What type of molecule is acetylacetone?

Answer:

The starting substances of a chemical reaction are called the reactants, and the new substances that result are called the products.

Answer:

0.068 moles of sodium hydroxide would have to be added to 150 mL of a 0.483 M acetic acid solution

Explanation:

As we know  

pH = pKa + log [salt]/[acid]

4.480= 4.74 + log [salt]/[acid]

log [salt]/[]acid] = -0.06

[salt]/[acid] = 0.87

moles acid = 0.150 L x 0.483 mol/L = 0.07245 moles acid

x/0.07245-x = 0.87

X- 0.07245 X = 0.87 *0.07245

X = 0.068 moles

Answer:

92.6

Explanation:

Answer:

55.9 g KCl.

Explanation:

Hello there!

In this case, according to the definition of molality for the 0.500-molar solution, we need to divide the moles of solute (potassium chloride) over the kilograms of solvent as shown below:

[tex]m=\frac{mol}{kilograms}[/tex]

Thus, solving for the moles of solute, we obtain:

[tex]mol=m*kilograms[/tex]

Since the density of water is 1 kg/L, we obtain the following moles:

[tex]mol=0.500mol/kg*1.50kg\\\\mol=0.75mol[/tex]

Next, since the molar mass of KCl is 74.5513 g/mol, the mass would be:

[tex]0.75mol*\frac{74.5513g}{1mol}\\\\55.9g \ KCl[/tex]

Regards!

Answer:

38 and [Kr] 5s2.

Explanation:

The number of electrons and the electronic configurations are the same for the three isotopes of Strontium because in isotopes number of neutron increases not number of proton or electron. Isotope of element having the same atomic number but with different atomic masses due to increase the number of neutrons in each isotope. So the number of electron in all isotopes are the same i.e. 38 and the electronic configuration is also the same i.e. [Kr] 5s2.

Answer:

It holds heat from the sun close to Earth.

Explanation:

Hope this helps and have a great day. :)

Answer:

Please find the complete question and its solution in the attached file:

Explanation:

Answer:

Explanation:

It's 8

Answer: b because Potential energy is converted to kinetic energy as a stationary object begins to move.

Explanation:

Answer:where is the image

Explanation:

Answer:

B.

a selectively permeable membrane

Explanation:

The question is incomplete, the complete question is;

Solid mercury (II) oxide decomposes into liquid mercury and oxygen gas upon the absorption of 90.8 kJ for each mole of mercury (II) oxide decomposed.

What is the reaction without the energy?

What is the appropriate side of the equation and value for the energy term?

Answer:

See Explanation

Explanation:

The equation of the reaction is;

2HgO(s) ==> 2Hg(l) + O2(g)

Let us recall that a chemical equation is balanced if the number of atoms of each element on both sides of the reaction equation are the same. There are two atoms each of mercury and oxygen on both sides of the reaction equation hence the equation is balanced.

In order to write a thermochemical equation, the heat of reaction is written on the right hand side of the reaction equation after writing the products as follows;

2HgO(s) ==> 2Hg(l) + O2(g)    ΔH = +90.8 kJ

Answer:

10.22g

Explanation:

Using the formula as follows:

Q = m × c × ∆T

Where;

Q = amount of heat required (J)

m = mass of substance (g)

c = specific heat of substance (J/g°C)

∆T = change in temperature (°C)

According to the information given in this question;

Q = 341J

m = ?

∆T = 55.0ºC - 18.0ºC = 37°C

c of aluminum = 0.902J/g°C

Using Q = m × c × ∆T

341 = m × 0.902 × 37

341 = 33.374m

m = 341 ÷ 33.374

m = 10.22g

Answer: Solubility of NaOH is greater and there are more OH- ions in solution.

Explanation: Reactions : NaOH (s) ⇒ Na+ (aq) + OH- (aq)

Mg(OH)2 (s) ⇒ Mg2+ (aq) + 2 OH-(aq)

Although in same amount of moles, Mg(OH)2 produces

two (OH-)-ions in water solution, solubility of Mq(OH)2 is smaller.

Concentration [OH-]ions is smaller in saturated  water solution

of Mg(OH)2

Answer:

At about 51 °C

Explanation:

Hello there!

In this case, according to the attached solubility chart of potassium nitrate, our first step for this problem is to calculate the grams of this solute in 100 g given that 23 g are soluble in 25 g of water:

[tex]\frac{23g}{25g}=\frac{x}{100g}\\\\x= \frac{23g*100g}{25g}=92g[/tex]

Thus, such solubility of 92 g in 100 g of water is exhibited at about 51 °C.

Regards!

Answer:

d

Explanation:

d

The formulas which could represent the empirical formula and the molecular formula of a given compound are  CH₂, C₃H₆ as the smallest possible is 2 which on multiplying the subscripts of empirical formula give molecular formula.

Empirical formula of a compound is defined as the simplest whole number ratio of atoms which are present in a compound.It does not make any mention of the arrangement of atoms or the number of atoms. The empirical formula gives information about the ratio of number of atoms which are present in a compound.

Molecular formula is determined from the empirical formula by dividing the molar mass of a compound by the empirical formula mass. The resultant which should be a whole number or very close to the whole number , then the subscripts are multiplied by the whole number to get the molecular formula.

Learn more about empirical formula,here:

https://brainly.com/question/14044066

#SPJ6

Answer:

Cells need to divide to reproduce.

Explanation:

They go through numerous stages, such as mitosis to further replicate themselves. They can't get things done alone, so they have to work in numbers.

Answer:

[tex]m_{FeCl_2}=0.652gFeCl_2[/tex]

Explanation:

Hello there!

In this case, according to the given information and the chemical reaction, whereby iron and hydrochloric acid react in a 1:2 mole ratio, it is firstly necessary to calculate the moles of iron (II) chloride from each reactant in order to figure out the limiting reactant:

[tex]n_{FeCl_2}=2.45gFe*\frac{1molFe}{55.845gFe}*\frac{1molFeCl_2}{1molFe}=0.0439molFeCl_2\\\\ n_{FeCl_2}=1.5L*0.25\frac{molHCl}{L} *\frac{1molHCl}{36.46gHCl}*\frac{1molFeCl_2}{2molHCl}=0.00514molFeCl_2[/tex]

In such a way, we infer the maximum moles of FeCl2 product are yielded by HCl, for which it is the limiting reactant. Finally, we calculate the grams of product by using its molar mass as shown below:

[tex]m_{FeCl_2}=0.00514molFeCl_2*\frac{126.75gFeCl_2}{1molFeCl_2} \\\\m_{FeCl_2}=0.652gFeCl_2[/tex]

Regards!

Answer:

Lower the pH slightly

Explanation:

The mixture of HF, hydrofluoric acid and KF, potassium fluoride produce a buffer that is defined for the equilibrium:

HF(aq) → H⁺(aq) + F⁻(aq)

The buffer can maintain the pH of a solution despite the addition of strong bases or acids.

The reaction of HF with Ca(OH)2 is:

2HF + Ca(OH)2 → 2H2O + CaF2

That means the calcium hydroxide is decreasing the concentration of HF. Based on the equilibrium, the H+ and F- ions will decrease in order to produce more HF. As H+ is decreasing due the equilibrium and not for the addition of a strong base, the pH is decreasing slightly.

Answer:

Root system will become larger or extend farther

Explanation:

If nutrient in soil decrease, the plant's roots system will likely become larger and extend out deeper and farther to get all the nutrients it possibly can

Answer:

not a mineral but is a “mineraloid

Explanation:

not mineral

Explanation: its an element but it is not a mineral

Answer: H3PO4(aq)+3NaOH(aq)→Na3PO4(aq)+3H2O(l)

Explanation:

Answer:

143.12 g

Explanation:

From the question given above, the following data were obtained:

Initial temperature (T₁) = 32 °C

Final temperature (T₂) = 130 °C

Heat (Q) = 5400 J

Specific heat capacity (C) = 0.385 J/gºC

Mass (M) =?

Next, we shall determine the change in temperature of copper. This can be obtained as follow:

Initial temperature (T₁) = 32 °C

Final temperature (T₂) = 130 °C

Change in temperature (ΔT) =?

ΔT = T₂ – T₁

ΔT = 130 – 32

ΔT = 98 °C

Finally, we shall determine the mass of copper. This can be obtained as follow:

Change in temperature (ΔT) = 98 °C

Heat (Q) = 5400 J

Specific heat capacity (C) = 0.385 J/gºC

Mass (M) =?

Q = MCΔT

5400 = M × 0.385 × 98

5400 = M × 37.73

Divide both side by 37.73

M = 5400 / 37.73

M = 143.12 g

Therefore, the mass of copper is 143.12 g

Answer:

B

Explanation:

Chemical bonds are a form of potential energy.

gravitational force is most responsible for binding together an atom’s protons and neutrons.

In physics, gravity (from Latin gravitas 'weight') is a fundamental interaction which causes mutual attraction between all things with mass or energy. Gravity is by far the weakest of the four fundamental interactions, approximately 1038 times weaker than the strong interaction, 1036 times weaker than the electromagnetic force and 1029 times weaker than the weak interaction. As a result, it has no significant influence at the level of subatomic particles. However, gravity is the most significant interaction between objects at the macroscopic scale, and it determines the motion of planets, stars, galaxies, and even light.

On Earth, gravity gives weight to physical objects, and the Moon's gravity causes tides in the oceans. Gravity also has many important biological functions, helping to guide the growth of plants through the process of gravitropism and influencing the circulation of fluids in multicellular organisms. Investigation into the effects of weightlessness has shown that gravity may play a role in immune system function and cell differentiation within the human body.

The gravitational attraction between the original gaseous matter in the Universe allowed it to coalesce and form stars which eventually condensed into galaxies, so gravity is responsible for many of the large-scale structures in the Universe. Gravity has an infinite range, although its effects become weaker as objects get farther away.

Learn more about gravitational force

https://brainly.com/question/9571572

#SPJ2

Answer:

D. contains the maximum amount of solute that will dissolve in that solvent at that temperature.

Explanation:

Solubility is a term used to describe how readily a substance can be dissolved in a solvent to form a solution. Thus, a substance is said to be soluble if it dissolves completely in a solvent and insoluble if it doesn't dissolve or only dissolves partially.

For example, sodium chloride (NaCl) when mixed with water dissociates into sodium and chloride ions. Thus, salt (sodium chloride) is said to be soluble because it dissolves completely in water.

Hence, a compound that dissolves in water to produce an aqueous solution is said to be soluble in water. Also, the solute of an aqueous solution that conducts electricity is called an electrolyte.

In Chemistry, dissolution can be defined as the process of dissolving or dissociating a solute in solid, liquid or gaseous phase into fragmented particles by a solvent in order to form a solution. For dissolution to occur in solids, the crystalline structure of the substance must be broken up so as to release ions, atoms or molecules to produce a solution. For liquid and gases, the substance to be dissolved must form a non-covalent bond with the solvent to produce a solution.

Generally, a saturated solution contains the maximum amount of solute that will dissolve in that solvent at that temperature.

In order to balance the chemical equation, the coefficient of Na should be 2.

Answer:

Explanation:

fdcdf