What things contribute to the amount of greenhouse gasses on Earth?

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.

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

Explanation:

Answer:

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

Answer:

Explanation:

It's 8

The population likely to increase as a result is otter.

Option B is correct.

Population is described as  the term typically used to refer to the number of people in a single area.

When the yellow perch population decreases, there is a decrease in predation pressure on the otter  population which means that there are fewer yellow perch preying on the otters, which could lead to an increase in the otter population.

An organism population is described by characteristics that include: population size and the population density.

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Answer:

92.6

Explanation:

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:where is the image

Explanation:

Answer:

B.

a selectively permeable membrane

Explanation:

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:

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:

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:

It holds heat from the sun close to Earth.

Explanation:

Hope this helps and have a great day. :)

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:

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

Explanation:

Answer:

Explanation:

fdcdf

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

The crust + upper mantle is called the lithosphere.

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

Explanation:

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:

B

Explanation:

Chemical bonds are a form of potential energy.

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.

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

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:

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:

The answer is in the explanation

Explanation:

The atomic weight of an element is defined as the mass of 1 mole of atoms of the element. To find the atomic weight of the first 30 elements we must see our periodic table:

#      Element       Atomic Weight

1       Hydrogen 1.008

2 Helium 4.0026

3 Lithium 6.94

4 Beryllium 9.0122

5 Boron 10.81

6 Carbon 12.011

7 Nitrogen 14.007

8 Oxygen 15.999

9 Fluorine 18.998

10 Neon 20.180

11 Sodium 22.990

12 Magnesium 24.305

13 Aluminium 26.982

14 Silicon 28.085

15 Phosphorus 30.974

16 Sulfur 32.06

17 Chlorine 35.45

18 Argon 39.948

19 Potassium 39.098

20 Calcium 40.078

21 Scandium 44.956

22 Titanium 47.867

23 Vanadium 50.942

24 Chromium 51.996

25 Manganese 54.938

26 Iron 55.845

27 Cobalt 58.933

28 Nickel 58.693

29 Copper 63.546

30 Zinc 65.38

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:

not a mineral but is a “mineraloid

Explanation:

not mineral

Explanation: its an element but it is not a mineral