Which piece of lab equipment is BEST used for storing sulfuric acid for a long period of time? A) soup can B) graduated cylinder C) metal tin with a cover D) glass bottle with a rubber top or stopper
The correct option is D. Glass bottle with a rubber top or stopper Equipment is Best used for storing sulfuric acid for a long period of time.
What is sulfuric acid?Concentrated sulfuric acid is a hygroscopic material that, when in contact with air, absorbs moisture. As a result, it is kept in airtight bottles.
Acid sulfuric (also known as sulphuric acid, battery acid, vitriol, mineral acid and hydrogen sulfate).
The production of fertilizers, pigments, dyes, medicines, explosives, detergents, inorganic salts and acids, as well as petroleum refining and metallurgical operations like plating, anodizing, and steel fabrication all utilize different amounts of acid.
Therefore, The correct option is D. Glass bottle with a rubber top or stopper Equipment is Best used for storing sulfuric acid for a long period of time.
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If an element has three isotopes with known natural abundance percentages, what other information is needed to find the average atomic mass of the element?
The mass of each isotope.
Almost. treating an acyl chloride with a grignard reagent tends to form (via two steps) an alcohol. what reagent forms the ketone product but does not react with the ketone?
To form a ketone from an acyl chloride without further reaction, an organolithium reagent can be used instead of a Grignard reagent, as ketones are relatively resistant to further oxidation.
Explanation:When treating an acyl chloride with a Grignard reagent, the typical product is a tertiary alcohol after the addition of water (hydrolysis step). However, if the objective is to form a ketone without further reaction with the ketone product, a different reagent would be required, such as an organolithium reagent, which acts similarly to Grignard reagents but does not further react with the ketone formed. For example, treating an acyl chloride with an organolithium reagent will yield a ketone through the formation of a ketone intermediate that is not further reactive under the reaction conditions. This is because ketones are relatively resistant to further oxidation and do not have the hydrogen on the carbonyl carbon that is necessary for oxidation.
Given the equation zn(s) + 2 hcl(aq) → zncl2(aq) + h2(g), what mass of hydrogen gas is produced when 2.8 g zn is reacted with excess aqueous hydrocholric acid?
Final answer:
To calculate the mass of hydrogen gas produced, we use stoichiometry of the chemical reaction between Zn and excess HCl. After determining moles of Zn from the given mass, we find the moles of H2, which is equal due to the 1:1 molar ratio, and then multiply by the molar mass of H2 to get 0.0863 g of hydrogen gas.
Explanation:
Calculating the Mass of Hydrogen Gas
To calculate the mass of hydrogen gas produced when 2.8 g of Zn is reacted with excess hydrochloric acid (HCl), we will use the stoichiometry of the balanced chemical reaction: Zn(s) + 2 HCl(aq) → ZnCl₂ (aq) + H₂(g). The reaction shows that one mole of Zn produces one mole of H2. First, we find the molar mass of Zn, which is approximately 65.38 g/mol.
Step 1: Calculate the moles of Zn.
Moles of Zn = (mass of Zn) / (molar mass of Zn) = 2.8 g / 65.38 g/mol = 0.0428 molStep 2: Determine the moles of H2 formed using the molar ratio from the balanced equation (1:1).
Moles of H2 = Moles of Zn = 0.0428 molStep 3: Calculate the mass of H2 using the molar mass of H2 (approximately 2.016 g/mol).
Mass of H2 = Moles of H2 × Molar mass of H2 = 0.0428 mol × 2.016 g/mol = 0.0863 gTherefore, the mass of hydrogen gas produced is 0.0863 g.
define :
elements found in group 17, highly reactive, and gain 1 electron to become stable
Nonmetals form _________ bonds by sharing electrons to complete their valence shell and increase stability.
a.covalent
b.hydrogen
c.ionic
d.metallic
Answer:
The answer is Covalent
Explanation:
What is the main similarity among elements in group 2?
HELPPP WILL GIVE BRAINLIEST
The scientist Robert Boyle observed that a gas can expand to fill its container. Explain how Boyle's observation is explained by the Kinetic Theory of Matter.
What is the total number of moles of electrons lost by the copper as it complete reacts with 8 moles of nitric acid?
