Please help I’ll mark brainliest!

Answer:Your circulatory system delivers oxygen-rich blood to your bones. Meanwhile, your bones are busy making new blood cells. Working together, these systems maintain internal stability and balance, otherwise known as homeostasis

Explanation:

Answer: Except for gamma decay or internal conversion from a nuclear excited state, the decay is a nuclear transmutation resulting in a daughter containing a different number of protons or neutrons (or both). When the number of protons changes, an atom of a different chemical element is created.

Explanation:

depends on the situation, but scientifically, Einstein's theory of special relativity sets the speed of light, 186,000 miles per second (300 million meters per second). But some scientists are exploring the possibility that this cosmic speed limit changes. The speed of light is constant, or so textbooks say. (google)

Answer:

b. Mg & Cl

a. transferred

46

Explanation:

Ionic bonds form between metals and non-metals when electrons are transferred from one specie to another.

Since Mg and Cl are the only metal - non-metal pair, and ionic bond will form between them.

2.

  In the specie;

          ₄₇Ag¹⁺

47 is the atomic number of the element Ag.

The atomic number is the number of protons in an atom. For a specie in neutral state, the number of protons and electrons are the same.

Answer:

I believe the answer is B

Explanation:

A nucleus of an atom has protons and neutrons. We know that a proton has a charge of +1 , while a neutron has no charge, or 0 . Therefore, the nucleus of an atom will always have a positive charge.

Answer: n = 1 can hold a maximum of 2 electrons

n = 2 , maximum 8 electrons

n = 3, maximum 18 electrons

As per the principles of quantum mechanics, the number of electrons that can be added to a given energy level is deduced based on the three quantum numbers: n, l , m(l) and m(s)

'n' is the principal quantum number which defines the energy level. It can take on integer values: 0,1,2,3...

'l' is the angular momentum quantum number which defines the shape of the orbital that an electron occupies

l = 0,1,2...(n-1)

where: l = 0 corresponds to s-orbital

l = 1 corresponds to p-orbital

l = 2, corresponds to d-orbital

'm(l)' is the magnetic moment quantum number which defines the orientation of an orbital  in space.

m(l) = -l, 0, +l

'm(s)' is the spin quantum number which defines the orientation of an electron is an orbital m(s) = +1/2 or -1/2

An s, p or d-orbital can accommodate a maximum of 2, 6 and 10 electrons respectively For energy level with n= 1

l = 0, i.e. s-orbital or 1s.

Therefore, the maximum number of electrons for a 1s orbital would be 2 resulting in an electron configuration of 1s²

For energy level with n= 2

l = 0, 1 i.e. s and p-orbitals

The maximum number of electrons would be

Electron configuration: 2s²2p⁶

For energy level with n= 3

l = 0, 1, 2 i.e. s, p and d-orbitals

The maximum number of electrons would be

Electron configuration: 3s²3p⁶3d¹⁰

Answer:

15

Explanation:

im right

Answer:

Explanation:

CH₄ + 2O₂ = CO₂ + 2H₂O

C₂H₄ + 3O₂ = 2CO₂ + 2H₂O

Let volume of CH₄ be V , so volume of C₂H₄ will be 5 - V

CH₄    +    2O₂   =    CO₂   +   2H₂O

1 vol           2 vol

V                2 V

V vol of CH₄   will require 2 V of O₂

C₂H₄     +    3O₂    =    2CO₂   +   2H₂O

5 - V       3( 5 - V )

5 - V vol of C₂H₄ will require 3 ( 5 - V ) vol of oxygen .

Total oxygen required = 2 V + 3 ( 5 - V )

2 V + 3 ( 5 - V ) = 13.2

2 V + 15 - 3V = 13.2

V = 1.8 ml

vol of CH₄ = 1.8

vol of C₂H₄ = 5 - 1.8 = 3.2 ml.

Answer:

the answer should be A if im correct

Explanation:

Answer:

Clouds can block light and heat from the Sun, making Earth's temperature cooler. You've probably noticed this kind of cooldown on a cloudy day. However, some heat from the Sun does get down to Earth. Clouds can trap that heat from the Sun.

Hope that helps :)

Answer:

The answer is 39.948.

Explanation:

you are converting between grams Argon and mole. You can view more details on each measurement unit: molecular weight of Argon or mol The molecular formula for Argon is Ar. The SI base unit for the amount of substance is the mole.

Answer:The answer is 0.025032542304996.

Explanation:

We assume you are converting between moles Argon and gram. You can view more details on each measurement unit: molecular weight of Argon or grams The molecular formula for Argon is Ar. The SI base unit for amount of substance is the mole.

Answer:

0.0582 M

Explanation:

The following data were obtained from the question:

Mass of AlCl3 = 1.3 g

Volume of water = 500 mL

Molarity of chloride ion (Cl¯) =?

Next, we shall determine the number of mole in 1.3 g of AlCl3. This can be obtained as follow:

Mass of AlCl3 = 1.3 g

Molar mass of AlCl3 = 27 + (35.5×3)

= 27 + 106.5

= 133.5 g/mol

Mole of AlCl3 =?

Mole = mass /molar mass

Mole of AlCl3 = 1.3/133.5

Mole of AlCl3 = 0.0097 mole

Next, we shall convert 500 mL to litres (L). This can be obtained as follow:

1000 mL = 1 L

Therefore,

500 mL = 500 mL × 1 L / 1000 mL

500 mL = 0.5 L

Thus, 500 mL is equivalent to 0.5 L.

Next, we shall determine the molarity of the AlCl3 solution. This can be obtained as follow:

Mole of AlCl3 = 0.0097 mole

Volume of water = 0.5 L

Molarity of AlCl3 =?

Molarity = mole /Volume

Molarity of AlCl3 = 0.0097 / 0.5

Molarity of AlCl3 = 0.0194 M

Next, we shall write the dissociation equation of AlCl3 in solution. This is illustrated below:

AlCl3 (aq) —> Al³⁺ (aq) + 3Cl¯ (aq)

From the balanced equation above,

1 mole of AlCl3 produced 3 moles of Cl¯.

Finally, we shall determine the molarity of the chloride ion Cl¯ in the solution as follow:

From the balanced equation above,

1 mole of AlCl3 produced 3 moles of Cl¯.

Therefore, 0.0194 M AlCl3 will produce = 0.0194 × 3 = 0.0582 M Cl¯.

Thus, the molarity of the chloride ion, Cl¯ in the solution is 0.0582 M.

Answer:

b. The number of electrons

Explanation:

A "neutral atom" has a neutral charge. This means that its charge is equal to zero. In order for the charges to cancel out each other, the atom's positive charge should be equal to the negative charge. These being said, the number of electrons (negatively-charged) is then equal to the number of protons (positively-charged). Those atoms which are not neutral are called "ions." This means that they either have more or less electrons than the protons.

Answer:

THIS IS ONLY WORTH 50 POINTS LIAR LOL

Explanation:

BUT ILL DO IT ANYWAY GIVE ME A SEC

Answer:

Read below

Explanation:

Ionic compounds are compounds composed of ions, charged particles that form when an atom (or group of atoms) gains or loses electrons. (A cation is a positively charged ion; an anion is a negatively charged ion.) Covalent or molecular compounds form when elements share electrons in a covalent bond to form molecules.

Answer:

1.  the bottom layer

2. aqueous HCI

3.  the top layer

4.aqueous NaOH

5. mostly in the diethyl ether layer

Explanation:

Pure dimethylformamide is considerably more polar than hexane hence thee two solutions will form two phases with the pure dimethylformamide as the bottom layer.

If we want to extract aniline from chloroform, HCl must be added in order to give a salt that can be extracted into the aqueous layer.

For a mixture of methylene chloride and diethyl ether, the diethyl ether layer will be found as the top layer since it is considerably less polar than  methylene chloride.

Benzyl alcohol can be extracted from a solution of chloroform by adding NaOH and extracting it into an aqueous layer.

A large partition coefficient for the extraction of naphthalene into diethyl ether from water means that naphthalene will be found mostly in the diethyl ether layer.

Answer:

A. Put six protons in the center of the model, and six electrons around the outside, then add one electron or take away one electron to make an ion.

Explanation:

To make an ion from a given atom, either one electron is added to it or taken away from it.

In an atomic space, protons and neutrons occupy the center of the atom called nucleus.

Electrons moves round the extranuclear space.

This gives an ion.

Answer:

[tex]Ksp=2.00x10^{-8}[/tex]

Explanation:

Hello!

In this case, since the pH of the given metal is 10.15, we can compute the pOH as shown below:

[tex]pOH=14-pH=14-10.15=3.85[/tex]

Now, we compute the concentration of hydroxyl ions in solution:

[tex][OH^-]=10^{-pOH}=10^{-3.95}=1.41x10^{-4}M[/tex]

Now, since this hydroxide has the form MOH, we infer the concentration of OH- equals the concentration of M^+ at equilibrium, assuming the following ionization reaction:

[tex]MOH(s)\rightarrow M^+(aq)+OH^-(aq)[/tex]

Whose equilibrium expression is:

[tex]Ksp=[M^+][OH^-][/tex]

Therefore, the Ksp for the saturated solution turns out:

[tex]Ksp=1.41x10^{-4}*1.41x10^{-4}\\\\Ksp=2.00x10^{-8}[/tex]

Best regards!

Answer:

x + y < 50

Explanation:

Answer:

The correct options are "b" and "c". A further explanation is given below.

Explanation:

The other options offered aren't relevant to the situation described. So the equivalents above are the right ones.

The statements that are correctly explained the saturation temperature of a solution is the ksp value should be determined and the temperature where the solid started to appear from the cooling solution.

It could be measured when there should be sufficient of some other solution that should be incorporated and the same should be absorbed by the solvent. The formulation should be saturated at a similar stage due to this the ksp should be determined. Also, the solid via the solution should continue to appear that based on the freezing below the specific temperature.

Learn more about temperature here: https://brainly.com/question/17427955

Answer:

come to a conclusion

Explanation:

Answer:

pH = 12.11

Explanation:

Hello!

In this case, since the chemical reaction between perchloric acid and lithium hydroxide is:

[tex]HClO_4+LiOH\rightarrow LiClO_4+H_2O[/tex]

Whereas the mole ratio between the acid and base is 1:1, it means they react in the same proportion. In such a way, given the volume and concentration of acid, we compute the moles:

[tex]n_{acid}=0.1000L*0.18mol/L=0.018mol[/tex]

Now, the moles of base that reacted:

[tex]n_{base}=0.075L*0.27mol/L=0.02025mol[/tex]

Thus, since there is an excess of lithium hydroxide of:

[tex]n_{LiOH}^{remaining}=0.02025-0.018=0.00225mol[/tex]

We compute the new concentration considering the total final volume of 175.0 mL:

[tex][LiOH]=\frac{0.00225mol}{0.1750L}=0.013M[/tex]

Now, since there is a strong base remaining in solution, we compute its pOH first:

[tex]pOH=-log([OH^-])=-log(0.013M)=1.89[/tex]

Because LiOH is fully ionized to Li⁺ and OH⁻ ions. Therefore the pH is:

[tex]pH+pOH=14\\\\pH=14-pOH=14-1.89\\\\pH=12.11[/tex]

Best regards!

Answer:

C. Pauli Exclusion Principle

Explanation:

Pauli's exclusion basically suggests that you cannot label two electrons as having the same quantum numbers.

The principle is stated as "no two electrons in an atom can have the same set of four quantum numbers".

Answer:it conduct thermal conductivity because of the heat it holds

Explanation:

When energy is transformed from one form to another, the appliance could be redesigned in such a way that this transfer is minimized.

We know from the principle of transfer of energy that energy can neither be created nor destroyed but is transformed from one form to another. The image is not shown here but I will try to explain what energy transfer is.

Usually, when energy is transformed from one form to another, the appliance could be redesigned in such a way that this transfer is minimized.

Learn more about energy transfer:https://brainly.com/question/18649915?

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Answer:

metamorphic

Explanation:

igneous is when the magma is cooling down, sedimentary is when the are formed by cementing underground. that is why the answer is metamophic

The rock that is most likely to form because of high heat and pressure is known as metamorphic rock. Thus, the correct option for this question is D.

The rock cycle may be defined as a type of cycle that involves the continuous process through which rocks are constructed, altered from one form to another, destroyed, and then formed again by the action of numerous external factors.

If a rock is exposed to great heat and extreme pressure, it undergoes metamorphism. Due to this, the rock does not melt all the way but it changes to a metamorphic rock that may significantly possess new mineral composition and texture.

Metamorphic rocks are rocks that have been altered from their original structure and properties to another due to immense heat and pressure effects.

Therefore, the rock that is most likely to form because of high heat and pressure is known as metamorphic rock. Thus, the correct option for this question is D.

To learn more about Metamorphic rocks, refer to the link:

https://brainly.com/question/398139

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are suppose to make ur own problem if so

I would do for time 2 distance would be 4 and keep adding on 2 example

time: 2

distance:4

time: 4

distance: 8

Answer:

E. Water Freezing

Explanation:

Entropy refers to the degree of disorderliness of a system.  

A. Water Evaporating: There is an increase in entropy, this is because the phase change is from liquid to gas. Gas particles are more disordered than liquid.

B. Dry Ice sublimating: Sublimating refers to a phase change from solid to gas. This is an increase in entropy, this is because the gas particles are more disordered than solid particles

C. Water Boiling: The phase change is from liquid to gaseous state. There is an increase in entropy. Gas particles are more disordered than liquid.

D. Ice melting: The phase change is from solid to liquid state. There is an increase in entropy. Liquid particles are more disordered than that of solid.

E. Water Freezing: The phase change is from liquid to solid state. There is a decrease in entropy. solid particles are less disordered than those of liquid.