Answer:
Its B
Explanation:
Answer:
I think the answer is polar covalent as there will be an unequal amount of electrons shared/available. An ionic bond will not take place because the valance shell of the larger atom contains more than 1 electron.
Plzzz helpp me fast hdhskekwkjdbdjewi
Answer:
none of the above
Explanation:
d. How does the radius of a positive and negative ion compare to a neutral atom? (1 point)
Answer:
A positive ion has fewer electrons, and importantly, fewer electron shells (since atoms usually lose electrons until they get down to an empty outer shell.) This makes it smaller than a neutral atom of that element.
A negative ion has more electrons, and importantly, greater electron-electron repulsion in its outer shell. This makes it larger than a neutral atom of that element.
PLEASE HELP MEEEE
What type of sunscreen can best reduce risk of melanoma? SPF 4 used daily SPF 4 used once a month SPF 15 or higher used daily SPF 15 or higher used once a month -this is science-
Answer:
spf 30
Explanation:
its a good sunscreen btw
2. What is an element?
Answer: the answer is c i looked it up please give me brainliest pleaseeee
Explanation:
Based on the balanced equation, if 60.1 grams of Nitrogen (N2) are used, how many grams of ammonia (NH3) is made?
3 H2 + 1 N2 ----> 2 NH3
Answer:
mass NH₃ produced = 72.9g (3 sig. figs.)
Explanation:
3H₂ + N₂ => 2NH₃
given excess 60.1g (?)grams
moles => (60.1g/28g/mol)
= 2.15mole => 2(2.15mole)
= 4.29mole NH₃
mass NH₃ = 4.29moles x 17 g/mole = 72.9grams NH₃
Always convert given data into moles, solve in terms of moles and convert to needed dimension from mole yields. :-)
Answer:
73.07 grams of ammonia is produced.
Explanation:
In order to find the grams of ammonia produced, we need to find the amount of the reactants so that we know how much product (ammonia) the reactants (Hydrogen and Nitrogen) can and will produce.
First, we need to use the balanced equation to find the amount of moles equivalent to the 60.1 grams of Nitrogen that reacts.
To convert from Grams to Moles, we will divide by the molar mass (amu)..
60.1 grams of N2 / 2(14.01) grams N2 = 2.144896502 moles of N2.
So, we know that 60.1 grams of N2 equals 2.144896502 moles.
Now, we will look at the balanced equation and convert from moles of N2 to moles of NH3 in order to later find the grams of NH3 (ammonia) produced..
2.144896502 moles N2 * 2 moles NH3/1 mol N2 = 4.289793004 moles NH3.
Now that we know the amount of moles produced of ammonia, we will convert to grams. We can do this by multiplying by the molar mass of ammonia which is 17.034 (N = 14.01, H = 1.008, ---> 14.01 +3(1.008) = 17.034)
4.289793004 moles NH3 * 17.034/1 mol = 73.07233403 grams NH3
This can be estimated to 73.07 grams of NH3 (ammonia) produced.
If you are still confused on how to convert between moles and grams, please see the uploaded image.
____ describes the quantity of solute that
can dissolve in a given amount of solvent at a
given temperature.
A. Viscosity
B. Solubility
C. Fluidity
D. Permeability
Answer:
B
Explanation:
Compute the specific heat capacity at constant volume of nitrogen (N2) gas. The molar mass of N2 is 28.0 g/mol.
Answer:Specific heat capacity at Constant volume of Nitrogen =742.32JKg.K
Explanation:
The Specific heat capacity at Constant volume of an ideal gas is given as
c =Cv / M
Cv= Constant volue of gas
M= Molar mass
But First, we determine the Constant volume, Cv which is given as
Cv = 5/2R since Nitrogen is a diatomic gas, N2 where R= 8.314Jmol.k
= 5/2 x 8.314Jmol.K
=20.785Jmol.K
Specific heat capacity at Constant volume, c
c= Cv/M
M=molar mass = 28.0 g/mol.
changing to kg/mol =28/1000= 0.028kg/mol
Therefore c =20.785Jmol.K/0.028kg/mol
=742.32JKg.K
The moles of MnO4- can be calculated by multiplying the volume of MnO4- required to reach the endpoint multiplied by the molarity of the MnO4- solution. What are the moles of MnO4- used in the titration?
Answer:
See explanation
Explanation:
The molarity of the KMnO4 solution= 0.0815 M
For the first trial;
number of moles = 30.44/1000 * 0.0815 = 2.48 * 10^-3 moles
For the second trial;
number of moles = 31.24/1000 * 0.0815 = 2.55 * 10^-3 moles
For the third trial;
number of moles = 31.89/1000 * 0.0815 = 2.6 * 10^-3 moles
ASAP NEED HELP SCIENCE
Answer: I think the answer is A or D I'm not sure
Explanation:
During beta-oxidation of fatty acids, ___________ is produced in peroxisomes but not in mitochondria. A) acetyl-CoA B) FADH 2 C) H 2 O D) H 2 O 2 E) NADH
Answer:
The correct option is D
Explanation:
Normally, beta-oxidation of fatty acid occurs in the mitchondrial matrix, however, when the fatty acid chains are too long, the beta-oxidation occurs in the peroxisomes where the oxidation is not attached to ATP synthesis but rather transferred (i.e high energy electrons are transferred) to O₂ to form hydrogen peroxide (H₂O₂). This is the major difference between the beta-oxidation that occurs in the peroxisomes to that which occurs in the mitochondria.
What happens to the abundance of elements as their atomic numbers increase?
Answer:
Their abundance decreases.
Explanation:
Google :)
An aqueous magnesium chloride solution is made by dissolving 5.54 moles of MgCl2 in sufficient water so that the final volume of the solution is 2.70 L . Calculate the molarity of the MgCl2 solution.
Answer:
poggers
Explanation:
The picture shows a scientist collecting data from an ice core whats the answer giving brainliest PLEASE HELP
Answer:
I’m going with her it c
Explanation:
Answer:
it maybe C
Explanation:
but please I need this answer fast and if you don't know it don't answer it D.
Answer:
its just a chromosome getting ready to split in a cell, Its called the telophase and its copying itself for the mother and daughter cell
Consider the equation CH4 + O2 —> 2H2O + CO2
Which element or elements are unbalanced in this equation?
C, H and O are all unbalanced
Both H and O are unbalanced
Only the H is unbalanced
Only the O is unbalanced
Answer:
O is the only 3lement that is unbalanced
Answer:
The answer is: Only the Ois unbalanced.
Explanation:
I took the test
When zinc and HCl are reacted, the product is hydrogen gas. You can measure the reaction rate by measuring what?
PLEASE HELP ME
Answer:
measuring the consumption of the products and the rate of conversion of products to reagents
Explanation:
It must be taken into account that the reaction rate also depends on the presence of a catalyst, since these advance the rate of the reaction.
What happens to water when it changes to ice?
Its density increases.
Its density decreases.
Its mass increases.
Its mass decreases.
Its volume increases.
Its volume decreases
Answer:
Its density decreases
Its volume increases
Explanation:
You notice that ice floats on water, this means that its density is less. The mass remains the same because you did not add or remove anything. But what causes the density to decrease then? For density to change, there needs to be a change in either the volume or the mass of the object. Density is calculate by mass/volume. Since the mass did not change, the volume must have. So in this case, the volume increases. Hence, this is what causes it to be less dense. :)
Answer:
D.
Explanation:
brainliest pls
A student takes a container of pure water and then adds drink mix from a
shaker. The student adds one shake and then a second shake of drink mix
to the water. The three boxes below show a microscopic sample of the
water and then the solution as drink mix is added. Use these pictures to
answer the following questions.
Answer:
increases, the ratio of drink mix to water particles increases.
Explanation:
also took the test
When you are done using the glassware from a kit, what should you do?
a. Wipe down the glassware to remove any cleaning solvent.
b. Place the glassware on shelves with similar pieces.
c. Inspect glassware for cleanliness and defects.
d. Place glassware back in its original positions in the kit.
Answer:
A. Wipe down the glassware to remove any cleaning solvent.
Explanation:
· Remove stoppers and stopcocks when they are not in use. Otherwise, they may "freeze" in place. You can de-grease ground glass joints by wiping them with a lint-free towel soaked with ether or acetone. Wear gloves and avoid breathing the fumes. The deionized water rinse should form a smooth sheet when poured through clean glassware.
Glassware refer to any laboratory apparatus made of glass. When you are done using a glassware, wipe down the glassware to remove any cleaning solvent.
A lot of our laboratory apparatus are made of glass e.g beakers, conical flask, measuring cylinders etc. These glassware must be properly cleaned after use.
They are often washed with a solvent and particles of the cleaning solvent adheres to the glassware.
These particles of the solvent must be wiped to remove these particles of cleaning solvent that could contaminate a sample placed in the glassware.
Learn more: https://brainly.com/question/24279142
how to balance Cl2(g) + KBr(aq)
Answer:
Cl₂(g) + 2 KBr(aq) ⇒ Br₂(l) + 2 KCl(aq)
Explanation:
Let's consider the unbalanced single displacement reaction between chlorine and potassium bromide.
Cl₂(g) + KBr(aq) ⇒ Br₂(l) + KCl(aq)
We will start balancing Cl atoms by multiplying KCl by 2.
Cl₂(g) + KBr(aq) ⇒ Br₂(l) + 2 KCl(aq)
Finally, to get the balanced equation, we have to multiply KBr by 2.
Cl₂(g) + 2 KBr(aq) ⇒ Br₂(l) + 2 KCl(aq)
Writing Chemical Equations
Balance the equation for the reaction of dicarbon tetrahydride with oxygen gas to produce carbon dioxide and water.
Answer:
The prefix di means 2 and the prefix hexa means 6.
As per IUPAC rules you must use the prefixes to indicate the number of atoms of each element in the formula.
So, the proper name for the compound C2H6 is dicarbon hexahydride.
Explanation:
The balanced equation for the reaction of dicarbon tetrahydride with oxygen gas to produce carbon dioxide and water is [tex]\rm C_2H_4 + 3O_2 \rightarrow 2CO_2 + 2H_2O[/tex].
A reaction is a process that involves the transformation of one or more substances into one or more different substances.
The balanced chemical equation for the reaction between dicarbon tetrahydride ([tex]\rm C_2H_4[/tex]) and oxygen gas ([tex]\rm O_2[/tex]) to produce carbon dioxide ([tex]\rm CO_2[/tex]) and water ([tex]\rm H_2O[/tex]) is:
[tex]\rm C_2H_4 + 3O_2 \rightarrow 2CO_2 + 2H_2O[/tex]
In this reaction, two molecules of carbon dioxide and two molecules of water are produced for every molecule of dicarbon tetrahydride and three molecules of oxygen gas that react. The equation is balanced because the number of atoms of each element is the same on both sides of the equation.
Therefore, [tex]\rm C_2H_4 + 3O_2 \rightarrow 2CO_2 + 2H_2O[/tex] is the balanced chemical equation for the reaction of dicarbon tetrahydride with oxygen gas to produce carbon dioxide and water.
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which proccess do NOT build mountains
Answer:
its does not
Explanation:
not do...................
The compound with the molecular formula C4H10 is called
Answer:
butane
Explanation:
I hope this helps!
Answer:
Butane
...............
Which of the following situations would cause light to refract?
When light passes from one medium to the other of different density, the light ray will bend. This is called refraction. Light moving from air to water cause refraction. Hence, option d is correct.
What is refraction ?Refraction is a phenomenon in which a light ray bent in its direction when passing from one medium to the other where the mediums have different densities.
The measure of bending of light in a medium is called refractive index of that medium. It depends on the density as well as velocity of light through the medium.
For example, when light passes from air to water or air to glass it bends. We can clearly observe the bending in the light ray at the boundary of the two mediums. Hence, option D is correct.
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The options of your question were as follows:
A. traveling through a vacuum B. passing from one glass block to another C. moving through the air D. moving from air to water.
Is the potential energy of the roller coaster elastic or gravitational?
Question 8 options:
both
elastic
gravitational
neither
Answer:
gravitational
Explanation:
Hope this helps :)
How much 5.80 M NaOH must be added to 550.0 mL of a buffer that is 0.0215 M acetic acid and 0.0255 M sodium acetate to raise the pH to 5.75
Answer:
1.64mL of 5.80M are added
Explanation:
First, we need to calculate total moles of acetic buffer. Then, with H-H equation, we need to find ratio of moles of acetate and acetic acid.
The moles of acetate increased are due the addition of moles of NaOH. Thus, we can find the volume of 5.80M NaOH that must be added:
Moles acetic acid and sodium acetate:
Acetic acid: 0.550L * (0.0215mol/L) = 0.011825 moles
Acetate: 0.550L * (0.0255mol/L) = 0.014025 moles
Total moles = 0.02585 moles = [Acetate] + [Acetic acid] (1)
H-H equation:
pH = pKa + log [Acetate] / [Acetic acid]
Where pH is 5.75;
pKa of acetic acid is 4.74;
And [ ] could be taken as moles of each species.
5.75 = 4.74 + log [Acetate] / [Acetic acid]
10.2329 = [Acetate] / [Acetic acid] (2)
Replacing (1) in (2):
10.2329 = 0.02585 - [Acetic acid] / [Acetic acid]
10.2329[Acetic acid] = 0.02585 - [Acetic acid]
11.2329[Acetic acid] = 0.02585
[Acetic acid] = 0.002301 moles.
Moles acetate:
[Acetate] = 0.02585 moles - 0.002301 moles = 0.023549 moles
Initial moles were 0.014025 moles, moles of acetate added (Due the addition of NaOH) are:
0.023549 moles - 0.014025 moles = 0.009524 moles of NaOH
Volume is:
0.009524 moles of NaOH * (1L / 5.80mol) = 1.64x10⁻³L = 1.64mL of 5.80M are added
A buffer solution is a solution consisting of a weak base and conjugate acid or vice versa. 1.64 mL of 5.80M NaOH must be added to increase pH.
What is volume?Volume is the space or the area is occupied by a substance. It is calculated in milliliters, liters, etc.
Moles of acetic acid: [tex]0.550 \times 0.0215 = 0.011825 \;\rm moles[/tex]
And, moles of acetate: [tex]0.550 \times 0.0255 = 0.014025 \;\rm moles[/tex]
Now, the total moles = 0.02585 moles (equation 1)
Using the pH equation the ratio of moles of acetate and acetic acid is calculated as:
[tex]\begin{aligned} \rm pH& =\rm pKa + log \dfrac{[Acetate]}{[Acetic \;acid]}\\\\5.75 &= 4.74 +\rm log\dfrac {[Acetate]}{[Acetic \;acid]}\\\\10.2329 &= \rm \dfrac{[Acetate]}{[Acetic \;acid]} \rm .....(equation 2) \end{aligned}[/tex]
Now replacing the value of equation 1 in 2:
[tex]\begin{aligned}10.2329 &= 0.02585 - \rm \dfrac{[Acetic acid]}{[Acetic \;acid]}\\\\10.2329[\rm Acetic \; acid] &= 0.02585 - [\rm Acetic \; acid]\\\\&= 0.002301 \;\rm moles\end{aligned}[/tex]
Moles of acetate is calculated as:
0.02585 moles - 0.002301 moles = 0.023549 moles
The added moles of sodium hydroxide are: 0.023549 moles - 0.014025 moles = 0.009524 moles
Volume is calculated as:
[tex]0.009524\; \text{moles of NaOH}\times (1 \;\rm L / 5.80 \;\rm mol) = 1.64 \times 10 ^{-3}\;\rm L[/tex]
Therefore, 1.64 mL of 5.80 M sodium hydroxide should be added.
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Which statement is true about the cell membrane? It allows an unlimited amount of water to enter. It stops waste substances from passing through. It is not selective about which gases enter or leave the cell. It is selective about which substances enter or leave the cell.
Answer:
It is selective about which substances enter or leave the cell.
Explanation:
Also srry for spamming u all the time.
UwU hope this helps tho
Answer:
It is selective about which substances enter or leave the cell
Explanation:
I have learned this already
3 Points
Vinegar is a mixture of about 5 g of acetic acid in every 95 g of water. Therefore, the acetic acid is the
solvent, and the water is the solute.
True or False?
The solubility of barium carbonate, BaCO3, is 0.0100 g/L. Its molar mass is 197.3 g/mol. What is the Ksp of barium carbonate
Answer:
Ksp = 2.58x10⁻⁹
Explanation:
The equilibrium that takes place is:
BaCO₃(s) ↔ Ba⁺² + CO₃⁻³Ksp = [Ba⁺²] [CO₃⁻³]The molar concentration of Ba⁺² at equilibrium is the solubility. The same can be said about CO₃⁻³:
Ksp = s * sKsp = s²So now we can calculate the Ksp from the solubility, after converting the solubility from g/L to mol/L:
0.0100 g BaCO₃/L ÷ 197.34 g/mol = 5.07x10⁻⁵ mol/LKsp = (5.07x10⁻⁵ mol/L)²
Ksp = 2.58x10⁻⁹What 2 ions can affect the pH