The total number of moles of electrons lost by copper when it reacts with 8 moles of nitric acid is 32/3 moles.
Explanation:The total number of moles of electrons lost by copper can be determined by considering the stoichiometry of the reaction. The balanced equation for the reaction between copper and nitric acid is:
3Cu + 8HNO3 → 3Cu(NO3)2 + 2NO + 4H2O
From the balanced equation, we can see that for every 3 moles of copper, 12 moles of electrons are lost. So, if 8 moles of nitric acid react, it means that 8/3 moles of copper are consumed, resulting in 32/3 moles of electrons lost by copper.
The total number of moles of electrons lost by the copper as it completely reacts with 8 moles of nitric acid is 4 moles of electrons.
The reaction is as follows:
[tex]\[ \text{Cu}(s) + 4\text{HNO}_3(aq) \rightarrow \text{Cu(NO}_3)_2(aq) + 2\text{H}_2\text{O}(l) + 2\text{NO}_2(g) \][/tex]
We can write the stoichiometry of the reaction in terms of electrons as:
[tex]\[ \text{Cu}(s) \rightarrow \text{Cu}^{2+}(aq) + 2e^- \][/tex]
Since the reaction ratio is 1 mole of copper to 4 moles of nitric acid, 8 moles of nitric acid will react with:
[tex]\[ \frac{8 \text{ moles of HNO}_3}{4} = 2 \text{ moles of Cu} \][/tex]
Since each mole of copper loses 2 moles of electrons, the total number of moles of electrons lost by 2 moles of copper is:
[tex]\[ 2 \text{ moles of Cu} \times 2 \text{ moles of } e^-/\text{mole of Cu} = 4 \text{ moles of } e^- \][/tex]
However, the total number of moles of electrons lost by copper as it completely reacts with 8 moles of nitric acid. Since the reaction between copper and nitric acid can proceed to form copper(II) nitrate and nitrogen dioxide, the actual reaction that occurs is:
[tex]\[ \text{Cu}(s) + 4\text{HNO}_3(aq) \rightarrow \text{Cu(NO}_3)_2(aq) + 2\text{H}_2\text{O}(l) + 2\text{NO}_2(g) \][/tex]
Therefore, for 2 moles of copper, which is 2 moles of [tex]Cu(NO_3)_2[/tex] produced, the total number of moles of electrons lost is:
[tex]\[ 2 \text{ moles of Cu(NO}_3)_2 \times 2 \text{ moles of } e^-/\text{mole of Cu(NO}_3)_2 = 4 \text{ moles of } e^- \][/tex]
If a gas is heated from 263 to 298 k, the volume is 24 l to 35 l at 1.00 atm pressure. what is the final pressure?
If a gas is heated from 263 to 298 k, the volume is 24 l to 35 l at 1.00 atm pressure. Then, the final pressure is approximately 0.725 atm.
We, can use the combined gas law. This law relates the pressure, volume, and temperature of a gas with the formula (P₁ x V₁)/T₁ = (P₂ x V₂)/T₂, where P is pressure, V is volume, and T is temperature in Kelvin.
First, we will plug in the initial conditions:
Initial pressure (P₁) = 1.00 atmInitial volume (V₁) = 24 LInitial temperature (T₁) = 263 KFinal volume (V₂) = 35 LFinal temperature (T₂) = 298 KWe want to find the final pressure (P₂), so we rearrange the formula to solve for P₂:
After plugging in the values:
P₂ = (1.00 atm x 24 L x 298 K) / (35 L x 263 K)
P₂ ≈ 0.725 atm
Therefore, the final pressure of the gas is approximately 0.725 atm after it is heated and the volume expands.
What mass (g) of nan3 is required to provide 26.5 l of n2 at 22.0 °c and 1.10 atm?
What is the total number of moles (n) of electrons exchanged between the oxidizing agent and the reducing agent in the overall redox equation: 5 Ag (aq) +Mn2 (aq) +4H20()5Ag(s)+ MnO4 (aq) +8H' (aq)
a. 1
b. 2
c. 3
d. 5 (
e.?
The midpoint of GH is M(5,3). One endpoint is G(1,-5). Find the coordinates of the other endpoint H.
The coordinates of the other endpoint, H, can be calculated using the midpoint formula: Endpoint = (2 x Midpoint) - Known Endpoint. Applying this formula, we find that the coordinates of endpoint H are (9, 11).
Explanation:The subject of this question is Mathematics, specifically coordinate geometry. Given the midpoint M(5,3) and one endpoint G(1,-5), we're asked to find the coordinates of the other endpoint, H. The formula to find the coordinates of an endpoint when given the midpoint and another endpoint is as follows:
Endpoint = (2 x Midpoint) - Known Endpoint
So, applying this formula, we find H to be:
H = (2x5 - 1, 2x3 - (-5)) = (9, 11).
So the other endpoint H is at (9, 11).
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If 20.60 ml of 0.0100 m aqueous hcl is required to titrate 30.00 ml of an aqueous solution of naoh to the equivalence point, what is the molarity of the naoh solution?
Answer : The molarity of the NaOH solution is, 0.00687 M.
Explanation :
The balanced chemical reaction will be:
[tex]HCl+NaOH\rightarrow NaCl+H_2O[/tex]
Using neutralization method :
[tex]n_1M_1V_1=n_2M_2V_2[/tex]
where,
[tex]n_1,M_1\text{ and }V_1[/tex] are the n-factor, molarity and volume of acid which is [tex]HCl[/tex]
[tex]n_2,M_2\text{ and }V_2[/tex] are the n-factor, molarity and volume of base which is NaOH.
We are given:
[tex]n_1=1\\M_1=0.0100M\\V_1=20.60mL\\n_2=1\\M_2=?\\V_2=30.00mL[/tex]
Putting values in above equation, we get:
[tex]1\times 0.0100M\times 20.60mL=1\times M_2\times 30.00mL\\\\M_2=0.00687M[/tex]
Hence, the molarity of the NaOH solution is, 0.00687 M.
Which intermolecular force would cause the highest boiling point?
According to the forces of attraction, the hydrogen bonds which are a type of inter molecular forces have the highest boiling point.
What are forces of attraction?
Forces of attraction is a force by which atoms in a molecule combine. it is basically an attractive force in nature. It can act between an ion and an atom as well.It varies for different states of matter that is solids, liquids and gases.
The forces of attraction are maximum in solids as the molecules present in solid are tightly held while it is minimum in gases as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.
The physical properties such as melting point, boiling point, density are all dependent on forces of attraction which exists in the substances.
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Which of the following are monomers of the genetic material DNA?
monosaccharides
fatty acids
nucleotides
amino acids
Answer:
Nucleotides
Explanation:
The monomer units of DNA are nucleotides.
The poh of a solution is 9.32. calculate the hydrogen ion concentration of the solution.
Final answer:
To find the hydrogen ion concentration from the pOH value of 9.32, we first calculate the pH as 4.68. We then use the relationship [H3O+] = 10^-pH to find the hydronium ion concentration, which is approximately [tex]2.09 × 10^-5 M.[/tex]
Explanation:
The student asked about calculating the hydrogen ion concentration of a solution from its pOH. The pOH of a solution is 9.32, and we want to find the [H3O+]ion concentration, also written as [H+].
The relationship between pH, pOH, and ion concentrations in water at 25 °C is given by the equation:
pH + pOH = 14
From the given pOH value, we can find the pH:
pH = 14 - pOH
pH = 14 - 9.32 = 4.68
Once we have the pH, we can calculate the hydronium ion concentration using the inverse of the logarithmic relationship:
[H3O+] = 10-pH
[H3O+] = 10-4.68
The final hydrogen ion concentration, or hydronium ion concentration, is therefore approximately 2.09 × 10-5 M.
What characteristics are shared by all alkali metals and alkaline earth metals? no answer provided
a. they do not react with water at all.
b. they are strong and shiny.
c. they form alkaline solutions when mixed with water.
d. they conduct electricity very well?
Alkali metals and alkaline earth metals share several characteristics: they react with water to form alkaline solutions, they are shiny and have a metallic appearance, and they conduct electricity well.
