help me out real quick

Answer:

electronegativity generally increase as you go from bottom to top group

Answer:

Explanation:

Answer:

you will run 720 meters

Explanation:

because 4 times 60 is 240 and 240 times 3 is 720

1. weight

2. gravity

3. mass, far(distance)

4. weight

5. mass, ?

Answer:

she could be lying about liking you or just want to be friends just ask

Answer:

Pressure Differences occur as result of heating differences

Explanation:

Pressure differences usually occur as a result of heating differences ... most heat is contained near the equator, where most of the heating occurs

Answer:

1.2044 × 10²⁴

Explanation:

1 mol = 6.022 × 10²³

2 mol = 2 × 6.022

Answer:

5 valance electrons

Explanation:

Phosphorus  has 5 valance electrons because it is in the group 15.  Phosphorus  has 3 rings, 2, 8, and 5. The third ring is not full which means those are the valance electrons.

Explanation:

Oxidation Numbers. It is often useful to follow chemical reactions by looking at changes in the oxidation numbers of the atoms in each compound during the reaction. Oxidation numbers also play an important role in the systematic nomenclature of chemical compounds.

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Answer:

2.05g

Explanation:

The weight of butane gas present in the system with the specified temperature and pressure is 2.05 g. We can use ideal gas law here.

Ideal gas law states the relation between temperature, pressure and volume  and mathematically written as below:

PV = nRT

Here, P and V be the pressure and volume and n be the no.of moles and R be the universal  gas constant. T is the absolute temperature in kelvin.

The system have a volume of 3000 mL or 3 L and pressure of 760 torr and temperature of 1000 K. The no. of moles n is the ratio of taken weight to the molar mass. R has the value 62.36 L torr/(K mol)

Apply these values into ideal gas law as given below:

(3 L × 760 torr)  = (w/56.1 g/mol) × 62.36 L torr/(K mol) × 1000 K. From this,

[tex]2280 \textup{ torr L} = \frac{w}{56.1 g/mol} \times 62360 \textup{ L torr/mol}[/tex]

[tex]w = \frac{2280\textup{ torr L}\times 56.1\textup{ g/mol}}{62360 \textup{ L torr/mol}} =2.05 g[/tex]

Therefore, the amount of butane gas for the given system is 2.05 g.

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I wrote, The platinum electrode is the cathode in this reaction. The tin electrode is the anode in this reaction. In the half reactions that occur the nitrate is reduced to nitric oxide(NO) while the tin electrode is oxidized to Sn2+.

Oxidation occurs at the tin half cell(anode) while reduction occurs at the nitrate half cell(cathode).

A galvanic cell refers to a cell that produces electrical energy spontaneously by redox reaction. Oxidation occurs at the anode while reduction occurs at the cathode in a galvanic cell.

The oxidation half equation at the anode occurs as follows;

3Sn(s) → 3Sn^2+(aq) + 6e

The reduction half equation that occurs at the cathode is;

2NO3–(aq) + 8H+(aq) + 6e→  2NO(g) + 4H2O(l)

We can see that electron loss occurs at the cathode while electron gain occurs at the anode as we can see in the equations above.

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Answer:

22.6666666666666666 and so on

Explanation:

68÷3

Answer:

The right answer 22.6666666667

Explanation:

68÷3 the right one

Answer:

control group

Explanation:

Answer:

control book

Explanation:

I found it online and it's very helpful

Answer: Catalyst

Explanation: it speeds it up lol but basically the catalyst helps speed up the chemical reaction by reducing the activation energy or changing the reaction machenism/

Answer:

The answer is A. Catalyst

Answer:

If your students do an exercise and choose the option "send my answers to the teacher", you can check their answers in your mail box. If the students log in with their username and password and do the exercises in their workbooks, you can check their work in your notifications.

Explanation:

may it helpful for you

Answer:

Kinetic

Explanation:

Kinetic energy is the energy of motion.

Answer:

kinetic energy because of its motion

ionic bonds is a type of bond that is ionic I will personally explain

Answer: A type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound

Explanation: ;) ur welcome

Simulation of a reaction is a chemical reaction modeling or demonstration tool, using various software to better understand the molecular structure and the physical and chemical properties of the molecule. Here the actual reaction is N2 + 3H2 -----> 2NH3. In the simulation reactions, the nitrogen and hydrogen molecules in the actual reaction are described by different colored circles or dots and the bonds are produced using a single, double or triple line that touches each molecule and gives an appearance like the reactants and the products' ball and stick model. Example: Molecule of nitrogen as o---triple line---o. A molecule of hydrogen as O———O. Chemical symbols such as N and H are expressed in Actual Chemical Reaction, N2 and H2 and the bonds are represented by single, double or triple lines that do not impact the atoms in the molecule as follows: Nitrogen Molecule: N -triple Bond- N. Hydrogen Molecule: H - H. Hope it helps ya

In the simulation reactions, the nitrogen and hydrogen molecules in the actual  chemical equation are described by different colored circles or dots and the bonds are produced using a single, double or triple line that touches each molecule.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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Answer: To do this, you must divide the mass of each element by its molar mass. Use the periodic table to find the molar mass of each element. Calculate the number of moles of each component element in the compound. A compound is 2.00% H by mass, 32.7% S by mass, and 65.3% O by mass.

Explanation:

Answer:

D

Explanation:

Answer:

Explanation:

Naming ionic compounds building a triangle so that each edge has the same answers facing each other

Answer:

One.

Explanation:

Both sides of the equation need 2 Silver atoms, 1 Nitrogen, 3 Oxygen and 1 Copper to be balanced which is the same as the side of reactants.

Answer:

Electron shells surrounding the nucleus.

