Sodium (Na) tries to fill up its third shell/orbital when it bonds.

Answer:

That is true. They have different properties.

Answer:

I think the correct answer is True

Explanation:

The balanced chemical equation for the reaction between hydrochloric acid (HCl) and sodium bicarbonate \((NaHCO_3)\) is:

\(HCl + NaHCO_3\ - > NaCl + CO_2 + H_2O\)

The coefficients in the balanced equation show that 1 mole of HCl reacts with 1 mole of \(NaHCO_3\) to produce 1 mole of NaCl, 1 mole of \(CO_2\), and 1 mole of \(H_2O\). We need to find the number of moles of \((NaHCO_3)\) present in the tablet.

2 grams of \(NaHCO_3\) is equivalent to 0.02 moles, and 18 grams of HCl is equivalent to 0.45 moles. Since \((NaHCO_3)\) is limiting reagent, only 0.02 moles of NaCl and \(CO_2\) will be produced. The molar mass of \(CO_2\) is 44 g/mol, so the mass of \(CO_2\) produced is 0.88 g. The molar mass of NaCl is 58.44 g/mol, mass of NaCl produced is 1.17 g.

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Answer:

6.12 L

Explanation:

Given that,

Initial volume, V₁ = 5 L

Initial temperature, T₁ = 7.0°C = 343 K

Final temperature, T₂ = 147°C = 420 K

We need to find its new volume. The relation between volume and temperature is given by :

\(\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}\\\\V_2=\dfrac{V_1T_2}{T_1}\\\\V_2=\dfrac{5\times 420}{343}\\\\V_2=6.12\ L\)

So, the new volume is 6.12 L.

Answer:

The strong force binds quarks together in clusters to make more-familiar subatomic particles, such as protons and neutrons. It also holds together the atomic nucleus and underlies interactions between all particles containing quarks. The strong force originates in a property known as colour.

Explanation:

Answer:

K = 0.0209

Explanation:

K = \(\frac{[H_{2}][I_{2}]}{[2HI]^{2}}\)

K = \(\frac{[4.35 x 10^{-2} ][2.79 x 10^{-2} ]}{[0.241]^{2} }\)

K = 0.0208958

K = 0.0209

Answer:

conservation of mass

The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.

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Answer:

it c

Explanation:

because it's supposed to be untangled so nothing will happen to it because if it's Tangled bad stuff what happened to it and it will broke

B. An electron EMITS a photon as it goes from a HIGHER TO LOWER energy level.

When an electron in an atom drops from a higher energy level to a lower energy level, it releases energy in the form of a photon.

What is Spectrum?

In science, the term "spectrum" is often used to describe the range of colors of visible light, known as the "visible spectrum," which includes all the colors of the rainbow. This spectrum is produced when white light is dispersed into its component colors by a prism or other means.

This energy is specific to the atom and its electron configuration, which is why each atom emits a unique set of wavelengths, creating a distinct emission spectrum.

Since the emission spectrum in the question has a line in the blue region, it means that the energy released by the electron corresponds to a specific frequency or wavelength in the blue region of the visible spectrum.

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Based on the given data, the relationship between rate and concentration is exponential.

A proposed rate law for the reaction based on the given data is:

Collision theory suggests that the rate of a chemical reaction is proportional to the frequency and energy of collisions between the reactant molecules.

As the concentration of iodate ions decreases, the frequency of collisions between reactant molecules decreases, which leads to a decrease in the rate of the reaction.

At higher temperatures, the kinetic energy of the reactant molecules increases, which increases the frequency and energy of collisions between reactant molecules.

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Answer:

The answer is B

Brainliest please!

The Ksp of FeCO₃ is 3.45x10-11 and the Ksp of CdCO₃ is 8.7x10-12.

Ksp is a mathematical expression used to predict the behavior of a saturated solution. It is an abbreviation of the term “solubility product constant”, and is derived from the thermodynamic equilibrium equation that exists between a solid and its dissolved ions in a solution. Ksp is used to predict the solubility of a given ionic compound, and is a measure of the maximum amount of solute that can be dissolved in a given solvent at a given temperature and pressure.

To initiate precipitation, the concentration of CO²⁻₃ must be greater than or equal to the solubility product of the least soluble salt, which is CdCO₃.
Therefore, the concentration of CO²⁻₃ must be greater than or equal to 8.7x10-12 M.

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Answer:

1.674 x 10^-23 grams

Explanation:

Hydrogen-1 is called Protium

wikipedia

atomic mass of Protium is 1.00794 amu

sciencedirectcom

atomic mass of 10 Protiums is 10.0794 amu

10.0794 amu in grams is

1.6737236x10^-23 grams

Answer: 6.02214076 atoms Ca

Explanation:

Ca is monoatomic, so atoms in 1 mol = avogadro number

Answer:

Path length is the overall distance traveled following the path of where the object travel. ... Displacement is the distance from the starting point of the object to its final point irregardless where it travels.

Answer:

12

Explanation:

Let's consider the basic reaction of methylamine.

CH₃NH₂ + H₂O ⇄ CH₃NH₃⁺ + OH⁻

The concentration of the weak base is Cb = 0.195 M and the basic dissociation constant is Kb = 4.4 × 10⁻⁴. We can calculate the concentration of OH⁻ using the following expression.

[OH⁻] = √(Kb × Cb)

[OH⁻] = √(4.4 × 10⁻⁴ × 0.195) = 9.3 × 10⁻³ M

The pOH is:

pOH = -log [OH⁻] = -log 9.3 × 10⁻³ = 2.0

The pH is:

pH + pOH = 14

pH = 14 - pOH = 14 - 2.0 = 12

The pH of the 0.195 M methylamine solution has been 12.0.

The pH of the solution has been defined as the hydrogen ion concentration in the sample. The pOH has been the hydroxide ion concentration in the sample.

From the Kb of the methylamine, the hydroxide ion concentration of the solution can be determined as:

[\(\rm OH^-\)] = \(\rm \sqrt{Kb\;\times\;concentration}\)

[\(\rm OH^-\)] = \(\rm \sqrt{4.4\;\times\;10^-^4\;\times\;0.195}\)

[\(\rm OH^-\)] = 9.3 \(\rm \times\;10^-^3\) M

The pOH of the solution can be calculated as:

pOH = -log [\(\rm OH^-\)]

pOH = -log 9.3 \(\rm \times\;10^-^3\)

pOH = 2.0

The sum of pH and pOH has been a constant quantity.

pH + pOH = 14

pH + 2 = 14

pH = 14 - 2

pH = 12.0

The pH of the 0.195 M methylamine solution has been 12.0.

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Answer:

After 47.9 days, will remain 14.5mg of the isotope

Explanation:

The radioactive decay follows always first-order kinetics where its general law is:  

Ln[A] = -Kt + ln[A]₀

Where [A] is actual concentration of the atom, k is rate constant, t is time and [A]₀ is initial concentration.

We can find rate constant from half-life as follows:

\(t_{1/2} = \frac{ln2}{K}\)

K = ln 2 / 27.7 days

K = 0.025 days⁻¹

Replacing, initial amount of isotope is 48.0mg = [A]₀ , K is 0.025 days⁻¹ and t = 47.9 days:

Ln[A] = -Kt + ln[A]₀

Ln[A] = -0.025 days⁻¹*47.9 days + ln (48.0mg)

ln [A] = 2.6726

[A] = e^ (2.6726)

[A] = 14.5mg

Answer:

D.sandals

Explanation:

I think we need to wear shoes......so to protect or cover our feet

Answer:13.8

Explanation:

When scientists say that a theory can never be proven, they mean that it is not possible to conclusively demonstrate its truth. The word "theory" in science refers to a body of knowledge that has been well-established through rigorous testing and observation. However, this does not mean that it is an absolute truth.

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Answer:

from the chromosome..l dont know

The concentration of carbon monoxide at equilibrium is 0.209 M.

CO2 = 2 mol/5 L = 0.4

H2 = 1.5 mol/5L = 0.3

Create ICE table as shown below

        CO2(g)    +     H2(g) ↔       CO(g)    +     H2O(g)

I          0.4               0.3                0                  0

C        - x                 - x                 x                   x

E        0.4 - x           0.3 - x           x                   x

Kc = [CO][H₂O] / [CO₂][H₂]

2.5 = (x²)/(0.4 - x)(0.3 - x)

x² = 2.5(0.4 - x)(0.3 - x)

x² = 2.5(0.12 - 0.7x + x²)

x²  = 0.3 - 1.75x + 2.5x²

0 = 1.5x² - 1.75x + 0.3

solve the quadratic equation using formula method;

x = 0.209

Thus, the concentration of carbon monoxide at equilibrium is 0.209 M.

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Answer:

im gonna say b

Explanation:

Answer:

In a neutral molecule, the sum of the bonding valance electrons must be equal. So the products of the negative element and its charges and the positive element and its charge must be equal.

Explanation:

C1×N1 = C2×N2

If we have a 3 valance electrons , the 'A' charge will be either +3 or -5 for a full octet and valance electron in 'B' atoms will mostly result in acquisition of additional electrons (2) for an octet and relative charge of -2.

Balancing the two,

3 × A = -2 × B

To be equal, A = 2 and B = 3

Therefore, A²B³

Answer:Finish What You Start Dominate Technology Know Your Enemy dress to kill

Explanation:

Answer:

sorry I don't understand this question

Answer:

0.4941, 0.5059

Explanation:

\(P_N\) = Partial pressure of nitrogen = 417 mm Hg

\(P_{Xe}\) = Partial pressure of xenon = 427 mm Hg

Total pressure in the system is given by

\(P=P_N+P_{Xe}\\\Rightarrow P=417+427=844\ \text{mm Hg}\)

Mole fraction is given by

\(X_N=\dfrac{P_N}{P}\\\Rightarrow X_N=\dfrac{417}{844}\\\Rightarrow X_{N}=0.4941\)

For xenon

\(X_{Xe}=1-0.4941=0.5059\)

or

\(X_{Xe}=\dfrac{P_{Xe}}{P}\\\Rightarrow X_{Xe}=\dfrac{427}{844}\\\Rightarrow X_{Xe}=0.5059\)

So, mole fraction of nitrogen is 0.4941 and xenon is 0.5059.