Answer:1)d- vinegar is has acetic acid and baking soda is a base
2)NaOH- Na dissociates into Na+ and -OH
3)b- water takes a proton (H+) off the conjugate acid, forming a base
Explanation:
Answer:
Baking Soda for sure
Hope this helps
Is the equation Zn+HCl > ZnCL2+H2 unbalanced or balanced
Answer:
unbalanced
Explanation:
Cl and H have an extra atom
- Hope that helps! Please let me know if you need further explanation.
How do you convert kilometers to grams
By multiplying the mass value by 1000.
Answer:
Hey!
What you have to do is to multiply the amount of mass * i.e. 67.9g * by 1000 * 67,900kg! *
Explanation:
HOPE THIS HELPS!
After a copper smelter begins operation, local downwind populations of plants begin to adapt to the resulting air pollution. Scientists document, for example, that the acid tolerance of several plant species has increased significantly in the polluted area. This is an example of...
artificial selection
over production
selective breeding
natural selection
Answer:
natural selection (directional selection).
Explanation:
Natural selection: In biology, the term "natural selection" is described as one of the central concepts associated with evolution. Through the process of natural selection, different organisms having favorable traits are most likely to reproduce. However, these organisms then pass the given traits to their next or coming generation. The process of natural selection allows different organisms to adapt to their specific environment.
Directional selection is considered as one of the different modes of natural selection.
In the question above, the given statement represents a natural selection.
I AM GIVING BRAINLIEST PLEASEEEEEE HELPPPPPPPPPP I NEEDDDDDDDD HELPPP PLEASE
How many grams of solute are needed to make 2.66L of a 1.99M C 12 H 22 O 11 solution?
Answer:
1812g
Explanation:
So molarity is moles/litres or M= mol/liter (lets apply this formula to find moles)
M=mol/L
1.99=mol/2.66
Moles= 5.2934 moles of C12H22O11
Next step is quite simple, we know molar mass of C12H22O11 is 342.3 g/mol so we simply multiply the moles we get to molar mass we are left with the grams needed,
5.2934 moles of C12H22O11 * 342.3 g C12H22O11 /mol = 1812g
(I have left out decimal places, you can caculate this and add them if you desire)
Which of the following is an example of a Lewis base?
O A. H+
B. BF3
O C. NH3
O D. H20+
Answer:
O C. NH3 is an example of a lewis base
2NaOH + H2SO4 > Na2SO4 + 2H2O
If you begin with 100 g of each reactant, how many moles of water will be formed?
Answer:
To calculate the number we need molar mass.
Hexyne. What does the name of this hydrocarbon tell you about its molecular structure?
OA.
There are six parent carbon atoms and one triple carbon bond.
There are six parent carbon atoms and one double carbon bond.
B.
C. There are seven parent carbon atoms and one triple bond.
D. There are eight parent carbon atoms and all single carbon bonds.
E.
There are eight parent carbon atoms and one triple bond.
Answer:
Hexyne. What does the name of this hydrocarbon tell you about its molecular structure?
A.There are six parent carbon atoms and one triple carbon bond.
B.There are six parent carbon atoms and one double carbon bond.
C. There are seven parent carbon atoms and one triple bond.
D. There are eight parent carbon atoms and all single carbon bonds.
E.There are eight parent carbon atoms and one triple bond.
Explanation:
The correct answer is A. The prefix "hex-" indicates that there are six carbon atoms in the molecule, and the suffix "-yne" indicates that there is a triple bond between two of the carbon atoms. Therefore, hexyne has six carbon atoms and one triple bond.
chemistry neutralization
Answer:
In chemistry, neutralization or neutralisation is a chemical reaction in which acid and a base react quantitatively with each other. In a reaction in water, neutralization results in there being no excess of hydrogen or hydroxide ions present in the solution.
Explanation:
Use the drop-down menus to select the correct answers to complete the paragraph.
The building blocks of matter are called . A substance made up of the same kind of atoms is called a(n) . elements lose particles. This makes them .
Explanation:
The building blocks of matter are called atoms
A substance made up of the same kind of atoms is called a element
unstable elements lose particles
This makes them radioactive
(i dd the assignment)
The correct words are:
AtomsElementParticlesRadioactiveAn atom is the smallest and indivisible part of matter.An element is made up of atoms with an equal amount of protons in them. A particle is what makes up an element.Radioactivity occurs when there is a sudden burst of radiation.Read more here:
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explain a natural process, while
describe a natural process.
Answer:
a natural process is water cycle.
Explanation:
during this process,water evaporates from different water bodies ,when the warm water rises,the cold and heavier water comes down to take its place.On the other hand,the warm water on rising,changes to water vapour.
This water vapour helps in the formation of clouds .
When the cloud becomes heavy and is not able to hold the water vapour, it falls down as rain or snow depending upon the climate and atmospheric temperature.
This process continues over and over again
What is the mole fraction of Ba(OH)2 in an aqueous solution that contains 22.8% Ba(OH)2 by mass?
Answer:
0.03
Explanation:
22.8 g Ba(OH)2 (1 mol Ba (OH)2/ 171.34 g) = 0.133 mol Ba (OH)2
77.2 g H2O (1 mol H2O/18 g) = 4.29 mol H2O
X= molar fraction= mol Ba(OH)2/ mol total
X= 0.133/ (0.133+4.29) = 0.03
0.03 is the mole fraction of [tex]Ba(OH)_2[/tex] in an aqueous solution that contains 22.8% [tex]Ba(OH)_2[/tex] by mass.
What is a mole fraction?The ratio of the number of moles of one component of a solution or other mixture to the total number of moles representing all of the components.
Moles of [tex]Ba(OH)_2[/tex]
Moles = [tex]\frac{mass}{molar \;mass}[/tex]
Moles = [tex]\frac{22.8 g Ba(OH)_2}{171.34 g}[/tex]
= 0.133 mol [tex]Ba (OH)_2[/tex]
Moles of [tex]H_2O[/tex]
[tex]Moles = \frac{mass}{molar \;mass}[/tex]
[tex]Moles = \frac{77.2 g H_2O}{18 g}[/tex]
= 4.29 mol [tex]H_2O[/tex]
The mole fraction of [tex]Ba(OH)_2[/tex]
[tex]\frac{mol Ba(OH)_2}{total \;mol}[/tex]
= 0.03
0.03 is the mole fraction of [tex]Ba(OH)_2[/tex] in an aqueous solution that contains 22.8% [tex]Ba(OH)_2[/tex] by mass.
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The two products that are formed when a solution of HNO3 and a solution of NaOH react are water and?
NaNO2
NaNO3
NaHNO
NaHNO3
Answer:
NaNO3
Explanation:
Hello,
In this case, the required reaction is an acid-base neutralization reaction which is said to be:
[tex]HNO_3+NaOH\rightarrow NaNO_3+H_2O[/tex]
There, we see that the sodium displaced the hydrogen in the nitric acid to form sodium nitrate a very used salt in the industry, so, as a result of that displacement, water is formed as the secondary neutralization product. For the above mentioned, answer is NaNO3 .
Best regards.
Answer: NaNO3
Explanation:
A salt sodium nitrate (NaNO3) is formed alongside water (H2O) when HNO3 and a solution of NaOH undergoes a neutralization reaction.
HNO3 + NaOH --------> NaNO3 + H2O
How can the motion of atoms in the solid state of most substances be described?
Answer:
The molecules in a solid are stuck in a specific structure or arrangement of atoms. The atoms still vibrate and the electrons fly around in their orbitals, but the entire atom will not change its position.
In which two ways can the timber industry help prevent loss of forest cover and animal habitats?
