I’m stuckkkkkk please help

Answer:

I mean, anything can turn into smoke?

Answer:

B and C

Explanation:

Most animals that live underwater have have gills and tails and vise versa hope this helps!

koukladina stop deleting my answers I'm trying to help people I'm not doing anything wrong stop it

Answer:

i should be A i hope this helps

Explanation:

Answer:

You can convert between the various different sizes by merely moving the decimal point the correct number of places. The basic metric units are meters (for length), grams (for mass or weight), and liters (for volume).

Explanation:

The parts of dog skeleton is pelvis, femur, fibula, fibril, tarsus, metatarsus and phalange.

Skeleton is defined as the structure of vertebrate creatures that supports their soft tissues and shields many of their internal organs. Ligaments keep it together, and muscles that are connected to it move it at the joints.

The axial skeleton and the appendicular skeleton are the two sections of the canine skeleton. The vertebral column and the rib cage make up the axial skeleton. The pectoral girdle/limb and the pelvic girdle/limb make up the appendicular skeleton.

Thus, the parts of dog skeleton is pelvis, femur, fibula, fibril, tarsus, metatarsus and phalange.

To learn more about skeleton, refer to the link below:

https://brainly.com/question/14446520

#SPJ1

Answer:

I believe it is the last option: atoms

Answer:

The answer is C) fluorine (F)

Answer:

The correct answer is - Pine tree.

Explanation:

Coniferous trees or cone-bearing trees normally called conifers adapted their leaves and have needles like leaves that retain more water. Needles do not appear to be leaves but are modified leaves.

Conifer trees adapt this leaf modification to prevent water loss due to transpiration in the case of dry air or atmosphere. Important members of the conifer trees are pine trees, cedars, spruces, and Pines.

The color change of the equilibrium system of cobalt complexes can provide valuable information about changes made to the system at equilibrium. In this case, the Co(H₂0)₆²⁺ (aq) complex is pink and the CoCl₂⁻ (aq) complex is light blue.

If the solution changes from pink to light blue, it means that the concentration of CoCl₂⁻ (aq) complex has increased and the concentration of Co(H₂0)₆²⁺ (aq) complex has decreased. This could be due to the addition of more chloride ions or the removal of water molecules from the system. As a result, the equilibrium shifts towards the side of the equation with fewer chloride ions and more water molecules.

On the other hand, if the solution changes from light blue to pink, it means that the concentration of Co(H₂0)₆²⁺ (aq) complex has increased and the concentration of CoCl₂⁻ (aq) complex has decreased. This could be due to the addition of more water molecules or the removal of chloride ions from the system. As a result, the equilibrium shifts towards the side of the equation with fewer water molecules and more chloride ions.

If the solution stays light blue after adding a chemical, it means that the added chemical has no effect on the equilibrium system. This could be because the added chemical does not react with any of the species in the equilibrium system or because its effect is negligible compared to the existing concentrations of the species.

To know more about equilibrium, refer to the link below:

https://brainly.com/question/15398944#

#SPJ11

Answer: Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula—a spinning, swirling disk of material

Explanation:

Answer:

Explanation:

Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula—a spinning, swirling disk of material. this is because if some get to close it could burn the planet i think.

The pH of the original solution was approximately 5.875.

The Henderson-Hasselbalch equation is given by:

pH = pKa + log([A-]/[HA])

First calculate the concentration of the weak acid after the addition of HCl:

Initial concentration of weak acid = 0.1 M

Volume of weak acid = 100 mL = 0.1 L

Moles of weak acid = concentration * volume = 0.1 M * 0.1 L = 0.01 moles

Concentration of HCl = 1 M

Volume of HCl = 6 mL = 0.006 L

Moles of HCl = concentration * volume = 1 M * 0.006 L = 0.006 moles

After the addition of HCl, the moles of the weak acid will be reduced by the moles of HCl:

Final moles of weak acid = initial moles of weak acid - moles of HCl = 0.01 moles - 0.006 moles = 0.004 moles

