It is necessary to account for all unused ammunition and return it to a safe storage place or to the concerned authorities for disposal.
What is Ammunition?Bullets, shells and explosives are examples of physical objects that serve as ammunition to project force at a target. These objects are intended to be fired from a weapon such as a gun, rifle, or artillery piece and may be made of a variety of materials such as metal, plastic, or composite materials.
Depending on the weapon and the purpose of the attack, such as whether it is intended for training, target shooting, hunting or fighting, the ammo used will vary. Governments around the world have strict regulations governing ammunition, to ensure its safe handling, movement and application.
Therefore, it is necessary to account for all unused ammunition and return it to a safe storage place or to the concerned authorities for disposal.
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What happens to a buffered solution
when a small amount of base is
added?
Answer: When you add small quantities of an acid or alkali (base) to it, its pH does not change significantly. In other words, the buffer solution stops the acid and base from neutralizing each other.
Answer:
the result is a decrease in the amount of conjugate base present and an increase in the amount of the weak acid.
Explanation:
)A mixture of 0.220 molesCO, 0.350 molesF2and 0.640 molesHehas a total pressure of 2.95 atm.What is the partial pressure ofCO?
The partial pressure of a component gas in a mixture is the pressure that gas would exert if present alone in the vessel at the same temperature as that of the mixture. Here the partial pressure of CO is
The pressure exerted by a mixture of two or more non-reacting gases enclosed in a definite volume is equal to the sum of the partial pressures of the component gases. This is sated by Dalton.
Here partial pressure is:
partial pressure = Mole fraction × Total pressure
Mole fraction of CO = Number of moles of CO / Total moles
n(CO) = 0.220 / 1.21 = 0.181 moles
partial pressure = 2.95 × 0.181 = 0.533 atm
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a 40 ml solution containing .30 M Ti+3 was titrated with 0.75 M Sn+2. what potential at the equivalence point if the resulting solution is
measured against a reference electrode
a 70 piece of metal at 120 C is dropped into a kilometer with 150 g of 30C water the final temperature of the water and little changes 35c what is the specific heat of the metal
Answer:
cm=0.385 J
cm = (0.15 kg x 4.18 J/gCx (35C - 30C)) / (70 pieces x 0.1 kg/piece x (120C - 35C))
The answer is:
cm = 0.385 J/gc
Therefore, the specific heat of the metal is 0.385
A test tube with a cell length of 2.0 cm is filled with a solution that has a molar absorptivity of 0.47 L/(mol*cm)* and a concentration 0.215 M. What should this solutions absorbance be?
/*hint, this L/(mol*cm) is just the unit of molar absorptivity. It will not be included in the calculation
The molar absorptivity of the solution is 1.093 L/(mol*cm).
What is the absorbance of a solution?The Beer-Lambert rule, which states that absorbance is equal to molar absorptivity (a constant that indicates how strongly a material absorbs light) times the substance's concentration times the length of the light's passage through the solution, describes this relationship.
We know that we can use the formula;
A = εcl
A = Absorbance
ε = absorptivity
c = concentration
l = path length
ε= A/cl
ε= 0.47/0.215 * 2
ε = 1.093 L/(mol*cm)
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shapes of simple polyatomic molecules
Answer:
Polyatomic molecules that are linear in shape are known as linear polyatomic molecules. The atoms in these linear molecules are arranged in a straight line (at an angle of 180 degrees). At the central atom of linear geometry polyatomic molecules, the electron pair has sp hybridization.
Including the cis or trans designation, what is the IUPAC name of the following substance?
It is not necessary to put cis or trans in italics.
CH3CH2 CH3
\c=c/
/ \
CH3 H
The IUPAC name of the given substance is (Z)-3-methyl-2-pentene.
The (Z) indicates that the two methyl groups on the double bond are on the same side of the bond, which is cis-configuration. The longest carbon chain in the molecule is five carbons, so it is named as pentene. The double bond is located between the second and third carbon atoms, so it is named as 2-pentene. Since the methyl group is attached to the third carbon atom, it is named as 3-methyl-2-pentene.
The prefix "Z" is used to indicate the cis-configuration of the molecule, where the two substituents on the double bond are on the same side. This nomenclature is important in identifying and describing the structure of organic compounds, particularly in fields such as biochemistry and medicinal chemistry where the structure of molecules plays a crucial role in their function.
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concept of hybridization in chemistry
Answer:
Hybridization is the process in which two complementary single-stranded DNA and/or RNA molecules bond together to form a double-stranded molecule.
Explanation: Hope it helps you:)))))
Have a good day.
Suppose that 0.95 g of water condenses on a 75.0 g block of iron that is initially at 22 °C. If the heat released during condensation goes only to warming the iron block, what is the final tempera- ture (in Celsius) of the iron block? (Assume a constant enthalpy ofvaporizationforwaterof44.0kJmol-1.)
Answer:
The temperature of the iron block is 68.5°C.
Explanation:
The heat released during condensation of water is used to warm the iron block:
q = m_H2O * ΔH_vap = m_fe * c_fe * ΔT
where q is the heat released, m_H2O is the mass of water condensed, ΔH_vap is the enthalpy of vaporization for water, m_fe is the mass of iron, c_fe is the specific heat capacity of iron, and ΔT is the change in temperature of the iron block.
Rearranging the equation gives:
ΔT = (m_H2O * ΔH_vap) / (m_fe * c_fe)
Substituting the given values gives:
ΔT = (0.95 g * 44.0 kJ/mol) / (75.0 g * 0.449 J/(g°C))
ΔT = 46.5°C
Therefore, the final temperature of the iron block is:
T_f = T_i + ΔT = 22°C + 46.5°C = 68.5°C.
The final temperature of the iron block is 68.5°C.
Determine the pH of a solution that is 0.00501 M HCl and 0.0378 M HClO2. The a of HClO2 is 1.1×10−2
.
The acidity or alkalinity of a solution depends on the hydronium ion and hydroxide ion concentration. The pH scale is introduced by the scientist Sorensen. The pH of the solution is -1.90.
The pH of a solution is defined as the negative logarithm to the base 10 of the value of the hydronium ion concentration in moles per litre. The pH of the solution is given as:
pH = -log [H₃O⁺]
Dissociation of HCl is:
HCl + H₂O → H₃O⁺ + Cl⁻
Kₐ = [H₃O⁺][Cl⁻] / [HCl]
1.3 × 10⁶ = x × x / 0.00501
x² = 0.00501 × 1.3 × 10⁶ = 6513
x = √6513 = 80.7 M
HClO₂ + H₂O → H₃O⁺ + ClO⁻
Kₐ = [H₃O⁺][ClO⁻] / [HClO₂]
1.1×10⁻² = x² / 0.0378
x² = 0.0378 × 1.1×10⁻² = 0. 00041
x = 0.020 M
Thus the total concentration now is :
x = [H₃O⁺] = 0.020 + 80.7 = 80.72 M
pH = -log [H₃O⁺]
-log[80.72 ] = -1.90
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Describe how to use Le Chatelier’s principle to predict the possible ways a chemical system can respond to changes.
When an equilibrium system is put under stress, Le Chatelier's principle may constitute used to forecast changes in equilibrium concentrations.
A rule that states that if a system is in equilibrium and a constraint is given to it (such as a change within pressure, temperature, or reactant concentration), the equilibrium will shift and tend to compensate for the effect caused by the constraint. This is Le Chatelier's principle.
When an equilibrium system is put under stress, Le Chatelier's principle may constitute used to forecast changes in equilibrium concentrations. However, the adjustments required to reach equilibrium might not be as evident if we have a combination of reactants and byproducts that are still not at equilibrium.
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A sample of gas occupies 50.0L at 15.0 Cand 640.0 mmHg pressure. What is the volume at STP?
Answer:
2.00 L of a gas is collected at 25.0°C and 745.0 mmHg
Explanation:
Given the following equations and H° values, determine the heat of reaction at 298 K for the reaction: C(s) + 2 H2(g) -> CH4(g)
H2 (g) + 1/2 02 (g) -> H20 (l)
CO2 (g) + 2 H20 (l) -> CH4 (g) + 2 02 (g)
C(s) + O2(g) -›CO2(g)
H kJ = - 393.5
H kJ = -285.8
H kJ = +890.3
The heat of reaction for the reaction C(s) + 2 H2(g) -> CH4(g) at 298 K can be calculated by using the following equation: ΔH = (ΔHf products - ΔHf reactants).
Applying this equation to the given reaction, we get ΔH = (-890.3 + 393.5 + 285.8) kJ = -210.0 kJ.
This is the heat of reaction at 298 K for the reaction C(s) + 2 H2(g) -> CH4(g).
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A solution of KNO3 is prepared by dissolving 80 g KNO3 in 100 g water at 60oC. The solution is
Group of answer choices
dilute
saturated
unsaturated
supersaturated
Which structural formula represents a non polar symmetrical molecule?
The structural formula which represents a nonpolar symmetrical molecule is CH₄ (methane). Option 2 is correct.
Methane is a tetrahedral molecule with four hydrogen atoms surrounding a central carbon atom. Each hydrogen atom is bonded to the carbon atom by a single covalent bond, and all four hydrogen atoms are arranged symmetrically around the carbon atom, resulting in a nonpolar molecule.
On the other hand, NH₄ (ammonium ion) and H₂O (water) are polar molecules. NH₄ has a positive charge on the nitrogen atom, and the hydrogen atoms are arranged tetrahedrally around it, making it a polar molecule. H₂O has a bent or V-shaped molecular geometry with two lone pairs of electrons on the oxygen atom, resulting in an uneven distribution of charge and making it a polar molecule as well.
Hence, 2. is the correct option.
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please answer this question if any one knows
Based on the information, the solubility product of AgCl is 6.91 × 10^-10.
How to explain the informationThe common ion effect concerns the decrease in solubility of a salt when it comes into contact with another compound containing an identical ion within its make-up. This phenomenon is caused by the dependetics that arise from this shared element, which results in a decreasing amount of ions required for dissolving said salt. An illustrative instance is seen when observing the effects of calcium chloride (CaCl2) on calcium sulfate (CsSO4).
Named reactions constitute a subclass of chemical interchanges widely used within organic chemistry. These yield profound utilization due to their notorious titles attributed to notable scientists or related to other respective exploits; they are thus named following mannerisms peculiar to the substance itself.
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Question 10 (1 point)
What mass of iron (III) nitrate, Fe (NO3)3, is needed to prepare a 125 mL solution of
0.250 M?
7.56 grams
60.5 grams
2.68 grams
30.2 grams
The mass of iron (III) nitrate needed to prepare a 125 mL solution of 0.250 M is approximately 7.56 grams.
To calculate the mass of iron (III) nitrate needed to prepare a 125 mL solution of 0.250 M, we can use the formula:
mass (in grams) = volume (in liters) x concentration (in moles/liter) x molar mass (in grams/mole)
First, let's convert the volume from milliliters (mL) to liters (L):
125 mL = 0.125 L
Next, we can use the given concentration of 0.250 M to calculate the number of moles of Fe(NO3)3 needed:
moles = concentration x volume
moles = 0.250 mol/L x 0.125 L
moles = 0.03125 mol
Finally, we can use the molar mass of Fe(NO3)3 to convert from moles to grams:
mass = moles x molar mass
mass = 0.03125 mol x 241.86 g/mol
mass ≈ 7.56 g
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Which of the following is an example of a synthesis reaction? OA. H₂ + Br₂ → 2HBr OB. 2H₂O + 2Na → 2NaOH + H₂ OC. NaCl → Na+ + Cl OD. Mg + H₂SO4 → MgSO4 + H₂
The synthesis reactions are generally exothermic. They release energy in the form of heat and light. In such reactions new compounds are found to be formed. Among the given options, none are synthesis reaction. So the given options are incorrect.
A reaction in which multiple reactants combine together to form a single product is defined as the synthesis reaction. It is a chemical reaction in which two or more simple substances combine to form a more complex compound.
1. H₂ + Br₂ → 2HBr = Redox reaction
2. 2H₂O + 2Na → 2NaOH = Redox reaction
3. NaCl → Na+ + Cl = Dissociation
4. Mg + H₂SO4 → MgSO4 + H₂ = Single replacement
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Please name this compound.
Answer:
3 methyl hexene
Explanation:
Name the property shown.
9. 2 x= x 2
td
11. 7(z+ y) = 7z+ 7y
10. 231= 23
12. a + (2b + 3c) = (a + 2b) + 3c
A soft drink contains 33g of sugar in 349g of H2O. What is the concentration of sugar in the soft drink in mass precent?
The concentration of the sugar in the soft drink in mass percent is 8.64%
How do i determine the concentration in mass percent?First, we shall determine the mass of the solution. Details below:
Mass of sugar = 33 gramsMass of water = 349 gramsMass of solution =?Mass of solution = Mass of sugar + mass of water
Mass of solution = 33 + 349
Mass of solution = 382 grams
Finally, we shall determine the mass percent of the sugar in the solution. Details below:
Mass of sugar = 33 gramsMass of solution = 382 gramsPercentage of sugar =?Percentage = (mass of sugar / mass of solution) × 100
Percentage of sugar = (33 / 382) × 100
Percentage of sugar = 8.64%
Thus, we can conclude that the mass percent of the sugar is 8.64%
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How many moles do 235.5 liters of carbon dioxide
Gas legislation
PV = nRT
where P is atmospheric pressure
Volume (measured in litres)
The number of moles is n.
R = gas constant (0.0821 L atm/(mol K))
Temperature (in Kelvin) equals T.
We need to rearrange the ideal gas law to solve for n:
n = PV / RT
To use this equation, we need to know the pressure, temperature, and volume of the carbon dioxide.
0.002355 moles of carbon dioxide are equal to 235.5 litres of the petrol. As a result, 0.002355 moles of carbon dioxide are equivalent to 0.053 litres.
This is because 1 mole of carbon dioxide is equal to 22.4 litres. This indicates that there are 0.002355 moles of carbon dioxide for every 0.053 litres of carbon dioxide.
Therefore, there are 0.002355 moles of carbon dioxide in 235.5 litres of carbon dioxide.
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Make a drawing representing the reaction that occurs between calcium nitrate and sodium oxalate.
The reaction between calcium nitrate (Ca(NO₃)₂) and sodium oxalate (Na₂C₂O₄) can be represented by the following chemical equation:
Ca(NO₃)₂ + Na₂C₂O₄ → CaC₂O₄ + 2NaNO₃
This is a double displacement reaction, where the calcium ion (Ca²⁺) from calcium nitrate and the oxalate ion (C₂O₄²⁻) from sodium oxalate switch places to form calcium oxalate (CaC₂O₄) and sodium nitrate (NaNO₃). The balanced chemical equation shows that one mole of calcium nitrate reacts with one mole of sodium oxalate to form one mole of calcium oxalate and two moles of sodium nitrate.
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can you please answer these
The balanced reactions are;
NH3 (aq) + HBr (aq) → NH4Br (aq)
PO4^3-(aq) + H3O^+(aq) ----> HPO4^2- (aq)+ H2O(l)
HS^-(aq) + OH^-(aq) ----> H2O(l) + S^2-(aq)
What is a conjugate acid/base?A conjugate acid/base pair consists of two species that are distinct from one another by one proton. The base is the species that can accept a proton, and the acid is the species that can donate a proton. When a base takes a proton, it changes into an acid, and when an acid gives a proton, it changes into a base.
In reaction (1) above, the conjugate acid of NH3 is NH4^+ while the conjugate base of HBr is Br^-.
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2 Pretest Unit 5 Question 22 of 30 Why are there so many carbon-based compounds? O A. Carbon can form compounds with any other element in the periodic table except noble gases. OB. Carbon can form up to six bonds with other carbon atoms and atoms of other elements. OC. Carbon can form single, double, or triple bonds and can bond with itself and other elements. D. Carbon can form ionic, covalent, and metallic compounds under the right conditions. ZA
The why there are so many carbon-based compounds is that B. Carbon can form up to six bonds with other carbon atoms and atoms of other elements.
What is the uniqueness of carbon?Carbon can be described as the element that posses 4 electrons in its outermost shell, and it has the asbility to gain or loss 4 electrons to so it can have nobel gas configuration.
It should be noted that Catenation is one of the unique ability of carbon which help it to form bonds with other atoms of carbon and due to this reason, it have the ability to record a long chains of different types of compounds.
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If you added 50.0 grams of MgSO4 7H₂O to 1.60 liters
of water, what would be the concentration of the
resulting solution? Assume the addition of the 50.0
grams has no significant impact on the volume. (Solutions problem)
The concentration of the resulting solution, given that 50.0 grams of MgSO₄.7H₂O were added to 1.60 liters of water is 0.127 M
How do i determine the concentration of the solution?First, we shall obtain the mole of 50 grams of MgSO₄.7H₂O. This is given below:
Mass of MgSO₄.7H₂O = 50 gramsMolar mass of MgSO₄.7H₂O = 246 g/molMole of MgSO₄.7H₂O =?Mole = mass / molar mass
Mole of MgSO₄.7H₂O = 50 / 246
Mole of MgSO₄.7H₂O = 0.203 mole
Finally, we shall determine the concentration of the solution. Details below:
Mole of MgSO₄.7H₂O = 0.203 mole Volume = 1.60 LitersConcentration of solution = ?Concentration = mole / volume
Concentration of solution = 0.203 / 1.60
Concentration of solution = 0.127 M
Thus, the concentration of the solution is 0.127 M
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The numerical value of the equilibrium constant, Kc, for the following reaction is 1.7×102. If the equilibrium mixture contains 0.21 M H2 and 0.015 M N2, what is the molar concentration of NH3?
3H2(g)+N2(g)⇌2NH3(g)
The molar concentration of NH₃ is 0.17 M.
The equilibrium constant expression for the given reaction is:
Kc = [NH₃]² / ([H₂]³[N₂])We are given Kc = 1.7 × 10² and the molar concentrations of H₂ and N₂ in the equilibrium mixture as 0.21 M and 0.015 M, respectively. Let x be the molar concentration of NH₃ at equilibrium. Then, we can write:
Kc = (x)² / (0.21)³(0.015)1.7 × 10² = x² / 1.84 × 10⁻⁶x² = 3.128 × 10⁻⁴x = 0.017 M or 0.17 M (since there are two NH₃ molecules produced for every three H₂ molecules consumed, we take the square root of the calculated value to get the molar concentration of NH₃)
Therefore, the molar concentration of NH₃ in the equilibrium mixture is 0.17 M.
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A certain flexible weather balloon contains 3.1 L of helium gas. Initially, the balloon is in WP at 8500ft, where the temperature is 23.8oC and the barometric pressure is 564.8 torr. The balloon then is taken to the top of Pike’s Peak at an altitude of 14,100ft, where the pressure is 400 torr and the temperature is 6.9oC. What is the new volume of the balloon at the top of Pikes Peak?
The concept combined gas law is used here to determine the new volume of the balloon. This law relate one thermodynamic variable to another holding everything else constant. The new volume is 4.12 L.
The combination of Boyles law, Charles's law and Avogadro's law gives the combined gas law. This law states that the product of pressure volume and temperature of a system remains constant.
The equation is:
P₁V₁ / T₁ = P₂V₂ / T₂
V₂ = P₁V₁T₂ / P₂T₁
0.7455 × 3.1 × 279.9 / 0.528 × 296.8 = 4.12 L
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HELP ME PLEASE!! I NEED HELP ANSWERING THESE!!
1) Indium and aluminum belong to the same group.
2) Barium belongs to groups 2 and 6
The periodic table is what?The compounds' names are;
Tetrachloro phosphorus chloride
Calcium bromide
Hexasulfur nitrogen
The following molecules balance the charges:
K3P, CaS, Al2O3
Chlorine and fluorine are elements of group 17
Magnesium and salt are the components that make up period 3.
The data are used to create the balanced equations;
Sn + 2H2O = SnO2 + H2
3O2 + 4Al = 2Al2O3
2Au + 3H2S = Au2S3 + 3H2
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pls tysm it is due today
The reaction that is shown by the option D is a balanced reaction equation.
What is a balanced reaction equation?We can say that a reaction equation as we have it balanced number of each of the atoms that we have on the left hand side of the reaction equation is the same as the number of the atoms of the elements that we have on the right hand side of the reaction equation.
A reaction equation is a representation of a chemical reaction using chemical formulas and symbols. It shows the reactants on the left-hand side and the products on the right-hand side of the equation, separated by an arrow.
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Can someone please help? And quickly if you can thank you!
The concept ideal gas equation is used here to determine the number of moles. The ideal gas law is the equation of state of a hypothetical ideal gas. Here the number of moles of gas is 0.17.
The equation which is formed by the combination of Boyle's law, Charles's law and Avogadro's law is called the ideal gas equation. An ideal gas is a theoretical gas composed of a set of randomly moving point particles which interact through elastic collisions.
The ideal gas equation is:
PV = nRT
n = PV / RT
10°C = 283 K
Number of moles is:
n = 1.2 × 3.4 / 0.0821 × 283 = 0.17
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