Answer:
D) contains more OH– ions than H+ ions
Explanation:
Bases have high concentration of hydroxides (OH-) and acids have high concentration of (H+) ions
Like an acid the aqueous solution of a base should be option D) contains more OH– ions than H+ ions.
What is aqueous solution of a base?An aqueous solution refers to the solvent when it should be dissolved in the liquid water. It is considered to be the solute ions or the dissolved ions also the molecules should be surrounded by the water molecules and it should be incorporated when the network of the bond should lies within the water.
Also, the base contains high concentration of hydroxides (OH-) and acids have high concentration of (H+) ions
Hence, the option d is correct.
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1. An airplane flew from San Francisco to Washington, D.C.
Approximately halfway through the flight, the plane had traveled 2,000
km in 2.5 hours. What was the speed during this period?
Propane, the gas used in barbeque grills, is made of
carbon and hydrogen. Will the atoms that make up
propane form covalent bonds? Why or why not?
Answer:
The atoms of propane will form covalent bonds because carbon and hydrogen are both nonmetals.
Explanation:
sample response
Ideal Stoichiometry
Barium oxide has a replacement reaction with lithium. Calculate the mass of Barium oxide needed to react with 34.67 g of lithium.
*equation needed and thorough explanation please*
A- 340.5
B- 383.0
C- 455.0
D- 256.8
Answer:
the answer is 383.0
hope it is helpful
If matter is neither created nor destroyed, why can’t we just go directly from grams of reactant to grams of product?
According to the law of conservation of mass, there is no net change in the reactants' and products' masses before and after a chemical reaction.
What is chemical reaction?Chemical reaction is defined as a procedure where one or more compounds, known as reactants, are changed into one or more new substances, known as products. When atoms establish or break chemical bonds, chemical reaction take place.
Law of conservation of mass is defined as a chemical reaction requires that the total mass of the reactants and products be equal. Law of conservation of mass also stated that mass is always conserved throughout chemical reactions and cannot be created or removed.
Thus, according to the law of conservation of mass, there is no net change in the reactants' and products' masses before and after a chemical reaction.
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9. Mangnesium can form compounds by acting with different oxidation numbers (2-, 3+, 4+, 6+, 7+). Argue your answer.
a) Which of the following species can act as oxidizing agents?
b) Which ones as reducing agents?
a) Mn2 +
b) MnO2
c) MnO-4
d) NnO2-4
e) Mn (OH) 2
A 5.72-L football is filled with air at 1.85 atm. At the same temperature, the volume of the football is reduced to 2.13 L. What is the pressure of air in the ball?
Answer:
4.97 atm
Explanation:
P2=V1P1/V2
I know this is correct because P and V at constant T have an inverse relationship.
- Hope that helps! Please let me know if you need further explanation.
In most mirrors, the virtual image appears to come from behind the mirror. True False
Answer
False
Explanation:
if the element xenon applied for a job, what job would it apply for
Answer:
A photographer.
Explanation:
Xenon is used in photographic flashes.
1. How much 6.0 M HNO3 is needed to neutralize 39 mL of 2.0 M KOH?
2. How much 3.0 M NaOH is needed to neutralize 30. mL of 0.75 M H2SO4?
3. What is the concentration of 20 mL of LiOH if it is neutralized by 60 mL of 4 M HCl?
4. What is the concentration of 60 mL of H3PO4 if it is neutralized by 225 mL of 2 M Ba(OH)2?
5.How much 2 M HBr is needed to neutralize 380 mL of 0.1 M NH4OH?
Answer:
For 2. the answer is 15.0 mL
For other examples, you can solve by exact way as I have solved the 2nd example.
I have writen down all the balanced chemical reaction equation for examples 1, 3, 4, 5 for you. ( picture 2 )
Explanation:
Please see the step-by-step solution in the picture attached below.(picture 1)
Hope this answer can help you. Have a nice day!
what causes different colors to appear in the sky?
Answer:
Molecules and small particles in the atmosphere change the direction of light rays, causing them to scatter. Scattering affects the color of light coming from the sky.
Explanation:
Explain on any two materials that you would expect to use for the wheelchair (both back support and
arm support) with less generation of heat during the hot summers.
Answer:
In the backrest use materials where it is easy to clean and where they do not absorb fluids, in this way it would be cooler, such as an ecological leather simulator.
And in the armrest as well, but in both areas we must not rule out that if or if it should have even a minimum of padded surface so that the patient or the person who spends most of the day in the wheelchair does not suffer from joint pain.
Explanation:
Some wheelchair factories also implement modern chairs where they are made of stainless steel structures lined with padded material with perforated fabrics that allow breathing and aeration of body areas that have contact with the fabric.
Which characteristic most likely describes the water in Lake Taal?
Select the correct answer.
o The water will appear slightly red.
O The water will have a slippery feel.
The water will taste bitter.
The water will taste sour.
Answer: The water will taste sour.
Explanation:
Answer: D. The water will taste sour (Edmentum)
Explanation:
Look at these two molecular diagrams and think about the features of the compounds. (SEE PICTURE)
1. A chain of 5 C atoms is bonded to H above and below and to the left and the right, except that the 4th C is bonded to C H subscript 3 above instead of a plain H. 2. A chain of 4 C atoms is bonded to H above and below and to the left and the right, except the second C in the chain is bonded to C H subscript 3 above and below.
Which descriptions apply to these two compounds? Check all that apply.
are isomers of each other
have same molecular formula
have same structural formula
are both hydrocarbons
have same number of each kind of atom
have same geometric arrangement of atoms
Answer:
A, B, D, E
Explanation:
correct on Edge 2020
Answer:
1) are isomers of each other
2) are isomers of each other
4) are both hydrocarbons
5) have same number of each kind of atom
Explanation: edg 2020
A sample of carbon dioxide occupies a volume of 1.50L at 165KPå pressure. What pressure would the gas exert if the volume was increased to
2.5L?
a.0.023 kPa
b. 275 kPa
c. 99 L
d. 99 kPa
Answer:
B. 275 kPa
Explanation:
Since we need to find the greater value, because 1.50<2.5, then the only greater value would be 275 kPa.
What is a covalent bond
Which is the control center for the endrocrine system?
Answer:
hypothalamus
Explanation:
(Multiple Choice, 30 pts)
A student wants to determine whether an unknown solid is an ionic compound. He puts some in water and finds that it does not dissolve. He says that this proves the solid is ionic. Which best evaluates the student's reasoning?
A. He is incorrect, because water can dissolve ionic solids.
B. The test proves nothing, because water dissolves all solids.
C. He is correct, because polar liquids cannot dissolve ionic solids.
D. The test proves nothing, because it only shows that the solid is a compound.
(I know water is polar, so I think its a?)
The student cannot prove that if the compound is ionic or covalent because not all ionic compounds dissolves in water. Some ionic compounds have higher lattice energy results in lower solubility. Thus, option D could be correct.
What are ionic compounds?Ionic compounds are formed between metals and non metals. Metals are electron rich and they easily donate electrons to the non-metals. Non-metals are generally electronegative and they easily gains electrons from the metals.
Donating electrons make metals acquire positive charge and the non-metals acquire a negative charge. This charge separation make the compound possess a permanent dipole moment. Which make them easily soluble in water by ion-dipole interaction.
However, some ionic compounds have very strong ionic bonds and their binding energy will be greater so that cannot be easily dissolved in water. For example, AgCl. Therefore, we cannot predict weather the compound is ionic or not by simply noting it solubility in water.
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What are three examples of acid-base reactions in cooking
Answer:
Lemon juice baking soda and vinegar
Explanation:
Describe the different types of storms.
Answer:
The different types of storms are hailstorms, ice storms, snowstorms, thunderstorms, wind storms, hurricanes, and tornadoes.
Explanation:
What type of element is generally largest
Answer:Hydrogen
Explanation:is the most abundant element in the universe (75%by weight or 88% of all of the atoms of the universe)
5. What is the % of each element in Al2(Cro4)3?
Explanation:
Utiliza mayúsculas para el primer carácter en el elemento y minúsculas para el segundo carácter. Ejemplos: Fe, Au, Co, Br, C, O, N, F.
Puedes utilizar los paréntesis () o los corchetes [].
HELP PLZZZ !!!!!!!!!!!!
Answer:
1/ 421.2 g KNO3
2/ 66.6 g S
3/ 275.0 g CO2
Explanation:
Please see the step-by-step solution in the picture attached below.
Hope this answer can help you. Have a nice day!
Cuando se queman combustibles que tienen algún compuesto de azufre se produce dióxido de azufre (SO2), un gas irritante que puede provocar lluvia ácida. En el análisis del aire de una ciudad se ha encontrado una concentración de SO2 de 14 mg/m^3 ¿Qué cantidad de SO2 habrá en 1 L de aire?
Answer:
See answer below
Explanation:
I have to answer this question in english because is the rule here. I hope you can understand this.
Now, in order to answer this, is really easy. We already have the quantity of SO₂ in the air of a city. This concentration is 14 mg/m³, so we want to know the quantity in 1 L. This quantity can be expressed in mass.
If concentration according to the units is: mg/m³ This means that we have units of mass and volume. So, in order to know the quantity of SO₂ in mass, we need to convert the units of volume m³ to liter.
1 m³ is covered in 1000 L, therefore:
14 mg/m³ * 1 m³/1000 L = 0.014 mg/L
Then, the mass will be:
m = 0.014 mg/L * 1 L
m = 0.014 mg of SO₂
This is the quantity of SO₂ in 1 L.
