16. Find the molarity (M) of a solution prepared
by diluting 67.5 mL of 6.0 M NaOH to 450 mL.
Answers
Answer:
M = (6.0 M x 67.5 mL) / 450 mL
M = 0.9 M
Related Questions
What can you infer if the fossil of a marine organism is found in an area that is now dry land?
Answers
Answer:
Fossils also help us to infer why dinosaurs and other organisms became extinct. Fossils tell us that there was a mass extinction at the time of the dinosaurs. They died out about 65 million years ago, along with more than half of all the other animal and plant species. ... Without plants, dinosaurs could not survive.
Explanation:
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How different foods affect glucose levels in the body virtual lab.
Carry out the procedures outlined in the virtual lab. In your own words, summarize the steps you used to complete the virtual assignment. Explain what the test (independent) variable was, and what the outcome (dependent) variable was.
What is independent variable and dependent variable? In your own words.
Answers
Answer: this might have something to do with the pancreas
Explanation:
the pancreas produces insulin if subject a produces more insulin than subject b the reaction to the glucose will be different the pancreas breaks down the glucose into sugar and protiens hope this helps
Which statement is true about percent yield
Answers
Which statement best describes echolocation in bats?
O Echolocation helps bats find food only.
O Echolocation helps bats find food and avoid flying into obstacles.
O Echolocation helps bats avoid flying into obstacles only.
O Echolocation is not used in bats.
ANSWER ASAPPP
Answers
Answer:
Explanation:
Echolocation helps bats find food and avoid flying into obstacles
The statement that best describes echolocation in bats is : ( B )
Echolocation helps bats find food and avoid flying into obstacles EcholocationEcholocation in bats is the ability of bats to emit sound waves towards an object and the reflected waves helps the bats to determine the size and distance at which they are towards the object.
Echolocation is common in certain animal species such as bats and dolphins. The importance of echolocation is to help prevent animals like bat from hitting themselves against obstacles and also enables them find and locate their food.
Hence we can conclude that the statement that best describes echolocation is the statement that best describes echolocation in bats is Echolocation helps bats find food and avoid flying into obstacles.
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What process results in a new substance being formed?
Chemical reaction
Physical change
Mixing
Answers
Answer:
Chemical reaction
Explanation:
calculate the osmotic pressure (in atm) at 17.4 degrees c of a solution made by dissolving 7.19 g of glucose in 18.9 ml of solution.
Answers
The osmotic pressure of a solution made by dissolving 7.19 g of glucose in 18.9 ml of solution at 17.4°C can be calculated using the formula: Osmotic Pressure (atm) = Molarity (M) × Gas Constant (R) × Temperature (T).
Molarity = (Mass of Solute/ Molar Mass of Solute) / Volume of Solution
= (7.19 g / 180.2 g/mol) / 18.9 ml
= 0.3999 M
Gas Constant (R) = 0.08206 liter atm/mol K
Temperature (T) = 17.4°C + 273.15 = 290.55 K
Therefore, Osmotic Pressure (atm) = 0.3999 M × 0.08206 liter atm/mol K × 290.55 K
= 0.983 atm
The osmotic pressure of a solution is the hydrostatic pressure required to balance the osmotic pressure of a solution. This is determined by the concentration of the solute molecules, temperature, and the properties of the solvent. The osmotic pressure of a solution can be used to determine the boiling point, vapor pressure, and vapor pressure of a solution. Additionally, it is important for the transport of substances across biological membranes, as well as for the stability of colloidal suspensions.
In summary, the osmotic pressure (in atm) of a solution made by dissolving 7.19 g of glucose in 18.9 ml of solution at 17.4°C can be calculated using the formula: Osmotic Pressure (atm) = Molarity (M) × Gas Constant (R) × Temperature (T), and is equal to 0.983 atm.
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Name the compound containing only fluorine and hydrogen.
The answer is Hydrogen fluoride. Why does hydrogen come first?
Answers
I need some help with this I would really appreciate if you could help out. Thank You
Answers
The type of chemical reaction occuring in the table above is as follows:
DecompositionCombination CombustionSingle replacementDouble displacementWhat is a chemical reaction?A chemical reaction is a process involving the breaking or making of interatomic bonds, in which one or more substances are changed into others.
There are several types of chemical reactions as illustrated in the equation given in the above table. They are as follows:
Decomposition reaction; This involves the breaking down of a large substance into its subsequent parts. Combination reaction: This involves the joining of two or more chemical elements to become one compound. Combustion reaction: It is a process wherein a fuel is combined with oxygen, usually at high temperature, releasing heat.Displacement reaction: In this reaction, one or more element is replaced in a compound by another in a chemical reaction.Learn more about chemical reaction at: https://brainly.com/question/22817140
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a scientist uses 52g of Na2SO4 for a chemical reaction. how many moles of Na atom does the compound contain a) 0.366 b) 0.732 c) 8.422 d)16.845
Answers
Answer:
b). 0.732
Explanation:
52g Na₂SO₄ x 1 mol Na₂SO₄ x 2 mol Na
------------------------- -------------------- = 0.732 mol Na
142.04 g Na₂SO₄ 1 mol Na₂SO₄
Atomic Mass Units
Na₂ = 22.99 x 2 = 45.98
S = 32.06
O₄ = 16 x 4 = 64
Na₂SO₄ = 45.98 + 32.06 + 64 = 142.04
There are 2 moles of Na in 1 mole of Na₂SO₄
Determine the shape, ideal bond angle(s), and the direction of any deviation from those angles for each of the following:
(b) IF₄⁻
Answers
The shape is tetrahedral, ideal bond angle(s) is 60 degree, and the direction of any deviation is away from axis from those angles for IF₄⁻.
What is ideal bond angle?
Bond angles affect how a molecule is structured as well. Bond angles are the angles that connect adjacent lines to form bonds. The bond angle can be used to differentiate between linear, trigonal planar, tetrahedral, trigonal-bipyramidal, and octahedral structures. The VSEPR theory is supported by the ideal bond angles, which demonstrate the maximum angle at which repulsion would be minimized.
In essence, bond angles show that electrons prefer to be far apart. Electrons make up negative ions. The opposites don't attract one another. Now draw a contrast. You don't want to interact with a negative individual because they are often thought of as unpleasant or harsh.
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Which term describes this reaction? addition condensation elimination substitution
Answers
Answer:
Addition
Explanation:edg 2020
Answer:
The correct answer is A.
Explanation:
Edge 2022
what does le chateliter's principle state
Answers
Determinar el volumen de 20 kg de benceno si su densidad es de 0,88g/cm3
Answers
Answer:
volume = mass/ densidad
0.88g/cm3 = 880kg/m3
v=20kg/880kg/m3
v=0.02272727272
o puede ser 0.0227
o tambien puede ser 0.023
in the reaction of acetic acid with aqueous lithium hydroxide what is the spectator ion
Answers
In the reaction of acetic acid with aqueous lithium hydroxide, the spectator ion is lithium ion (Li+).
The balanced chemical equation for this reaction is:
\(CH_3COOH + LiOH\) → \(CH_3COOLi + H_2O\)
Acetic acid \((CH_3COOH)\)reacts with aqueous lithium hydroxide (LiOH) to form lithium acetate \((CH_3COOLi)\) and water (H2O). In this reaction, the lithium ion (Li+) is a spectator ion, meaning that it does not participate in the reaction and remains unchanged on both sides of the equation. Therefore, the spectator ion in the reaction of acetic acid with aqueous lithium hydroxide is lithium ion (Li+).
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Use the solubility curve to match each scenario with its correct saturation level. All scenarios are in 100g of water.
Answers
The curve represents saturation. Below the curve, the water is unsaturated. Above the curve, water is supersaturated. This means that more solute is present than the water can contain.
