What is the voltage of an electrolytic cell with zinc and aluminum electrodes?
O A. -2.44 V
B. -0.92 V
C. 2.44 V
O D. 0.92 V

Answer:

Some of the energy released in respiration is used to make larger molecules from smaller ones, to enable muscles to contract and to keep temperature steady. Some of the energy released in respiration in plants is used to make amino acids and proteins. c Food provides the amino acids needed to make body proteins.

Explanation:

Answer:

A. See-Saw

Explanation:

A see-saw is not an inclined plane but it is a lever.

A screw, ramp and a slide are all inclined planes

Simple machines help to make doing work easier. They simply help to amplify effort.

There are different types of simple machines;

An inclined plane is a simple machine made up of a plane fixed at one end and then tilted at the other.

Answer:

float ...(i think)

Explanation:

Answer:

B 1 and 3

this might be able to help you

Answer:

i think option b

C 1 and 3

Explanation:

Simple distillation is a method for separating the solvent from a solution. For example, water can be separated from salt solution by simple distillation. This method works because water has a much lower boiling point than salt. When the solution is heated, the water evaporates.

Crystals grow because salt molecules in the solution meet up and interlock. As they do so, they fit together like puzzle pieces, arranging themselves in a lattice structure, thus creating a crystal nucleus. ... it crystallizes.

Answer:

Electronic configuration consist

on the basis of sub shell

Answer:

saber tooth cats

Explanation:

Answer:

You'll find someone. There's a someone for everyone.

Explanation:

And I know how you feel.

No, unless you're doing some sort of course where they demand that you do. It's useful to remember the general features of the periodic table (what each block is, where they are in relation to each other, roughly where the most common elements are), but memorizing the entire thing would simply be a mnemonic exercise

Hope this helped

Answer:

i used a vent to vented

Explanation:

Answer:

  (A) is the answer

Explanation:

(A) heat a saturated sugar water solution, dissolve more sugar, then let the solution cool

Answer:

the answer is a

Explanation:

im on edg rn

Answer:

Cl has 7 dots

if its Cl2; Cl-Cl it will contain 14 dots

Explanation:

The electron-dot formula of the chlorine molecule Cl₂is shown in the attached diagram below.

A lewis electron dot structure is used to represent the number of bonds, the bonding atoms, and the lone pairs left in the atoms in the molecule.

Lines are shown between atoms that are bonded to one another and excess electrons or lone pairs are represented as dot pairs and are placed next to the atoms.

As the valence electrons of each chlorine atom are equal to seven from the electronic configuration of the chlorine atom.

First, the total number of valence electrons in a chlorine molecule is 7 + 7 = 14.

As each chlorine atom needs only one electron to complete its octet. As the octet completes, the rest of the electrons are assigned as the lone pairs of atoms. Therefore, each chlorine atom has three lone pairs of electrons on it.

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Answer:

Moles of nitrogen monoxide gas produced from 8.0 L of oxygen gas = 6.4 L of nitrogen monoxide gas

Explanation:

Equation of reaction:  4NH₃(g) + 5O₂(g) --> 4NO(g) + 6H₂O(g)

From the equation of reaction, 5 moles of oxygen gas produces 4 moles of nitrogen monoxide gas

1 mole of a gas at STP occupies a volume of 22.4 L

5 moles of oxygen gas occupies a volume of 5 * 22.4 L = 112 L

4 moles of nitrogen monoxide as occupies a volume of 4 * 22.4 L = 89.6 L

Therefore, 89.6 L of nitrogen monoxide gas are produced from 112.0 L of oxygen

Moles of nitrogen monoxide gas produced from 8.0 L of oxygen gas = 8.0 * (89.6/112

Moles of nitrogen monoxide gas produced from 8.0 L of oxygen gas = 6.4 L of nitrogen monoxide gas

Answer:

The answer would be "True"  

Answer:

Physical matter is made up of atoms and molecules. An atom is the sub-component of a molecule, or the smallest unit of matter. It is the smallest part an element can divide into. A molecule is made up of atoms that are bound by ionic, covalent or metallic bond.

Answer:

Molecules in solids are tightly packed because the atoms are freezed together. Molecules in liquids are loosely packed because atoms are broken down and can move anywhere. Molecules in gases are free; the atoms can move or spread anywhere.

Solids do not move; hence no speed.

Liquids move and slide past past each other.

Gases move freely at high speeds

my texts aren't going thro. we can talk in snap chat which is a social site.

Answer:

You are correct however there is also potential energy because the energy is released over a period of time.

Hope this helps!

Answer:

9.28moles

Explanation:

Given parameters:

volume  = 11.1L

pressure  = 204atm

temperature  = 24°C = 24 + 273  = 297K

Unknown:

Number of moles of air in the cylinder  = ?

Solution:

To solve this problem, we apply the ideal gas equation;

         PV = nRT

P is the pressure

V is the volume

n is the number of moles

R is the gas constant  = 0.082atmdm³mol⁻¹K⁻¹

T is the temperature

Now insert the parameters and find n;

     204 x 11.1  = n x 0.082 x 297

    226.4  = 24.4n

        n  = 9.28moles

The number of moles of air in the cylinder is 92.98 moles

From the following parameters given, we are to determine the number of moles of air in the cylinder.

Given that:

The number of moles of air can be determined by using the relation for the ideal gas equation which can be expressed as:

where

Making (n) the subject of the formula:

[tex]\mathbf{n = \dfrac{PV}{RT}}[/tex]

[tex]\mathbf{n = \dfrac{204 \ atm \times 11.1 L}{0.082 \ L .atm/mol .K \times 297 \ K}}[/tex]

n = 92.98 moles

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To solve this we must know the concept behind the phenomenon of elevation in boiling point when a non volatile solute is added to any solvent. Therefore, boiling point in °C of a 0.527 m aqueous solution of LiBr is  100.54 °C.

Whenever a non volatile solute is added to a solvent then the boiling point of solvent increases.

Mathematically,

ΔT= Kb× molality

The complete balanced equation can be written as

LiBr → Li⁺ + Br⁻ [two ions]

substituting all the given values in the above mathematical expression, we get

(0.527 m LiBr) x (2 mol ions / 1 mol LiBr) = 1.054 m ions

(0.512 °C/m) x (1.054 m) = 0.540 °C change

100.00°C + 0.540 °C = 100.54 °C

Therefore, boiling point in °C of a 0.527 m aqueous solution of LiBr is  100.54 °C.

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Answer:

Explanation:

The density of a substance can be found by using the formula

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

volume = final volume of water - initial volume of water

volume = 13.91 - 12 = 1.91 mL

We have

[tex]density = \frac{15}{1.91} \\ = 7.853403141...[/tex]

We have the final answer as

Hope this helps you

Answer:

Hello, Im Mack :)

Here is the Correct Solution for your question:

Answer is 7.85 g/mL

Explanation:

The density of a substance can be found by using the formula

-volume = final volume of water - initial volume of water

-volume = 13.91 - 12 = 1.91 mL

-Final Answer is: 7.85 g/mL

Hope this helped you out :)

Comment if you need further help, and I'll reply asap.

Have a great day my friend\ and best of luck to your studies :)

Answer:

applying for a license

Answer:

Applying for a license

Explanation:

This is because you have to have observations,hypothesis and a scientific equation when using The Scientific Method.

How to Inbox anyone here..

i am a new user.

Answer:

Just like a solid, the density of a liquid equals the mass of the liquid divided by its volume; D = m/v. The density of water is 1 gram per cubic centimeter. The density of a substance is the same regardless of the size of the sample. Summary. Students measure the volume and mass of water to determine its density.

Explanation:

Answer:

The amount of solar radiation emitted by the Sun varies during different Earth seasons

Explanation:

Answer:Zirconium is a chemical element with the symbol Zr and atomic number 40. The name zirconium is taken from the name of the mineral zircon, the most important source of zirconium. It is a lustrous, grey-white, strong transition metal that closely resembles hafnium and, to a lesser extent, titanium. Zirconium is mainly used as a refractory and opacifier, altho…