using the soubility curve what is the solubilityof nh4cl in 10 mL of water at a temperature of 60 degrees Celsius​

Answer:

Modern scientists base their classifications mainly on molecular similarities. They group together organisms that have similar proteins and DNA. Molecular similarities show that organisms are related. In other words, they are descendants of a common ancestor in the past.

Explanation:

Answer:

b

Explanation:

hi from 2022

Ben and Sam were conducting experiments on physical and chemical changes in science class. Sam is correct. It is a chemical change and the contents should be in D. for compound. Therefore, option B is correct.

In a physical change the visual aspect or form of the matter changes but the kind of matter in the substance does not. However, in a chemical change, the kind of matter changes and at least one new matter with new properties is produced.

Some of the processes that makes physical changes include cutting, bending, dissolving, freezing, boiling, and melting.

Examples of chemical changes are baking soda and vinegar creating carbon dioxide, iron rusting, and wood burning.

Thus, Sam is correct. It is a chemical change and the contents should be in D. for compound, option B is correct.

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Answer:

The final temperature of the water mixture is 47.85°C

Explanation :

Given,

For Warm Water

mass = 10grams

Temperature = 105°C

For Cold Water

mass = 25grams

Temperature = 25°C

When a sample of warm water is mixed with a sample of cool water,

The energy amount going out of the warm water is equal to the energy amount going into the cool water. This means:

However,

Q = (mass) (ΔT) (Cp)

Cp = Specific heat of water = 4.184 J/Kg°C

So,

(mass) (ΔT) (Cp) = (mass) (ΔT) (Cp)

We start by calling the final, ending temperature 'x.' Keep in mind that BOTH water samples will wind up at the temperature we are calling 'x.' Also, make sure you understand that the 'x' we are using is FINAL temperature. This is what we are solving for.  

The warmer water goes down from to 105°C to x, so this means its Δt equals 105°C − x. The colder water goes up in temperature, so its Δt equals x − 25℃

Substituting the values,

(10)( 105°C − x)(4.184) = (25)(x − 25℃)(4.184)

Solving for x, we get

x = 47.85°C

Therefore, The final temperature of the water mixture is 47.85°C.

Answer:

electrons

Explanation:

metals do what is called metallic bond

An electron is the particles are free to drift in metals.

The elements having tendency to lose electron and having properties like lustrous, malleable, ductile, opaque, denser and good conductor of heat and electricity is called metals

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Answer: Check explanation

Explanation:

Then bike can't get hit.  They can turn the wheel. They can hit the brake

Answer:

B

Explanation:

Answer:

B

Explanation:

Answer:

3. I don’t have a chart, but this is the

most salt per volume. It is all I have.

Explanation:

Answer:

Explanation:

After fossils are buried, how do they get to the surface to be discovered? That's right, the only way for those sediments to reach the surface is for them to be pushed up during the process of mountain making and then worn away by the forces of erosion.

Fossils form in sedimentary layers or rock layers from specific periods when favorable conditions permit preservation of bones, teeth, and sometimes impressions of the organism. Geological activities, such as erosion and plate tectonics, along with climate change, can eventually bring these fossils back to the surface.

Fossils, which provide solid evidence of organisms from the past, are typically found in sedimentary layers located next to bodies of water or in rock layers dating back to periods such as the Permian period. Upon death, an organism's body decomposes, leaving mostly teeth and bones, which under specific conditions can become fossilized through processes involving materials like volcanic ash, limestone, and mineralized groundwater.

Geological activity, such as erosion, weathering surface layers, and plate tectonics can eventually bring these fossils back to the surface. Climate change can also expose fossils, as seen when perennial snow covering Greenland melted to reveal geologic evidence of ancient life. These methods allow us to discover fossils of organisms ranging from bivalves and trilobites to early vertebrate bones.

The study and categorization of these fossils from all over the world allows scientists to determine when these organisms lived relative to each other, creating a fossil record that narrates the story of life's evolution on our planet.

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Final answer:

An acid is a compound that releases hydrogen ions in water. Strong acids fully ionize, releasing all their hydrogen ions, whereas weak acids only partially ionize. Examples are hydrochloric acid (strong) and acetic acid (weak).

Explanation:

Definitions of Acids, Strong Acids, and Weak Acids:

Acids can be described as molecular compounds that release hydrogen ions (H+) when dissolved in water, which are responsible for the characteristic properties of acids in aqueous solutions. These properties include the ability of the solution to conduct electricity, due to the presence of ions.

Strong acids are those that completely ionize in solution, releasing all of their hydrogen ions into the water. An example of a strong acid is hydrochloric acid (HCl), which dissociates into hydrogen and chloride ions as follows:

HCl → H+ + Cl¯

On the other hand, weak acids only partially ionize in water, which means not all of their hydrogen ions are released into the solution. Acetic acid, found in vinegar, is a common example of a weak acid. Its ionization is represented by the following chemical equation:

CH3COOH → CH3COO¯ + H+

The strength of an acid can be quantitatively represented by its acid ionization constant (Ka), which is higher for strong acids and lower for weak acids.

Answer:

1. The colors changes mean the reaction took place.

2. Fe and CuSO4

3. FeSO4 and Cu

4. This means that the electrons on both the reactants and the products have to be balance or need to be the same.

5. When you get the products meaning after the reaction takes place

The color change from blue to colorless indicates copper ions are being reduced to metallic copper in a chemical reaction, where iron and copper(II) sulfate are reactants, and iron(II) sulfate and copper are products. A balanced chemical equation has equal numbers of each type of atom on both sides, and reaction rate can be measured by changes in reactant/product concentration over time.

The color changes indicate a chemical reaction is taking place. Specifically, the disappearance of the blue color suggests the reduction of copper ions (Cu2+) to metallic copper (Cu) and their removal from the solution.

The reactants in this reaction are iron (Fe) and copper(II) sulfate (CuSO4).

The products are iron(II) sulfate (FeSO4) and copper (Cu).

A balanced chemical equation means that the number of atoms for each element is the same on both sides of the equation. This follows the law of conservation of mass, which states that matter cannot be created or destroyed in a chemical reaction.

To determine the rate of a chemical reaction, one approach is to measure the change in concentration of a reactant or product over time. For example, for the reaction Fe(s) + CuSO4(aq) → FeSO4(aq) + Cu(s), you might measure how quickly the blue color of CuSO4 fades or how quickly metallic copper forms on the iron nail.

Answer:

The number of electrons in the outer energy level of oxygen is 6.

Explanation:

Oxygen is present in the group 16 of the periodic table. The electronic configuration of group 16 element is [tex]ns^{2}np^{4}[/tex]. The number of electrons in outer energy level of group 16 element is always found to be 6.

The addition of the number of the electrons present in the valence shell orbitals of oxygen will give the total number of electrons present in the outer energy level.

The number of electron in the outer energy level of oxygen is (2 + 4) = 6.

1.34 moles are in 135g of Teflon.

Explanation:

Molecular formula of teflon is (C2H4)n

mass of teflon = 135 grams

atomic mass of teflon = 100.01 gram/mole

number of moles of teflon = ?

Formula used to calculate number of moles in a substance is given as:

number of moles = [tex]\frac{mass}{atomic mass of 1 mole}[/tex]

putting the values in the above equation:

number of moles = [tex]\frac{135}{100.01}[/tex]

number of moles = 1.34 moles

Teflon is polymer which is used for making non-stick coating, in 135 grams of teflon there are 1.34 moles in it.

Using the formula for calculating moles (mass/molar mass), we find that there are roughly 0.27 moles in 135g of Teflon.

To calculate the number of moles in a given mass of a substance, we use the formula:
Number of moles = Mass (in grams) / Molar Mass (in g/mol).
Teflon is also known as polytetrafluoroethylene (PTFE), and its molar mass is roughly 500 g/mol. So, to find the number of moles in 135g of Teflon, we divide:
Number of moles = 135 g / 500 g/mol = 0.27 moles.
Therefore, there are around 0.27 moles of Teflon in a 135g sample.

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The rest of the wood was burned into gases of equivalent weight.

Explanation:

The rest of the wood was burned into gases of equivalent weight.

To find the total heat absorbed by 65.0 grams of water when its temperature increases from 25°C to 40°C, use the formula: Q = mcΔT.

The total number of Joules of heat absorbed by 65.0 grams of water can be calculated using the formula:
Q = mcΔT, where m is the mass of water, c is the specific heat capacity of water, and ΔT is the temperature change.
In this case, you can use the specific heat capacity of water (4.184 J/g°C) to find the heat absorbed.

Water's chemical properties remain the same as it changes states from vapor to liquid to ice because it retains its molecular structure of two hydrogen atoms bonded to an oxygen atom (H₂O) throughout the transformations.

As water changes states from water vapor to liquid water, and then to ice, what remains consistent is (A) its chemical properties. This is because, in each state, water is still composed of Hydrogen and Oxygen atoms in a 2:1 ratio, represented as H₂O. Even though its physical properties like density, temperature, and appearance change, the fundamental molecular structure remains the same.

For instance, consider liquid water freezing into ice. Though the physical arrangement of the water molecules changes (which accounts for ice's unique property of being less dense than the liquid water), the water molecules themselves remain unchanged. Each water molecule is still composed of two hydrogen atoms bonded to an oxygen atom.

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Answer:

After 28 sec 7.5 grams of Be will be left

Explanation:

Given data:

Total amount of Be = 30 g

Half life of Be = 14 sec

Mass left after 28 sec = ?

Solution:

First of all we will calculate the number of half lives in 28 sec.

Number of half lives = T elapsed / half life

Number of half lives = 28 sec / 14 sec

Number of half lives = 2

AT time zero = 30 g

At first half life = 30 g/2 = 15 g

At second half life = 15 g/ 2 = 7.5 g

So after 28 sec 7.5 grams of Be will be left.

Answer:

moles, liter, concentration, and 6.0 mol/L

Explanation:

Answer:

First Question:

Moles, liter, concentration, 6.0 mol/L

Second Question:

C. [HCl]

Third Question:

C. molarity.

Fourth Question:

A. M = mol solute/liter solution

Explanation:

Got it right

0.16 moles of Aluminum hydroxide are needed to react with 25 grams of sulfuric acid.

Explanation:

In order to find the number of moles we first need to write down the balanced equation as,

[tex]3 H_{2} S O_{4}+2 A l(O H)_{3} \stackrel{\text { yiek }}{\longrightarrow} \mathrm{Al}_{2}\left(\mathrm{SO}_{4}\right)_{3}+6 \mathrm{H}_{2} \mathrm{O}[/tex]

Now as mentioned above,For 3 moles of sulfuric acid , we need 2 moles of Aluminum hydroxide to balance the equation,

Thus we can balance it as,

[tex]\begin{aligned}25 \mathrm{g} \text { of } \mathrm{H}_{2} \mathrm{SO}_{4} & \times \frac{1 \mathrm{mol} \text { of } \mathrm{H}_{2} \mathrm{SO}_{4}}{98.079 \frac{\mathrm{g}}{\mathrm{mol}}} \times \frac{2 \mathrm{mol} \mathrm{Al}(\mathrm{OH})_{3}}{3 \mathrm{mol} \mathrm{H}_{2} \mathrm{SO}_{4}} \\\\&=0.16 \mathrm{mol} \mathrm{Al}(\mathrm{OH})_{3}\end{aligned}[/tex]

Thus it is now clearly known that 0.16 moles of Aluminum hydroxide are needed to react with 25 grams of sulfuric acid.

Explanation:

Balancing equation

Explanation:

In the given reaction, sodium is reacting with chlorine to produce sodium chloride

The chemical equation involved is

Na+Cl_2\rightarrow NaClNa+Cl2→NaCl

When the number of atoms for the reactant side is calculated it gives:

Na = 1

Cl = 2

When the number of atoms for the product side is calculated it gives:

Na = 1

Cl = 1

The obtained result indicates that the Chlorine atom is not equal on both sides. Thus the reaction is not balanced.

The balanced reaction has the number of atoms involved in reaction in reactants as well as the product is equal.

To make both side equal some changes must be made as shown in the balanced equation is

2Na+Cl_2\rightarrow 2NaCl2Na+Cl2→2NaCl

For the above equation, the number of atoms in the reactants is:

Na= 2

Cl = 2

The number of atoms in products is:

Na = 2

Cl = 2

As the number of atoms in the reactants side is equal to the number of atoms in the product side, the reaction is balanced.

Answer: Mercury (Hg)

Atomic no.= 80

Electronic Configuration= 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2 4f^14 5d^10. The shortened form of the electronic configuration is: [Xe] 4f14 5d10 6s2.

I hope that this helps you !

Answer:

more than 300 N

Explanation:

you have to have more than 300 N of force to move an object that already requires 300 so 301 N would push it but very slowly

Answer:

Because it is closer to earth than the other blue giant stars.

Explanation:

The sun is closer to earth than any other big star which means we see it bigger.

Hey there!

A mole is measured in atoms, molecules, particles. It's kind of a loose sort of measurement, just unit of the substance.

Since there is a ratio of 1 to 1 nitrogen to oxygen, there will be the same amount of molecules as atoms of nitrogen.

2.25 moles of NO gas are formed from 2.25 moles of nitrogen.

Hope this helps!

Answer:

Explanation:

Combustion of methane gas molecules in abundance of O2 can follow the above reaction, product expected carbon dioxide, water and energy only.

 But, when the O2 is not sufficiently available for perfect methane combustion, then there are many other products from the methane combustion reaction in above the product with CO and C.  

 The molar ratio of [C]: [CO] :[CO2] will depend on the availability of O2 for combustion of methane . In the high deficiency of oxygen conditions:  monoxide and black carbon will be the major products of the combustion of methane.

Answer:

C₂ = 0.02 M

Explanation:

Given data:

Initial volume of solution = 0.1 L

Initial molarity = 0.1 M

Final volume = 0.5 L

Final concentration = ?

Solution:

Formula:

C₁V₁ = C₂V₂

C₁ = Initial volume of solution

V₁ = Initial molarity / concentration

C₂ = Final concentration

V₂ = Final volume

Now we will put the values in formula.

C₁V₁ = C₂V₂

0.1 M × 0.1 L =  C₂ × 0.5 L

0.01 M.L = C₂ × 0.5 L

C₂ = 0.01 M.L /  0.5 L

C₂ = 0.02 M

Final answer:

Using the dilution formula M1V1 = M2V2, we determined that the final concentration of the solution that was initially 0.1 M and dilutes from 0.1 L to 0.5 L is 0.02 M.

Explanation:

To determine the concentration of a solution that started out as 0.1 L of a 0.1 M solution and ended with a final volume of 0.5 L, we use the concept of dilution, which is expressed with the formula M1V1 = M2V2, where M1 and V1 are the concentration and volume of the initial solution, respectively, and M2 and V2 are the concentration and volume of the final solution, respectively.

In this case, we plug our known values into the formula:

M1 = 0.1 M (initial concentration)

V1 = 0.1 L (initial volume)

V2 = 0.5 L (final volume)

We want to solve for M2, the final concentration.

Substituting in:

0.1 M * 0.1 L = M2 * 0.5 L

We isolate M2 by dividing both sides of the equation by 0.5 L:

M2 = (0.1 M * 0.1 L) / 0.5 L = 0.02 M

Therefore, the final concentration of the solution is 0.02 M.

Answer:

Rain,accompanied by cooler weather

Answer:

Rain and cooler weather

Explanation:

Answer:

IT BREAKS AT RANDOM PLACES!!!!

An amorphous soild breaks at the random places

Amorphous solid, any noncrystalline solid in which the atoms and molecules are not organized in a definite lattice pattern. Such solids include glass, plastic, and gel.

These solids are stabilized by the regular pattern of their atoms. Their characteristic properties include distinct melting and boiling points, regular geometric shapes, and flat faces when cleaved or sheared.

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Answer:

Celiac disease occurs in the intestines as an allergic response to Gluten in certain cereal grains.

Explanation:

Answer:

Celiac disease is genetic and if one person of the family has it you might have it too. Also if one of the parents have a certain gene and is passed on to the child the risk of celiac disease is high.

Explanation:

Hope it Helps