Which of the following equations best describes the energy at point
C, assuming energy is conserved?
O A. PEA= KEC
o B. PEA= KEc + PEC
C. PEg= KEC + PEC
O D. PEg = PEC

Answer:

2Mg(s) + O2(g) - >2MgO(s)

Answer:

Cd is oxidized during the discharge of the battery

Explanation:

Based on the reaction:

2 NiOOH + Cd + 2H₂O → 2Ni(OH)₂ + Cd(OH)₂

And knowing Oxygen and hydrogen never change its charge, we must to find oxidation state of Ni and Cd before and after the reaction:

Ni:

In NiOOH: 2 O = -2*2 = -4 + 1H = +1, = -4 + 1 = -3. And as the molecule is neutral, Ni is 3+

In Ni(OH)₂: OH = -1. As there are 2 OH = -2. That means Ni is +2

The Ni is gaining one electron, that means is been reduced

Cd:

Cd before reaction is as pure solid with oxidation state = 0

Cd after the reaction is as Cd(OH)₂: 2 OH = -2. That means Cd is +2

The Cd is loosing 2 electrons, that means is the species that is oxidized.

Answer:

Independent variable - Piece of bread

Dependant variable - Moistness of brownie

Constants- Same size and location of brownie

Hypothesis - IF a piece of bread is added to a brownie container, THEN the brownie will be moister

Control groups- The set of brownie containers she adds no piece of bread to

Experimental group- The set of brownie containers she adds a piece of bread to

Explanation:

The hypothesis in an experiment is a testable explanation to a given problem, which is whether a piece of bread can make brownie moist in this question. Hence, a possible hypothesis will be: IF a piece of bread is added to a brownie container, THEN the brownie will be moister

Independent variable is the variable that the experimenter changes or manipulates in the experiment. In this case, the independent variable is the PIECE OF BREAD added to the brownie.

The dependent variable is the variable that is being measured in an experiment. The dependent variable in this case is the MOISTNESS of the brownie

Constants are variables that the experimenter keeps unchanged for all the groups throughout the experiment. In this case, the constants are SAME SIZE AND LOCATION OF BROWNIE.

Control group is the group that does not receive the experimental treatment or independent variable while the experimental group is the group that receives the experimental treatment. The control group in this experiment is: The set of brownie containers she adds no piece of bread to, while the experimental group is the: The set of brownie containers she adds a piece of bread to

Answer:

B

Explanation:

Answer: B.) the strand that assembles new nucleotides in a continuous fashion

Explanation: edgenuity

Answer:

Explanation:

in the Lewis structure of ICl4- there are total of 36 valence electrons. Since Iodine (I) is below Period 3 on the periodic table it can hold more than 8 electrons. ... Also note that you should put the ICl4- Lewis structure in brackets with as 1- on the outside to show that it is an ion with a negative one charge.

The formal charge present on the iodine atom of ICl₄ is -1.

Formal charge on any atom present in any compound will be calculated by using the below formula:

Formal Charge = (No. of valence electrons in neutral atom) - 1/2 (No. of electrons in covalent bond) - (No. of electrons in lone pair)

In the structure of ICl₄, 4 covalent bonds are present and for iodine atom no. of valence electrons in iodine is 7 and lone pair present on iodine is 2 means 4 electrons of lone pair is present. Structure is shown in the attached image.

On putting these values we get,

Formal charge = 7 - 1/2(8) - 4 = -1

Hence in iodine atom -1 charge is present.

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Answer: Favourable conditions for the formation of ionic bond are low  ionization energy of metal and high electronegativity of non-metal.

Explanation: An ionic bond is defined as the bond formed due to transfer of one or more number of electrons from one atom to another.

Answer: Favourable conditions for the formation of ionic bond​ are low ionization energy of metal and high electronegativity of non-metal. Explanation: An ionic bond is defined as the bond formed due to transfer of one or more number of electrons from one atom to another

hope this helps, sorry if im off

Answer:

6078

Explanation:

Answer:

  about 40

Explanation:

In the attached diagram, there are 5 hydrophobic molecules show, each of which has 9 water molecules shown around it. There are "about 40" water molecules 'stuck' to the hydrophobic molecules.

Explanation:

To solve that deadlock problem, in 1913 Bo kept Rizopho's model of planetary atom and combined with Plang quantum theory, he produced a hydrogen atom model with the following three determinations: - In atoms, The clectron cannot orbit any other, but only rotates with a certain number of orbits. Each "allowed" orbit is equivalent to a certain energy. - When rotating in "allowed" orbits, electrons do not lose energy, meaning they do not emit radiation, but emit radiation only when the electron jumps from an orbit with the high energy level in the orbit corresponding to the the low energy and the household energy of radiation are equal to the difference of the two energy levels. - - When rotating in those "allowed" orbits, the electron has a momentum moment that is an integer times of h / (2π).

