Y’all I need help I will give brainly!!! (Use the crisscross method to find the chemical formula for the ionic compound formed by magnesium “Mg” and phosphorus “p”)
A) Mg2P
B) Mg3P2
C) MgP
D) Mg2P3

To solve this we must be knowing each and every concept related to speed. Therefore, 5x10⁵s it take light to travel from the Earth to the Sun.

Speed may be defined as the distance traveled by an item in the amount of time it requires to travel that distance. In other words, it measures how rapidly an item travels but does not provide direction. The term "velocity" refers to the combination of direction and speed.

The average speed is the total distance traveled by the item in a particular time frame. A scalar quantity is average speed. The magnitude of a scalar quantity indicates that it has no direction.

Mathematically,  

speed of light=2.998 x 10⁵m/s.

Time = (1.496x10⁸ km x 1000m/km) / (2.998 x  10⁵ m/s)

       =5x10⁵s

Therefore, 5x10⁵s it take light to travel from the Earth to the Sun.

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Answer:

86% - 14% = 72%

Explanation:

Mole (mol): the amount of material counting 6.02214 × 1023 particles. The value of the mole is equal to the number of atoms in exactly 12 grams of pure ... A silver ring contains 1.1 x 1022 silver atoms. How many moles of silver are in ... Answers. 1. (a) 2.26 × 10. 24 silver atoms; (b) 1.42 × 10. 24 xenon atoms (c) 3.07 × 10.

Explanation:

Answer:

Ammonia

Explanation:

Answer:

nitrogen trihydride

Explanation: correct on edge

Answer:

0.71 g/mL

The liquid is diethylamine

Explanation:

Mass of the liquid = 1.23 kg of 1.23 * 10^3 g

Volume of the liquid = 1737.cm3

Let us remember that density is obtained as;

Density= mass/volume

Density= 1.23 * 10^3 g/1737cm^3

Density= 0.71 g/cm^3

Since we know that 1 mL=1 cm3 . So, 1 g/mL=1 g/cm3

So we can also write;

Density= 0.71 g/mL

The liquid is diethylamine

Answer: 63

Explanation: (3.78/6.022)*100

Answer:

Neurons are fundamental units of the brain and nervous system.the cells are responsible for receiving sensory input from the external world for sending motor commands to our muscles and for transforming and relaying electrical signals every step in between.

Answer:

Which atom is oxidized in the reaction of benzhydrol with bleach?

Explanation:

n this experiment, students will perform a simple oxidation reaction of a secondary

alcohol. Recall that Oxidation Is a Loss of electrons while Reduction Is a Gain of electrons (OIL

RIG). In order to apply this mnemonic, you must know the oxidation states of each atom within

the compound, with particular interest on carbon. Carbon can carry oxidation states ranging

from -4 to +4. A few examples are shown in Figure 1 below. It is also common for carbon to

carry an oxidation state of -3, -1, +1, and +3.

Figure 1. Examples of carbon’s oxidation levels.

You may have noticed that all of the compounds in Figure 1 are neutral and carbon has

zero formal charge in each example. The concept of oxidation state and formal charge are

similar with one important difference in the calculation. Both are calculated by taking the

difference between the valence electrons (from the periodic table) and the number of electrons

belonging to that atom within the molecule. For a given atom, the valence electrons will never

change but the electrons ‘belonging’ the atom in the molecule will vary depending on number of

lone pairs and attachments to more or less electronegative atoms. The important difference in

the calculation of oxidation states and formal charge is based on the following assignment of

bonding electrons (Figure 2). This is how the highlighted carbon in ethanol can have an

oxidation state of -1 but a formal charge of zero.

- Oxidation states assign bonding electrons to the more electronegative atom in a bond,

except when the two atoms are the same and the bonding electrons are split equally.

Answer:

so the reaction would probably would be a chemical reaction

"When benzophenone reduces to diphenylmethanol, leftover products include the CH2OH and NaBH3 species. The energetic CH2OH and NaBH3 quickly bond to give (CH2OH)H3B-Na+. This complex is the main second product of benzophenone reduction."

Reactant Ratios

"In life, four benzophenone molecules react with each BH4 complex. Since four benzophenone molecules each attract a hydrogen atom from the “BH4” hydrogen donor, four “CH2OH”s bond with each boron (B) atom. Realistically, the secondary product is (CH2OH)4B-Na+ and four diphenylmethanol molecules. Focusing on one benzophenone molecule at a time is helpful for explaining and understanding reaction steps."

i hope it helps

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Answer:

the correct unit for molar mass is g/mol

Answer:

The molar mass of a compound tells you the mass of 1 mole of that one substance. Tt tells you the number of grams per mole of a compound. The units for molar mass are, therefore, grams/mole.