When humans plant more trees, carbon can begin entering the ____
a- hydrosphere
b- geosphere
c- biosphere
Answer:
biosphere
Explanation:
The carbon cycle is the biogeochemical cycle by which carbon is exchanged between the biosphere, geosphere, hydrosphere and atmosphere of the Earth.
The biosphere refers to the regions of the surface and atmosphere of the earth or another planet occupied by living organisms.
Plants are responsible for taking in carbon in nature. When more trees are planted, carbon is absorbed by plants which is a component of the biosphere. Hence planting more trees means increasing the intake of carbon into the biosphere.
If you made 6 moles of NO2 how many grams of N2 did you use?
Answer:
3
Explanation
N is 14, so multiply it by 6 (because 6 moles). Since it's N2, divide it by 2, then divide it by 14 (N in grams).
Which describes the boundary where earthquake activity occurs along rift valleys? divergent boundary in the ocean divergent boundary on land convergent boundary in the ocean divergent boundary on land
Answer:
Divergent boundary on land
Explanation:
A rift valley is a lowland region that forms where Earth’s tectonic plates move apart (diverge), or rift. Rift valleys are found both on land and at the bottom of the ocean, where they are created by the process of seafloor spreading.
Rift valleys are created by tectonic activity and not the process of erosion.
Tectonic plates are huge, rocky slabs of Earth's lithosphere—its crust and upper mantle. Tectonic plates are constantly in motion—shifting against each other in fault zones, falling beneath one another in a process called subduction, crashing against one another at convergent plate boundaries, and tearing apart from each other at divergent plate boundaries.
The most well-known rift valley on Earth is probably the so-called "Great Rift Valley System" which stretches from the Middle East in the north to Mozambique in the south. The area is geologically active, and features volcanoes, hot springs, geysers, and frequent earthquakes.
Divergent boundary on land describes the boundary where earthquake activity occurs along rift valleys
for better understanding let's explain divergent plate boundary
Divergent plate boundary often happens only where 2 tectonic plates separate and thereafter create new land. most of them are in the ocean (Mid Atlantic Ridge). The Great Rift Valley in Africa is an example of a divergent plate boundary on thereafter the Great Rift Valley is filled of with water and product is a sea.Rift valley is commonly known as an area in a mid-ocean ridge where the plates are often separated and new crust begins to form. where plate tectonics exist, there is a divergent boundary or divergent plate boundary also called constructive boundary orfrom the above we can therefore say that the answer Divergent boundary on land describes the boundary where earthquake activity occurs along rift valleys, is correct
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What is the measure for the amount of disorder in a system?
Answer: Entropy
Explanation: Entropy. A measure of the level of disorder of a system is entropy, represented by S
Hoped this helped!!!!
A child has a balloon in his house in the air conditioning. He goes outside with the balloon on a hot day. What happens to the temperature of the gas and volume of the balloon?
Answer:
There would be an increase in temperature and corresponding increase in the volume of the balloon
Explanation:
Charles law is been here
Charles law states that the volume of a given mass of gas is directly proportional to the temperature in Kelvin, provided that the pressure on the gas is kept constant. Mathematically Charles law can be represented thus;
V∝ T
Where V is the volume of the gas and;
T is the temperature.
Relating Charles Law to the question
The child moved outside from the room, constant atmospheric pressure is maintained.The temperature of the room is lower than the temperature outside.From Charles law postulation, there would be an increase in volume because of the increased temperature, since our pressure is same.
7. Cigarette smoke and UV radiation are two
examples of a
Answer:
carcinogen
Explanation:
cigarette smoke and UV radiation both of the capability to cause cancer cells in living tissue, meaning they can both be classed as carcinogens
In photosynthesis, what are the two major reactions that take place?
Answer:
The two stages of photosynthesis: Photosynthesis takes place in two stages: light-dependent reactions and the Calvin cycle (light-independent reactions). Light-dependent reactions, which take place in the thylakoid membrane, use light energy to make ATP and NADPH.
Explanation:
Hope you get it right!
The two major reactions that takes place in photosynthesis are light dependent and light independent reactions.
PHOTOSYNTHESIS:
Photosynthesis is the process by which green plants and other autotrophic organisms obtain their own food using energy from sunlight. The process of photosynthesis takes place in the chloroplast organelle of the cell where a pigment called CHLOROPHYLL, absorbs photons of light. Photosynthesis, however, consists of two stages namely: light dependent and light independent reactions. Light dependent reaction takes place strictly in the presence of sunlight and involves the production of ATP and NADPH molecules, which are used in light independent reaction. Light independent reaction, also called Calvin cycle, can occur with or without sunlight, hence, it is called dark reaction. Calvin cycle uses the product of the light stage to synthesize glucose molecule. Therefore, the two major reactions that takes place in photosynthesis are light dependent and light independent reactions.Learn more: https://brainly.com/question/15289200?referrer=searchResults
