Answers
Answer:
A graph, luminosity, temperature, decreases
Explanation:
:)
Related Questions
Which of the following shows motion? *
1.a boy watching television
2.a mother going to market
3.a dog barking at strangers
4.pillows on bed
Answers
Answer:
3
Explanation:
motion means movement, none of the others show movement
Answer:
a mother going to market
Explanation:
going is a motion
Please help I need to draw and label a atom that has 7 protons and 8 neutrons!!!! I will give a brainly
Answers
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.
Using the phase diagram for H20, which of the following correctly describes
water at 100°C and 1 atm pressure?
O A. Gas
B. At the melting point
C. At the boiling point
D. Liquid
Answers
Answer:
i think it is c. At the boiling point
Explanation:
hope this helps
Answer:
PROOF ITS MELTING POINT
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)
Answers
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.What does it mean if you have a metallic taste in your mouth.
Answers
The removal of oxygen from a substance is known as what?
Answers
Answer:
Reduction
Explanation:
An easy thing to remember is:
Oxidation= adding oxygen
Reduction= taking away oxygen
Reduction (reduce)
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?
Answers
Answer:
B. 4.0
Explanation:
Write a paragraph (5-7 sentences) describing pH and conductivity.
Answers
Answer:
pH is a measure of hydrogen ion concentration, a measure of the acidity or alkalinity of a solution. The pH scale usually ranges from 0 to 14. Aqueous solutions at 25°C with a pH less than 7 are acidic, while those with a pH greater than 7 are basic or alkaline. A pH level of 7.0 at 25°C is defined as "neutral" because the concentration of H3O+ equals the concentration of OH− in pure water. On the other hand, electrical conductivity is a non-specific measurement of the concentration of both positively and negatively charged ions within a sample. So the short answer to the question is as follows, the presence of any hydrogen ions present in a substance will impact the pH level and most probably influence conductivity levels. However, hydrogen ions make up only a small part of the ion concentration measured by a conductivity meter.
How do you make condensation on glass?
Answers
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:
Write a few sentences about respiration
Answers
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.
such as a cow, has offspring, what characteristic will the offspring most likely inherit?
A Body shape and behavoir
B Hair or fur and number of legs
C Number of legs and scales
D Skin color and body segments
Answers
Hope I helped!!!!!!!!!
If the solution containing the metal complex ion is made acidic, why will the silver chloride precipitate
Answers
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.
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.
Answers
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.
Read more about Liquid-liquid extraction here https://brainly.com/question/25418695
Vinegar contains 5% acetic acid. The remaining 95% is just water. If you used 10 grams of vinegar, how many
grams of acetic acid did you use? What is 5% of 10 grams?
Answers
Answer: 0.5 grams of acetic acid
Explanation:
Just find 5 percent of 10 grams
5/100x10=0.5
How can the ocean floor be created and/or destroyed?
Answers
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:
How many moles does Phosphoric Acid have?
Answers
Answer:
0.010204583427424 per 1 gram.
0.01 moles Phosphoric Acid ⇒ 1.0000000000000153 gram(1 gram of acid)
I hope this answers your question! Have a great day.
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
Answers
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?
Explain why there is a problem in the disposal of polymers such as poly(chloroethene)
Answers
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.
hello ~
Which of the following metals does not react even with steam.?
A. Silver
B. Iron
C. Calcium
D. Sodium
Answers
Explanation:
it's silver
it doesn't react w steam
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
Answers
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
Learn more about titration:
https://brainly.com/question/14356286
What is Thermal Energy?
Answers
Which color will the solution most likely become?
Answers
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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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
Answers
Answer:
No. Gasoline and diesel fuel is. Steel is an alloy of iron, carbon, and various other metals- but it is not distilled.
find the molarity of a solution containing 25.2g kCl in 752mL of water
Answers
Answer:
1. Find the number of moles of solute dissolved in solution,
2. Find the volume of solution in liters, and.
3. Divide moles solute by liters solution.
Hope this helps you solve the problem.
A reaction vessel at 1215k contains a mixture of SO2( P = 2. 98 bar) and O2(P = 1. 18 bar). When a catalyst is added, this reaction takes place: 2SO2(g)+O2(g)⇌2SO3(g) At equilibrium the total pressure is 3. 80 bar.
Find the value of k?
Answers
This problem is providing the equilibrium reaction whereby SO3 is produced and asks for the value of the equilibrium constant. After the calculations, the answer turns out to be 0.124.
Chemical equilibrium.In chemistry, when a chemical reaction attempts to go to completion, it might experience a limitation known as equilibrium; a condition where it is not able to proceed any further.
In such a way, for the given reaction:
[tex]2SO_2(g)+O_2(g)\rightleftharpoons 2SO_3(g)[/tex]
We can write the equilibrium expression as:
[tex]K=\frac{p_{SO_3}^2}{p_{SO_2}^2p_{O_2}}[/tex]
Hence, given the total pressure at equilibrium, we can add the pressures of all the species at equilibrium including the reaction extent, x:
[tex]P_{eq}=p_{SO_3}+p_{SO_2}+p_{O_2}\\\\3.80=(2x)+(2.98-2x)+(1.18-x)[/tex]
Thus, we solve for x to obtain:
[tex]3.80-2.98-1.18=2x-2x-x\\\\-0.36=-x\\\\x=0.36bar[/tex]
Hence, we plug it in into the equilibrium expression to obtain the equilibrium constant as follows:
[tex]K=\frac{(2x)^2}{(2.98-2x)^2(1.18-x)}\\\\K=\frac{(2*0.36)^2}{(2.98-2*0.36)^2(1.18-0.36)}\\\\K=0.124[/tex]
Learn more about chemical equilibrium: https://brainly.com/question/26453983
11. How many moles of oxygen are produced when 5 moles of potassium chlorate(V)
decomposes completely?
2KCIO3 → 2KCl + 302
Answers
Answer:
The answer would be 4.5 moles of O2
List two additional questions to address climate change.
Answers
Answer: How is climate change affecting the ocean?
Is it climate change, global warming, or global climate crisis?
Calculate the molarity of 0.5 moles NaHCO3
in 5,314 mL of solution.
How do I solve this?
Answers
Answer: 0.094 M
Explanation:
what is endothermic reaction
Answers
Answer:
Endothermic reactions are chemical reactions in which the reactants absorb heat energy from the surroundings to form products.
Answer:
Chemical reactions that absorb (or use) energy overall are called endothermic. In endothermic reactions, more energy is absorbed when the bonds in the reactants are broken than is released when new bonds are formed in the products.
why. air and gas is different?.20pnts five reason.
Answers
Answer:
The air we breathe is primarily made of oxygen, and gases contain primarily nitrogen.
Explanation: