Answer: D. Alga
Explanation:
What happens when you put one hand in ice water and the other in warm water
When you put one hand in ice water and the other in warm water, the hand in warm water will feel the room temp water cooler, and the hand in cold water feel room temperature water warmer.
What is thermal adaptation?The ability of a body to adjust to temperature is called thermal adaptation. Mammals are the animals who can adjust the temperature of their body.
The reptiles are not able to adjust their body temperature, because they are poikilothermic. They have to take the help of outer environment to adjust their body temperature.
Thus, when you put one hand in ice water and the other in warm water, the hand in warm water will feel the room temp water cooler, and the hand in cold water feel room temperature water warmer.
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Write balanced equations and solubility product expressions for the following compounds cubr zn c2o4 agcro4
The solubility product expressions for the CuBr, ZnC₂O₄ and Ag₂CrO₄ will be represented as [Cu⁺][Br⁻], [Zn²⁺][C₂O₄²⁻] and [Ag⁺]²[CrO₄²⁻] respectively.
What is solubility product expressions?The solubility product expression or constant is denoted by Ksp, and it is the equilibrium constant for a solid substance dissolving in an aqueous solution.
Balanced chemical reaction of CuBr is CuBr → Cu⁺ + Br⁻ and value of Ksp will be written as Ksp = [Cu⁺][Br⁻].Balanced chemical reaction of ZnC₂O₄ is ZnC₂O₄ → Zn²⁺ + C₂O₄²⁻ and value of Ksp will be written as Ksp = [Zn²⁺][C₂O₄²⁻].Balanced chemical reaction of Ag₂CrO₄ is AgCrO₄ → 2Ag⁺ + CrO₄²⁻ and value of Ksp will be written as Ksp = [Ag⁺]²[CrO₄²⁻].Hence balanced equations with solubility product expressions will be shown above.
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Para preparar una disolucion de concentracion 5% v/v de acido clorhidrico se debe?
Para preparar una disolución de concentración 5% v/v de ácido clorhídrico se debe usar 96 ml de HCl (0.5 M) por cada dos litros de agua.
¿Cómo preparar una solución de HCl al 5% v/v?El porcentaje volumen a volumen (v/v) depende del volumen de soluto, en este caso HCl, y de solvente, en este caso, agua.
La masa molar de HCl es 36,4 gramos (g) por cada mol, lo cual indica que 1 mol de HCl representan 36,4 g.
En conclusión, para preparar una disolución de concentración 5% v/v de ácido clorhídrico se debe usar 96 ml de HCl (0.5 M) por cada dos litros de agua.
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Which of the following mixtures is not a colloid? gradpo!nt
paint
milk
fog
sugar water
Milk
Explanation:
because milk is very thick youknow here I go
please answer this for me asap! Was the erosion in this image a result of physical or chemical weathering?
Physical weathering i s the weathering happens due to force of water, ice or wind, and chemical weathering is the force of the rocks into the other rocks.
What is chemical and physical weathering?Chemical weathering is the erosion of rocks due to the force of water, air, or ice or other weathering elements.
Physical weathering is the erosion done by the force of other rocks into the rocks.
Thus, physical weathering i s the weathering happens due to force of water, ice or wind, and chemical weathering is the force of the rocks into the other rocks.
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Force, mass, and acceleration have to do with which law of motion?
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Newton's 4th Law
Newton's law of motion states the relationship between the force acting on the body in motion. The relation between force, mass, and acceleration is given by Newton's second law.
What is Newton's second law?Newton's second law states the relationship between mass, force, and acceleration. It relates the force with the change of the motion of an object with a mass.
Newton's second law is given as,
[tex]\rm F = ma[/tex]
Where F is force, m is the mass of the object and a is the acceleration.
Newton's first law is about inertia, the third law is about the law of action and reaction, and the fourth law is about the law of gravitation.
Therefore, option B. Newton's second law states the relationship between force, mass, and acceleration.
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Oxalic acid (h2c2o4) has a ka of 5. 9×10−2, while the hydrogen oxalate anion (hc2o−4) has a ka of 6. 1×10−5. Is an aqueous solution of a hydrogen oxalate salt (e. G. Nahc2o4) acidic, basic, or neutral?
Resultant aqueous solution of a hydrogen oxalate salt is basic in nature.
What is pH?pH scale is used to determine the acidity, basicity or neutral nature of any solution.
Values from 0 to 6.9 shows the acidity. 7 shows the neutrality.And 7.1 to 14 shows the basicity.Chemical equation for the given salt in an aqueous solution will be shown as:
NaHC₂O₄ + H₂O → NaOH + H₂C₂O₄
From the equation it is clear that reaction produces-
NaOH which is a strong base andH₂C₂O₄ oxalic acid which is a weak acid.So that resultant solution is basic in nature.
Hence the aqueous solution of salt is basic.
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Answer:
acidic
Explanation:
The HC2O−4 ion is amphiprotic.
As an acid, it has the given Ka2 of HC2O−4 is 6.1 × 10^−5.
To find the Kb, use the relationship between Ka1 and Kb for the conjugate acid of a base.
The Kb of HC2O−4 is 1.0 × 10^−14 / 5.9 × 10^−2 ≈ 1.7 × 10^−13.
Since Ka2 > Kb, the solution is acidic.
Can chlorine become sulfur
2 Use the chart to answer the question. Solubility Curves of Various Salts 180 160 140 120 100 80 KNO3 in g NaCl in g KCl in g Amount of Solute Dissolved in 100 g of Water (grams) 60 40 20 20 40 60 80 100 1200 20 Temperature (°C) If a student makes a saturated solution of potassium nitrate at 80°C, then cools it to 20°C, how many grams of solute would precipitate out of the solution? MO A B C D 10 g 20 g 60 g 140 g
According to the information in the graph, it can be inferred that the amount of solute that will precipitate out of solution at 20°C is 130 grams.
How to calculate the amount of solute that precipitates out of solution?To calculate the amount of solute that precipitates out of solution we must identify the solute data at 80°C and 20°C and identify the difference as shown below:
Quantity of solute at 80°C: 170 grams.Quantity of solute at 20°C: 40 grams.170 grams - 40 grams = 130 gramsAccording to the above, the amount of solute that will precipitate out of solution due to the change in temperature is 130 grams of KNO3.
Note: This question is incomplete because the graph is missing. Here is the graph
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How many moles of aluminum sulfate, al2(so4)3, could be produced from 32. 7 grams of aluminum nitrate, al(no3)3?
The moles of aluminum sulfate that could be produced from 32.7 grams of aluminum nitrate is 0.07 moles.
What is the relation between mass & moles?Relation between the mass and moles of any substance will be represented as:
n = W/M, where
W = given mass of aluminum nitrate = 32.7g
M = molar mass of aluminum nitrate = 213 g/mol
Moles of aluminum nitrate = 32.7 / 213 = 0.154 mol
Given chemical reaction is:
3Na₂SO₄(aq) + 2Al(NO₃)₃(aq) → Al₂(SO₄)₃(s) + 6NaNO₃(aq)
From the stoichiometry of the reaction it s clear that,
2 mole of Al(NO₃)₃ = produces 1 mole of Al₂(SO₄)₃
0.154 mole of Al(NO₃)₃ = produces (1/2)(0.154)=0.07 mole of Al₂(SO₄)₃
Hence produced moles of aluminum sulfate is 0.07 moles.
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Compare and contrast histosols and aridosols, the soils of bogs and peat marshes versus those of deserts and arid regions respect
Answer:
The histosols of peat pogs are soils rich in organic material but poor in mineral nutrients, and are not fertile. Conversely, aridosols (desert soils) have an abundance of mineral nutrients but a dearth of organic matter and are also not fertile.
hope i help✨!
425 mL of a gas is collected at 1,100 mmHg. What will the volume be at standard
pressure?
Answer:
615.13 ml
Explanation:
P1 V1 = P2 V2
1100 * 425 = 760 * V2
V2 = 615.13 ml
Is methyl benzoate neutral? And what is it soluble in (NaOH, HCl, NaHCO3)?
ANSWER THIS PLS!!!!!!
For reactant side
Zinc is neutral so oxidation no is 0For product side
Oxidation no ne x
x+2(-1)=0x-2=0x=+2Loss of electron is oxidation
Option B
What volume of hydrogen (in l) is produced
from the complete reaction of 56.49 g of
magnesium metal at stp?
Answer:
50.228L of H2.
- Explain how ionic bonds, covalent bonds, and metallic bonds each form and how.
- Compare naming conventions of ionic compounds and covalent compounds.
- Explain how to balance chemical equations and be prepared to solve an equation over
the phone.
- Describe each type of reaction that can take place.
- Explain the factors that affect reaction rates.
pls help!
Answer: -Ionic bonds form when one atom provides electrons to another atom. Covalent Bonds: Covalent bonds form when two atom shares their valence electrons. Metallic Bonds: Metallic bonds form when a variable number of atoms share a variable number of electrons in a metal lattice.
-Covalent Bonds.
Covalent Compounds. Contain no metals and no ions. Covalent compounds contain nonmetals only.
Example:
Ionic Compounds. A metal with a non-metal. Doesn't use prefixes for naming. Name the metal and change the nonmetal ending to -ide.
Explanation: Ionic bonds form when a nonmetal and a metal exchange electrons, while covalent bonds form when electrons are shared between two nonmetals. An ionic bond is a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions.
The definition of the acceleration states that an object accelerates when it
PLEASE HELP!!!
Maybe this can help.
In mechanics, speed increase is the pace of progress of the speed of an article regarding time (acceleration). Speed increases are vector amounts (in that they have greatness and direction). The direction of an item's speed increase is given by the direction of the net power following up on that article. The size of an item's speed increase, as depicted by Newton's Second Law, is the consolidated impact of two causes:
the net equilibrium of all outer powers acting onto that item — size is straightforwardly relative to this net coming about force;
that article's mass, contingent upon the materials out of which it is made — extent is conversely relative to the item's mass.
There are two ways of thinking about it:
First way: The definition of the acceleration states that an object accelerates when it has a force applied to itSecond way: The definition of the acceleration states that an object accelerates when it changes its velocityReasons
For the first way, by newton's second law, force equals to the product of mass times acceleration. The mass of the objects stays constant thus it is a constant in this equation. Thus when the Force isn't zero or bascially when it is applied, then the object must accelerateFor the second way, acceleration is the rate of change of velocity, thus as velocity changes, the object must be acceleratingHope that helps!
ANSWER ASAP!!!! PLEASE
Answer:
single replacement
Explanation:
The H2 in the sulfuric acid is replaced by the solid zn to form the salt zinc sulfate, ejecting the hydrogen ions which become an h2 molecule. This is also a redox reaction as Zn is oxidized and the H+ ions are reduced.
what is the number of grams of sodium acetate (NaC2H3O2) will you produce from 5.14 mole of sodium bicarbonate (NaHCO3)
Taking into account the reaction stoichiometry, 421.48 grams of NaC₂H₃O₂ are formed from 5.14 mole of sodium bicarbonate.
Reaction stoichiometryIn first place, the balanced reaction is:
HC₂H₃O₂ + NaHCO₃ → NaC₂H₃O₂ + CO₂ + H₂O
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
HC₂H₃O₂: 1 mole NaHCO₃: 1 mole NaC₂H₃O₂: 1 mole CO₂: 1 mole H₂O: 1 moleThe molar mass of the compounds is:
HC₂H₃O₂: 60 g/moleNaHCO₃: 84 g/moleNaC₂H₃O₂: 82 g/moleCO₂: 44 g/moleH₂O: 18 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
HC₂H₃O₂: 1 mole ×60 g/mole= 60 gramsNaHCO₃: 1 mole ×84 g/mole= 84 gramsNaC₂H₃O₂: 1 mole ×82 g/mole= 82 gramsCO₂: 1 mole ×44 g/mole= 44 gramsH₂O: 1 mole ×18 g/mole= 18 gramsMass of sodium acetate formedThe following rule of three can be applied: if by reaction stoichiometry 1 mole of NaHCO₃ form 82 grams of NaC₂H₃O₂, 5.14 moles of NaHCO₃ form how much mass of NaC₂H₃O₂?
[tex]mass of NaC_{2} H_{3} O_{2} =\frac{5.14 moles of NaHCO_{3}x82 grams of NaC_{2} H_{3} O_{2}}{1 mole of NaHCO_{3}}[/tex]
mass of NaC₂H₃O₂= 421.48 grams
Then, 421.48 grams of NaC₂H₃O₂ are formed from 5.14 mole of sodium bicarbonate.
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HELP
The question is in the picture, I will give 5 stars!
The answer is 4.9 moles of salt will be needed to add to 1 kg of water to change the boiling point by 5 °C.
What is Boiling Point Elevation ?Boiling point elevation is the phenomenon that occurs when the boiling point of a liquid (a solvent) is increased when another compound is added, such that the solution has a higher boiling point than the pure solvent.
Boiling point elevation occurs whenever a non-volatile solute is added to a pure solvent.
ΔT = i * Kb * m
where m, Kb and i are the molality of solution, ebullioscopic constant and Van't Hoff factor respectively
The data given in the question is ΔT = 5 °C
mass of solvent = 1 kg
Kb = 0.51 °C/(mol/kg)
Van't Hoff Factor for NaCl is 2
Substituting the values in the above equation
[tex]\rm 5 = \rm\dfrac{2\times0.51\times moles \;of \;salt}{1}[/tex]
[tex]\rm moles \;of \;salt = \rm\dfrac{5}{2\times0.51}[/tex]
moles of salt = 4.9
Therefore 4.9 moles of salt will be needed to add to 1 kg of water to change the boiling point by 5 °C.
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what is the photoeletric effect
Answer:
photoelectric effect, phenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation. The effect is often defined as the ejection of electrons from a metal plate when light falls on it.
Answer: The Photoelectric Effect occurs when a light withdraws an electron from a metal. The light must have at minimum the necessary energy to expel a particle from the surface of the metal. As a lack of a better description, consider sodium metal.
Explanation:
how many grams of H2O2 are in 3 moles of H2O2?
Answer:
The answer is 102.3!
Explanation:
you get this by multiplying 34.1 x 3 to get 102.3.
Wondering why you multiply 34.1 times 3?
WELLLLLLLLLLL...
when you get 1 mole of h202, you get 34.1 so if you ask for 3 moles of H202, you get 102.3!
describe how amino acids are categorized by their chemical properties
Amino acids are categorized by their chemical properties on the basis of the sequence of side chain (R group).
What are amino acids?Amino acids are known as the 'building blocks of the life' as they help in the formation of proteins inside the body.
Side chain of amino acids is specific in nature and are known by the name of R group, these R groups are attached with the alpha carbon atom. R groups characterizes below properties of the molecule:
ShapeSizeCharge andReactivityHence R group describes the chemical properties of amino acids.
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Identify the group numbers of the following elements: a) noble gases b) alkali metals c) alkaline earth metals d) halogens
Answer:
noble gases: 18
alkali earth: 2
alkali: 1
halogens: 17
What is the action force on a hot air balloon?
balloon stays in place
balloon tilts sideways
balloon descends
balloon rises
Action and reaction forces are Newton's law of motion. The action force on the hot air balloon makes them rise.
What is Newton's third law?Newton's third law or the law of action and reaction is present that allows describes the force applied to the object in opposite and equal in magnitude when the two objects interact mutually.
The action force is the force applied with a magnitude and in a direction opposite to the reaction force of the object. In the case of hot air balloon action, force is applied from down to the upper direction that allows the balloon to rise.
Therefore, the action force option D. allows the hot air balloon to rise.
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Does this chemical equation satisfy the Law of Conservation of Mass? CS 2 +O 3 -->CO 2 +SO 2
Yes or no
Answer:
No it doesn't satisfy the Law of Conservation of Mass.
Explanation:
A balanced chemical equation obeys the law of conservation of mass.
Select the correct structure that
corresponds to the name.
4-chloro-2-hexene
Please help asap
What are the strongest attractive forces that must be overcome to boil chloroform (chcl3)
Intermolecular forces are the forces present between ions, atoms, and molecules. Dipole-dipole is the attractive force that must be overcome.
What are attractive forces?Attractive forces are the intermolecular forces present between the molecules and bind them together. Dipole-dipole forces, London dispersion forces, Hydrogen bonding, and Induced-dipole forces are types of attractive intermolecular forces.
Dipole-dipole forces are the attractive forces that are present between the positive of the polar and the negative of the nonpolar molecule. The chloroform molecule is polar and has strong dipole interaction.
Therefore, dipole-dipole forces must be overcome.
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Which of the following statements is not true for Coulomb's law?
A.
The force will decrease if the distance is decreased.
B.
The electric force depends partly on the amount of charge.
C.
Doubling one of the charges will double the force if the distance remains constant.
D.
The electric force depends on both amount of charge and distance between them.
Answer:
A
Explanation:
just took the test
The following statements is not true for Coulomb's law is:
A. The force will decrease if the distance is decreased.
Coulomb's law describes the electrostatic force between two point charges. The law states that the force between two charges is directly proportional to the product of their magnitudes and inversely proportional to the square of the distance between them.
Mathematically, Coulomb's law is expressed as:
F = k * (|q1| * |q2|) / r²
Where:
F is the electrostatic force between the two charges q1 and q2.
k is Coulomb's constant, a proportionality constant with a value of approximately 8.99 x 10⁹ N m²/C² in a vacuum.
|q1| and |q2| are the magnitudes (absolute values) of the two charges.
r is the distance between the two charges.
Now let's analyze statement A:
A. The force will decrease if the distance is decreased.
This statement is incorrect. According to Coulomb's law, as the distance (r) between the two charges decreases, the force (F) between them increases. The force is inversely proportional to the square of the distance (r²). As the distance becomes smaller, the denominator of the Coulomb's law expression (r²) decreases, causing the force to increase.
Conversely, if the distance between the charges increases, the force between them decreases. The force decreases with the square of the distance.
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When 0. 054 moles of ammonium sulfate ((nh4)2so4) are dissolved in enough water to make 667 milliliters of solution, how many ammonium ions are present?
The number of ions of ammonium are 6.48e + 22.
What are moles?
The mole is a SI unit of measurement that is used to calculate the quantity of any substance.
You have 0.07 mols (NH4)2SO4.
There are [tex]6.022 \times 10^2^3[/tex] present in one mole of (NH₄)₂SO₄, so for 0.054 moles, there will be
[tex]6.022 \times 10^2^3 \times 0.054 = 3.24 \times 10^2^2[/tex]
Since there are two ammonium in 1 molecule of ammonium sulfate, there will be twice ions present in an ammonium sulfate molecule.
[tex]3.24 \times 10^2^2 \times 2 = 6.48e +22[/tex]
Thus, the number of ions are 6.48e + 22.
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