Answer:
Cut trees at a sustainable rate
and
Plant one tree for every tree that is cut.
hope i helped, if i could get brainliest that would be great
If the acetylene tank contains 37.0 mil of C2H2 and the oxygen tank contains 81.0 mol of O2, what is the limiting reactant for this reaction
2C2H2(l)+502(g) 4CO2(g)+2H2O(g)
Answer:
Explanation:
2C₂H₂(l) + 50₂(g) = 4CO₂(g) + 2H₂O(g)
2 mol 5 mol
2 mol of C₂H₂ reacts with 5 mol of O₂
37 mol of C₂H₂ will require 5/2 x 37 mol of O₂
= 92.5 mol of O₂
But oxygen available is only 81 mol so formation of product will be controlled by oxygen available . Hence oxygen is the limiting factor.
You take a very hot block of metal on top of a cold block of metal. What will
happen to the temperature of both blocks over time?
Answer:
They will both cool down overtime
Explanation:
Once you put something that is hot on something that is cold. They will both be hot, but overtime they will cool down. It can't stay hot forever.
Answer:
Hey!
Your answer is that one block of metal (the cold one) would heat up a bit whilst the other block (the hot one) would cool down...This is because of the metal's CONDUCTIVITY!
Explanation:
Eventually you would measure the temperature of both blocks and they will reach the same temperature. After this they will naturally cool down...
HOPE THIS HELPS!!
1. Which gas will move faster through a small opening hydrogen or oxygen? *
A)hydrogen
B) oxygen
Answer:
hydrogen
Explanation:
A student observes the chemical process described by this equation:
4Al + 3O2 → 2Al2O3
How does the mass of the new substance compare to the total mass of the starting materials?
Answer:
Both are equal
Explanation:
Mass of starting material i.e Aluminium is [tex]4.480 * 10^{-23}[/tex] grams
The weight of oxygen is [tex]2.65 * 10^{-23}[/tex]
There are 4 atoms of aluminium and 3 atoms of oxygen
Thus, the total mass of starting material is
[tex]4 *[/tex] mass of one atom of aluminium [tex]+ 6 *[/tex] mass of one atom of oxygen
[tex]4 * 4.480 * 10^{-23} + 6* 2.65 * 10^{-23}[/tex]
[tex]35.1 * 10^{-23}[/tex] grams
Mass of new substance is also equal to
[tex]4 *[/tex] mass of one atom of aluminium [tex]+ 6 *[/tex] mass of one atom of oxygen
[tex]4 * 4.480 * 10^{-23} + 6* 2.65 * 10^{-23}[/tex]
[tex]35.1 * 10^{-23}[/tex] grams
Why were scientists surprised to find coal in the arctic?
Answer:
coal is made from compressed plant matter and how exactly did plants grow on the surface of an ocean. (as there is no land mass beneath the arctic.)
Explanation:
it would be like finding a fly in an ice cube to simplify it.
They were surprised to find coal in arctic because ordinarily coal was supposed to be found in warm or hot environments and not cold region like the arctic.
The arctic is located at the far northern part of the world which is characterized by its extreme cold weather.
A limited vegetation of plants such as grasses, mosses and lichens are found in this region irrespective of the extreme cold weather through out the year.
Coal is a type of fuel gotten from fossils and deposits of plant vegetation.
Scientist has discovered that continents do move over time through a process called continental drift. This is the reason why limited vegetaion is found in the arctic leading to the formation of coal.
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new evidence can lead to a change in scientific knowlodge
true or false
Answer:
true
Explanation:
Answer:
True, new evidence can lead to a change in scientific knowledge.
Explanation:
Where does your body get the energy needed to transform into kinetic energy to move around all day
Answer:
food, mostly consists of what you eat.
Explanation:
The body get the energy needed to transform into kinetic energy from food.
Food:Every body part (muscles, brain, heart, and liver) need energy to work. This energy comes from the food we eat. Our bodies digest the food we eat by mixing it with fluids (acids and enzymes) in the stomach.
The main sources of energy are: carbohydrates, lipids, and proteins.
Find more information about Food here:
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What is the molarity of a solution in which 0.45 grams of sodium nitrate (NaNO3) are dissolved in 265mL of the solution?
