 450 mL of 0.10 M H2SO4?
how is hydroxyl group of alcohol different from the hydroxyl group of alkalis ?
Answer:
Difference between hydroxyl group of alcohol and hydroxyl group of alkalis is as following: Hydroxyl group of alcohol is composed of carbon, oxygen and hydrogen atoms while hydroxyl group of alkalis composed of one alkali group, hydrogen and oxygen atom.
A sealed balloon occupies a volume of 250 mL at an unknown temperature. When the temperature is altered to 30 C, the balloon's volume becomes 0.5 L. Calculate the initial temperature of the air in the balloon.
Answer:
Initial temperature, T1 = 15°C
Explanation:
Given the following data;
Initial volume, V1 = 250 mL to Liters = 250/1000 = 0.25 L
Final temperature, T2 = 30°C
Final volume, V2 = 0.5 L
To find the initial temperature T1, we would use Charles' law.
Charles states that when the pressure of an ideal gas is kept constant, the volume of the gas is directly proportional to the absolute temperature of the gas.
Mathematically, Charles is given by;
[tex] \frac {V}{T} = K[/tex]
[tex] \frac{V1}{T1} = \frac{V2}{T2}[/tex]
Making T1 the subject of formula, we have;
[tex] T_{1}= \frac{V_{1}}{V_{2}} * T_{2}[/tex]
Substituting into the formula, we have;
[tex] T_{1}= \frac{0.25}{0.5} * 30[/tex]
[tex] T_{1}= 0.5 * 30 [/tex]
Initial temperature, T1 = 15°C
What coefficient should go in front of LiOH when the reaction is correctly balanced? Fe(OH)3 + Li2S --> LiOH + Fe2S3
Answer:
6
Explanation:
Balancing a chemical equation involves making sure that the number of atoms of each element on the reactant side is equal to that on the product side. For example, if there are 5 moles of carbon on the reactant side, there must be 5 moles of carbon on the product side. This is in accordance to the law of conservation of mass.
However, to do the above, we make use of coefficients i.e whole numbers placed behind the elements. According to this question, an unbalanced chemical reaction is given as follows:
Fe(OH)3 + Li2S → LiOH + Fe2S3
As observed, the number of atoms on each side of the reaction are unequal. Hence, coefficients are used to balance the equation as follows:
2Fe(OH)3 + 3Li2S → 6LiOH + Fe2S3
From the balanced equation, 6 is used as a coefficient in front of LiOH.
Assume that a disease has caused a dramatic decrease in the population of phytoplankton. How will this decrease affect the food web? help 20 points
Answer:
Because phytoplankton are near the bottom of the food chain, it would cause a domino affect where all of the higher levels are impacted. We could expect to see a decreased amount of organisms that eat the plankton and an increased competition for food.
Explanation:
Answer:
Phytoplankton converts energy from the Sun into usable energy that fuels the rest of the food web. So, the higher levels of the food web won’t be able to sustain themselves if the population of phytoplankton decreases.
help please asap if your good at chemistry
what is Ammonia Conductivity in Solution?
a.light bulb shines brightly
b.light bulb shines dimly
c.light bulb doesn't shine
and explain why you chose that answer.
Answer:
you siad i can answer with anything :)
Which of the following body responses help maintain homeostasis by
decreasing body temperature?
A. Shivering
B. Decreasing blood flow to the skin
C. Sweating
D. Lying down
Answer: Hewo, there! your answer is Below
C. Sweating Would be the correct answer,
Explanation:
it sends signals to your sweat glands to make you sweat and cool you off. When the hypothalamus senses that you're too cold, it sends signals to your muscles that make your shiver and create warmth. This is called maintaining homeostasis.
Hope this helps you!!
Have a great day!!
Answer:
Which of the following body responses help maintain homeostasis by decreasing body temperature is? I want to say Sweating
Explanation:
But read this before answering to make sure. See what you think. This is what I found
what are the reactants in the first word equation above. magnesium+hydrochloric acid ⇒ magnesium chloride + hydrogen
Answer:
magnesium+ hydrochloric acid is the reactants
Explanation:
the reactants are always in the left and the products are always in the right by
magnesium+hydrochloric acid ⇒ magnesium chloride + hydrogen
by combining magnesium and hydrochloric acid it produces magnesium chloride and hydrogen.
hope this helps..