Volume of the final solution = initial volume of weak acid + volume of HCl = 100 mL + 6 mL = 106 mL = 0.106 L

The concentration of the weak acid in the final solution = final moles of weak acid/volume of final solution = 0.004 moles / 0.106 L = 0.0377 M

Now using the Henderson-Hasselbalch equation to calculate the pH of the original solution:

pH = pKa + log([A-]/[HA])

pH = 6.3 + log(0.0377/0.1)

pH = 6.3 + log(0.377)

pH = 6.3 + (-0.425)

pH ≈ 5.875

So, the pH of the original solution was approximately 5.875.

If a strong base was added instead of strong acid, the pH of the solution would increase. The strong base would react with the weak acid, forming the conjugate base of the weak acid and water. This would shift the equilibrium towards the conjugate base, resulting in an increase in pH.

To calculate the concentration of protons in the original weak acid buffer solution, you can use the equation:

[H+] = 10^(-pH)

[H+] = 10^(-5.875)

[H+] ≈ 1.3 x 10^(-6) M

To calculate the concentration of hydroxide ions in the original weak acid buffer solution, you use the equation:

[OH-] = Kw / [H+]

Kw is the ion product of water, which is equal to 1 x 10^(-14) at 298 K.

So,

[OH-] = (1 x 10^(-14)) / (1.3 x 10^(-6))

[OH-] ≈ 7.7 x 10^(-9) M

Learn more about pH solutions at: https://brainly.com/question/26424076

#SPJ4

Valences have the greatest tendency to form ions, are, +1,-1,+2,-2,+3,-3. All the options are correct.

Valence is the number of electrons lost or gained in a reaction to complete an element's outer energy level.

When an atom gains or loses a valence electron, it forms an ion. Atoms form ions in order to help another to obtain a full octet and to stabilize the valence.

Some atoms gain or lose electrons to form ions because they need to become more stable. They sometimes give them to have an outer shell or gain them to get a closer charge to eight.

To know more about the Valence electrons, here

brainly.com/question/866518

#SPJ4

Answer:

+1,-1,+2,-2,+3,-3

Explanation:

A. The chapter would need to provide information on the volume differences between O2 gas and other gases at various pressures.

D. The chapter should provide a calculation or conversion formula to determine the volume of O2 gas in milliliters (ml) corresponding to a given pressure of 742.3 mm Hg.

To answer question A, the chapter should contain data or explanations regarding the variations in volume between O2 gas and other gases under different pressure conditions. It might include information on Boyle's Law or the relationship between volume and pressure for gases.

For question D, the chapter needs to provide a method or equation to calculate the volume of O2 gas in milliliters corresponding to a given pressure of 742.3 mm Hg.

This could involve using the ideal gas law equation or employing the appropriate gas constant and temperature values. The chapter should include the necessary steps or formula to determine the volume accurately.

For more questions like Volume click the link below:

https://brainly.com/question/1578538

#SPJ11

Answer: Metals

Explanation:

When an atom accepts an electron negative charge is created on atom and is called as anion.

When atom loses an electron positive charge is created on atom and is called as cation.

The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

Thus metals form cations.

0 J

Work = Force * Displacement

Since displacement is 0 m (object isn't moving), work would also be 0.

The enantiomeric excess (e.e.) of the mixture containing 5.70 g of (-)-glyceraldehyde and 2.0 g of (+)-glyceraldehyde is 48%.

To calculate the enantiomeric excess (e.e.) of a mixture, we need to determine the difference in the amounts of the two enantiomers and express it as a percentage of the total amount.

Given;

Mass of (-)-glyceraldehyde = 5.70 g

Mass of (+)-glyceraldehyde = 2.0 g

Calculate the total amount of glyceraldehyde in the mixture.

Total mass of glyceraldehyde = Mass of (-)-glyceraldehyde + Mass of (+)-glyceraldehyde

= 5.70 g + 2.0 g

= 7.70 g

Calculate the individual amounts of each enantiomer as a fraction of the total amount.

Fraction of (-)-glyceraldehyde = Mass of (-)-glyceraldehyde / Total mass of glyceraldehyde

= 5.70 g / 7.70 g

= 0.740

Fraction of (+)-glyceraldehyde = Mass of (+)-glyceraldehyde / Total mass of glyceraldehyde

= 2.0 g / 7.70 g

= 0.260

Calculate the enantiomeric excess (e.e.).

e.e. = (Fraction of (-)-glyceraldehyde - Fraction of (+)-glyceraldehyde) × 100%

= (0.740 - 0.260) × 100%

= 0.480 × 100%

= 48%

Therefore, the enantiomeric excess (e.e.) of the mixture containing 5.70 g of (-)-glyceraldehyde and 2.0 g of (+)-glyceraldehyde is 48%.

To know more about enantiomeric excess here

https://brainly.com/question/32199328

#SPJ4

Adding an additional oxygen atom to O₂ creates ozone (O₃). Option A is correct.

Ozone is the molecule which is composed of three oxygen atoms bonded together. When an O₂ molecule gains an additional oxygen atom, it forms an ozone molecule. This process occurs primarily in the upper atmosphere, specifically in the ozone layer, which is located in the stratosphere.

The formation of ozone is important for the Earth's atmosphere as it serves as a protective layer against harmful ultraviolet (UV) radiation from the sun. Ozone absorbs a significant amount of UV radiation, preventing it from reaching the Earth's surface.

However, the addition of an oxygen atom to O₂ does not create CFCs (chlorofluorocarbons), oxygen, or methane. CFCs are synthetic compounds that consist of carbon, chlorine, and fluorine atoms, and they have been identified as significant contributors to ozone depletion. Oxygen is already present in O₂, and methane is a separate compound composed of carbon and hydrogen atoms.

Hence, A. is the correct option.

To know more about Ozone here

https://brainly.com/question/27911475

#SPJ4

--The given question is incomplete, the complete question is

"Adding an additional oxygen atom to O₂ creates _____. A)  ozone B) CFC C) oxygen D) methane."--

Answer:

binomial

Explanation:

because the fact that macromolecules is carry out with functions constant-1,2,3,4 etc

A net ionic equation for the reaction that occurs when sodium carbonate (aq) and excess hydroiodic acid are combined.

CO₃²⁻(aq) + 2H⁺(aq) -> H2O(l) + CO2(g)

The balanced equation for the reaction between sodium carbonate (Na2CO3) and excess hydroiodic acid (HI) is:

Na2CO3(aq) + 2HI(aq) → 2NaI(aq) + CO2(g) + H2O(l)

The ionic equation is:

2Na⁺(aq) + CO₃²⁻(aq) + 2H⁺(aq) + 2I⁻(aq) -> 2Na⁺(aq) + 2I⁻(aq) + H2O(l) + CO2(g)

The spectator ions are Na+ and CO32-.

Next, we can cancel out the spectator ions (Na⁺ and I⁻) to get the net ionic equation:

CO₃²⁻(aq) + 2H⁺(aq) -> H2O(l) + CO2(g)

That's the net ionic equation for the reaction between sodium carbonate and excess hydroiodic acid.

To know more about the net ionic equation, click below.

https://brainly.com/question/15466794

#SPJ11

Answer:

The theoretical yield of urea = 120.35kg

The percent yield for the reaction = 72.70%

Explanation:

Lets calculate -

The given reaction is -

\(2NH_3(aq)+CO_2\) →\(CH_4N_2O(aq)+H_2O (l)\)

Molar mass of urea \(CH_4N_2O\)= 60g/mole

Moles of \(NH_3\) = \(\frac{62.8kg/mole}{17g/mole}\) (since \(Moles=\frac{mass of substance}{mass of one mole}\))

                     = 4011.76 moles

Moles of \(CO_2\) = \(\frac{105kg}{44g/mole}\)

                = \(\frac{105000g}{44g/mole}\)

                = 2386.36 moles

Theoritically , moles of \(NH_3\) required = double the moles of \(CO_2\)

    but , \(4011.76<2\times 2386.36\) , the limiting reagent is \(NH_3\)

Theoritical moles of urea obtained = \(\frac{1 mole CH_4N_2O}{2mole NH_3}\times4011.76 mole NH_3\)

                                                      = \(2005.88mole CH_4N_2O\)

Mass of 2005.88 mole of \(CH_4N_2O\) =\(2005.88 mole \times\frac{60g CH_4N_2O}{1mole CH_4N_2O}\)

                                                     = 120352.8g

                                                     \(120352.8g\times \frac{1kg}{1000g}\)

                                                     = 120.35kg

Therefore , theroritical yeild of urea = 120.35kg

Now , Percent yeild = \(\frac{87.5kg}{120.35kg}\times100\)

                                 72.70%

Thus , the percent yeild for the reaction is 72.70%

The most frequent form of buffer overflow attack, called a stack overflow, involves a buffer overflow in the top of the stack. This kind of attack targets information on the heap, an open memory pool.

When a hacker takes advantage of the code mistake to carry out a malicious action and breach the affected system, it is called a buffer overflow attack. The hacker changes the app's execution path and overwrites some of its memory.

When more data is loaded into a fixed-length memory than the reader can hold, it overflows or overruns. which, by overflowing into neighboring memory space, corrupts or overwrites the data stored in that region, which must go someplace.

To know more about buffer overflow visit:

https://brainly.com/question/9906723

#SPJ4

Answer:

it should be chemical

Explanation:

The correct statements are:

- The cake would be considered a product.

- Flour, sugar, eggs, and baking powder would be considered reactants.

In chemistry, a reactant is a substance that is used in a chemical reaction to produce another substance, known as a product. In the process of baking a cake, the flour, sugar, eggs, and baking powder are combined and undergo chemical reactions to produce the final product, which is the cake. Therefore, the flour, sugar, eggs, and baking powder would be considered the reactants, while the cake would be considered the product.

The ingredients in a cake are flour, sugar, eggs, and baking powder. The statements best describes the chemical process of baking a cake is The cake would be considered a product, Flour, sugar, eggs, and baking powder would be considered reactants. Therefore, option A and B are correct.

Baking is the process of cooking with dry heat, typically in an oven. It is most likely the oldest cooking method. Bakery products such as bread, rolls, cookies, pies, pastries, and muffins are typically made from flour or meal derived from grain.

When you bake a cake, the ingredients undergo a chemical transformation. When the molecules of two or more substances are rearranged to form a new substance, this is referred to as a chemical change.

The ingredients in a cake are flour, sugar, eggs, and baking powder. The statements best describes the chemical process of baking a cake is The cake would be considered a product, Flour, sugar, eggs, and baking powder would be considered reactants.

Thus, option A and B are correct.

To learn more about the baking, follow the link;

https://brainly.com/question/914928

#SPJ2

A lizard basking in the morning sun is an example of behavior known as thermoregulation. Thermoregulation is a behavior that allows animals to control their body temperature by adjusting to the surrounding environment.

A lizard basking in the morning sun is an example of this behavior, as it is a common way for reptiles to regulate their temperature. By absorbing heat from the sun, the lizard can increase its body temperature to an optimal level that is necessary for its metabolic processes to function properly. This helps the lizard maintain its energy levels and overall health, and is crucial for survival in a changing and unpredictable environment. Thermoregulation is an important adaptation that has evolved in many species to help them cope with variations in temperature, and is essential for their survival.

Learn more about Thermoregulation here: brainly.com/question/15276860

#SPJ4

The statement that describes a phase change that could occur for water is "At -1.0°C, water transitions from a solid to a liquid as the pressure increases from 0.05 atm to 500 atm."

This is because at -1.0°C, water is in a solid state, but as pressure increases, the molecules gain energy and start to move more freely, causing the phase change from solid to liquid. However, it is important to note that water does not transition from a solid directly to a gas, as stated in the first option, without passing through the liquid phase. Additionally, water does not transition from a gas to a solid, as stated in the fourth option, without passing through the liquid phase first. Understanding phase changes in water is important in many scientific fields, such as in weather and climate studies and in the study of materials science.

To learn more about phase change click here https://brainly.com/question/30270780

#SPJ11

The statement that describes a phase change that could occur for water is: At -1.0°C, water transitions from a solid to a liquid as the pressure increases from 0.05 atm to 500 atm.

A phase change refers to a transition from one state of matter to another. Water is known to exist in three phases, namely solid, liquid, and gas. These phase changes are influenced by temperature and pressure.
The statement above describes the process of sublimation, where solid water (ice) is converted to gas (water vapor) without passing through the liquid phase. However, this is not a feasible phase change scenario since it violates the laws of thermodynamics.
At a pressure of 200 atm and a temperature of -1.0°C, water should exist in the liquid phase. At this pressure, water is prevented from vaporizing at a lower temperature. Conversely, at a pressure of 500 atm and -1.0°C, the ice will melt and transition to liquid water. Increasing the pressure makes it more difficult for water to remain in its solid phase, hence the phase change. This shows how pressure and temperature can influence the phase of water.

Learn more about phase change here:

https://brainly.com/question/30270780

#SPJ11

To determine the number of moles of NH3 needed to produce 27 moles of H2O, we need to use the coefficients in the balanced chemical equation for the reaction:

4NH3 + 6NO → 5N2 + 6H2O

Since the coefficients represent the stoichiometric ratios between the reactants and products, we can use them to determine how many moles of NH3 are needed for a certain amount of H2O produced.

For every 6 moles of H2O produced, 4 moles of NH3 are consumed. Therefore, to produce 27 moles of H2O, we need 4 * (27 moles H2O / 6 moles H2O/mol NH3) = 27 moles H2O / (6 moles H2O / 4 moles NH3) = 27 * (4 moles NH3 / 6 moles H2O) = 18 moles of NH3.

So, 18 moles of NH3 are needed to produce 27 moles of H2O.

The value for k if the equilibrium pressures for hydrogen, oxygen, and water are 1, 0.5, and 1 atm, respectively are mentioned below.

What is equilibrium ?

A condition of balance can be either static (as in the case of a body acting on by forces whose resultant is zero) or dynamic (as in the case of a reversible chemical reaction when the velocities in both directions are equal). This equilibrium can be either intellectual or emotional.

What is pressure?

The pressure is nothing but the vital force applied to the object or particle. Pressure calculates how much force will be gone or extended to the object. Pressure is the force that is perpendicular to the power of extension. The standard unit of pressure is the pascal (pa).The formula for pressure, p= F/ Ap= pressure, F= magnitude, A= area of the surface pressure is the scalar quantity. Pressure is also expressed in the term atmospheric pressure, atm.

2H₂(g)+ O₂(g)⇒ 2H₂O(g)

As we know, formula for K is as follows:

Kp= (PH₂O)²/ (PH₂)²*PO₂

Here, we have

pH2O = 1 atm

pH2 = 1 atm

pO2 = 0.5 atm

Putting these values in the equation, we get

Kp = 2atm⁻¹

Now, we can convert it into Kc as follows:

Kp = Kc(RT)Δn

Where, change in moles of gases, ∆n = 2-3 = -1

Temperature, T = 25°C = 298 K

R = 0.082 atm•L/mol-K

So,

Kp = Kc(RT)Δn

2= Kc (0.082* 298)⁻¹

2= Kc*0.041

Kc= 0.041/2

Kc= 48.87

Therefore, the value for k if the equilibrium pressures for hydrogen, oxygen, and water are 1, 0.5, and 1 atm, respectively are mentioned above.

Learn more about equilibrium from the given link.

https://brainly.com/question/517289

#SPJ4