A. 29.8M
B. 87.2M
C. 0.02M
D. 0.52M
Answer:
M=0.02
Explanation:
85 g NaNO3 -> 1 mol NaNO3
0.45 g NaNO3 ->x
x=(0.45 g NaNO3 * 1 mol NaNO3)/85 g NaNO3 x= 5.3 x 10^-3 mol
265 mL= 0.265 L
M= mol solute/ L solution
M= 5.3 x 10^-3 mol NaNO3/0.265 L M=0.02
Which of the following is the energy of moving electrons?
a. kinetic energy
b. thermal energy
c. nuclear energy
d. electrical energy
Answer:
Electrical energy
Explanation:
Electrical energy is caused by the moving of electrons.
hope it helps!
A geologist took this aerial photo of a location where a river flows out of a mountain range.
What feature is pictured here?
alluvial fan
delta
flood plain
oxbow lake
Answer:
A alluvial fan
Explanation:
A geologist took this aerial photo of a location where a river flows out of a mountain range. The feature of the picture is fan. Hence option a is correct.
What is geologist?Geologist is defined as a scientist who focuses on the processes that shape terrestrial planets and the solid, liquid, and gaseous materials that makes up Earth. Geologists study the elements, processes, results, physical properties, and history of the planet.
Fan is defined as a buildup of sediments that spreads out from a concentrated supply of sediment, such as a small canyon that emerges from a cliff. As long as these three conditions are met, Fans can form at any elevation: water running is present.
Thus, a geologist took this aerial photo of a location where a river flows out of a mountain range. The feature of the picture is fan. Hence option a is correct.
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Which is usually associated with a slower reaction rate?
A. using a whole solid in the reactants
B. adding heat energy to the reactants
C. adding food coloring to the reactants
D. using a strong solution of the reactants
How many moles of calcium chloride are contained in a 333 gram sample?
*
A) 8.82 moles
B) 0.333 moles
C) 4.30 moles
D) 0 3.00 moles
Answer & Explanation:
The molar mass of calcium chloride is 110.98 g/mol. We can use this information to solve this problem. We can set up our equation like this..
[tex]\frac{333 g(CaCl2)}{} *\frac{1mol(CaCl2)}{110.98g(CaCl2)}[/tex]
Multiply straight across on the top and straight across on the bottom.
[tex]\frac{333}{110.98}[/tex]
Now divide.
[tex]\frac{333}{110.98}=3.00[/tex]
So, there are 3.00 moles of calcium chloride contained in a 33 gram sample which is answer choice D.
how many moles of solute are present in 50.0 ml of 0.20 m kno3
Answer: Volume = 50.0 mL in liters : 50.0 / 1000 = 0.05 L
n = M x V
n = 0.20 x 0.05
n = 0.01 moles of solute
Explanation:
The number of moles of solute are present in 50.0 mL of 0.20 M of KNO₃ solution is 0.01 moles.
How do we calculate moles?Moles will be calculated by using the molarity formula because molarity is define as the no. of moles of solute present in per liter of the solution as:
M = n/V, where
M = molarity of KNO₃ = 0.2 M
V = volume of solution = 50mL = 0.05L
Moles will be calculated as:
n = (0.2)(0.05) = 0.01 moles
Hence required moles are 0.01 moles.
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A boy jumps into a cold swimming pool and his body temperature goes down. His muscles, blood vessels, and nervous system work together to restore his body temperature. These responses allow the body to maintain--- Select one: stress balance work structure
Answer:
balance
Explanation:
Using tongs, place the 250 mL beaker on the hotplate.
Temperature of the water: 65
°C. Reaction time:
seconds
Answer:
first question: temp: 40, time: 26.3
second question: temp: 65, time: 14.2
Explanation:
for edge 2021
HELPPP TODAY IS THE LAST DAY OF SCHOOL
Answer:
orbiting closer to the earth's surface.....im pretty sure abt it
