Your friend is having trouble writing the electron configuration for Nickel (Ni). In your own words describe how you would teach your friend how to write an electron configuration, and then write the configuration for Ni.

Answer:

This evidence includes fossilized bones, teeth, eggs, footprints, teeth marks, and even dung. When paleontologists compare a skeleton of a living bird to the fossilized skeleton of a non-bird theropod, like Sinornithosaurus, they see many similarities.

Explanation:

Answer:

When people think of dinosaurs, two types generally come to mind. There were the huge herbivores,

like Apatosaurus, with their small heads and long tails. There were also those fearsome carnivores,

like Tyrannosaurus rex, that walked on two legs and had a mouthful of teeth like kitchen knives.

Living Dinosaurs

These large dinosaurs are no longer around, but dinosaurs still live among us today. They are the

birds. It's difficult to imagine that a bird on your window sill and a T. rex have anything in common.

One weighs less than a pound. The other was the size of a school bus, tipping the scales at eight

tons. But for all their differences, the two are more similar than you might think. In fact, birds and T.

rex are close relatives. They all belong to a group of dinosaurs called theropods.

This is a cladogram, a "" showing the relationships among organisms. The group called dinosaurs includes the extinct dinosaurs

and all their living descendants. All its members, including living birds, descended from the very first dinosaur-their common ancestor.

That's why birds are a kind of dinosaur (just as humans are a kind of primate).

Skeletal Evidence

When paleontologists compare a skeleton of a living bird to the

fossilized skeleton of a non-bird theropod, like Sinornithosaurus,

they see many similarities. They both have a hole in the hipbone, a

feature that distinguishes most dinosaurs from all other animals.

This feature allows an animal to stand erect, with its legs directly

beneath its body. All theropod dinosaurs, including birds, have a

furcula, also known as a wishbone. Another shared characteristic is the presence of hollow bones.

Hollow bones reduce the weight carried by an animal. This feature enables the animal to run faster. It

probably also played a role in the evolution of flight.

thought to have evolved for flight. The discovery of more and more non-flying dinosaurs with feathers

disproved that explanation. For these dinosaurs, feathers may have served other functions, like

gliding, insulation, protection, and display. Feathers play that same role in many bird species today.

Based on the evidence of shared characteristics, scientists have concluded that birds are a type of

Birds are the only dinosaurs with the ability to fly. This is

very interesting to scientists who want to know when the

capability of flight emerged. To find out, some scientists

study the brains of bird and non-bird dinosaurs. Soft

tissue, such as brains, is almost never preserved in the

fossil record. What is preserved is the imprint the brain

left on the inside of the skull. Now scientists are using

computed tomography (CT) scanners to create

endocasts. These are detailed, three-dimensional

reconstructions of the interiors of fossilized skulls.

In a recent study, researchers were able to peer inside

the braincases of more than two dozen specimens.

"Technology allows us to look inside these specimens

without destroying them," says Dr. Amy Balanoff, a

Museum research associate. "It's a non-destructive way

to basically slice up a dinosaur brain. We look inside and see what it can tell us about the evolution of

the brain within dinosaurs. Most of us grew up thinking that dinosaurs had tiny brains, but actually

some had really big brains."

The endocasts allow Balanoff and other researchers to

explore the outer shape of the brain in more detail. In

addition, the casts also provide new information about

the volume and shape of different regions of the brain.

For example, scientists looked at a detailed view of the

dinosaur cerebrum, a region of the brain related to

cognition and coordination. They found that this region

was very large in non-bird dinosaurs closely related to

birds. Dr. Balanoff's research suggests that these

dinosaurs developed big brains long before flight and that

these bigger brains prepared the way for them to fly.

When examining skeletal, behavioral, and brain

evidence, scientists see that birds and non-bird dinosaurs

share many features. This helped them conclude that

dinosaurs aren't extinct after all. They're living among us today.

(Im a really fast Typer and Thinker)

Have a nice day

Answer:

\(m_{H_2}=3.1gH_2\)

Explanation:

Hello,

In this case, given the reaction:

\(2H_2+O_2\rightarrow 2H_2O\)

When 23.0 g of oxygen react and 26.1 g of water are yielded, given the law of conservation of mass which states the mass of reactants must equal the mass of products:

\(m_{H_2}+m_{O_2}=m_{H_2O}\)

The mass of hydrogen turns out:

\(m_{H_2}=m_{H_2O}-m_{O_2}\\\\m_{H_2}=26.1g-23.0g\\\\m_{H_2}=3.1gH_2\)

Best regards.

According to the question,

The reaction will be:

Now,

→ \(m H_2 +mO_2 = mH_2 O\)

or,

→ \(mH_2 = mH_2O-mO_2\)

By substituting the values,

          \(= 26.1-23.0\)

          \(= 3.1 \ g\)

Thus the answer above is right.

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Answer:

false, true.

Explanation:

"That's because enzymes don't affect the free energy of the reactants or products" good luck!

At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

1: Write the balanced chemical equation:

\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)

2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.

Initial:

\(C_O\)(g) = 0.3500 mol

\(Cl_2\)(g) = 0.05500 mol

\(C_OCl_2\)(g) = 0 mol

Change:

\(C_O\)(g) = -x

\(Cl_2\)(g) = -x

\(C_OCl_2\)(g) = +x

Equilibrium:

\(C_O\)(g) = 0.3500 - x mol

\(Cl_2\)(g) = 0.05500 - x mol

\(C_OCl_2\)(g) = x mol

3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:

Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]

4: Substitute the given equilibrium constant (Kc) value into the expression:

1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)

5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:

1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x

6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.

7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.

8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):

\(Cl_2\)(g) = 0.05500 - x

9: Calculate the value of \(Cl_2\)(g) at equilibrium:

\(Cl_2\)(g) = 0.05500 - x

\(Cl_2\)(g) = 0.05500 - (positive value of x)

10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.

Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

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The data collected by Leah and Paul supports Paul's opinion that matter can exist even when it is not visible.

Support is a term used to describe a range of services and resources offered to individuals in need. It can refer to providing help with practical tasks, such as helping someone to manage their finances or providing transport to medical appointments. It can also refer to providing emotional or social support. This could involve providing counselling or having regular conversations to help someone to feel understood and supported. Support can also refer to offering advice and guidance, or providing a safe space for someone to talk and express their feelings. In its broadest sense, support is about helping someone to have the best quality of life they can.

This is because the mass of the inflated bag is greater than the mass of the empty bag despite the fact that the volume of the inflated bag is much greater. This shows that the inflated bag contains air, which is matter, even though it cannot be seen.

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Answer: i don't know what you mean by control  but if you mean what will happen is the balloon if he rubs it on his head and not his clothes electrons move from the atoms and molecules in his hair onto the balloon and since electrons have a negative charge the balloon will become negatively charged and his hair will become positively charged.

Answer: the ballon that was not rubbed with cloth

Explanation:

The word "symptom" refers to a specific manifestation or indication of a condition, disease, or disorder that is experienced or observed by an individual.

Symptoms are subjective or objective changes in the body's normal functioning that may be recognized as abnormal, uncomfortable, or problematic. Symptoms can manifest in various ways depending on the nature of the underlying condition. They can be physical, such as pain, rash, cough, fever, or fatigue, indicating an illness or injury affecting the body. Symptoms can also be psychological, such as anxiety, depression, or confusion, reflecting disturbances in mental health.

Symptoms serve as important clues for medical professionals to identify and diagnose diseases or disorders. They provide valuable information about the nature, severity, and progression of an illness, helping healthcare providers formulate appropriate treatment plans. Additionally, symptoms may also be important for individuals to self-assess their own health status and seek appropriate medical attention.

It is essential to note that symptoms alone may not provide a definitive diagnosis, as they can overlap across different conditions. Further evaluation, including medical tests and examinations, is often necessary to confirm a diagnosis and determine the appropriate course of action.

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Answer:

You can expect the balloon to expand a little

Explanation:

The molecules in the balloon will be heated up once they feel the warmth of the summer heat and start moving a lot faster

Answer:

Hello. The answer is C

Explanation:

Elements in group number 2 are:

Be _ Mg _Ca_Sr_Ba_Ra

All these elements elecrical final shell has 2 electrons so

It is easier for them to lose 2 electrons to get stable.

Answer:

C

Explanation:

Its right?

There are numerous ways to determine whether lead is present in an ore. Atomic absorption spectroscopy is a popular approach. With this method, an ore sample is dissolved in acid and then atomized in a flame or plasma.

The sample's atoms will absorb light at particular wavelengths that are peculiar to the element under investigation. The amount of light absorbed can be used to calculate how much lead is present in the sample. Inductively coupled plasma mass spectrometry and X-ray fluorescence spectroscopy are further techniques. It is crucial to remember that these procedures call for specialized tools and training, thus they ought to only be carried out in a lab by qualified experts.

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Answer:

The correct answer is HBr<NH4Br<KBr<NaCH3CO2<NaOH.

Explanation:

When salt is added to the water, the formation of acid and base takes place. The pH helps in predicting the basicity, acidity, and neutrality of a compound.

It is known that NaOH is a strong base, thus, its solution will be basic, and therefore, the pH of NaOH will be greater than 7.

The solution of HBr will be acidic as HBr is the strong acid, thus, its pH will be less than 7.

In dissolving NaCH3CO2 in water, the formation of CH3COOH, which is a weak acid, and NaOH that is, a strong base takes place. Therefore, as NaOH is the strong base, the solution will be basic, and the pH of NaCH3CO2 will be greater than 7.

On dissolving KBr in water, HBr, that is, a strong acid, and KOH, that is, a strong base is produced. Therefore, as HBr is the strong acid, and KOH is the strong base, the solution will be neutral. Thus, the pH of KBr will be equivalent to 7.

On dissolving NH4Br in water, the formation of HBr, that is, strong acid, and NH4OH, that is, the weak base takes place. Therefore, as HBr is the strong acid, the solution will be acidic, and the pH of NH4Br will be less than 7.

Hence, the increasing order of pH of 0.10 M aqueous solution will be,

HBr<NH4Br<KBr<NaCH3CO2<NaOH

The order of increasing pH of the solutions is; HBr < NH4Br < KBr < NaCH3CO2 < NaOH.

pH is a number that indicates the degree of acidity or alkalinity of a substance. The pH scale ranks from 0 - 14. 0 - 6.9 indicates acidity, 7 indicates neutrality while 8 - 14 indicates alkalinity.

The order of increasing pH of the solutions is; HBr < NH4Br < KBr < NaCH3CO2 < NaOH. Recall that NH4Br yields an acidic solution while NaCH3CO2 yields a basic solution.

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We can see that the specific heat capacity of substance A is greater than that of substance B if the temperature change of A is less than that of B. Option A is correct.

The specific heat capacity is defined as the amount of heat required to raise the temperature of one gram of a substance by one degree Celsius. It is a property of the substance and does not depend on the mass of the sample. In the given scenario, both A and B have equal masses, and the same amount of heat is added to each.

The temperature change is different for both substances. To determine we need to consider the formula:

q = m * c * ΔT

where q is the amount of heat added, m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature.

Since the mass is the same for both substances and the amount of heat added is the same, we can write:

m * c₁ * ΔT₁ = m * c₂ * ΔT₂

Dividing both sides by mΔT gives:

c₁ = c₂ * ΔT₂ / ΔT₁

The specific heat capacity of substance A is larger than that of substance B if the temperature change of A is less than that of B, according to this equation. Option A is correct.

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Answer:

Wheel and axles

Explanation:

Clocks run on a complex system of gear trains. This provides the energy to turn the hands of the clock. A high-ratio gear train gears the weight drum way up so that you don't have to rewind the clock very often. This somehow disengages, slips or ratchets the gear train so the clock can be rewound and set.

Answer: 24.305052 (8 sig figs)  [Mg]

Explanation:  The AMU of each isotope is multiplied by it's percent abundance to yield a weighted average for each isotope.  The sum of these weighted averages will be the wighted average of the element's isotopes:

Isotope    Mass (AMU)     %            Weighted AMU

24Mg 23.985042 78.99% 18.94578468

25Mg 24.985837 10.00%   2.4985837

26Mg 25.982593 11.01%   2.860683489

                                   24.305052 (8 sig figs)

The stereoisomers are the isomers which have the same composition but differ in the orientation in space.

The stereoisomers are the isomers which have the same molecular formula but have different in the three - dimensional space . the single enantiomers are the one which are not superimposable to the mirror image of each other. this means, the enantiomers of the chemical compound have the same molecular formula but have the differenr spatial arrangement.

The diastereomers are the compounds which have the same molecular formula but they are not mirror image of each other and non superimposable to each other.

The question is incomplete, I answer the question in general according to my knowledge.

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2 HCl(aq) + Sr(OH)₂(aq) → SrCl₂(aq) + 2 H₂O(l).

Complete neutralization occurs when strong acids such as hydrochloric acid and HCl are mixed with strong bases such as sodium hydroxide and NaOH. Strong acids and strong bases decompose or completely dissociate into their constituent ions when dissolved in water. When a strong acid reacts with a strong base, the resulting salt is neither acidic nor basic.

Neutral. For example, when HCl hydrochloric acid a strong acid reacts with NaOH a strong base the resulting salts are sodium chloride and water. In a neutralization reaction, an acid reacts with an equimolar amount of base to form salt and water. An example would be the reaction between a strong acid and a base. The sodium chloride formed is the result of the neutralization reaction.

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Answer:

atoms contain tiny negatively charged subatomic particles or electrons

Given that the nitric acid solution contains 70% nitric acid, this means that for every 100g of the solution, there are 70g of nitric acid. Hence, the remaining 30g is water.Since the question requires the molarity of the solution, we need to first calculate the number of moles of nitric acid in the solution.

Number of moles of nitric acid = Mass of nitric acid / Molar mass of nitric acid Molar mass of nitric acid, HNO3 = 1(atomic mass of hydrogen) + 14(atomic mass of nitrogen) + 3(atomic mass of oxygen) = 63 g/mol For the given solution,Mass of nitric acid = 70g Number of moles of nitric acid = 70/63 = 1.1111 mol Now, we need to calculate the volume of the solution containing 1.1111 mol of nitric acid.

Assuming the density of the solution to be 1 g/mL, the volume of the solution containing 1.1111 mol of nitric acid is given by,Volume of solution = 1.1111 mol / 1 g/mL = 1.1111 L Thus, the molarity of the nitric acid solution is: Molarity, M = Number of moles / Volume of solution M(HNO3) = 1.1111 mol / 1.1111 L = 1 M Ans: M(HNO3) = 1 M

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The final concentration of the reactant of a first order reaction can be determined from the rate constant equation. The concentration of ammonium carbonate after 39 s will be 0.003 M.

Rate constant of a reaction is the rate of reaction when one molar concentration of the reactant is involved in the reaction. The expression for the rate constant k for first order reaction is :

k = 1/t ln (C0/Ct)

Where C0 be the initial concentration and Ct be the concentration after t seconds.

Given that C0 of ammonium nitrate = 0.957 M

rate constant = 0.196 /s

t = 39 s.

The concentration after 39 seconds is calculated as follows:

0.196 /s = 1/39s ln (0.957 M / Ct)

Ct = 0.957 / (ln⁻¹ (0.196 × 39))

    = 0.003 M.

Therefore, the concentration of ammonium carbonate after 39 seconds will be 0.003 M.

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From the calculation, the percentage of water in the sodium hydroxide sample is 7%.

The term neutralization has to do with the reaction between an acid and a base to yiled salt and water.

Now we have  to apply the titration formula;

CAVA/CBVB = NA/NB

CA = concentration of acid

CB = concentration of base

VA = volume of acid

VB = volume of base

NA = number of moles of acid

NB = number of moles of base

The reaction equation is; HCl + NaOH ----->NaCl + H2O

CAVANB = CBVBNA

CB = CAVANB /VBNA

CB = 34.9 * 0.2 M * 1/10 * 1

CB = 0.698 M

Number of moles = Conncentration * volume

= 0.698 M * 100/1000 L = 0.0698 moles

Mass = Number of moles * molar mass

Mass =  0.0698 moles * 40 g/mol = 2.79 g

percent of NaOH = 2.79 g/ 3g * 100/1 = 93%

Percent of water = 100- 93 = 7%

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Answer:

Its a punnet square

Explanation:

Sand, seawater, and salt are substance because all of these matter has a specific composition and specific properties.

A substance is defined as a matter which has a specific composition and properties. A compound is a mixture that is the same or uniform throughout. Think of the example of salt water. This is also called a "homogenous mixture." A blend that is not a solution is not constant throughout. Saltwater is a homogeneous mixture or a solution. Soil is collected from small pieces of a variety of materials, so it is a heterogeneous mixture. Water is a substance; more correctly, because water is controlled by hydrogen and oxygen, it is a compound.

So we can conclude that Salt and other combination can only be decomposed into their elements by a chemical process.

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The equilibrium constant for the system at this temperature is\(1.17 × 10^-31 mol^2/L^2\).

For the chemical equation:

N2(g) + O2(g) ⇌ 2NO(g)

The equilibrium mixture at a temperature of 1500 K is determined to contain 6.4 × 10^-3 mol/L of N2,\(1.7 × 10^-3\)mol/L of O2 and 1.1 × 10^-5 mol/L of NO.  First, we need to calculate the concentration of N2 and O2 required to produce

1.1 × 10^-5 mol/L of NO:

2NO(g) = N2(g) + O2(g)

Given that there are 1.1 × 10^-5 mol/L of NO, the number of moles of N2 and O2 are equal since the stoichiometric ratio is 1:1. Therefore:

\(1.1 × 10^-5 mol/L\) = [N2][O2]Kc = \(([NO]^2)/([N2][O2])Kc\)= \((1.1 × 10^-5 mol/L)^2/(6.4 × 10^-3 mol/L)(1.7 × 10^-3 mol/L)Kc\) =

1.17 × 10^-31 mol^2/L^2.

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Taking into account the definition of kinetic energy, the object moving with a speed of 24 m/s and a kinetic energy of 356 J has a mass of 1.236 kg.

Kinetic energy is defined as the energy associated with bodies that are in motion.

Kinetic energy is defined as the amount of work necessary to accelerate a body of a certain mass and in a position of rest, until it reaches a certain speed.

Kinetic energy is represented by the following expression:

Ec = 1/2×m×v²

Where:

In this case, you know:

Replacing in the definition of kinetic energy:

356 J = 1/2× m× (24 m/s)²

Solving:

356 J÷ [1/2× (24 m/s)²]= m

1.236 kg= m

Finally, the mass of the object is 1.236 kg.

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