The line of the solubility curve indicates that the solution is saturated. A saturated solution is defined as a solution in which 100 g of solute is dissolved in 100 g of water. Simulations below this line indicate unsaturated solutions.
The difference between unsaturated and saturated solutes can be determined by adding very small amounts of solute to the solution. In unsaturated solutes, solutes will dissolve, and solutes in saturated solutes will not dissolve. In saturated solutes, crystals will form very quickly around the added solute.
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What is the relationship between arc DE and arc GF
Answers
Answer:
Without any additional information, it is impossible to determine the relationship between arc DE and arc GF. It depends on the specific context or diagram being referred to. In geometry, the relationship between two arcs can vary depending on the shape or configuration of the figure they are part of.
Find the density of a substance that’s had a volume of 24.7mL and a mass of 49.1g. Give the answer with two decimals.
Answers
Answer:
1.99 g/mL
Explanation:
Use the formula d = m/v, where m is the mass and v is the volume.
Plug in the values:
d = 49.1/24.7
d = 1.99 g/mL
Answer:
About 1.99 g/mL
Explanation:
The density of a substance can be found using the following formula:
d= m/v
where m is the mass and v is the volume.
The mass of this substance is 49.1 grams and the volume is 24.7 milliliters.
m= 49.1 g
v= 24.7 mL
Substitute these values into the formula.
d= 49.1 g / 24.7 mL
Divide 49.1 g by 24.7 mL
d= 1.98785425 g/mL
We are asked to round to two decimal places, or the hundredth place. The 8 in the thousandth place tells us to round the 8 to a 9 in the hundredth place.
d ≈ 1.99 g/mL
The density of the this substance is approximately 1.99 grams per milliliter.
At 2500 K, Kp is equal to 20 for the reaction Cl2(g) + F2(g) ⇌ 2 CIF(g) An analysis of a reaction vessel at 2500 K reavealed the presence of 0.18 atm Cl2, 0.31 atm F2, and 0.92 atm CIF. What will tend to happen to CIF as the reaction pro- ceeds toward equilibrium?
Answers
CIF will tend to increase as the reaction proceeds toward equilibrium.
Given that Kp is equal to 20 at 2500 K, we can calculate the initial concentrations of CIF using the ideal gas law. Let's assume the initial volume is 1 liter for simplicity.
For Cl2:
P(Cl2) = 0.18 atm
n(Cl2) = P(Cl2) * V / (RT) = 0.18 mol
For F2:
P(F2) = 0.31 atm
n(F2) = P(F2) * V / (RT) = 0.31 mol
For CIF:
P(CIF) = 0.92 atm
n(CIF) = P(CIF) * V / (RT) = 0.92 mol
Based on the balanced equation, for every 1 mole of CIF, 1 mole of Cl2 and 1 mole of F2 are consumed. Therefore, the initial moles of CIF are equal to the initial moles of Cl2 and F2.
Since the initial concentrations of CIF, Cl2, and F2 are the same, and the reaction is not at equilibrium, we can conclude that CIF will tend to increase as the reaction proceeds toward equilibrium. This is because the reaction favors the formation of CIF, as indicated by the value of Kp. As CIF forms, the concentrations of Cl2 and F2 decrease, driving the reaction in the forward direction to restore equilibrium.
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How can we distinguish between a solution and a colliod. justify by drwaing a table of comparison
Answers
In summary, the main differences between solutions and colloids are particle size, the Tyndall Effect, settling behavior, filterability, and homogeneity.
To distinguish between a solution and a colloid, we can use various properties.
Solution:
1. Homogeneity: Solutions are uniform and transparent.
2. Particle size: The particles in a solution are extremely small (less than 1 nanometer in diameter).
3. Particle dispersion: The particles in a solution are evenly dispersed and do not settle over time.
4. Tyndall effect: Solutions do not exhibit the Tyndall effect, meaning they do not scatter light.
Colloid:
1. Heterogeneity: Colloids are not uniform and can appear cloudy or opaque.
2. Particle size: The particles in a colloid are larger than those in a solution (between 1 and 1000 nanometers).
3. Particle dispersion: The particles in a colloid are not evenly dispersed and can settle over time.
4. Tyndall effect: Colloids exhibit the Tyndall effect, scattering light when a beam is passed through the mixture.
In summary, the main differences between solutions and colloids are particle size, the Tyndall Effect, settling behavior, filterability, and homogeneity.
