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.
Convert the following mass of a compound into moles.
23.5g of NaCl
Answer:
0.402 moles
Explanation:
1 mole NaCl/58.44g Nacl ×23.5g NaCl
grams get cancelled out and you are left with moles
A 32 g sample of LiCl is dissolved in water to for 655 mL of solution. What is the molarity of the solution?
1.1 x 10-3 M LICI
1.1 M LICI
4.9 x 10-2 M LICI
49 M LICI
Answer : The molarity of the solution is, 1.1 M LiCl
Explanation : Given,
Mass of [tex]LiCl[/tex] = 32 g
Volume of solution = 655 mL
Molar mass of [tex]LiCl[/tex] = 42.4 g/mole
Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.
Formula used :
[tex]\text{Molarity}=\frac{\text{Mass of }LiCl\times 1000}{\text{Molar mass of }LiCl\times \text{Volume of solution (in mL)}}[/tex]
Now put all the given values in this formula, we get:
[tex]\text{Molarity}=\frac{32g\times 1000}{42.4g/mole\times 655mL}=1.1mole/L=1.1M[/tex]
Therefore, the molarity of the solution is, 1.1 M LiCl
The molarity of the LiCl solution is 1.15 M.
Explanation:To calculate the molarity of the solution, we first need to convert the mass of LiCl to moles using the molar mass of LiCl. The molar mass of LiCl is 6.94 g/mol + 35.45 g/mol = 42.39 g/mol. Therefore, the number of moles of LiCl is:
32 g ÷ 42.39 g/mol = 0.755 mol
Next, we divide the number of moles by the volume of the solution in liters to calculate the molarity:
0.755 mol ÷ 0.655 L = 1.15 M LiCl
What are the reactants and products of esters????:/
Reactants: Carboxylic Acid + Alcohol
Products: Ester + Water
Esters are formed in a chemical reaction called esterification, which typically involves the following reactants and products:
- Reactants:
1. Carboxylic Acid (R-COOH) - an organic compound with a carboxyl group.
2. Alcohol (R'-OH) - an organic compound with a hydroxyl group.
- Products:
1. Ester (R-COO-R') - the organic compound formed from the reaction.
2. Water (H₂O) - a byproduct of the reaction.
This reaction is often catalyzed by an acid, such as sulfuric acid (H₂SO₄).
Which factors describe a Mediterranean climate? Check all that apply.
has very few trees
is found in inland areas
has cool and rainy winters
has little to no precipitation
has dense shrubs and grasses
Answer:
Has very few trees, has cold and rainy winters, and has dense shrubs and grasses.
Calculate the specific heat capacity of a new alloy if a 15.4 g sample absorbs 297 Joules when it is heated from 5.0 °C to 20.7 °C. The key assumes you are giving your answer in Joules/g°C and rounding to 2 or 3 sig figs
Answer: The specific heat of alloy is [tex]1.23J/g^0C[/tex]
Explanation:
The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.
[tex]Q=m\times c\times \Delta T[/tex]
Q = Heat absorbed = 297 J
m= mass of substance = 15.4 g
c = specific heat capacity = ?
Initial temperature = [tex]T_i[/tex] = 5.0°C
Final temperature = [tex]T_f[/tex] =20.7°C
Change in temperature ,[tex]\Delta T=T_f-T_i=(20.7-5.0)^0C=15.7^0C[/tex]
Putting in the values, we get:
[tex]297J=15.4g\times c\times 15.7^0C[/tex]
[tex]c=1.23J/g^0C[/tex]
The specific heat of alloy is [tex]1.23J/g^0C[/tex]
The specific heat capacity of the new alloy is approximately 1.22 J/g°C.
Calculating Specific Heat Capacity:
To calculate the specific heat capacity of a new alloy, we use the formula:
q = mcΔTWhere:
q = heat absorbed (297 Joules)m = mass (15.4 g)c = specific heat capacity (J/g°C)ΔT = change in temperature (20.7 °C - 5.0 °C) = 15.7 °CRearranging the formula to solve for c:
[tex]c = \frac{q}{m\Delta T} = \frac{297\ J}{15.4 g \times 15.7 ^\circ C} \approx 1.22 J/g^\circ C[/tex]Therefore, the specific heat capacity of the alloy is approximately 1.22 J/g°C.
A small research submarine with a volume of 1.2 x 105 L has an internal pressure of 1.0 atm and an internal temperature of 150 C. If the submarine descends to a depth where the pressure is 150 atm and the temperature is 30 C, what will the volume of the gas inside be if the hull of the submarine breaks?
Answer:
V₂ = 570 L
Explanation:
Given data:
Initial volume = 1.2 ×10⁵ L
Initial pressure = 1 atm
Initial temperature = 150 °C (150 +273 = 423 K)
Final temperature = 30°C (30+273 = 303 K)
Final volume = ?
Final pressure = 150 atm
Formula:
P₁V₁/T₁ = P₂V₂/T₂
P₁ = Initial pressure
V₁ = Initial volume
T₁ = Initial temperature
P₂ = Final pressure
V₂ = Final volume
T₂ = Final temperature
Solution:
V₂ = P₁V₁ T₂/ T₁ P₂
V₂ = 1.0 atm × 1.2 ×10⁵ L × 303 K / 423 K × 150 atm
V₂ = 363.6×10⁵ L atm .L. K / 63450 K.atm
V₂ = 0.0057×10⁵ L
V₂ = 570 L
Why does the earth not receive energy equally
The earth doesn't receive the same energy equally because of its shape. The earth is a sphere, the energy in the equatorial regions are more than the polar regions.
Which of the following are part of the Carbon Cycle? A. respiration B. combustion C. photosynthesis D. decomposition E. all of the above
Answer:
E. All of the Above
Explanation:
Because it requires all to create and reuse carbon
What is the molar mass for Iron(I) Phosphate?
Hey there!
I think you meant to put iron (II) phosphate, because iron (I) phosphate isn't a thing.
So the formula for iron (II) phosphate is Fe₃(PO₄)₂.
Molar mass:
Fe: 3 x 55.845 = 167.535
P: 2 x 30.97 = 61.94
O: 8 x 16 = 128
-------------------------------------
357.475 grams/mole
The molar mass of iron(II) phosphate is 357.475 g/mol.
Hope this helps!
The molar mass for Iron(II) Phosphate is 176.124 g/mol, found by summing the molar masses of iron and phosphate. This calculation involves considering the atomic masses multiplied by the number of atoms in the compound.
The molar mass for Iron(II) Phosphate is computed to be 176.124 g/mol. To determine this, you start by finding the individual molar masses of iron and phosphate and then adding them up according to the compound's formula.
For Iron(II) Phosphate, you'd have 3 iron atoms with a total molar mass of 167.8 g/mol and 2 phosphate ions with a total molar mass of 8.324 g/mol, giving a total molar mass of 176.124 g/mol.
[H+] = 1.0 x 10-5 M
What’s the ion concentration ?
Answer:
pH = +5
Explanation:
pH = - log [H+]
pH = - log (1×10^-5)
pH = 5.
The picture above shows the water cycle. In the water cycle, water travels from the land to the sky and back again. Water leaves the ocean through _______ and returns to the ocean through _______.
A.
evaporation; precipitation and run-off
B.
condensation; evaporation
C.
transpiration; precipitation and run-off
D.
run-off; condensation
The picture above shows the water cycle. In the water cycle, water travels from the land to the sky and back again. Water leaves the ocean through Evaporation and returns to the ocean through Precipitation and run-off.
Thank You ☺️ ☺️.
☆ ★ Make It Brainlist Answer Please.....Answer:
A
Explanation:
Brainiest
Remember do it today start now don’t wait
Which describes the two cells formed through mitosis?
Answer:
Mitosis forms two daughter cells. The daughter cells will be exactly the same as the parent cell. Skin cells, liver cells, and generally all somatic cells undergo mitosis besides sex cells.
Explanation:
plz brainlest
hope this helps
cutie :)
Caclulate the pH of a solution with a hydrogen ion concentration of 1X10-7
Answer:
The pH of the solution is 7.00 .
Explanation:
The pH gives us an idea of the acidity or basicity of a solution. More precisely, it indicates the concentration of H30 + ions present in said solution. The pH scale ranges from 0 to 14: from 0 to 7 corresponds to acid solutions, 7 neutral solutions and between 7 and 14 basic solutions. It is calculated as:
pH = -log (H30 +)
pH= -log (1x10^-7)
pH= 7.00
Explain the process of root wedging.
Answer:
Root Wedging is the process in which roots grow into the cracks in rocks and force the cracks open as they continue to grow.
Explanation:
A material was cooled from 100°C to 40°C. What is the temperature change?
A -40°C
B 60°C
C 40°C
D -60°C
Answer:
D
Explanation:
carrying capacity is the maximum population that a given area can support.
am I right???
There will be change in the population of a species everyday. The carrying capacity is the maximum population that a given area can support. Thus the given statement is right.
What is carrying capacity?The carrying capacity is defined as the maximum population, density or biomass that a specific area can support sustainably. This likely changes over time and also depends on many environmental factors, presence of predators, etc.
It is the carrying capacity which denotes the point where the population cannot grow further theoretically and it is not growing any larger. It can be increased by supplying greater amount of food, decreasing predation, raising the amount of habitat, etc.
It can be decreased by increasing predation, decreasing the amount of habitat, etc. A constant K is used to represent the carrying capacity. It is due to this the population is found to be in a stable state.
Thus carrying capacity is the maximum population that a given area can sustain.
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Does anhydrous salt contain any water?
Answer: No
Explanation:
Balance the following chemical reactions:
1. Pb(NO₃)₂ → PbO + NO₂ + O₂
2. CH₄ + O₂ → CO₂ + H₂O
3. Cu + AgNO₃ → Cu(NO₃)₂ + Ag
4. MnO₂ + HCl → MnCl₂ + H₂O + Cl₂
5. Pb(NO₃)₂ + NaCl → PbCl₂ + NaNO₃
Write the chemical reaction and balance it.
1. A solution of potassium chloride when mixed with silver nitrate solution, an insoluble
white substance is formed.
2. Copper sulphate on treatment with potassium iodide precipitates cuprous iodide(Cu₂l₂),
liberates iodine gas and also forms potassium sulphate.
1. 2Pb(NO₃)₂ → 2PbO + 4NO₂ + O₂
2. CH₄ + 2O₂ → CO₂ + 2H₂O
3. Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag
4. MnO₂ + 4HCl → MnCl₂ + 2H₂O + Cl₂
5. Pb(NO₃)₂ + 2NaCl → PbCl₂ + 2NaNO₃
1)
[tex]NaCl+AgNO_3=>NaNO_3+AgC\downarrow[/tex]
2)
CuSO_4+Cu_2Cl_2\neq>
[tex]CuSO_4+Cu_2l_2\neq[/tex]
A student needed to make 100.0 mL of 0.20M NaOH solution. How many grams of sodium hydroxide does the student need to weigh out
Answer:
0.8 g
Explanation:
The molarity of a solution is calculated with the following formula:
[tex]M=\frac{n}{V}[/tex]
where:
n is the number of moles of the solute
V is the volume of the solution
In this problem we have:
V = 100.0 mL = 0.1 L is the volume of the solution
M = 0.20 is the molarity
So the number of moles of NaOH in the solution must be
[tex]n=MV=(0.20)(0.1)=0.02 mol[/tex]
The molar mass of NaOH is
[tex]M_m = 40 g/mol[/tex]
Therefore, the mass of NaOH needed in the solution is:
[tex]m=nM_m = (0.02)(40)=0.8 g[/tex]
Final answer:
To make 100.0 mL of a 0.20M NaOH solution, the student needs to weigh out 0.800 grams of sodium hydroxide, using the molar mass of NaOH (40.0 g/mol) and the volume of the solution in liters (0.100 L).
Explanation:
The subject of this question is how many grams of sodium hydroxide (NaOH) are needed to prepare a 100.0 mL of 0.20M NaOH solution. To determine the mass required, we use the molarity equation M = moles/L and rearrange it to find the number of moles of NaOH needed, which is Moles = Molarity × Volume (in liters).
First, convert the volume from mL to L:
100.0 mL × (1 L / 1000 mL) = 0.100 L.
Now, calculate the number of moles required for the solution:
0.20 M × 0.100 L = 0.020 mol NaOH.
With the number of moles and the molar mass of NaOH, which is 40.0 g/mol, we can find the mass needed:
0.020 mol NaOH × 40.0 g/mol = 0.800 g of NaOH.
Therefore, the student needs to weigh out 0.800 grams of sodium hydroxide to make their solution.
Which of the following statements is true about cellular respiration?
It converts energy into food.
It breaks down food to release energy.
It turns carbon dioxide into water.
It turns water into carbon dioxide.
Answer:
it breaks down food to release energy
Answer: I believe the answer is B) It breaks down food to release energy!!!!
Which activity will NOT cause an increase in reaction rate?
catalyst
inhibitor
surface area
temperature
Answer:
Inhibitor
Explanation:
Inhibitors generally slow down a reaction rate and prevent the particles from reacting with each other.
It's not the others because:
Catalysts work by lowering the activation energy, which in turn increases the reaction rate as more particles have enough energy to react.
Surface area allows for particles in the reaction to collide more often with each other, which increases the reaction rate.
Temperature increases the speed of particles in the reaction, causing particles to collide more often with each other and therefore increasing the reaction rate.
Inhibitor activity will not cause an increase in reaction rate.
What is rate of reaction?Rate of reaction is defined as the speed at which the chemical reaction takes place defined as the proportional to the increase in concentration of the product per unit time and decrease in concentration of the reactant per unit time.
Rate of reaction is the part of chemical kinetics.
Inhibitors are defined as a substance that decreases the rate of chemical reaction or it may stop the chemical reaction.
Thus, Inhibitor activity will not cause an increase in reaction rate.
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how to find final temperature
Answer:
to Calculate the final temperature of the water mixture using the equation T(final) = (m1_T1 + m2_T2) / (m1 + m2), where m1 and m2 are the weights of the water in the first and second containers, T1 is the temperature of the water in the first container and T2 is the temperature of the water in the second container.
To find the final temperature, use the reciprocal form of Charles's law to relate the initial and final temperatures and volumes of a gas.
Explanation:In order to find the final temperature, we can use the reciprocal form of Charles's law, which relates the initial and final temperatures and volumes of a gas. The equation is T1/V1 = T2/V2, where T1 and V1 are the initial temperature and volume, and T2 and V2 are the final temperature and volume. By rearranging the equation, we can solve for the final temperature:
T2 = (T1 * V2) / V1
Example: If the initial temperature is 20°C, the initial volume is 2 liters, and the final volume is 3 liters, we can substitute these values into the equation to find the final temperature:
T2 = (20 * 3) / 2 = 30°C
The diagram to the right shows energy for two
reactions, A and B.
Which reaction has the higher Gpx?
Answer:
They are the same
I did the activity
Both reaction have same energy. nergy is always assigned based on its nature once it has been transmitted.
What is energy?Energy is the ability to perform work in physics. It could exist in several different forms, such as potential, kinetic, electrical, chemical, thermal, electrical, radioactive, etc. Additionally, there is heat and work, which is energy being transferred form one body to other. Energy is always assigned based on its nature once it has been transmitted.
Motion is a property of all energy types. For instance, if a body is moving, it possesses kinetic energy. Even while at rest, a tensioned object like a spring or bow has the ability to move; this is because of its design, which includes potential energy. Both reaction have same energy.
Therefore, both reaction have same energy.
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What do acids and bases have in common?
O
A. They are both corrosive and can burn skin.
O
B. They both have pH values lower than 7.
O
C. They are both found in many foods.
O
D. They are both commonly used as cleaners.
Acids and bases have similarities such as being A. corrosive and B. They both have pH values lower than 7.
Explanation:Acids and bases have similarities such as being corrosive, having different pH values, and being found in many foods. Acids and bases have several similarities:
Both acids and bases can be corrosive and cause burns. For example, hydrochloric acid is highly corrosive, and sodium hydroxide, a strong base, is also corrosive.Both acids and bases have pH values that are different from neutral. Acids have pH values lower than 7, while bases have pH values higher than 7.Acids and bases are commonly found in many foods. Examples include citric acid in citrus fruits (acid) and sodium bicarbonate in baking soda (base).Therefore, the correct answer is B. They both have pH values lower than 7.
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What happens when a hydrocarbon combusts?
O
A. It reacts with oxygen to produce carbon dioxide, water, and heat.
B. It reacts with carbon dioxide to produce oxygen, water, and heat.
O
c. It breaks apart when heated to form solid carbon and hydrogen
gas.
O
D. It breaks apart when heated, forming gases from its individual
atoms.
The combustion of hydrocarbon results in its reaction with oxygen thereby producing carbon dioxide, water and heat. Thus, option A is correct.
What is combustion?Combustion can be given as the chemical reaction that results with the burning in the presence of oxygen, thereby resulting the oxides and the release of energy.
The hydrocarbon are the compounds with the presence of hydrogen and carbon. Thereby the combustion results in the formation of oxides of hydrogen and carbon that is water and carbon dioxide along with heat. Thus, option A is correct.
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(10 points) What is the empirical formula for a compound that is 54.48% carbon, 13.75% hydrogen, and 31.77 % nitrogen?
The Empirical formula will be for given compound that is 54.48% carbon, 13.75% hydrogen, and 31.77 % nitrogen is [tex]C_2H_6N[/tex] .
Explanation:
The formula which gives the simple whole number ratio of the atoms of various elements present in one molecule of the compound is understood as empirical formula. This can be more appropriately understood by solving the given problem as follows:
The % of elements given as:
C = 54.48%
H = 13.75%
N = 31.77%
The atomic mass of elements given as:
C = 12 g
H = 1 g
N = 14 g
Calculating number of moles as :
[tex]N = \frac{Mass}{Molecular-Mass}[/tex]
[tex]C = \frac{54.48}{12} = 4.54[/tex]
[tex]H= \frac{13.75}{1} = 13.75[/tex]
[tex]N = \frac{31.77}{14} = 2.26[/tex]
Now, we will divide the least number of moles from number of moles of C, H and N respectively, we will round off the values to an integer value:
For C: [tex]\frac{4.54}{2.26} = 2[/tex]
For H: [tex]\frac{13.75}{2.26} = 6[/tex]
For N: [tex]\frac{2.26}{2.26} = 1[/tex]
Hence, C, H and N are in the ratio of 2:6:1, so empirical formula will be for given compound that is 54.48% carbon, 13.75% hydrogen and 31.77 % nitrogen is [tex]C_2H_6N[/tex].
Final answer:
The empirical formula of a compound with a composition of 54.48% carbon, 13.75% hydrogen, and 31.77% nitrogen is C₂H₆N.
Explanation:
To find the empirical formula of a compound with a percent composition of 54.48% carbon, 13.75% hydrogen, and 31.77% nitrogen, follow these steps:
Assume you have 100 grams of the compound, which translates directly to percentages. Therefore, you have 54.48 grams of carbon, 13.75 grams of hydrogen, and 31.77 grams of nitrogen.Convert these masses to moles by dividing by the atomic mass of each element (carbon: 12.01 g/mol, hydrogen: 1.008 g/mol, nitrogen: 14.01 g/mol).Calculate the mole ratio by dividing each element's mole count by the smallest number of moles calculated in step 2.If necessary, multiply these ratios by an integer to get whole numbers for each element. This gives you the empirical formula.For this compound:
Carbon: 54.48 g ÷ 12.01 g/mol = 4.54 molesHydrogen: 13.75 g ÷ 1.008 g/mol = 13.64 molesNitrogen: 31.77 g ÷ 14.01 g/mol = 2.27 molesDivide each by the smallest number of moles, which is for nitrogen (2.27 moles):
C: 4.54 moles ÷ 2.27 moles = 2H: 13.64 moles ÷ 2.27 moles = 6N: 2.27 moles ÷ 2.27 moles = 1The smallest whole number ratio is 2:6:1, which simplifies to 1:3:0.5. Since we need whole numbers, we multiply by 2 to get the empirical formula: C₂H₆N.
How does the value of compare with the concentrations of hydronium ion and hydroxide ion?
Answer:
A. Ka X Kb = [H3O+][OH-]
Answer:
A. Ka x Kb = [H3O+] [OH-]
Explanation:
For which characteristic was this Chinese shar-pei MOST LIKELY selectively bred?
A. fat mass
B. wrinkled skin
C. lean muscle mass
D. frequent skin infections
Answer:
B
Explanation:
because every Chinese shar-pei has wrinkled skin.
Glucose is a simple sugar. What other plant foods and chemicals are made from glucose?
bread, rice, pasta, potatoes, vegetables, fruit, sugar, yogurt, milk, fish, meat, cheese, peanut butter, butter, salad dressing, avocado, and olive oil.
Answer:
Protein, fat, vitamins and oil.
Explanation:
Hope this helps :)
How does an Arrhenius acid change when it
dissolves in water?
Answer:
Explanation:
when dissolved in water, dissociates into ions, including hydrogen ions. According to Arrhenius, an acid can be defined as a material that increases the concentration of hydrogen ions in water.
Arrhenius acid is that acid when dissolve in water, dissociate into ions and give hydrogen ions H+.
What is an Arrhenius acid?An Arrhenius acid is a molecule that donates an H+ in solution when dissolved in water. To put it simply, a proton donor.
The key to identifying an Arrhenius acid is to look for a molecule that begins with the letter H and contains an oxygen or halogen.
Thus, the Arrhenius acid is that acid when dissolve in water, dissociate into ions and give hydrogen ions H+.
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