Answer:

1. The molecule must possess polar covalent bonds in its structure

2. The molecule must have a NET DIPOLE moment

Explanation:

Polar molecules occur when two atoms do not share electrons equally in a covalent bond. A dipole forms, with part of the molecule carrying a slight positive charge and the other part carrying a slight negative charge. This happens when there is a difference between the electronegativity values of each atom.

Polar molecules have an asymmetrical form and polar covalent connections due to atoms' different electronegativities, resulting in an unequal electron density distribution and a net dipole moment.

To determine the polarity of a molecule, two conditions need to be satisfied:

The molecule must have an asymmetrical shape, and its electron density must be irregular. When the atoms that make up the molecule have different electronegativities, the electrons are drawn to one atom in the molecule more than they are drawn to another. Because of this excess electron density, one side of the molecule will become slightly negative (-), while the other side will become slightly positive (+).

Polar Bonds: In order for the molecule to function properly, it must contain polar covalent bonds. When two atoms with differing electronegativities share electrons in an unequal manner, a polar covalent bond is formed. This results in one atom having a partial positive charge and the other atom having a partial negative charge. When a molecule has multiple polar covalent connections and an asymmetrical shape, the dipole moment of the molecule is said to be polar.

Polarity can be attributed to the asymmetrical bent shape of water (H2O) as well as the covalent interactions between hydrogen and oxygen. Due to the fact that oxygen has a greater electronegative potential than hydrogen, electrons are drawn towards oxygen, which results in oxygen atoms having a partial negative charge whereas hydrogen atoms have a partial positive charge.

Because of the varying electronegativity of the atoms, a polar molecule needs to have an asymmetrical structure and polar covalent bonds in order to exist. As a result of these conditions, polar molecules possess an uneven distribution of their electron density as well as a net dipole moment.

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I admit that I'm unsure, but I believe the answer is D: Sun heating car sitting in a parking lot. It makes sense to me, but I'm blonde. I hope it is correct. I also have that question in my quiz.

Answer:

2 AsCl₃ + 3 H₂S → As₂S₃ + 6 HCl

Explanation:

When we balance a chemical equation, what we are trying to do is to achieve the same number of atoms for each element on both sides of the arrow. On the right of the arrow is where we can find the products, while the reactants are found on the left of the arrow.

We usually balance O and H atoms last.

AsCl₃ + H₂S → As₂S₃ +HCl

reactants

As --- 1

Cl --- 3

H --- 2

S --- 1

products

As --- 2

Cl --- 1

H --- 1

S --- 3

2 AsCl₃ + H₂S → As₂S₃ +HCl

reactants

As --- 2

Cl --- 6

H --- 2

S --- 1

products

As --- 2

Cl --- 1

H --- 1

S --- 3

The number of As atoms is now balanced.

2 AsCl₃ + 3 H₂S → As₂S₃ +HCl

reactants

As --- 2

Cl --- 6

H --- 6

S --- 3

products

As --- 2

Cl --- 1

H --- 1

S --- 3

The number of S atoms is now equal on both sides.

2 AsCl₃ + 3 H₂S → As₂S₃ + 6 HCl

reactants

As --- 2

Cl --- 6

H --- 6

S --- 3

products

As --- 2

Cl --- 6

H --- 6

S --- 3

The equation is now balanced.

Answer:

83.82 g of magnesium ions.

Explanation:

We want to determine the mass of magnesium ions in 155.0 grams of magnesium phosphide (Mg₃P₂).

We can convert from grams of Mg₃P₂ to moles of Mg₃P₂, moles of Mg₃P₂ to moles of Mg, and moles of Mg to grams of Mg.

Find the molecular weight (molar mass) of magnesium phosphide:

[tex]\displaystyle \begin{aligned}\text{MW}_\text{Mg$_3$P$_2$} &= \left(3(24.31)+2(30.97)\right) \text{ g/mol} \\ \\ &= (72.93 + 61.94) \text{ g/mol} \\ \\ &= 134.87 \text{ g/mol}\end{aligned}[/tex]

The molecular weight of magnesium is 24.31 g/mol*.

From the chemical formula, we can see that there are three moles of magnesium for every one mole of magnesium phosphide.

Hence, multiply initial amount with known ratios:

[tex]\displaystyle \begin{aligned} &155.0 \text{ g Mg$_3$P$_2$} \cdot \frac{1 \text{ mol Mg$_3$P$_2$}}{134.87\text{ g/mol}} \cdot \frac{3\text{ mol [Mg$^{2+}$]}}{1 \text{ mol Mg$_3$P$_2$}}\cdot \frac{24.31 \text{ g [Mg$^{2+}$]}}{1 \text{ mol [Mg$^{2+}$]}}\\ \\ & = 83.82 \text{ g [Mg$^{2+}$]}\end{aligned}[/tex]

In conclusion, there are 83.82 grams of magnesium ions in 155.0 grams of magnesium phosphide.

*Because the magnesium ions in magnesium phosphide have two less electrons, its molecular weight will indeed be lower. However, due to the extremely small size of an electron (1/2000th of a proton), the difference in mass is insignificant.

The net ionic equation is; Ca^2+(aq) +  C2O4^2-(aq) -----> CaC2O4(s).

First of all we must write the molecular reaction equation;

CaBr2(aq) + Na2C2O4(aq) -------> CaC2O4(s) + 2NaBr(aq)

Then we write the complete ionic equation as follows;

Ca^2+(aq) + 2Br^-(aq) + 2Na^+(aq) + C2O4^2-(aq) -----> CaC2O4(s) +  2Na^+(aq) +  2Br^-(aq)

We can now write the net ionic equation as follows;

Ca^2+(aq) +  C2O4^2-(aq) -----> CaC2O4(s)

The net ionic equation eliminates the spectator ions and only shows the ions that underwent change in the reaction.

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