Answer:

Yes

Explanation:

: The corrosion of iron indicates a chemical change in the metal. ... Where salt is present, electrochemical corrosion occurs, and the protective oxide film does not form, thus the corrosion (buildup of rust) continues unchecked. Your iron nail will indeed rust more quickly and severely in salt water.

Answer:

see below

Explanation:

A. (1.8 X 10^20) X (2.5 X 10^16)

= 4.5 x 10³⁶

B.(7.9 X 10^9) - (6.0 X 10^8)

= 7.3 x 10⁹

C. (9.2 X 10^19) ÷ (3.0 X 10^7)

= 3.067 x 10¹²

D. (4.2 X 10^9) + (8.0 X 10^18)​

= 8.00000002042 x 10¹⁸

Answer:

see below

Explanation:

A. (1.8 X 10^20) X (2.5 X 10^16)   = 4.5 x 10^36

B.(7.9 X 10^9) - (6.0 X 10^8)  = 7.3 x 10^9

C. (9.2 X 10^19) ÷ (3.0 X 10^7)  = 3.067 x 10^12

D. (4.2 X 10^9) + (8.0 X 10^18)​  = 8.0 x 10^18

Answer:

C+O2=CO2

Explanation:

During combustion the reaction is formed.

Answer:

Al(NO3)3(s)--------> Al^3+(aq) + 3NO3^-(aq)

Explanation:

The equation shown above describes the dissolution of Al(NO3)3 in water using the lowest coefficients.

This occurs when solid Al(NO3)3 is added to water. It dissolves to give rise to ions as shown. This is a property of all ionic substances.

Answer:

Explanation:

The standard system of measurement is what is popularly referred to as SI unit (or international system of units). For example, the SI unit for length is basically in meters (m), which is convertible to millimeter (mm), centimeter (cm) or even kilometer (km).

If there is no standard system of measurement,

1) Scientists will not be able to compare data as every scientist will use a unit that suits him/herself which might make data incomparable as some units might be difficult to convert to other units or there conversion methods might even be debatable.

2) There might be a general lack of understanding of the research work done by a scientist/scientists in the scientific community. This is because the standard system of measurement affords scientists to communicate properly with the same or convertible units and based on 1. above, if scientists use any unit that isn't agreed upon, different/unknown/debatable units might make understanding of research works incomprehensible.

Answer:

by throwing away or recycle

Explanation:

Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

[tex]volume = \frac{mass}{Density} [/tex]

From the question

mass of Iron = 1500 g

Density = 5.5 g/mL

Substitute the values into the above formula and solve

That's

[tex]volume = \frac{1500}{5.5} \\ = 272.727272...[/tex]

We have the final answer as

Hope this helps you

Answer:

21 g/mL

Explanation:

To solve this problem, first look at the density equation, which is D=M/V, which D stands for density, M stands for mass, and V stands for volume. When you substitute in the variables, you get D=17.5/.82, which is equivalent to 21.34. However, since we need to pay attention to the sig fig rules for multiplying, we need to have the same amount of sig figs as the value with the least amount of sig figs, which is the number .82. .82 has two sig figs, so you round down. Your answer will be 21 g/mL.

Answer:

the volume of a set of keys is 6.75ml

Answer:

The model is missing plants, fish and other details found in a real river

The model is much smaller then a real river

Explanation:

Answer:

The model is missing plants, fish and other details found in a real river

The model is much smaller then a real river

Explanation:

Answer:

Antoine Laurent Lavoisier

Answer:

JUST B

Explanation:

Answer:

For comprehension, the question is written properly with options attached below:

plasma that has particles that never collide frequently enough to exchange kinetic energy and never reach a temperature equal to the surroundings is categorized as:

A. a thermal plasma.

B. ionized plasma.

C. low density plasma

D. nonthermal plasma.

The correct answer to the question above is "Option D (nonthermal plasma.)"

Explanation:

Plasma, for example radiant sun are state of matter made up of atoms where the ions move freely, there are composed of photons and free electrons but the positive and negative ions are equal creating a swirling gas of positive ions and negative electron and they are also good conductors of electricity as their charged particles move.

Unlike thermal plasmas that ensure their temperature is equal to their surroundings, non-thermal plasma, is not in equilibrium with its surrounding., in other words, non-thermal plasma never reaches temperature that is equal to their surroundings. They can be formed by electrifying electromagnetic waves.

A plasma with particles that never collide frequently to exchange kinetic energy is : ( D ) Nonthermal plasma

A plasma is a body of matter made up photons and  freely moving ions contained its atoms the free moving ions are both positive and negative ions which are equal to each other.

A Thermal plasma collide frequently enough to reach a temperature that is equal to the temperature of the surroundings while Nonthermal plasma does not collide enough and does not reach an equilibrium temperature with its surrounding.

Hence we can conclude that A plasma with particles that never collide to exchange kinetic energy is A Nonthermal plasma.

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Answer:

mineral

Explanation:

Because every natural thing has mineral

Answer: is C

Explanation:

Both the atomic mass and the atomic number increase from left to right

Answer:

The answer is number 3

Explanation: