The atomic number of an atom is determined by the number of a. protons. b. electrons. c. neutrons. d. isotopes

Eliminate the polish. The present product's ledge should be rounded off. Rework and improve enhancement. Buff. Smooth. Clean. Apply primer and nail dehydrator. Put on some liquid and powder.

The right way to apply one-color monomer liquid and polymer powder nail enhancements to natural nails and their tips, Reverse the eponychium. buffed a nail Utilize a nail dehydrator. Put nail primer on. In serrated dapper dishes, add monomer and polymer powder. Brush into monomer liquid and blot excess with paper towel. Brush into powder and coat. Put a pink product in the nail's middle. Form the improvement. Put the second bead on top of the previous one. Free edge may be shaped with mild abrasive. Buffed a nail hand cream and polish from applu.

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The pressure in the compartment would be approximately 52.29 atmospheres

The ideal gas law equation can be applied here: PV = nRT

where P is the pressure (in atmospheres or Pascals).

Volume (measured in litres)

The number of moles is n.

R = 0.0821 L atm/mol K, the ideal gas constant.

Temperature (in Kelvin) equals T.

The provided temperature must first be converted from Celsius to Kelvin:

T(K) equals T(°C) plus 273.15 K = 45.0 + 273.15 K = 318.15 K

We may rearrange the ideal gas law equation to solve for pressure if the volume is 0.050 L, we want to determine the pressure, and we have the same number of moles of N2 as in the prior situation.

P = (nRT) / V

P = (1 mol * 0.0821 L atm/mol K * 318.15 K) / 0.050 L P = 52.29 atm is the result of substituting the variables.

Consequently, 52.29 atmospheres would be the compartment's pressure.

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Answer:

CO32-

Explanation:

Seawater taken from an area with a large, growing plant population has high O2 and low nutrient content.

The presence of a large plant population in a body of water affects the content of oxygen and nutrients. Oxygen production increases when there is a greater amount of photosynthesis taking place, which occurs when there is a large population of plants.

The increase in oxygen levels in turn results in a decrease in nutrient content since many of these nutrients are utilized during the process of photosynthesis. Alternatively, the other options such as low CO2 and high nutrient content, low O2 and low nutrient content, high O2 and high CO2 content, none of these is correct are incorrect.

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Answer:

OPTION C is correct

When magnesium burns, it combines with oxygen (O2) from the air to form magnesium oxide (MgO) according to the following equation: 2Mg(s) + O2(g) → 2MgO(s) Magnesium oxide is an ionic compound containing Mg2+ and O2− ions whereas Mg(s) and O2(g) are elements with no charges.

Answer:

genatics play a huge part. Your mom may be on the tall side or may have cheated on your father. Plus she may of gotten married before you and her father where married or you may of allready been born before she meant your father meaning you have a differnt biological dad then you think.

Explanation:

Hope This Helps

Have A Great Day

~Zero~

Answer:

its D

Explanation:

Brooke should turn so that her back is to the Sun to her wall, and hold the Moon (ball representing Moon) in front of her. Therefore, option (D) is correct.

The eclipse of the moon occurs when the earth comes in between the sun and the moon. The earth blocks the light coming from the sun from reaching the surface of the moon and casts its shadow on the moon.

A lunar eclipse occurs on a full moon day and can be observed up to 3 lunar eclipses per year.  A lunar eclipse can be categorized depending on how the sun, the moon, and the earth line up.

A partial lunar eclipse is when only a part of the moon moves into the shadow's earth. A total lunar eclipse is when the earth crossed directly in front of the moon and casts its shadow.

If Brooke's head is earth then it will be in the center and her back will be towards to sun poster on the wall. So that the ball in her hand can play as a moon to show the lunar eclipse.

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Answer

The structural formula are similar to molecular formulas but show how atoms are bonded together.

Explanation:

The structural formula for a compound gives the same information as its molecular formula (the types and numbers of atoms in the molecule) but also shows how the atoms are connected in the molecule.

If only serine (C3H7NO3) is being formed, the element that would be used up first in the flask is hydrogen (H).

This is because the molecular formula of serine contains three hydrogen atoms, while all other elements (carbon, nitrogen, and oxygen) have more than three atoms in the formula.

In the molecular formula of serine (C3H7NO3), there are three carbon atoms (C), one nitrogen atom (N), three oxygen atoms (O), and three hydrogen atoms (H). If only serine is being produced in the flask, the number of atoms of each element should remain constant throughout the reaction.

Since there are three hydrogen atoms in the serine molecule, the available hydrogen atoms will be consumed first as serine is formed. Once all the hydrogen atoms are used up, the reaction will not be able to produce any more serine molecules since there is no additional hydrogen to combine with other atoms.

Therefore, hydrogen would be the element that is used up first in the flask if only serine is being made.

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To solve this we must be knowing each and every concept related to mole and  and its calculations. Therefore, 388.15g  is the mass of 3.5 moles of CaCl\(_2\).

A mole is merely a measuring unit. In reality, it is one of International System of Units' seven foundation units (SI). When basically determines are insufficient, new units are created.

Chemical reactions frequently occur at levels that use grams would be inappropriate, but using actual figures of atoms/molecules/ions would also be misleading.

It's much easier to write' mole' than '6.02x10²³' whenever you wish to refer to a huge number of things. That is essentially why and how this particular component was created.

mole =given mass ÷ molar mass

moles of CaCl\(_2\) = 3.5 moles

Molar mass of CaCl\(_2\) =110.9g/mol

mass of  CaCl\(_2\) =3.5 moles × 110.9g/mol

                        =388.15g

Therefore, 388.15g  is the mass of 3.5 moles of CaCl\(_2\).

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Answer:

A. two or more atoms held together with bonds make up a molecule. 

Explanation:

mark brainiest pls <3

Answer:

grese

Explanation:

Any liquid could absorb and release thermal energy. However, a refrigerant or a coolant absorbs heat and releases it to any area faster than any ordinary liquid such as water. So to complete the sentence: A refrigerant/cooler is a liquid that absorbs and releases thermal energy

Answer:

Coolant

Explanation:

Every liquid does that but

Coolant does it the fastest

The atom in a water molecule that points towards the sodium ion is the oxygen atom. Oxygen has a partial negative charge (δ-) due to electronegativity, which creates attraction with positively ions sodium (Na+).

In a water molecule, two hydrogen atoms are bonded to the oxygen atom, and the resulting structure is called a molecule. Molecules are formed by the combination of two or more atoms held together by chemical bonds. In the case of water, the atoms are hydrogen and oxygen, and they form a covalent bond, which means they share electrons to create stability.
When sodium ions (Na+) are dissolved in water, they become surrounded by water molecules due to their electrostatic attraction to the partial negative charge of the oxygen atoms. This process is called hydration or solvation, and it stabilizes the ionic compounds in water. The interaction between water molecules and ions is crucial in many biological and chemical processes, such as the transport of nutrients across cell membranes and the formation of mineral deposits.
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The skeletal line-bond structure of (r)-1-ethyl-3-ethynyl-cyclohex-1-ene is as follows:

A disubstituted cyclohexene molecule contains an ethyl group on C1 and an ethynyl group on C3.

To represent the dash or wedge bond structure we have to first identify the asymmetric centers in the molecule.

An organic compound's skeletal structure was made up of a group of atoms that also are joined together to form the compound's fundamental structure. Chains, branches, and/or rings of bound atoms can make up the skeleton. Heteroatoms were skeletal atoms that are not carbon as well as hydrogen.

The asymmetric center in the cyclohexene molecule is C-3 in the cyclohexene so the dash and wedge structure can also be shown as follows:

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According to the American Chemistry Society, cloth-topped "tennis" or "running" shoes are recommended for general laboratory work. Sandals, woven leather shoes, and high heels are not recommended as they do not provide adequate protection for the feet  against spills or dropped objects in a laboratory setting.
The American Chemical Society is a scientific society based in the United States that supports scientific research in the field of chemistry.

Other safety precautions include: Wearing appropriate gloves, masks, lab coat and shoes. Being careful while using pipette. Washing the glassware properly before using etc.

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The transformation efficiency of E. coli HB101 using calcium chloride can vary depending on the experimental conditions and the protocol used.

However, transformation efficiency is a measure of how many bacterial cells take up the foreign DNA and become genetically transformed, usually reported as the number of transformants per microgram of DNA. To calculate the transformation efficiency of E. coli HB101 using calcium chloride, follow the 5 steps:

1. Perform a transformation experiment using E. coli HB101 and calcium chloride. This usually involves treating the bacterial cells with calcium chloride to make them more permeable to foreign DNA, then exposing them to the DNA of interest.

2. Plate the transformed cells on selective agar plates that will allow only the transformed cells to grow.

3. Count the number of transformant colonies that appear on the selective agar plates after a suitable incubation period.

4. Determine the amount of DNA (in micrograms) used in the transformation experiment.

5. Calculate the transformation efficiency by dividing the number of transformant colonies by the amount of DNA used.

The result will be in the unit of transformants per microgram of DNA. Keep in mind that the transformation efficiency can be influenced by factors such as the quality and concentration of the DNA, the bacterial strain, and the specific experimental conditions. Therefore, the transformation efficiency for E. coli HB101 using calcium chloride may differ between experiments and laboratories.

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Answer:

Option B. It is a basic solution.

Explanation:

To know which option is correct, let us calculate the pH of the solution.

First, we shall determine the pOH of the solution. This is illustrated below:

Concentration of Hydroxide ion, [OH¯] = 3.5×10¯⁶

pOH =.?

pOH = –Log [OH¯]

pOH = –Log 3.5×10¯⁶

pOH = 5.5

Finally, we shall determine the pH. This can be obtained as follow:

pOH = 5.5

pH =?

pH + pOH = 14

pH + 5.5 = 14

Collect like terms

pH = 14 – 5.5

pH = 8.5

The pH scale reads as follow:

0 to 6 => Acidic

7 => Neutral

8 to 14 => Basic

Comparing the pH of the solution (i.e 8.5) with the pH scale, we can conclude that the solution is basic because the pH of solution lies between 8 and 14.

Answer:

I think it would be b

Explanation:

pls correct me if im wrong!

The amount of millimoles of solid naoh that must be added to 50.0 milliliters is: 5.0 mmol of NaOH.

The [H+] at pH 7.49 is:

[H+] = 10–^7.49

[H+]= 3.24×10–^8 M

And when the solution is half-neutralized pH will be:

pH = pKa while  [OCl– ]÷[HOCl] = 1

Now let find the millimoles of solid naoh:

0.20 mol HOCl÷1 L× 50.0 mL

= 10.0 mmol HOCl

Half of 10.0 mmol HOCl will be added

Millimoles of solid naoh=10.0 mmol HOCl÷2

Millimoles of solid naoh= 5.0 mmol of NaOH

Inconclusion the amount of millimoles of solid naoh that must be added to 50.0 milliliters is: 5.0 mmol of NaOH.

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Answer:

The volume(V) of gas will increase when the pressure of the gas decreases assuming all the other variables are held constant.

Explanation:

My reaction to the claim that human remains dated at 10 million years old were found in Asia using carbon-14 dating would be one of skepticism. Carbon-14 dating is not reliable for dating objects older than about 50,000 years.

Carbon-14 has a half-life of approximately 5,730 years, meaning that it decays over time and becomes undetectable after a certain point. Therefore, using carbon-14 dating to determine the age of remains from 10 million years ago would not provide accurate results. To accurately date remains from such an ancient period, other dating methods like potassium-argon dating or uranium-lead dating would be more appropriate. In conclusion, carbon-14 dating is not suitable for determining the age of human remains that are 10 million years old due to its limited range of accuracy.

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Answer:Re3(PO4)2 I think I'm wrong

Explanation:

Answer: D. 4

Explanation:

For numbers with decimal point, we should start counting from the first number that non-zero from the left.

0.0001372

We start counting from 1, since it is the first non-zero number

1, 3, 7, 2

There are in total 4 significant figures

Hope this helps!! :)

Please let me know if you have any question or need further explanation

Answer:

Explanation:

The responding variable always is measured against the variable that you have control over.

In this case, you have control over the volume of air.

The responding variable is the amount the plant has grown.  This would be a good long term experiment to try for a science fair or just because you might be interested. It's a good simple idea.

Answer:

helps to trap heat in our atmosphere

By substituting this value into the Henderson-Hasselbalch equation, we can determine the pH of the solution after the addition of 0.00 mL HNO3.

First, let's determine the initial concentration of aziridinium and the amount of HNO3 added. The initial volume of the aziridine solution is 60.0 mL, and the concentration of aziridine is 0.0750 M.For the addition of 0.00 mL HNO3 (no HNO3 added), the concentration of HNO3 is 0 M. Therefore, we will only consider the aziridine concentration for this case.To calculate the pH, we need to determine the concentration of aziridinium, which can be obtained through the Henderson-Hasselbalch equation:pH = pKa + log([base]/[acid]). In this case, the acid is aziridinium and the base is its conjugate base (aziridine). Since the concentration of aziridine ([base]) is given as 0.0750 M, we can substitute the values into the equation:pH = 8.04 + log(0.0750 M / [acid]).To find [acid], we can use the equation for the dissociation constant:Ka = [H+][A-] / [HA]
Where [H+] represents the concentration of acid (aziridinium in this case), [A-] is the concentration of the conjugate base (aziridine), and [HA] is the concentration of the unionized acid.We can rearrange the equation to solve for [acid]:[acid] = (Ka * [HA]) / [A-]. Since the initial concentration of aziridine ([A-]) is 0.0750 M and the pKa is given as 8.04, we can calculate the concentration of aziridinium ([acid]) using the formula above.By substituting this value into the Henderson-Hasselbalch equation, we can determine the pH of the solution after the addition of 0.00 mL HNO3.

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The nuclear equation for the alpha decay of Uus-294 is

\(^{294}{117} Uus\) →\(^{4}{2}He + ^{290}_{115}Mc\)

To complete the nuclear equation for the alpha decay of Uus-294, we need to determine the missing product.

During alpha decay, the emission of an alpha particle, composed of two protons and two neutrons, leads to the formation of a new nucleus.

The balanced nuclear equation for the alpha decay of Uus-294 can be represented as follows:

\(^{294}{117} Uus\) → \(^{4}{2}He +\)_____(missing product)

In this equation, the atomic number of the missing product must be two less than the atomic number of Uus-294 (117 - 2 = 115), and the mass number of the missing product must be four less than the mass number of Uus-294 (294 - 4 = 290).

Based on this information, the missing product can be identified as:

\(^{290}_{115}Mc\)

Mc stands for Moscovium, which has an atomic number of 115. By subtracting two from the atomic number of Uus, we obtain the atomic number of Mc. The mass number of Mc-290 is obtained by subtracting four from the mass number of Uus-294.

Therefore, the  nuclear equation for the alpha decay of Uus-294 is:

\(^{294}{117} Uus\)→ \(^{4}{2}He + ^{290}_{115}Mc\)

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The complete question is :

Complete this nuclear equation for the alpha decay of Uus-294 by writing a

notation for the missing product:

\(^{204} {117} Uns\)→\(^{4} _{2} He +\)_____