Answer:
27.03 g/mol
Explanation:
Molar Mass of HCN
Mass of Hydrogen : 1.008
Mass of Carbon: 12.01
Mass of Nitrogen: 14.01
Molar Mass of HCN =
1.008 + 12.01 + 14.01=
27.03 g/mol
PLEASEEE HELPPP I BEGG FOR HELPP GUYS PLEASEE
The oxygen atom is an extremely strong _____________________.
A) reducing agent B) oxidizing agent C) anion D) cation
Answer:
oxidizing agent!
Explanation:
i hope this helps
Answer:
Oxygen is a A) oxidizing agent.
Explanation:
An element that is reduced is an oxidizing agent, because the element gains electrons. Oxygen is very electronegative and wants electrons to complete its valence shell. When electrons are gained, the oxygen is reduced. The oxygen is thus an oxidizing agent.
An equilibrium mixture of O2, SO2 and SO3 contains equal concentrations of SO2 and SO3.
Calculate the concentration of O2 if Kc = 270 for the reaction: 2 SO2(g) + O2(g) - 2 SO3(0)
Answer:
[O₂(g)] = 0.0037M
Explanation:
2SO₂(g) + O₂(g) => 2SO₃(g)
Conc: [SO₂(g)] [O₂(g)] [SO₃(g)] and [SO₂(g)] = [SO₃(g)]
Kc = [SO₃(g)]²/[O₂(g)][SO₂(g)]² => Kc = 1/[O₂(g)] = 270 if [SO₂(g)] = [SO₃(g)]
∴ [O₂(g)] = (1/270)M = 0.0037M
The equilibrium constant Kc is the ratio of concentration of products to the product of concentrations of reactants. Here, the concentration of O₂ will be 0.0037 molar.
What is Kc ?Kc of a reaction is the equilibrium constant of that reaction expressed in terms of concentration of products and reactants. It is the ratio of product of molar concentration of products to the product of molar concentration of the reactants.
An equilibrium mixture of a reaction is attained when the reaction in both forward and backward reaction occurs in same rate.
The equilibrium constant Kc for the given reaction can be written as follows:
[tex]Kc = \frac{[SO_{3}]}{[SO_{2}][O_{2}]} = 270[/tex]
Provided that the concentrations [SO₃] and [SO₂ are equal and thus the expression becomes:
Kc = 1/[O₂] = 270
[O₂] = 0.0037 M
Hence, the molar concentration of oxygen in equilibrium mixture of the reaction is 0.0037 molar.
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Identify the spectator ions in this reaction:
H+ + Br – + K+ + OH– --> K+ + Br– + H2O
H+ and K+
Br – and OH–
K+ and Br–
Answer:
the correct answer is C) K+ and Br-
Explanation:
Spectator ions are the ions on the right side of the equation which do not combine to form products. we can see that potassium ions (K+) and bromine ions (Br-) appear unreacted on both sides of the equation
Which type of bond is present within a water molecule
Answer:
Covalent bonds
Explanation:
A bag of potato chips is sealed in a factory near sea level. The atmospheric pressure at the factory is
0.82 millimeters of mercury (mm Hg). The pressure inside the bag is the same. What is the pressure
inside the bag of potato chips in Pascal's (Pa)?
Answer: The pressure inside the bag of potato chips in Pascal's is 109
Explanation:
Pressure of the gas is defined as the force exerted by the particles on the walls of the container. S.I unit of pressure is pascal.
Thus units of pressure can be mm Hg or atmosphere or bar or Pascal.
Given : Pressure inside the bag is the same as atmospheric pressure at the factory = 0.82 mmHg
Pressure 760 mm Hg = 101325 Pa
0.82 mm Hg = [tex]\frac{101325}{760}\times 0.82=109Pa[/tex]
Thus the pressure inside the bag of potato chips in Pascal's is 109
Final answer:
The pressure inside the bag of potato chips, sealed at 0.82 mm Hg, is equivalent to 109.324 Pascals (Pa) when converted using the factor 1 mm Hg = 133.322 Pa.
Explanation:
The pressure inside a bag of potato chips, if sealed at 0.82 mm Hg near sea level, can be converted to Pascals (Pa). As the conversion factor between mm Hg and Pa is 1 mm Hg = 133.322 Pa, we simply multiply the given pressure in mm Hg by this factor to obtain the pressure in Pascals.
To calculate the pressure in Pascals:
Multiply the pressure in mm Hg by 133.322 Pa/mm Hg.