Solutions have smaller particles and do not exhibit the Tyndall Effect, while colloids have larger particles, exhibit the Tyndall Effect, and may settle over time. Solutions are transparent or translucent, while colloids can be opaque or translucent.
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What causes tectonic plates to move?
A. When the mantle moves, the plates move.
B. When the inner core moves, the plates move.
C. When the outer core moves, the plates move
Answers
This is because magma comes from the mantle and once it becomes lava and hardened, it can turn into land. This causes tectonic plates to shift.
now, you are on your third and final compound this week. but there is something odd about it. your advisor says to recrystallize it by boiling with charcoal. you do it, but you aren’t quite sure why the advisor told you to use charcoal. for what purpose did the advisor tell you to use charcoal?
Answers
The advisor told you to use charcoal for the purpose of decolorizing the compound during the recrystallization process.
Charcoal, also known as activated carbon, is commonly used as a decolorizing agent in chemical processes. It works by adsorbing impurities and colored substances from the compound, resulting in a purer and clearer final product.
In this case, boiling the compound with charcoal helps to remove any impurities or unwanted colors, thereby improving the overall quality of the compound.
This step is particularly important when dealing with compounds that have impurities or are colored, as it helps to enhance the purity and appearance of the final product.
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Identify the atom below.
Be
C
H
He
Answers
Answer:
He
Explanation:
Helium is the only atom on the list with 2 protons and 2 neutrons
in this experiment, you used 45.0 ml of 1.00 m hcl in each trial. calculate the mass of mg that would produce the maximum amount of heat with 45.0 ml of 1.00 m hcl. the molar mass of magnesium is 24.305 g/mol.
Answers
The mass of magnesium that would produce the maximum amount of heat is 0.547 grams.
The chemical reaction between magnesium and HCl is
Mg + 2 HCl → MgCl₂ + H₂
In stoichiometry, the Avogadro's law said that the coefficient for every subtances in the reaction is the ratio for the number of moles for every subtances.
For HCl
The volume = V = 45.0 mL = 0.045 LThe molarity = M = 1.00 MThe number of molesn = MV
n = 1.00 × 0.045
n = 0.045 mol
For Mg
The molar mass = Mr = 24.305 grams/molThe number of molesn Mg : n HCl = 1 : 2
n Mg = n HCl ÷ 2
n Mg = 0.045 ÷ 2
n Mg = 0.0225 molThe mass of Mg
m = n × Mr
m = 0.0225 × 24.305
m = 0.547 grams
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water has a higher surface tension than most liquids because of ____________ bonds its molecules form
Answers
Water has a higher surface tension than most liquids because of hydrogen bonds its molecules form.
Water has a higher surface tension than other liquids due to the relatively high molecular or strong cohesive interactions that occur between its molecules. Hydrogen bonds also make it possible for water molecules to strongly adhere to one another and resist stretching.
The formed links are known as hydrogen bonds, and they cause the water molecules to stick together tightly and have a high surface tension.
A robust and flexible lattice of water molecules is created when several water molecules form hydrogen bonds with one another. High surface tension results from this. Water striders may move across the water's surface thanks to surface tension.
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You observe a car parked on the side of the road. If the car started to move, Which conclusion could you make?
The forces were balanced when the car was parked, but one or more forces changed. The total forces became unbalanced, causing it to move.
The forces were unbalanced when the car was parked. When the car moved, they became balanced.
The forces were balanced when the car was parked. The forces stayed balanced when it moved.
The forces were unbalanced when the car was parked, and two or more forces changed. The forces stayed unbalanced and caused the car to move.
Answers
Answer:
it was stable because of it was in Potential energy and unstable because it was in kinetic energy or vice Versa. im somehow confused
when the liquids wax cools it hardens how is wax Harding similar to liquids water turning to ice?
Answers
What is the percent by mass of iron in FeCl 3 ?
Answers
Answer:
34.429%
Explanation:
You want to make 100mL of a 0.1M KCl solution. How many grams of KCl are needed? Note that the compound consists of potassium and chlorine, not potassium, carbon and iodine.
1). 74.5g
2). 7.45g
3). 0.745g
4). 0.0745g
Answers
According to molar concentration, 0.7455 g of KCl are needed to make 0.1 M KCl solution.
What is molar concentration?
Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.
Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.
In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.
Substituting values in 1st formula mentioned,mass=molarity×molar mass×volume in liters=0.1×74.55×0.1=0.7455 g.
Thus,0.7455 g of KCl are needed to make 0.1 M KCl solution.
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consider a 577.1 g sample of the compound manganese(iv) perchlorate. using the formula mn(clo₄)₄ (mm = 452.74), what is the percent by mass of cl in the compound?
Answers
"The percent by mass of Cl in manganese(IV) perchlorate is approximately 31.33%." Percent by mass, also known as mass percent or weight percent, is a way to express the concentration or composition of a component in a mixture or compound. It represents the ratio of the mass of the component to the total mass of the mixture or compound, expressed as a percentage.
The formula for percent by mass is:
Percent by mass = (Mass of component / Total mass of mixture or compound) × 100
In this formula, the mass of the component refers to the amount of the specific substance, and the total mass of the mixture or compound includes the masses of all the components combined.
To find the percent by mass of Cl in manganese(IV) perchlorate (Mn(ClO₄)₄), we need to calculate the mass of Cl in the compound and divide it by the total mass of the compound, then multiply by 100.
The molar mass of manganese(IV) perchlorate (Mn(ClO₄)₄) is given as 452.74 g/mol.
First, let's calculate the molar mass of Cl in the compound:
Molar mass of Cl = 35.45 g/mol (molar mass of Cl)
Next, we can calculate the mass of Cl in the compound:
Mass of Cl = Molar mass of Cl × Number of Cl atoms in the compound
= 35.45 g/mol × 4
Now, let's calculate the percent by mass of Cl:
Percent by mass of Cl = (Mass of Cl ÷ Total mass of the compound) × 100
= (35.45 g/mol × 4 ÷ 452.74 g/mol) × 100
Calculating this expression:
Percent by mass of Cl = (141.8 g ÷ 452.74 g) × 100
= 31.33%
Therefore, the percent by mass of Cl in manganese(IV) perchlorate is approximately 31.33%.
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maalox and mylanta are both antacids that contain aluminum hydroxide as their active ingredient. write the balanced equation for the neutralization of hydrochloric acid with aluminum hydroxide, al(oh)3. include physical states. neutralization reaction:
Answers
The balanced equation for the neutralization of hydrochloric acid with aluminum hydroxide is, 3HCl(aq) + Al(OH)₃(s) → AlCl₃(aq) + 3H₂O(l).
The neutralization reaction between hydrochloric acid (HCl) and aluminum hydroxide (Al(OH)₃) can be represented by the following balanced chemical equation,
3HCl(aq) + Al(OH)₃(s) → AlCl₃(aq) + 3H₂O(l)
In this equation, the hydrochloric acid (HCl) is in the aqueous state (indicated by "(aq)"), meaning it is dissolved in water. The aluminum hydroxide (Al(OH)₃) is in the solid state (indicated by "(s)"). When the acid and base react, they form aluminum chloride (AlCl₃) in the aqueous state and water (H₂O) in the liquid state.
This reaction is an example of a neutralization reaction, where an acid and a base react to form a salt and water. The aluminum hydroxide acts as a base, as it can accept hydrogen ions (H+) from the acid, and neutralize the acid. The resulting solution will have a neutral pH, indicating that the acid has been neutralized.
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