Explanation:

BOOM BIG BRAIN

Answer:

Scientists hypothesized that WNS, caused by the fungus Pseudogymnoascus destructans, makes bats die by increasing the amount of energy they use during winter hibernation. Bats must carefully ration their energy supply during this time to survive without eating until spring

Explanation:

Answer:

20 kJ

Explanation:

The products are C + D which is on the right side of the diagram. And it says it has 20 kJ of energy.

Answer:

.0466 L

Explanation:

To start off, use dimensional analysis to convert everything to standard PV=nRT units.

[tex]\frac{39.0}{1}[/tex] x [tex]\frac{1}{1000}[/tex] = .039 L

[tex]\frac{802}{1}[/tex] x [tex]\frac{1}{760}[/tex] = 1.055 atm

17 +273 = 290

...and so on.

Solve for n for the starting pressure, volume and temp. You'll need it for the final equation.

n= PV/RT [tex]\frac{1.055 *.039}{.0821 * 290}[/tex]= .0017 number of moles

Solve for volume of the end point.

V= nRT/P [tex]\frac{.0017*.0821*280}{.838}[/tex] = .0466 L of helium, or 46.6ml Less pressure means it will take up more space.

Answer:

3.3765 Mol O2

Explanation:

There is no work for this problem

Answer:anions have a negative charge and cations have a positive charge therefor they can form ionic bonds

Explanation:

Answer:

Carbon dioxide and water are turned into sugar and oxygen

Answer:

28956J

Explanation:

Specific heat capacity is equal to mass × heat capacity × temperature change

Shc = mCtheta

= 10 × 114 ×25.4

= 28956J

Answer:

Purple flowers

Explanation:

Usually the dominant allele is a capital letter.

From the question, purple flowers are dominant to white flowers while white are recessive.

PP = Purple

pp = White

Answer:

Mostly purple flowers itself

Answer:

Explanation:

Diamond has lesser density than platinum . So , if we take equal mass of both , the volume of mass of platinum will be far less .

The density of both diamond and platinum are  more than water so both of them will be drowned in water completely . They will not float . On being drowned , platinum will displace lesser volume of water because of its less volume . So volume change in case of platinum mass will be far less . The volume change for diamond will be more because of its bigger size.

Answer:

76.6% is percent yield of P₄

Explanation:

Percent yield is defined as 100 times the ratio of actual yield and theoretical yield. To solve this quesiton we need to find the theoretical yield of the reaction. Using:

2Ca₃(PO₄)₂(s) + 6SiO₂(s) → 6CaSiO₃(l) + P₄O₁₀(g)

P₄O₁₀(g) + 10C(s) → P₄(g) + 10CO(g)

We need to find the moles of Ca₃(PO₄)₂ and SiO₂ to find limiting reactant. With limiting reactant we can find moles of P₄O₁₀ = Moles of P₄. We must convert the moles of P₄ to mass using Molar mass (P₄ = 123.895g/mol):

Moles Ca₃(PO₄)₂ -Molar mass: 310.1767g/mol-

293.5g * (1mol / 310.1767g) = 0.9462moles

Moles SiO₂ -Molar mass: 60.08g/mol-:

378.5g * (1mol / 60.08g) = 6.30 moles

For a complete reaction of 6.30 moles of SiO₂ there are required:

6.30 moles SiO₂ * (2 moles Ca₃(PO₄)₂ / 6 moles SiO₂) =

2.10 moles Ca₃(PO₄)₂. As there are just 0.9462 moles, Ca₃(PO₄)₂ is limiting reactant

Moles P₄O₁₀ = Moles P₄:

0.9462moles Ca₃(PO₄)₂ * (1mol P₄O₁₀ / 2 mol Ca₃(PO₄)₂) = 0.4731 moles P₄O₁₀ = Moles P₄.

The mass is:

0.4731 moles P₄ * (123.895g / 1mol) = 58.6g = Theoretical yield.

Percent yield is:

44.9g / 58.6g * 100 =

Answer:

it is magnesium hope it helps

Answer:

true

Explanation:

it's true I have the same course

Answer:

73.48 g

Explanation:

The reaction that takes place is:

We convert the given reactant masses to moles, using their respective molar masses:

0.83 moles of ethane would react completely with (0.83*7/2) 2.9 moles of O₂. There are more O₂ moles than that, so O₂ is the reactant in excess and ethane is the limiting reactant.

We calculate the produced moles of CO₂ using the moles of the limiting reactant:

Finally we convert CO₂ moles to grams, using its molar mass:

Answer: e. As the pressure increases, there are more collisions of helium atoms with the container wall.

Explanation:

We are given the information that helium gas is pumped into a rigid container at a constant temperature.

Due to this reason, there was a rise in the pressure of helium in the container. We should note that as the pressure rises, there are more collisions of helium atoms with the container wall.

The increase in the pressure of He atoms results in the increased collision of atoms with the wall. Thus, option E is correct.

The helium in the container is assumed to be an ideal gas. The ideal gas reaction is given as:

[tex]PV=nRT[/tex]

Where,

The ideal gas equation depicts that the gas is contained in a closed container. Thus, the moles, n of gas are constant. The pressure is pumped at a constant temperature, thereby T is also constant.

The R is a constant in the ideal gas equation. The increase in the pressure of the container results in the increased kinetic energy of the helium atoms.

The increase in the collisions is observed for the molecules with the container wall.

Thus, with the increase in pressure, the collisions in the atoms increase. Hence, option E is correct.

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Answer:

[tex]8.314\ \text{m}^3\text{Pa/mol K}[/tex]

Explanation:

Let us find the unit of the gas constant R from the ideal gas equation. We substitute the units of the quantities rearrange them and get the units of the gas constant.

P = Pressure = Pa

V = Volume = [tex]\text{m}^3[/tex]

n = Moles = mol

T = Temperature = K

[tex]PV=nRT\\\Rightarrow R=\dfrac{PV}{nT}\\\Rightarrow R=\dfrac{\text{Pa m}^3}{\text{mol K}}[/tex]

Here, [tex]\text{Pa}[/tex] is used so the gas constant value that must be used is [tex]8.314\ \text{m}^3\text{Pa/mol K}[/tex].

Answer:

False. Energy can only be released when bonds are broken. consider the result when atoms are tron appart.

The factor that would help to determine the distance of the ship from the fish would be  The amount of time it takes the sound waves to travel to the fish and back to the boat​.

This is the term that is used to refer to the total distance that would be traveled by a wave in a given cycle. The distance is usually calculated by the use of lambda. The use of Sonar would have to be determinant on the sound that is being heard.

We would have to check the way that the sound would have to come from the ship and then the way that it would have to be go back to the given boat that is used to report and find the school of fisn.

Hence we would say that The factor that would help to determine the distance of the ship from the fish would be  The amount of time it takes the sound waves to travel to the fish and back to the boat​.

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Answer:

b. 0.22 L

Explanation:

Step 1: Write the balanced equation

4 HNO₃(l) ⇒ 4 NO₂(g) + 2 H₂O(l) + O₂(g)

Step 2: Calculate the moles corresponding to 2.5 g of HNO₃

The molar mass of HNO₃ is 63.01 g/mol.

2.5 g × 1 mol/63.01 g = 0.040 mol

Step 3: Calculate the moles of O₂ produced from 0.040 moles of HNO₃

The molar ratio of HNO₃ to O₂ is 4:1. The moles of O₂ produced are 1/4 × 0.040 mol = 0.010 mol.

Step 4: Calculate the volume corresponding to 0.010 moles of O₂

Assuming the reaction takes place at standard temperature and pressure, the volume of 1 mole of O₂ is 22.4 L.

0.010 mol × 22.4L/1 mol = 0.22 L

Answer:

corrosion resistance.

Explanation:

In summary, stainless steel does not rust because it is sufficiently reactive to protect itself from further attack by forming a passive corrosion product layer. (Other important metals such as titanium and aluminum also rely on passive film formation for their corrosion resistance.)

Answer:

1[tex]s^{2}[/tex]2[tex]s^{2}[/tex]2[tex]p^{6}[/tex]3[tex]s^{2}[/tex]3[tex]p^{6}[/tex]3[tex]d^{10}[/tex]4[tex]s^{2}[/tex]4[tex]p^{6}[/tex] (alternatively 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6)

Explanation:

The correct configuration for bromide ([tex]Br^{-}[/tex]) is:

1[tex]s^{2}[/tex]2[tex]s^{2}[/tex]2[tex]p^{6}[/tex]3[tex]s^{2}[/tex]3[tex]p^{6}[/tex]3[tex]d^{10}[/tex]4[tex]s^{2}[/tex]4[tex]p^{6}[/tex] (it has one more electron in 4p orbital than bromine)

You can also write it as [Ar] [tex]4s^{2}[/tex] [tex]3d^{10}[/tex] [tex]4p^{6}[/tex], since noble gases are very stable

First can't be correct because there is nothing in 3p orbital and 4p has only 5 electrons here

1s² 2s2 2p6 3s2 3p 4s2 3d10 4p5

Second can't be correct because there is nothing in 2p and 4p orbitales 1s2 2s² 2p 3s2 3p6 4s2 3d10 4p

Third can't be correct because there is nothing in 3p orbital and 4p has only 5 electrons here

1s 2s2 2p6 3s2 3p' 4s2 3d10 4p5

Fourth can't be correct because there is nothing in 2p and 3d orbitales, and 4p has only 5 electrons here

1s2 2s2 2p 3s2 3p6 4s2 3dº 4p5