So, the pressure inside the bag in pascals is:
Pressure in Pa = 0.82 mm Hg × 133.322 Pa/mm Hg
Pressure in Pa = 109.324 Pa
Therefore, the pressure inside the bag of potato chips is 109.324 Pascals (Pa).
Why is sexual reproduction beneficial
Nancy wants to find out how the steepness of a hill's slope affects the amount of soil that erodes from it. She has soil, a long pan, and a pile of books with which to build a model hillside. She has a watering can to model rainfall.
In her experiment, which of the following factors should Nancy make sure that she does not change?
It Is A Type Of Lily
Regarded botanically as perennial with the scientific name herbaceous perennial, Agapanthus Peter Pan is an African lily. Hence, it’s also called as “The Blue African Lily of the Nile”. The flowers appear in trumpet-shaped rounded clusters with darker mid-vein petals.
They come out in an upright position due to its long stalks and are surrounded by narrow, loose and strap-shaped leaves. In addition, some categorize the plant under bulbs although it’s not, but due to the fact that it has fleshy and thick roots.
#3 – It Has Other Names
There are other terms known for Agapanthus Peter Pan. Other than simply African lily, this is often called as The Blue African Lily of the Nile, African Lily Peter Pan, Lily of the Nile Peter Pan, Dwarf Lily of the Nile and Dwarf African Lily. This also explains the reason why most of the imported evergreen agapanthus came from certain parts of South Africa as these are better grown in milder climate areas with higher or heavy rainfall.
Therefore, the flowers typically bloom from the months of July to August, which are commonly known as the summer season in the US, Canada and Europe, and extends up to October. Of course, you’d see the glamorous, blue flowers in spring too.
#5 – It Needs Full Sun
This beautiful flower relies on sunlight in order to grow and remain healthy. However, planting it around a partly shaded area is alright.
You also have to keep in mind that this kind of plant must not be dried out or else it dies. Thus, watering regularly is a basic priority.
#6 – It Can Survive The Winter
Although it’s best planted in milder areas and sunny season, Agapanthus Peter Pan can endure the coldness of fall and winter seasons. In fact, you can place foliage in a pot or a small container so you can easily transport it inside your home.
This also implies that you don’t need a large, spacious garden to display this plant around your surroundings.
#7 – It Is Not Shrubby
Unlike some plants, Agapanthus Peter Pan grow in almost round, V-shape without spreading in a way that it reaches to an unparalleled position.
Its spread extends from 1 to 2 inches. Nevertheless, it can definitely create an elegant landscape view whether it’s planted in front of your house or in the backyard.
Based on an article excerpt from Plant Care Today, Agapanthus plants generally grow from 18 inches to 5 feet depending on the variant. But for Agapanthus Peter Pan, it can grow to a minimum height of 8 inches to 18 inches.
#8 – It Most Likely Grows In Moist, Drained Soil
In addition to the climate, remember that plants are best nurtured in an area where the kind of soil is met. It has to be a soil type of chalk, clay, loam or sand. In the case of Agapanthus Peter Pan, fertile, moist and well-drained soil must be considered.
#9 – It Is Easy To Grow
This plant requires low maintenance. All you need is enough sun, water and well-drained soil. Consider adding some organic material for fertilizing if you want to keep the plant healthy and flowers stunningly beautiful.
#10 – It Attracts Butterflies And Birds
The beauty of the blue flowers of Agapanthus Peter Pan is evident and undeniable due to the fact that they are favorite places for small birds and butterflies to go to. An even more so interesting fact is that it’s free from pests and diseases. It is also rabbit, deer and drought resistant.
Growing and Maintenance Tips:
As mentioned previously, Agapanthus Peter Pan is less difficult to take care of. But doing the right way is still vital to bear in mind. So here’s a list of quick tips on how to properly plant this agapanthus for beginners and maintain its beautiful foliage.
The Planting Process
1. If you choose to plant in the ground, dig holes but not too deep.
2. Amend the soil with some organic matter as fertilizer.
3. Carefully remove the plants from the containers and make sure the root ball is intact.
4. Loosen the soil and roots around the bottom as well as the edges of the root ball.
5. Place the plant in the hole leveling with surrounding soil, and spread roots outward.
6. Fill in the hole and around the roots with amended native soil.
7. Gently water.
8. Cover the whole area with leaf or bark.
9. Water again but this time deeply.
The Regular Watering Process
Water every morning. Night watering may promote diseases. As you water, go slowly and deeply, and if possible, do it twice with a few minutes apart. Keep in mind that you avoid over watering as this can cause some root problems. To conserve water, use a hose. Just keep the soil wet! And water the flowers everyday!
Answer: The amount of water she pours on the model
Explanation: Nancy wants to test how a hill's slope can affect erosion. Because of this, she will want to change the height of one end of her hill model as she pours water down the slope. Other variables, such as the amount of water she pours on the model and the type of soil she uses, should not change.
Calculate the pH of a solution of 0.25M H2SO4
Answer:
im pretty sure its 1.3 if its wrong sorry
Explanation:
Balance this equation:
The molarity of a solution prepared by dissolving 17.0 g of hydrochloric acid (HCl (aq)) in 133 mL of water is ___ M (2 decimal place).
The molarity is 3.50 M/L.
Explanation:
Molarity is found to know the amount of the solute ions present in the given volume of solution. So we determine it using the ratio of the moles of solute to the volume of the solution.
As here the weight of the solute which is hydrochloric acid is given as 17g, so we need to find the moles of it. This can be done by dividing the given amount of HCl with the molecular weight of HCl.
Molecular weight of HCl = 1.01 + 35.45 = 36.46 g/mol
So the number of moles of HCl present here will be
[tex]No.of moles = \frac{17}{36.46} =0.466[/tex]
So, 0.466 moles of HCl is present in the solution.
[tex]Molarity = \frac{No.of moles of solute}{Volume of solution} = \frac{0.466}{133*10^{-3} }[/tex]
[tex]Molarity = 3.50 M/L[/tex]
Thus, the molarity is 3.50 M/L.
How many molecules of ATP may be produced from glucose
Explanation:
38 ATP molecules May be produced from glucose
In aerobic respiration, which occurs in the presence of oxygen, one molecule of glucose can produce a maximum of 36 to 38 molecules of adenosine triphosphate (ATP) through the process of cellular respiration. This process involves several steps, including glycolysis, the Krebs cycle, and oxidative phosphorylation.
During glycolysis, which takes place in the cytoplasm, two molecules of ATP are produced directly from one molecule of glucose. The remaining ATP molecules are generated during the later stages of cellular respiration.
In the Krebs cycle and oxidative phosphorylation, the breakdown products of glucose undergo further chemical reactions that release energy. This energy is then used to produce ATP through a process called oxidative phosphorylation, which occurs in the mitochondria.
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need help
Two objects (A and B) of the same temperature are in contact with each other.
Which statement is true?
Although the molecules collide, no heat transfers because there is no temperature difference between the objects.
Heat transfers from object B to object A, because molecules from B collide with those from A.
Heat transfers from object A to object B, because molecules from A collide with those from B.
No heat transfers, because there are no collisions between the molecules of the objects.
Answer:
The answers are either 1 or 4
Explanation:
I am pretty dure it is 1
If two objects A and B of same temperature are in contact with each other, there will be no transfer of heat. Hence, option A is true.
Heat TransferHeat is the transfer of energy from one object to another, for this transfer it is necessary that there is difference between the temperature of the objects.
In this question the objects A and B of the same temperature are in contact with each other, and the law of transfer of heat energy says without temperature difference there will be no heat transfer, hence the option A which says "Although the molecules collide, no heat transfers because there is no temperature difference between the objects" is correct.
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2 upper N upper o upper c l double-headed arrow 2 upper N upper O (g) plus upper C l subscript 2 (g).
At equilibrium, the concentrations are as follows.
[NOCl] = 1.4 ´ 10–2 M
[NO] = 1.2 ´ 10–3 M
[Cl2] = 2.2 ´ 10–3 M
What is the value of Keq for the reaction expressed in scientific notation?
1.6 ´ 10–5
6.2 ´ 10–4
6.2 ´ 104
1.6 ´ 105
Answer:
1.6x10^–5
Explanation:
Step 1:
The balanced equation for the reaction.
This is illustrated below:
2NOCl <=> 2NO + Cl2
Step 2:
Data obtained from the question.
[NOCl] = 1.4x10^–2 M
[NO] = 1.2x10^–3 M
[Cl2] = 2.2x10^–3 M
Equilibrium constant, K =?
Step 3:
Determination of the equilibrium constant.
The equilibrium constant for the above equation can be written as:
K = [NO]^2 [Cl2] / [NOCl]^2
Inputing the values of the [NO], [Cl2] and [NOCl], the equilibrium constant is:
K = [NO]^2 [Cl2] / [NOCl]^2
K = (1.2x10^–3)^2 x (2.2x10^–3) / (1.4x10^–2)^2
K = 1.6x10^–5
Answer:
A
Explanation:
If 6.42 g of water is produced, how many grams of oxygen gas reacted?
