among these properties of acids basses or both which property is specific to acids only? A. accepts protons B. bitter taste C. electricity conductive D. slippery feel

Answer:

Combination reaction

This reaction is a combination reaction because calcium oxide and water combine to create calcium hydroxide as the only result.

An inorganic substance called calcium hydroxide has several uses. It is also known as slaked lime, and limewater is the name of its aqueous solution.

Calcium hydroxide has the chemical formula Ca in both its composition and structure (OH)

2

and it has a 74.09 g/mol molar mass.

The calcium metal cation is linked to two hydroxide anions in this ionic molecule. Calcium hydroxide has a polymeric structure in its solid state, which is made possible by hydrogen bonds between the layers.

The mineral portlandite, a naturally occurring but seldom type of calcium hydroxide, is present in various volcanic and metamorphic rocks.

In order to make calcium hydroxide for use in industry, calcium oxide (lime or quicklime) is reacted with water.

CaO + H

2

O → Ca(OH)

2

On lesser scales, it may also be produced through the reaction of aqueous calcium chloride and sodium hydroxide.

Physical characteristics: It has a melting point of 580 °C and can be found as white powder or colorless crystals with a density of 2.21 g/cm3.

Chemical characteristics: Water may rather easily dissolve calcium hydroxide. It partly dissolves in water to create limewater, a moderately basic solution. Ca(OH)2 solution or limewater

salts when combined with acids, and it can corrode various metals, including aluminum. The process of carbonatation, which produces calcium carbonate from limewater and carbon dioxide, is advantageous:

Ca(OH)2+ CO2→ CaCO3+ H2O

Uses: Calcium hydroxide is used in a wide range of industrial processes, including the production of Kraft paper, water and sewage treatment, the production of ammonia, and pH adjustment. Additionally, it is a crucial component of mortars, cement, and plaster. It may be used in the food business for a variety of purposes, including pH correction, calcium fortification, digestion help, and baking soda replacement because it is a relatively non-toxic and gentle base.

Calcium hydroxide is not poisonous at low doses and poses no safety risks. However, inhaling, eating, or coming into touch with the aqueous calcium hydroxide solution at greater concentrations might result in lung damage, chemical burns, blindness, or serious skin irritation.

The rate law uses the molar concentrations of reactants to determine the reaction rate. Hence, option (C) is the correct option

A rate law shows how the rate of a chemical reaction depends on reactant concentration.

For a reaction such as aA → products, the rate law generally has the form

rate = k[A]ⁿ,

where,

Typically, increased concentrations of reactants increases the speed of the reaction, because there are more molecules colliding and reacting with each other.

Hence , The rate law uses the molar concentrations of reactants to determine the reaction rate. Hence, option (C) is the correct option

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Decreasing the separation between the two magnets will result in increase in the magnetic force between two magnets.

This is referred to a substance which produces magnetic field and result in the attraction and repulsion of certain types  of things.

Increase in the separation will reduce the magnetic force and vice versa which is why option A was chosen.

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Answer

Q = mcΔT

Qwater = -Qmetal

(100 g)(4.18 J/g°C)(25°C - 20°C) = -(50 g)c(25°C - 90.0°C)

2090 J = (3250 g °C)c

c = 0.643 J/g °C

.

Which buffer can be suitable to prepare a solution that needs to be buffered at pH 4? Explain your

choice.

A. Formic acid/Formiate buffer

B. Carbonic acid/Bicarbonate buffer

C. Ammonia/Ammonium buffer

D. Any buffer will work.

E. None of the buffers will be suitable.

34 Which of the following will form a buffer when mixed together? Explain a weak acid/base and its conjugate base/acid in the form of salt

Answer:

The moles of H2 is 230-two hundred and thirty

Sucrose doesn't show appreciable dissociation in water, so i≈1 in this case. by extension, −7.3°C is the approximate freezing point of this solution.

The temperature at which a liquid solidifies.

Sucrose doesn't show appreciable dissociation in water, so i≈1 in this case. by extension, −7.3°C is the approximate freezing point of this solution.

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Answer:

Explanation:

To solve problems like this, the very first thing to do is to write out the balanced equation for the process. The reaction is

Zn(s) + HCl(aq) → ZnCl2(aq) + H2(g)

and the balanced equation is

Zn(s) + 2 HCl(aq) → ZnCl2(aq) + H2(g)

So, by examining the stoichiometry, you can see that for every mole of Zn, two moles of HCl will be required. In turn, we need to know the number of moles of Zn is represented by 10.4 g. The molecular weight of Zn is 65.38 g/mol so

moles of Zn = 10.4 g/65.38 g/mol = 0.159 moles

and, twice as many moles of HCl is required so

# of moles of HCl required = 2 * 0.159 = 0.318 moles

Answer:

3.76375e+22

Explanation:

(2/32)×(6.022 × 10^23)

2Fe(s) + 3Cl₂(g) →2FeCl₃(s)

mol Fe = 15.52 : 56 g/mol = 0.277

mol FeCl₃ = mol Fe = 0.277 (same coefficient)

mass FeCl₃ = 0.277 x 162.2 g/mol = 44.93 g

% yield = 34.5 : 44.93 = 76.79 %

non-polar

Explanation :

Hydrogen and carbon have similar electronegativity values, so the C—H bond is not normally considered a polar covalent bond.

If two objects at different temperatures are brought in contact with each other, energy is transferred from the hotter object to the colder object.

The total energy of an isolated system remains constant irrespective of whatever internal changes may take place with energy conevrting in one form and reappearing in another.

When two substances at different temperatures come into contact, the substance with a higher temperature will transfer heat energy to the substance with a lower temperature, until their temperatures get equal.

Here, if the two substances are isolated then the law of conservation of energy states that the when heat released by the substance with a higher temperature is the same amount of heat gained by the substance lower a lower temperature.

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Answer:

A

Explanation:

The concentration terms are molality, normality and mole fraction. Molarity can be used to find out the ionic strength of any solution. Therefore, 0.80g of Fe(NO[tex]_3[/tex])[tex]_3[/tex] are present in a 20.0 mL sample of a 0.500 M solution.

Molarity can be calculated by dividing number of moles of solute by volume of solution in litre. Molarity is affected by temperature. Its unit is mole/liter. It measure the concentration of any solute in a solution.

Mathematically,

Molarity= number of moles of solute/volume of solution in litre (1)

Where,

moles= given weight /by molecular weight

         = w/241.8

Substituting values in equation 1

0.500= (w/241.8)/(20.0 /1000)

w=0.80g

Therefore, 0.80g of Fe(NO[tex]_3[/tex])[tex]_3[/tex] are present in a 20.0 mL sample of a 0.500 M solution.

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Answer: A. A bond in which molecules share electrons

Answer:

C

Explanation:

Marble is the correct answer

No matter how big or little a material is, its properties remain the same. Size, form, color, and mass are the qualities that distinguish a material from non-substances. All of these qualities, including size, shape, color, and mass, can be seen and measured. Some characteristics are physical, while others are chemical. Physical characteristics include mass, volume, density, and color.  Viscosity and solubility are examples of chemical qualities.

The mass in grams of each of the following using dimensional analysis is:

The mass of a substance can be calculated in different ways depending on whether molecules or moles are given.

First, we need to convert atoms/formula units/molecules to moles as follows:

Next, we convert each mole value to mass as follows:

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Answer:

I think the answer is "newer strains of pesticide - resistant pests may develop" as I learnt in Biology, but I'm not sure as I don't know anything about corn plants.

Explanation:

Answer:

newer strains of pesticide

Explanation:

The FORMULA for the limiting reagent is [tex]ZnOH_2[/tex].

4.27 grams of reactant remains after the reaction is complete.

The limiting reagent is the reactant that is completely used up in a reaction and thus determines when the reaction stops.

Given data:

Mass of sulfuric acid = 41.0 grams

Molar mass of sulfuric acid = 98.08 g/mol

Mass of zinc hydroxide = 36.5 grams

Molar mass of zinc hydroxide = 99.424 g/mol

Step 1:moles sulfuric acid = mass sulfuric acid / molar mass sulfuric acid

moles sulfuric acid = 41.0 grams / 98.08 g/mol

moles sulfuric acid = 0.41 moles

Step 2: moles of zinc hydroxide

moles zinc hydroxide = 36.5 grams / 99.424 g/mol

moles zinc hydroxide =0.367 moles

Step 3: Calculate limiting reactant

zinc hydroxide is the limiting reactant. It will completely be consumed.

There will remain 0.41 moles - 0.367 moles = 0.043 moles

This is 0.043 moles x 99.424 g/mol

= 4.27 grams

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The concentration of the solution is 0.17M

The missing question is

What is the concentration of the solution ?

Molarity is the moles of solute in 1 liter of solution.

It is the measure of concentration of a solution in mol/l .

It is given that

5 grams of sodium chloride is dissolved to make 0.5 L of solution

the concentration of the solution

Molecular weight of Sodium Chloride = 58.44 g

58.44 g of NaCl = 1 mol

5g of NaCl = 5/58.44 = 0.086 moles

Molarity = 0.086 / 0.5

Molarity = 0.17 M

The concentration of the solution is 0.17M

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Due to the presence of three unpaired electrons, phosphorus is paramagnetic.

Electronic configuration of Phosphorus:-

[Ne] 3S2  3P3

By looking at a substance's electron configuration, one can identify whether or not it has magnetic qualities. If a substance has unpaired electrons, it is paramagnetic; if all of its electrons are paired, it is diamagnetic.

A tiny, positive susceptibility to magnetic fields exists in materials. When exposed to a magnetic field, these materials are only weakly drawn to it; once the external field is removed, they lose their magnetic qualities.

A weak, negative sensitivity to magnetic fields exists in materials. When exposed to a magnetic field, diamagnetic materials are partially repulsed and lose their magnetic properties when the external field is removed.

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It takes 31 s for 1.27 M H₃PO₄ to decrease its concentration to 7.0% of its initial value following first-order kinetics.

First-order kinetics occur when a constant proportion of a reactant disappears per unit time.

Let's consider the following first-order kinetics reaction with a rate constant k = 0.086 s⁻¹.

2 H₃PO₄(aq) = P₂O₅(aq) + 3 H₂O(aq)

Given the initial concentation is [H₃PO₄]₀ = 1.27 M, the concentration representing 7.0% of this value is:

[H₃PO₄] = 7.0% × 1.27 M = 0.089 M

We can calculate the time elapsed (t) using the following expression.

ln ([H₃PO₄]/[H₃PO₄]₀) = - k × t

ln (0.089 M/1.27 M) = - 0.086 s⁻¹ × t

t = 31 s

It takes 31 s for 1.27 M H₃PO₄ to decrease its concentration to 7.0% of its initial value following first-order kinetics.

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Answer:

a chemical compound

The value of delta H° for aniline = 6415 Kj/mol

calculation

Step 1: find heat

Q (heat)  =  C (specific heat capacity)  x ΔT (change in temperature)

C= 4.25 kj/c°

ΔT = 69.8-29.5  = 40.3 c°

Q= 4.25 kj/c  x  40.3 c = 171.28 kj

Step 2:  find the moles of aniline

moles  = mass/molar  mass

= 2.49 g/ 93.13 g/mol =0.0267 moles

Step 3:  find delta H

171.28 kj/0.0267 mol = 6415 kj/mol

since the reaction is  exothermic  delta H = 6415 Kj/mol

Answer:

-6.41x10^3

Explanation:

2.49 is 3 significant figures, so your answer should reflect that. Since heat is lost to the surroundings, the reaction is exothermic, and the answer should be negative.

Answer:

The elements which are in the group