Can someone help me thank you. I have to look at each picture and determine if the circuits shown are series circuits or parallel circuits. Explain how you know.
Answer:
I believe it may be-
1. Series
2. Parallel
3. Parallel
4. Series
Explanation:
In a series circuit, electricity only has one path to follow while a parallel circuit has more than one path to follow.
Please help me with 8,9,10,11
Answer:
8. The particles have the same volume in each container (not so sure about number 8 ) 9. Solid 10. Gas 11. Temperature and Pressure
how can a match light without a spark
Answer:
Use friction
Explanation:
Friction is the force that stops something in motion. It also heats up something, creating a gravitational heat! A match striked against the lighter will create a flame, because of friction :)
What gas will make a flame pop then go out
Answer:
Hydrogen Gas
Explanation:
The hydrogen gas now in the test tube is flammable. So when I hold the tube over the flame, the hydrogen gas ignites and creates a popping sound. It is like a tiny bomb or fireworks.
Hope this helped! :)
Explain the relationship between the following terms: eutrophication, nutrients, dissolved oxygen leads, and algae.
Answer:
Eutrophication is the enrichment of a body of water with excessive nutrients (nitrogen and phosphorus), which causes algal growth and subsequent decline of dissolved oxygen after decomposition.
A woman weighing 600 N is leaning on the ground with shoe soles with a total area of 0.04 m2. Calculate the pressure of the motors
Answer:
1.5×10^4
Explanation:
Pressure= force/area
P= 600/0.04
P= 15000
P= 1.5×10^4
How many molecules are in 0.73 mol of C12H22011? *
Answer:
C12h22o11 moles to grams
1 mole is equal to 1 moles C12H22O11, or 342.29648 grams.
hope this helps
Explanation:
Which explanation correctly describes why it is important for a cell’s surface-area-to-volume ratio to not be too small?
A. The area of the cell membrane needs to be large in comparison to the volume so the cell is able to move nutrients and wastes through it.
B. The cell would starve.
C. The cell would not produce enough waste material.
D. The organelles would grow too large to fit within the cell.
find the number of neutron electron and proton in the nuclide 18.Ar40
Answer: The number of neutron electron and proton in the nuclide [tex]_{18}^{40}\textrm {Ar}[/tex] is 22, 18 and 18.
Explanation:
Atomic number is equal to the number of protons or number of electrons for a neutral species and is specific to a particular element.
Mass number is the sum of number of protons and the number of neutrons.
Here the atomic number of Argon is 18 , thus the number of protons is 18 and thus the number of electrons is also 18.
The given mass number is 40. Thus number of neutrons = (40 - 18) = 22.
The number of neutron electron and proton in the nuclide [tex]_{18}^{40}\textrm {Ar}[/tex] is 22, 18 and 18.
3Li HPO
How many elements?
How many Atoms of Lithium (Li)?
How many Atoms of Hydrogen (H)?
How many Atoms of Phosphorus (P)?
How many Atoms of Oxygen (0)?
How many total Atoms in this Chemical Formula?
1 2 3 4 5
Answer:
1) There are Four Elements
Li , H , P , O
2) Li have 3 atoms.
3) H have 3 atoms.
4) P have 3 atoms.
5) O have 3 atoms.
A beaker contains 1.0 M NaOH(aq) solution. To produce a NaOH(aq) solution of molar concentration 0.20 M, we transfer 2.0 ml (cm^3) out of this beaker into a 25 ml cylinder and add distilled water until the total volume reading becomes
A) 12ml
B)10ml
C)8ml
D)5ml
E)2ml
Answer: B) 10 ml
Explanation:
According to the dilution law,
[tex]M_1V_1=M_2V_2[/tex]
where,
[tex]M_1[/tex] = molarity of stock [tex]NaOH[/tex] solution = 1.0 M
[tex]V_1[/tex] = volume of stock [tex]NaOH[/tex] solution = 2.0 ml
[tex]M_1[/tex] = molarity of dilute [tex]NaOH[/tex] solution = 0.20 M
[tex]V_1[/tex] = volume of diluted [tex]NaOH[/tex] solution = ?
Putting in the values we get:
[tex]1.0\times 2.0=0.20\times V_2[/tex]
[tex]V_2=10ml[/tex]
Therefore, final volume reading is 10 ml
Litmus turns
in acidic solutions.
green
yellow
blue
red
Answer:
red
Explanation:
red shows if solution is acidic
Consider the titration of 82.0 mL of 0.140 M Ba(OH)2 by 0.560 M HCl. Calculate the pH of the resulting solution after the following volumes of HCl have been added. (a) 0.0 mL WebAssign will check your answer for the correct number of significant figures. 13.447 Correct: Your answer is correct. (b) 15.0 mL WebAssign will check your answer for the correct number of significant figures. 12.25 Incorrect: Your answer is incorrect.
Answer:
a) pH = 13.447
b) pH = 13.176
Explanation:
Ba (OH)₂ is a strong base and ionizes completely in solution to give barium amend hydroxide ions.
The equation of the dissociation of Ba(OH)₂ is given below:
Ba(OH)₂ ----> Ba2+ + 2OH-
1 mole of Ba(OH)₂ produces 2 Moles of OH- ions
a) Before the addition of HCl, i.e.,when 0.00 mL of HCl has been added;
Concentration of hydroxide ions, [OH-] = 0.140 x 2 = 0.a) [OH-] = 0.100 x 2 = 0.280
pOH = -log [OH-]
pOH = -log (0.280)
pOH = 0.553
pH = 14 - 0.553= 13.447
b) pH when 15.0 mL HCl has been added
Moles Ba(OH)₂ = concentration × volume
Volume of Ba(OH)₂ = 82.0 mL = 0.082 L, concentration = 0.140 M
moles of Ba(OH)₂ = 0.082 x 0.140 = 0.01148 moles
moles OH- produced by 0.01148 moles of Ba(OH)₂ = 2 x 0.01148= 0.02296
moles HCl = 0.0150 L x 0.560 = 0.0084
moles of H+ produced by 0.0084 HCl = 0.0084
0.0084 H+ willnreact with 0.0084 moles of OH-
moles OH- left after the reaction = 0.02296 - 0.0084 = 0.01456 moles
total volume of new solution = (82 +15) mL = 97 mL => 0.097 L
Concentration of OH- ions = moles / volume
[OH-] = 0.01456 / 0.097 = 0.1501
pOH = -log [OH-]
pOH = -log (0.150)
pOH = 0.824
pH = 14 - 0.824
pH = 13.176
Butters can jump 5.5 feet. How many inches can he jump? (12 in = 1 ft)
Answer:66
Explanation:
5.5 feet is 66 inches
Answer:
66 inches
Explanation:
(12 in = 1 ft)
5.5 ft x 12 inches = 66 inches
Which of the following best defines a spectrum?
A. The range of values of some property
B. The measurement of some property
C. A single value of some property
D. The change over time in the value of some property
SUBMIT
Answer:
The range of values of some property
Explanation:
A.pex, and the comments on the other answer
The best defines a spectrum is The range of values of some.
What is spectrum ?
A spectrum (plural spectra or spectrums) is a condition that is not limited to a specific set of values but can vary, without gaps, across a continuum. The word was first used scientifically in optics to describe the rainbow of colors in visible light after passing through a prism. As scientific understanding of light advanced, it came to apply to the entire electromagnetic spectrum. It thereby became a mapping of a range of magnitudes (wavelengths) to a range of qualities, which are the perceived "colors of the rainbow" and other properties which correspond to wavelengths that lie outside of the visible light spectrum.
Spectrum has since been applied by analogy to topics outside optics. Thus, one might talk about the "spectrum of political opinion", or the "spectrum of activity" of a drug, or the "autism spectrum". In these uses, values within a spectrum may not be associated with precisely quantifiable numbers or definitions. Such uses imply a broad range of conditions or behaviors grouped together and studied under a single title for ease of discussion. Nonscientific uses of the term spectrum are sometimes misleading. For instance, a single left–right spectrum of political opinion does not capture the full range of people's political beliefs. Political scientists use a variety of biaxial and multiaxial systems to more accurately characterize political opinion.
Learn more about spectrum
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What three numbers are always the same?
Mass Number, Protons, Neutrons
Atomic Number, Protons, Electrons
Protons, Neutrons, Mass Number
Protons, Neutrons, Electrons