Answer:
5.76g
Explanation:
2H2 + O2 => 2H2O
Molar mass of H2O = 18g/Mol
No of mole of H2O = 6.42/18 = 0.36 moles of water.
1 mole of O2 gives 2 moles of water.
Xmole of O2 gives 0.36 moles of water.
X = 0.36/2 = 0.18 mole
Molar mass of O2 = 32g/mol
Mass = 32 × 0.18 = 5.76g.
4. Draw a Lewis dot diagram of Lithium bonding with Fluorine. How many electrons moved?
One lithium (Li) atom can combine with one fluorine (F) atom. Together, they make the formula LiF. Fluorine has seven electrons of it's own. Lithium gives up its one electron to make both atoms happy. So the fluorine atom has eight electrons, and a filled outer shell.
An image is attached for reference.
Will a precipitate form if you mix barium chloride and potassium carbonate?
Potassium carbonate reacts with barium chloride to precipitate insoluble barium salts that is barium carbonate, when the solutions are mixed together you'll see white precipitate that is barium carbonate and potassium is dissolve in the solution to form potassium chloride.
How much heat (in Joules) is needed to raise the temperature of 257g of ethanol (cethanol=2.4 J/g°C) by 49.1°C?
Answer:
Q = 30284.88 j
Explanation:
Given data:
Mass of ethanol = 257 g
Cp = 2.4 j/g.°C
Chnage in temperature = ΔT = 49.1°C
Heat required = ?
Solution:
Specific heat capacity:
It is the amount of heat required to raise the temperature of one gram of substance by one degree.
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
Now we will put the values in formula.
Q = 257 g× 2.4 j/g.°C × 49.1 °C
Q = 30284.88 j
Suppose an atom gains an e-. What will be the overall electrical charge? What if an atom loses one e-?
Can someone please help me ASAP
5.54 moles of AgNO3 are dissolved in 0.48 L of water. What is the molarity of the AgNO, solution?
Answer:
11.54 M
Explanation:
In this case, all we have to do is to apply the following expression:
M = n/V
M: molarity
n: moles
V: volume of solution in liters
In this case, we can assume that the volume of water will be the volume of solution. This is because the problem is not specifing if the moles of AgNO3 are liquid or solid, so we can make a safe assumption of the volume.
Using the expression above we have:
M = 5.54 / 0.48
M = 11.54 M
This is the molarity of solution
Answer:
the molarity of the AgNO₃ is 11.5417 mol/L
Explanation:
Given:
nAgNO₃ = 5.54 moles
V = 0.48 L
Question: What is the molarity of the AgNO₃, solution, M = ?
To calculate the molarity, the number of moles must be divided by the volume of the solution.
[tex]M=\frac{n}{V} =\frac{5.54}{0.48} =11.5417mol/L[/tex]
what is the coefficient for calcium oxide? CaO(s) + CO2(g) → CaCO3(s)
Answer:
The coefficient is 1
Explanation:
CaO(s) + CO2(g) -> CaCO3(s)
In the balanced equation, the coefficient for CaO is 1
The coefficient represents the number of moles of a compound in the stoichiometry of the reaction
Final answer:
The coefficient for calcium oxide in the reaction CaO(s) + CO₂(g) → CaCO₃(s) is 1. The reaction is in stoichiometric balance, with each reactant and product having a coefficient of 1, indicating a 1:1:1 molar ratio.
Explanation:
The coefficient for calcium oxide in the equation CaO(s) + CO₂(g) → CaCO₃(s) is 1. In chemical reactions, the coefficients indicate the number of moles of each substance involved in the reaction. In this case, one mole of calcium oxide reacts with one mole of carbon dioxide to produce one mole of calcium carbonate, making the coefficient for each reactant and product 1. This balanced equation represents a stoichiometric relationship, meaning the number of atoms for each element is conserved.
Moreover, understanding the reaction between calcium oxide and water or carbon dioxide and water provides important context. Calcium oxide reacts with water to form calcium hydroxide (Ca(OH)₂), and carbon dioxide reacts with water to form carbonic acid (H₂CO₃). However, these are separate reactions from the one in the question. The decomposition reaction of calcium carbonate into calcium oxide and carbon dioxide is represented by the equilibrium equation: CaCO₃ (s) ⇌ CaO (s) + CO₂ (g). This equilibrium illustrates that the reaction can proceed in both the forward and reverse directions, and under certain conditions, can achieve a 100% yield of calcium oxide if the carbon dioxide is continuously removed.
____Zn(s) + ____HCl(aq) → ____ZnCl2(s) + ____H2(g)
Hey there!
Assuming you want us to balance the equation:
Zn + HCl → ZnCl₂ + H₂
Balance Zn.
1 on the left, 1 on the right. Already balanced.
Balance H.
1 on the left, 2 on the right. Add a coefficient of 2 in front of HCl.
Zn + 2HCl → ZnCl₂ + H₂
Balance Cl.
2 on the left, 2 on the right. Already balanced.
Our final balanced equation:
Zn + 2HCl → ZnCl₂ + H₂
Hope this helps!
Which actions conserve fossil fuels? Choose the two correct answers.
A.
wasting food
B.
riding a bike
C.
planting trees
D.
buying bottled water
E.
using less electricity
how many elements are in NH3
Answer:
2 elements.
Explanation:
N is your Nitrogen and H is your Hydrogen. Elements are just one specific kind of atom. You have two elements with names Nitrogen and Hydrogen. Therefore, you have two elements.
Answer:
2
Explanation:
Ammonia is composed of one nitrogen atom and 3 hydrogen atoms
N= Nitrogen
H3= 3 of Hydrogen
True
False
1. The phenolphthalein indicator is not affected by the pH of the
solution.
Answer:
the answer is False.
Explanation:
the indicator solution is directly related to the PH. When the solution becomes neutral (ph 7), the indicator will become clear.
The statement that Phenolphthalein is not affected by PH is False
Phenolphthalein is a colorless chemical compound, when added to alkaline solutions it will turns pink, which means it has been affected by the PH.Phenolphthalein will remain colorless if in acidic solution, that's less than PH of 7. But at pH level of 8.2 it turns pink then at pH 10 it turns magenta.Therefore, PH do affect Phenolphthalein indicator
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How many grams of chlorine gas are needed to
react with 3.50 liters of a 1.70 molar potassium
bromide solution?
Cl2 + 2KBr — 2KCI + Br
Answer:
answer pl
please
because I
An opened carbonated drink is an example of what type of solution? *
Answer:
An open carbonated drink is an example of a saturated solution.
Explanation:
A carbonated drink is a saturated solution of carbon dioxide in water under a certain pressure. If the soft drink container is opened, the pressure on the surface of the drink is decreased to atmospheric pressure, and several carbon dioxide molecules leave the solution, and if enough time passes, the drink will end without gas.
Answer:
It is an example of an Aqueous solution.
Explanation:
A solution is a mixture that contains one or more solutes in a solvent. It can be in a solid, liquid or gaseous form, or the combination of two or more.
A carbonated drink is a solution that contains majorly liquids and gases. The main gas is the carbon (IV) oxide that has been used to preserve its taste.
When a bottle of carbonated drink is opened, the gas (carbon dioxide) stored under pressure escapes and evaporates. Thereby causing bubbles to move within the content of the bottle.
This is an example of an aqueous solution because the major solvent in the drink is water.
Which catalyzed reaction breaks up ozone? 2H2O2(l) right arrow with upper M n upper O subscript 2 above it. 2H2O(l) + O2 O3 + O Right arrow with upper C upper S above it. 2O2 2H2O2 (aq) Right arrow with upper P t subscript 3 above it. 2H2O(l) + O2 O2 + 2SO2Right arrow with upper N upper O above it. 2SO3
Answer: B
Explanation: The answer is B
The balanced equation of the decomposition reaction of ozone is written as below:
[tex]\rm O + O_{3} \rightarrow 2O_{2}[/tex]
Hence, option b is correct.
What is ozone ?Ozone is a toxic gas formed by the combination of atmospheric oxygen with nascent oxygen gas. Ozone exists as a layer in the stratospheric layer of the atmosphere.
Ozone protects earth from harmful UV rays. Decomposition of ozone results in depletion of ozone layer which leads to the UV radiation reaching intensely to the earth's surface.
The oxygen gas formed from the decomposition of ozone further reacts with sulphur gas as written above produce harmful sulphur dioxide. Sulphur dioxide further reacts with water forms sulphuric acid causes acid rain.
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Determine the molecular weight of H2O.
189
18.0 g
18.019
18.016 9
Answer:
18.01534
The last one
Explanation:
The molar mass of H20 is 15.9994+(2 x 1.00797) which equals 18.01534 grams/mole.
The boundaries of a watershed are determined by
Select one:
A- soil type
B- the kinds of plants found in the area
C- the amount of water that flows
D- elevation
please answer quickly !
Answer:
elevation
Explanation: