draw a well-labelled diagram showing how your body digests food​

Answer:

False

Explanation:

Answer:

4 P(s, white) + 5 O₂(g) ⇒ P₄O₁₀(s)

Explanation:

The standard enthalpy of formation of P₄O₁₀(s) is the energy required to synthesize 1 mol of P₄O₁₀(s) from the simple substances in their most stable form. The corresponding balanced chemical equation is:

4 P(s, white) + 5 O₂(g) ⇒ P₄O₁₀(s)

P(s, white) is the most stable allotropic form of phosphorus. The standard enthalpy of formation of P₄O₁₀(s) is -2984 kJ/mol.

Answer:

its D:)

Explanation:

Answer:B electrons fill orbitals In order of their increasing energy from left to right

Explanation:

Answer:

I think it's B

Explanation:

Well I'm pretty sure it's not C or D. And A is detachment or removal of soil by water, And the picture doesn't look like that. So the only explanation is B

Answer:

I go for B.

Explanation:

Answer:

0.06520959450500399

Explanation:

Answer:

46.0055

Explanation:

Answer:

Option D.

Explanation:

The correct answer is option D that is Trigonal planar because of the data or following information given from the question;

=> "one atom belonging to an element in group 14".

This means that one atom has a lesser electronegativity. And this atom will be the central atom (reason: central atoms have less electronegativity).

=>" two atoms belonging to an element in group 1"

One of the characteristics of group one is it ability to form only one bond, here we will be considering the number of bonds which is one.

=>" one atom belonging to an element in group 16."

Here, we have two bonds.

Thus ,the molecules has one single bonds for each atoms and one double bonds for the last description. We have 3 atoms bonded at 120° each to the central atom.

Answer:

Explanation:

Initial burette reading = 1.81 mL

final burette reading = 39.7 mL

volume of NaOH used = 39.7 - 1.81 = 37.89 mL .  

37.89 mL of .1029 M NaOH is used to neutralise triprotic acid

No of moles contained by 37.89 mL of .1029 M NaOH

= .03789 x .1029 moles

= 3.89 x 10⁻³ moles

Since acid is triprotic ,  its equivalent weight = molecular weight / 3

No of moles of triprotic acid = 3.89 x 10⁻³ / 3

= 1.30   x 10⁻³ moles .

Answer:

13

Explanation:

is the atomic number of AI

A compound is a substance made up of 2 or more elements

Explanation:

The larger the radius of an atom, the lesser the electronegativity of the atom. This is because of the screening effect.

The average atomic mass of Rubidium : 85.556 u

Isotopes are atoms that have the same atomic number but different mass numbers

Each isotope has an abundance which is usually expressed as a percentage

The average relative mass of atoms is obtained by adding the product of the percentage and mass of each isotope

Can be formulated:

[tex]\tt Average~Mass~atom~X=mass~isotope~ 1\times \%1+mass~isotope~2\times \%2+..[/tex]

The abundance of ​ 85​ Rb is 72.2% and the abundance of 87​ Rb is 27.8%, so

mass isotope 1=85, %abundance=72.2

mass isotope 2=87, %abundance=27.8

The averages atomic mass of Rubidium :

[tex]\tt average~atomic~mass=85\times 0.722+87\times 0.278\\\\average~atomic~mass=61.37+24.186\\\\average~atomic~mass=\boxed{\bold{85.556~u}}[/tex]

Answer:

Explanation:

i think B im not sure

Answer:

Wind energy

Explanation:

Answer: Wind energy

Explanation:

Answer:

158.033944 g/mol

Explanation:

Answer:

how the heck did you think of a question like this

Explanation:

Answer:

the answer is +5

Explanation:

good luck :)

use the periodic table the atomic number of copper is 29 so neutral copper atoms have 29 protons and 29 electrons to estimate the number of neutrons in the atom round the atomic mass to 64 and subtract the atomic number the atomic number is the number of protons. do the same thing for gold and u have your atomic models for each.

Answer:

Fe(NO3)2

Explanation:

Out of all the options, the compound that can be dissolved in water is Fe(NO₃)₃.

Fe(NO₃)₃ or Iron Nitrate is capable of being dissolved in water at 25°C. This is in line with its properties as a nitrate because most nitrates are soluble in water at room temperature.

Other properties and uses of Nitrates include:

In conclusion, Iron Nitrate is soluble in water at the room temperature of 25°C.

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Answer:

Blue- I took the test

Explanation:

Answer:

2 hours and 4 mins

Answer:

a because hot moves to cold

Explanation:

Answer:

Conduction

Explanation:

The handle is touching the pot.

And I got it wrong

Answer: C.) K is limiting, 11.2 g of [tex]K_2O[/tex] formed

Explanation:

To calculate the number of moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]

Putting in the values we get:

[tex]\text{Number of moles of potassium}=\frac{9.30g}{39.10g/mol}=0.238moles[/tex]

[tex]\text{Number of moles of oxygen}=\frac{2.50g}{31.99g/mol}=0.0781moles[/tex]

[tex]4K+O_2\rightarrow 2K_2O[/tex]

According to stoichiometry :

4 moles of [tex]K[/tex] require 1 mole of [tex]O_2[/tex]

Thus 0.238 moles of [tex]K[/tex] will require=[tex]\frac{1}{4}\times 0.238=0.0595moles[/tex]  of [tex]O_2[/tex]

Thus [tex]K[/tex] is the limiting reagent as it limits the formation of product and [tex]O_2[/tex] is the excess reagent.

As 4 moles of [tex]K[/tex] give = 2 moles of [tex]K_2O[/tex]

Thus 0.238  moles of [tex]K[/tex] will give =[tex]\frac{2}{4}\times 0.238=0.119moles[/tex]  of [tex]AgCl[/tex]

Mass of [tex]K_2O=moles\times {\text {Molar mass}}=0.119moles\times 94.2g/mol=11.2g[/tex]

Thus K is limiting and 11.2 g of [tex]K_2O[/tex] will be formed.

Answer:

compound

Explanation:

Answer:

true i think but dont take my word for it.✌

According to the electronic configuration, carbon has 4 valence electrons that makes it a very stable atom that readily bonds.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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Answer: 90%

Explanation:

So we need to find the molar mass of the entire compound, and the mass of carbon times the number of molecules:

Molar mass: 3*12 + 4*1 = 40

Mass of carbon: 12*3 = 36

36/40 * 100 = 9/10 * 100 = 90%

Answer:

[tex]2.5[/tex] × [tex]10^{-4}[/tex]

Explanation:

[tex]5+10^{-5} + 2[/tex] × [tex]10^{-4} = 0.5[/tex] × [tex]10^{-4} + 2[/tex] × [tex]10^{-4}[/tex]

[tex]0.5[/tex] × [tex]10^{-4} + 2[/tex] × [tex]10^{-4}[/tex] = [tex]2.5[/tex] × [tex]10^{-4}[/tex]

In the provided issue, the scientific notation-expressed integers 5.0x10-5 and 2.0x10-4 are added, and the solution is 2.5x10^-4.

Thus, first transform the smaller integer to have the same exponent as the larger number in order to complete the addition. In this situation, by shifting the decimal point one position to the right, we rewrite 5.0x10-5 as 0.5x10-4.

The outcome of adding the numbers together is 2.5. Finally, we use the common exponent—in this example, -4—to express the result in scientific notation. The final solution is 2.5x10^-4 as a result. Therefore, by adjusting the exponent and adding the numbers, the final solution, 2.5x10^-4 is obtained.

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