Explanation:Alkali metals and alkaline earth metals share several characteristics:
They react with water to form alkaline solutions. Alkali metals like sodium and potassium are highly reactive and can vigorously react with water, releasing hydrogen gas and forming alkaline solutions.They are shiny and have a metallic appearance. Alkali metals and alkaline earth metals are good conductors of heat and electricity, which gives them a shiny and metallic appearance.They conduct electricity well. Both alkali metals and alkaline earth metals are good conductors of electricity due to the presence of loosely held outer electrons.Learn more about characteristics of alkali metals and alkaline earth metals here:https://brainly.com/question/12708549
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Describe how to find the atomic number for the element oxygen
Which of these has the highest h+ concentration? lemon juice, ph = 2.3 red wine, ph = 3.2 tomato juice, ph = 4.7 household ammonia, ph = 10.8?
Answer:
Lemon juice has the highest [tex]H^+[/tex] concentration.
Explanation:
The pH of the solution id the negative logarithm of hydrogen ion concentration in an aqueous solution.
[tex]pH=-\log[H^+][/tex]
1) Lemon juice with pH = 2.3
[tex]2.3=-\log[H^+][/tex]
[tex][H^+]=0.005011 M[/tex]
2)Wine with pH = 3.2
[tex]3.2=-\log[H^+][/tex]
[tex][H^+]=0.006309 M[/tex]
3)Tomato juice with pH = 4.7
[tex]4.7=-\log[H^+][/tex]
[tex][H^+]=1.99\times 10^{-5} M[/tex]
4)House hold ammonia with pH = 10.8
[tex]10.8=-\log[H^+][/tex]
[tex][H^+]=1.584\times^{-11} M[/tex]
Lemon juice with a pH of 2.3 has the lowest pH value.
What is the pH scale?The pH scale measures the acidity or alkalinity of a solution, with lower pH values indicating higher acidity and higher pH values indicating higher alkalinity.
For this question, we want to find the solution with the highest H+ (hydrogen ion) concentration, which corresponds to the lowest pH value.
Considering all the options given; Lemon juice with a pH of 2.3 has the lowest pH value, indicating the highest H+ concentration.
Therefore, lemon juice has the highest H+ concentration among the given options.
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which of the following is the correct structural formula for ethene
What are the most elements of the periodic table?
Answer:
noble gases. nonmetals. metalloids.
Explanation:
they have the most elements
Why would the reliability of results collected for an experiment increase when several groups of students conduct the same experiment in class?
A) some groups might make a mistake
B) allows for different hypotheses
C) allows for different conclusions
D) shows that results are consistent
Answer:
D
Explanation:
Gravitational potential energy is the energy something contains due to its ________ the Earth.
A. weight on
B. velocity on
C. position above
D. attraction towards
Questions 18-20 refer to the reaction 2NH3 (g) ↔ N2 (g) + 3H2 (g), and ΔH = 92.2 kJ.
What will be the effect on the concentration of H2 if the temperature decreases?
A. H2 concentration will decrease.
B. H2 concentration will not change.
C. H2 concentration will increase.
D. H2 concentration will not change, but ΔH will decrease
E. H2 concentration will not change, but pressure will increase.
What will be the effect on the concentration of NH3 if the pressure decreases?
A. NH3 concentration will decrease.
B. NH3 concentration will not change.
C. NH3 concentration will increase.
D. NH3 concentration will not change, but ΔH will decrease.
E. NH3 concentration will not change, but entropy will increase.
What will be the effect on N2 if the concentration of NH3 increases? _______
A. N2 concentration will decrease.
B. N2 concentration will not change.
C. N2 concentration will increase.
D. N2 concentration will not change, but ΔH will decrease.
E. N2 concentration will not change, but pressure will increase.
Since the enthalpy of reaction is positive, the
forward reaction is an endothermic reaction which means the energy
is gained from the surrounding to happen the reaction. If the temperature
decreases, according to the Le Chatelier's principle, the system tries to become equilibrium
by increasing temperature. Since forward reaction is endothermic (because of
the bond breaking), the backward reaction is exothermic (because of the bond
making) which releases the energy to the surroundings. This makes the increase
of temperature. So if the backward reaction is promoted because of the decrease
of temperature, then the concentration of H₂ will decrease.
