How does a galvanic cell work? A. A voltage applied across two electrodes causes electrons to flow. B. A salt bridge connecting two electrodes generates electrons. O C. A redox reaction at two electrodes causes electrons to flow. D. Two electrolyte solutions react to cause electrons to flow.​

Explanation:

On the whole, the metals burn in oxygen to form a simple metal oxide. Beryllium is reluctant to burn unless it is in the form of dust or powder. Beryllium has a very strong (but very thin) layer of beryllium oxide on its surface, and this prevents any new oxygen getting at the underlying beryllium to react with it

Answer:

Molarity = 0.65 M

Explanation:

Given data:

Mass of CH₄N₂O  = 250 g

Volume of solution = 6.0 L

Molarity of solution = ?

Solution:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles of solute / L of solution

Number of moles of solute:

Number of moles = mass/molar mass

Number of moles = 250 g/ 64.08 g/mol

Number of moles = 3.9 mol

by putting values,

Molarity = 3.9 mol / 6.0 L

Molarity = 0.65 M

A. The reaction would remain in equilibrium

Given

Reaction

H₂ + I₂ ⇔ 2HI

Required

the effect of pressure changes

Solution

In the equilibrium system :

Reaction = - action  

⇒shift the reaction to the right or left.  

The pressure usually affects the gas equilibrium system(only count the number of moles of gases)

The addition of pressure, the reaction will shift towards a smaller reaction coefficient  ((the fewest moles of gas  )

Reaction

H₂ + I₂ ⇔ 2HI

The reactant side of the equation has 2 moles of a gas(1 mole H₂ and 1 mole  I₂) ; the product side has 2 moles HI

So the total number of moles from both sides is the same(2 moles) so that the change in volume (pressure) does not change the direction of equilibrium⇒No shift will occur

Answer:

A. The reaction would remain in equilibrium

Explanation:

The Theoretical yield is the highest amount of product that could be formed from the allocated amounts of reactants.

The Theoretical yield is the greatest amount of product that could be formed from the given quantities of reactants.

The Actual yield is the quantity of product that is formed when the response is carried out in the laboratory.

The Percent yield is the ratio of the authentic yield to the theoretical yield, described as a percentage.

Percentage Yield Formula: When the product that we are obtained after a chemical reaction is known as the yield. We can estimate this accepted yield in moles or grams.

It is the ‘authentic yield’ that we acquire after the completion of a chemical reaction. Separated from this, established on our estimation, we calculate the anticipated yield of a reaction comprehended as the ‘theoretical yield.’

Find more information about Theoretical yield here:

https://brainly.com/question/11683739

Answer:

A Energy for cell processes is released

Answer:

study of chemical used in industries

Answer:

The anode made of the impure copper

The cathode made of pure copper

The electrolyte of copper (II) sulfate CuSO₄ solution

The silver impurities at the anode due to their high tendency of accepting electrons and being a stronger reducing agent than either copper or zinc will remain relatively in place and relatively stable and will not actively take part in the oxidation reaction taking place at the anode

The zinc impurities will be the first element of the three metals to give up electrons and go into the solution as zinc ions due to their high tendency to loan out two electrons and become oxidized into Zn²⁺ ions

The drawing of the electrolytic cell created with Microsoft Visio is attached

Explanation:

Answer:

yes it did.

Explanation:

the product must have produced a smell therefore it created a gas. this means it was a chemical reaction

Answer:

A. Wisconsin

Explanation:

In the graph, Wisconsin has the highest speed limit.

Answer:

compound

Explanation:

Answer:

compound

Explanation:

A molecule is formed when two or more atoms join together chemically. If atoms combine that are of two or more different elements, we call that a compound. All compounds are molecules, but not all molecules are compounds. When two hydrogen atoms combine with one oxygen atom, it becomes the compound water

Answer:

One atom lf helium has a mass of 4 u

Know that 1 u =1.66. 10-24g

Answer:

The correct option is;

A. It would favor the forward reaction

Explanation:

Le C_h_a_t_e_l_i_e_r_'s principle states that for a system in dynamic equilibrium a change in the volume, pressure, concentration, or temperature will cause a predictable shift in the reaction to bring about a shift in the equilibrium position which counteracts the change and bring about the establishment of a new equilibrium

Therefore, in the reaction, H₂O + CO₂ → H₂CO₃, we have;

An increase in the amount of the CO₂ concentration in the blood, increases the quantity of the reactants more than the quantity present at equilibrium, therefore, the number of reaction between the H₂O and the CO₂ increases resulting in the formation of more H₂CO₃, therefore, favoring the forward reaction.

Answer:

A. It would favor the forward reaction.

Explanation:

A.P.E.X

Answer:

E = 2.85×10⁻¹⁹ J

Explanation:

Given data:

Wavelength of light = 700 nm

Frequency of light = 4.3×10¹⁴ s⁻¹

What is the energy of light = ?

Solution:

Formula:

E = h × f

h = plancks constant = 6.63×10⁻³⁴ Js

by putting values,

E =  6.63×10⁻³⁴ Js × 4.3×10¹⁴ s⁻¹

E = 28.5×10⁻²⁰ J

E = 2.85×10⁻¹⁹ J

Answer:

Since the noble gases are unreactive or inert, they are safe to use. Helium is used to fill balloons and airships, because it is much lighter that air and it will not catch fire. Neon is used in advertising signs. It will give red glow, but the color can be changes by mixing it with other gases.

Explanation:

Answer:

Water is a compound. It contains more than one element: hydrogen and oxygen atoms are joined together;

Answer:

An amphoteric oxide is an oxide that can act as either an acid or base in a reaction to produce a salt and water. Amphoterism depends on the oxidation states available to a chemical species. Because metals have multiple oxidation states, they form amphoteric oxides and hydroxides.Many metals (such as zinc, tin, lead, aluminium, and beryllium) form amphoteric oxides or hydroxides. Amphoterism depends on the oxidation states of the oxide. Al2O3 is an example of an amphoteric oxide. Amphoteric oxides also include Lead (II) oxide, and zinc (II) oxide, among many others.[2]

Explanation:

hope this will help you

Answer:

Amphoteric oxides react with both acids and alkalis to form salt and water. Examples of amphoteric oxides are zinc oxide and aluminium oxide.

Explanation:

hope it helps....

Answer:

A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.Example- Snowflakes, diamonds, and table salt.

Answer:

Examples of everyday materials you encounter as crystals are table salt (sodium chloride or halite crystals), sugar (sucrose), and snowflakes. Many gemstones are crystals, including quartz and diamond. There are also many materials that resemble crystals but are actually polycrystals

Explanation:

a crystal is a piece of a homogeneous solid substance having a natural geometrically regular form with symmetrically arranged plane faces.

Answer:

c?

Explanation:

sorry, im not too great with this lol. i probably have it wrong, so i wouldnt really trust my answer lol.

Answer:

4cro3=2cr2o3+3o2

Explanation:

on left hand side there is 4cr and 12o where as now on wright hand side we have 4cro6+6o which makes 4cr and 12o which is equal to the left hand side.

Answer:

4CrO3====> 2 Cr2O3 + 3O2

Explanation:

Before dealing with the Cr, I think you might want to deal to work with the oxygen in Cr2O3

You might want to turn that into an even number. You could put a 2 in front of the Cr2O3, but looking ahead, I can see that will give you a fractional amount for the O2. So I'll use a 4

CrO3 ===> 4 Cr2O3      +     O2

That means you have 8 Cr s on the right. Balance that on the left

8CrO3  =====> 4 Cr2O3 + O2

You've balanced The Cr s. So now lets look at the oxygens. There are 8*3 oxygens on the left hand side. The right has 12 + 2. Don't touch the Cr2O3. You are done with them.

You need 12 more oxygens on the right. You have 2. So multiply the Oxygens by 6

8CrO3 ===> 4 Cr2O3 + 6 O2     There's a factor of 2 common. Divide by 2

4CrO3====> 2 Cr2O3 + 3O2

Answer:

Explanation:

Ok so the first one would be Electrical energy and Radiated energy

Then the 2 question it would be not electrical but the other 3 for the 3 question it would be it would be Electrical and the radiated energy

And for the last one it would be the last 3

The three ways that an atom can fulfill this goal is to give away electrons, take an electron, and share electrons.

When an atom reacts ,its goal is to become more stable by filling its outer electron shell by gaining, loosing or sharing electrons.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

Learn more about atom,here:

https://brainly.com/question/13654549

#SPJ2

Answer:

The number of drops depends upon the size of the drops. So, basically, 1 ml has a drops of 20

so 2000 mo will have a 40k drops

Answer:

groups and periods

Explanation:

Answer:

the first two elements of array are checked and the largest of these two elements are placed in arr[0]

the first and third elements are checked and largest of these two elements is placed in arr[0] .

this process continues until the first and last elements are checked.

Explanation:

Then you would find the largest Elements

Answer:

Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.

Answer:

more than 30 seconds

Explanation:

theres some extra

question : To study the actions of the enzyme catalase on hydrogen peroxide, students performed the following experiment. Catalase was extracted from potatoes and stored on ice. The following hydrogen peroxide solutions were made: 1%, 5%, 10%, 15%. Filter paper disks were soaked in the catalase then dropped into each of the solutions. Enzyme activity was measured by the time it took for the disks to float from the bubbles produced. Here is the data:

Which of the following best describes why the disks float faster to the surface in more concentrated solutions?

asnwer

the higher substrate concentrations in the more concentrated solutions speeded up the reaction

yw!

Answer:

the dog barked is the answer

Answer:

Atoms of elements at the top of a group on the periodic table are smaller than the atoms of elements at the bottom of the group. ... The valence electrons of the larger atoms are farther from the nucleus and are easier to remove, so the metals near the bottom are more reactive than those at the top.

Answer:

fossil

Explanation:

the dead organism is called a fossil i think

Answer:

A fossil is the remains of a once-living organism found in layers of rocks, ice, or amber

Answer:

Calories or Protein  don't judge me if i'm wrong on both -__-

Explanation: