Explanation:
Neo mixes 600ml of black paint with white paint in order to get a gray paint. he think the colour came out too dark ,so that decreases the amount of black paint in the ratio 7:12. Calculate how much black paint it would be
Answer:true
Explanation:
because its just true
Determine the volume of 4. 69 moles of an ideal gas at STP
Explanation:
[tex]4.69mol \times \frac{22.4lit}{1mol} = 105.056lit[/tex]
A particle-level diagram of a metallic element is shown above. Typically, metals are both malleable and ductile. The best explanation for these properties is that the electrons involved in bonding among metal atoms are:.
The best explanation for these properties is that the electrons involved in bonding among metal atoms are valence electrons as per the characteristics of metals.
An element is the simplest form of matter.Elements are further classified as metal,non -metals and metalloids. Metals possess luster and are malleable that is they can be drawn into thin sheets.They are also ductile and can be drawn into thin wires and are hard due to the strong ionic bonding present in them.
The unique characteristics of metals are due to the presence of valence electrons present in their atoms.
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Sodium and potassium ions do not diffuse in equal numbers through ligand-gated cation channels. Why?.
Answer:
The inside surface of the sarcolemma is negatively charged compared to the outside surface. Sodium ions diffuse inward along favorable chemical and electrical gradients.
Explanation:
Pls, choose me as brainliest!
why. air and gas is different?.20pnts five reason.
Answer:
The air we breathe is primarily made of oxygen, and gases contain primarily nitrogen.
Explanation:
The removal of oxygen from a substance is known as what?
Answer:
Reduction
Explanation:
An easy thing to remember is:
Oxidation= adding oxygen
Reduction= taking away oxygen
Reduction (reduce)
Explain why there is a problem in the disposal of polymers such as poly(chloroethene)
Most polymers, including poly(ethene) and poly(propene) are not biodegradable . This means that microorganisms cannot break them down, so they: cause a litter problem if disposed of carelessly. last for many years in landfill sites.
If 4.0 mL of a 3.0 M HCl solution is exactly neutralized by a 3.0 mL sample of NaOH, then what is the concentration of the NaOH solution?
Answer:
B. 4.0
Explanation:
Which of the following is a correct procedure for the operation of a microscope?
A.
First, put the specimen into focus using a low power lens, then switch to a higher power lens, if needed.
B.
Remove and add slides while the high power lens is selected.
C.
Use the fine focus knob with the low power lens and use the coarse focus knob with the high power lens.
Suppose that 20.0 mL of 0.010 M Ca(OH)2 is required to neutralize 12.0 mL of aqueous HCl solution. What is the molarity of the HCl solution
The molarity of the 12 mL HCl solution needed to neutralise 20 mL 0.010 M Ca(OH)₂ solution is 0.033 M
Balanced equation2HCl + Ca(OH)₂ —> CaCl₂ + 2H₂O
From the balanced equation above,
The mole ratio of the acid, HCl (nA) = 2
The mole ratio of the base, Ca(OH)₂ (nB) = 1
How to determine the molarity of HCl Volume of acid, HCl (Va) = 12 mL Volume of base, Ca(OH)₂ (Vb) = 20 mLMolarity of base, Ca(OH)₂ (Mb) = 0.01 MMolarity of acid, HCl (Ma) =?MaVa / MbVb = nA / nB
(Ma × 12) / (0.01 × 20) = 2
(Ma × 12) / 0.2 = 2
Cross multiply
Ma × 12 = 0.2 × 2
Ma × 12 = 0.4
Divide both side by 12
Ma = 0.4 / 12
Ma = 0.033 M
Thus, the molarity of the HCl solution is 0.033 M
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How do you make condensation on glass?
Answer:
Condensation forms when water vapor condenses into a liquid. The surface of the glass inside your windows cools below the dew-point of the surrounding air. Buy a dehumidifier. Dehumidifiers remove moisture from the air and keep moisture off of your windows.
Explanation:
a. correctly write the formula for the reactants and products
b. predict the type of reaction
Answer:
[tex]Cu(NO_{3} )_{2} + 2NaOH = Cu(OH)_{2} + 2NaNO_{3}[/tex]Double displacement reactionExplanation:
A double displacement reaction is a reaction in which exchange of ions takes place
Sodium in sodium hydroxide displaced copper in copper(II)nitrate to form sodium nitrate and copper replaced sodium to form copper(II)hydroxide
In fractional distillation, the number of carbons in the various components produced
1. stay the same throughout the distillation tower
2. increase as the vapours move up the distillation tower
3. decrease as the vapours move up the distillation tower
4. increase then decrease as the vapours move up the distillation tower
Answer:
No. Gasoline and diesel fuel is. Steel is an alloy of iron, carbon, and various other metals- but it is not distilled.
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Which of the following metals does not react even with steam.?
A. Silver
B. Iron
C. Calcium
D. Sodium
Explanation:
it's silver
it doesn't react w steam
If the solution containing the metal complex ion is made acidic, why will the silver chloride precipitate
Answer,
For example, silver ion can be precipitated with hydrochloric acid to yield solid silver chloride. Because many cations will not react with hydrochloric acid in this way, this simple reaction can be used to separate ions that form insoluble chlorides from those that do not.
Chemical molecules that impart positional information through their concentration gradient are called
Chemical molecules that impart positional information through their concentration gradient are called morphogens.
What are morphogens?
In cells of living organisms, positional information are transported through changes in the concentration gradient of morphogens.
The presence of morphogens in a tissue helps to monitor the pattern of development of that tissue.
This chemical molecule embryology because it imparts the positional information of an embryo resulting to cells differentiating at specific positions.
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Those molecules that we can glean information about their position via concentration gradient are called morphogens.
What is concentration gradient?The term concentration gradient refers to the difference in the amount of substance on two different sides. This gradient could be used to glean useful information about the molecule position.
Chemical molecules that impart positional information through their concentration gradient are called morphogens.
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How do tallgrass, mixed grass, and short grass prairies differ from savannas?The prairies receive less rainfall than savannas. The prairies are temperate grasslands, and savannas are tropical grasslands. The prairies are tropical grasslands, and savannas are temperate grasslands. The prairies receive more rainfall than savannas
Answer:
The prairies are temperate grasslands, and savannas are tropical grasslands (Option D). It is the most important difference between both biomes.
Explanation: brainiest maybe?
What happens at a convergent boundary?
A. Two tectonic plates are combined to form a single plate.
B. Two tectonic plates are pulled away from each other.
C. Two tectonic plates move past each other horizontally.
D. Two tectonic plates push against each other.
who wants to be a doctor
Answer:
maybe, but id rather do automotive stuff, thats my second option.
Explanation:
Can please post the answers for 1-5 of Use the Mole Quick Check
1. The atomic mass unit is equivalent to 1/12 of the mass of a neutral atom of which element? (1 point)
Answer:
carbon-12
Explanation:
One atomic mass unit is defined as a mass exactly equal to one-twelfth the mass of one carbon-12 atom. Carbon-12 is the carbon isotope that has six protons and six neutrons.A single atom's atomic mass is just its total mass, which is usually given in atomic mass units, or amu. An atom of carbon with six neutrons, carbon-12, has an atomic mass of 12 amu by definition.An atomic mass unit (abbreviated as AMU or amu) is defined as 1/12 the mass of a carbon-12 atom. The nucleus of the carbon-12 (C-12) atom contains six protons and six neutrons. One AMU is the average of the proton and neutron rest masses, in approximate words.This equates to about 1.67377 x 10 -27 kilogram (kg) or 1.67377 x 10 -24 gram (g). In AMU, an atom's mass is generally equal to the nucleus' total amount of protons and neutrons.The AMU is used to express and differentiate between various isotopes of elements by expressing their relative masses. Thus, uranium-235 (U-235) has an AMU of roughly 235, but uranium-238 (U-238) has a little higher AMU. The disparity is due to the fact that U-238, the most common naturally occurring uranium isotope, contains three more neutrons than U-235, which has been utilized in nuclear reactors and atomic bombs.How can the ocean floor be created and/or destroyed?
Answer:
The ocean floor can be created by plates shifting on the ocean floor, such as subduction or sea-floor spreading. It can also be destroyed by earthquakes or volcanoes.
Explanation:
11. How many moles of oxygen are produced when 5 moles of potassium chlorate(V)
decomposes completely?
2KCIO3 → 2KCl + 302
Answer:
The answer would be 4.5 moles of O2
Please help I need to draw and label a atom that has 7 protons and 8 neutrons!!!! I will give a brainly
Answer:
Oxygen
Explanation:
Given the following question:
The following atom has 7 protons (plus charge)
The following atom has 8 neutrons (negative charge)
The following atom has 7 electrons since the number of electrons are equal to the number of protons the atom has.
The following atom is oxygen with a mass number of 16: (see photo below)
Let the red represent protons...
Let the gray represent the neutrons...
Let the blue represent the electrons...
Hope this helps.
Where do bubbles come from when something is boiling? Why do you think that is ?
Answer:
The molecules of the substance collide more aggressively because of the heat
Answer:
It's because the heat is making the water rise and it makes water vapor. I think it's because when the heats warms up, the water warms up as the heat warms up.
Explanation:
hope this helps : )
Calculate the molarity of 0.5 moles NaHCO3
in 5,314 mL of solution.
How do I solve this?
Answer: 0.094 M
Explanation:
HELP ASAP WILL MARK BRAINLIEST!! Copper reacts with sulfur to form copper (I) sulfide, according to the balanced equation below. 2Cu S → Cu2S Given that there are 40. 2 g Cu and 14. 1 g S, complete the steps below to determine the limiting and excess reactants in the last question. How many moles are in 40. 2 g Cu? mol Cu How many moles are in 14. 1 g S? mol S.
Answer:0.633 and 0.440
Explanation:
Answer:
Explanation:
0.633 and 0.440
For the next one, it is
Copper and sulfur
Your welcome
Write a few sentences about respiration
Answer:
reluctantly she pulled away, her pulse and respiration in a race.
its function is less that of respiration that of FIG.
the least wind raises clouds of fine dust, which fill the air, render it so opaque as to obscure the noonday sun, and make respiration difficult.
Which color will the solution most likely become?
Answer:
colorless
Explanation:
The ferric ion reacts with the thiocyanate, which reduces the concentration of Thiocyanate.
Answer:
I dont remember this answer but I do believe it's colorless
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When carrying out a liquid-liquid extraction using a separatory funnel, Group of answer choices the bottom layer, which always contains the organic product, is always removed first. the organic layer must always be dried with an anhydrous salt like MgSO4. separation of layers is most efficient when the separatory funnel is drained with the top on. the top layer is always removed first with a disposable pipet.
When carrying out a liquid-liquid extraction using a separatory funnel the organic layer must always be dried with an anhydrous salt like MgSO4.
What is Liquid-liquid extraction?This is defined as a method of separation of compounds based on their relative solubilities in two different immiscible liquids.
The organic layer must always be dried with an anhydrous salt like MgSO4 to remove the water content for a more accurate result.
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Convert 3.50 mm to m. Report your answer to the appropriate number of significant figures. 1 m= 1000 mm
Answer:
0.0035
Explanation:
3.5 millimetres = 0.0035 meters
Answer:
0.0035 m
Explanation:
since 1000 mm is equal to 1 m
then 3.50 mm will be equal to lets say x
1000 mm = 1 m
3.50 mm = x m
cross multiply
1000 × x = 3.50 × 1
divide both sides by 1000
x = 3.50/1000
x= 0.0035 m
Scandium oxide is insoluble in water. Describe how you could show that it is an amphoteric oxide
Answer:
If it can react with acid as well as a base then the compound is said to be amphoteric
Explanation:
Answer:
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