19. Answer is A.
The reactant side has 2 moles/molecules of reactants and the product side has 4 moles/molecules of products which come from 1 N₂(g) and 3 H₂(g). If the pressure is reduced in the system, according to the Le Chatelier's principle, the system tries to increase the pressure. Hence, forward reaction is promoted because of the higher number of molecules in product side. If the forward reaction is promoted, the concentration of NH₃(g) will decreased.
20. Answer is C.
If the concentration of reactant is increased in the system, according to the Le Chatelier's principle, the system tries to reduce the concentration of that reactant. So if NH₃(g) concentration is increased, then to be equilibrium, the forward reaction will be promoted. Then the concentration of N₂(g) will increase.
A solution mass of 1 kg is ___ times greater than 100 g, thus one kilogram (1 kg) of a 2.5% ki solution would contain _____ of ki.
A 1 kg solution is 10 times greater than 100 g, and a 2.5% KI solution with a mass of 1 kg would contain 25 g of KI.
A solution mass of 1 kg is 10 times greater than 100 g. To determine the amount of potassium iodide (KI) in a 2.5% KI solution with a total mass of 1 kg, we can calculate the mass of the solute (KI) by using the percent by mass formula:
Percent by mass = (Mass of solute / Mass of solution) x 100
In this case, the mass of the solute is 2.5% of 1 kg, which can be calculated as follows:
Mass of KI = 0.025 x 1 kg = 0.025 kg or 25 g
This means that a 1 kg solution containing a 2.5% KI would have 25 g of potassium iodide.
Which term refers to an electrochemical cell that produces an electric current?
porous barrier
galvanic cell
electrolytic cell
inert electrode
How many atoms of zinc are in 0.60 mol of zinc? 2. how many moles is 3.52 × 1024 molecules of water? 3. how many atoms are in 2.00 moles of li? 4. how many moles are in 6.02 x 1023 atoms of carbon? 5. how many moles are in 4.9 x 1023 molecules of zncl2?
Final answer:
To calculate the number of atoms, molecules, or moles, we use Avogadro's number (6.02 × 10²³). There are 6.02 × 10²³ atoms in 0.60 mol of zinc. Dividing the number of molecules by Avogadro's number gives us the moles for each compound in the problems posed.
Explanation:
To solve these types of problems, we use Avogadro's number (6.02 × 10²³), which is the number of units in one mole of any substance. This can be atoms, ions, or molecules, depending on the context of the substance in question.
Answers:
There are 6.02 × 10²³ atoms of zinc in 0.60 mol of zinc.To find how many moles 3.52 × 10²⁴ molecules of water represents, divide by Avogadro's number: 3.52 × 10²⁴ molecules ÷ (6.02 × 10²³ molecules/mol) ≈ 5.84 mol of water.For lithium, there are 2 × 6.02 × 10²³ atoms in 2.00 moles of Li, since 1 mol of any element contains exactly 6.02 × 10²³ atoms by definition.Having 6.02 × 10²³ atoms of carbon means you have 1 mole of carbon, as 1 mol is equivalent to Avogadro's number of atoms.To determine the number of moles in 4.9 × 10²³ molecules of ZnCl₂, divide by Avogadro's number: 4.9 × 10²³ molecules ÷ 6.02 × 10²³ molecules/mol ≈ 0.814 mol of ZnCl₂.This is the uneven distribution of bonding electrons in a molecule creating partially positive and negative sides of that molecule. example: water and ammonia have this, but methane does not
Hg(OH)2+H3PO4=Hg3(PO4)2+H2O
The balanced reaction equation can be written as;
[tex]3Hg(OH)_2 + 2H_3PO_4 --- > Hg_3(PO_4)_2 + 6H_2O[/tex]
How to balance chemical reactionBalancing a chemical reaction involves ensuring that the number of atoms of each element is the same on both sides of the equation. Start by writing the unbalanced equation and counting the number of atoms for each element. Begin balancing with the most complex molecules and then move on to balancing other elements.
From the question, we would have to look at the reactants and the products and know the coefficients to add so that we obtain the balanced reaction so we have that the reaction equation is;
[tex]3Hg(OH)_2 + 2H_3PO_4 --- > Hg_3(PO_4)_2 + 6H_2O[/tex]
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