how many atoms are there in 1.25 moles of Zn?

Answers

Answer 1

Answer:

7.53×10^23

Explanation:

i dont know how

Answer 2

Answer:

There are 6.25×10²³ atoms in 1.25 moles of Zn


Related Questions

Drag the item from the item bank to its corresponding match.
These are the elements or compounds that enter into a chemical reaction.
drag an
These are the substance(s) formed in a chemical reaction.
drag an
These are the reactants in the chemical equation C6H1206 +602 --> 6CO2 + 6H20
drag an
These are the reactants in the chemical equation 6 CO2 + 6H2O --> C6H1206 + 6 02
drag and
These are the reactants in the chemical equation 2 H2 + 02 --> 2 H2O
These are the reactants in the chemical equation 2 H2O --> 2 H2 + O2

Answers

Answer:

These are the elements or compounds that enter into a chemical reaction: Reactants

These are the substance(s) formed in a chemical reaction: Products

These are the reactants in the chemical equation C6H1206 +602 --> 6CO2 + 6H20: C6H1206 and 602

These are the reactants in the chemical equation 6 CO2 + 6H2O --> C6H1206 + 6 02: 6 CO2 + 6H2O

These are the reactants in the chemical equation 2 H2 + 02 --> 2 H2O: 2H2 and O2

These are the reactants in the chemical equation 2 H2O --> 2 H2 + O2: 2H2O

Methane (CH4) is a gas that is found in small quantities in Earth’s atmosphere. Which type of bonds does methane have, and why does one carbon atom bond with four hydrogen atoms? In three to five sentences, explain your answer in terms of valence electrons and electronegativity.

Answers

For example, in methane (CH 4​start subscript, 4, end subscript), carbon forms covalent bonds with four hydrogen atoms. Each bond corresponds to a pair of shared electrons (one from carbon and one from hydrogen), giving carbon the eight electrons it needs for a full outer shell.

In methane, the covalent bond is present between one carbon and four hydrogen atoms.

What is methane?

Methane is the simplest form of saturated hydrocarbons. Methane is an odorless gas as well as a colorless gas. It has one carbon and four hydrogen atoms which is why methane is also called a tetrahedral molecule.

CH₄ is the chemical formula of methane and is a non-toxic but flammable gas. From the tetrahedral structure of methane, we can see that a carbon atom is bonded to four hydrogen atoms.

One molecule of methane contains four covalent bonds. Each covalent bond is formed between the carbon and one hydrogen atom. The formation of a covalent bond between carbon and hydrogen is due to the small electronegativity difference between carbon and hydrogen.

In this way, carbon completes its octet and hydrogen completes its duplet. Therefore, the covalent bond is formed between one carbon atom bond with four hydrogen atoms in methane.

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The distance from one crest to the next crest is ____

Answers

Answer:

Wavelength is the distance from one crest to another, or from one trough to another, of a wave (which may be an electromagnetic wave, a sound wave, or any other wave). Crest is the highest point of the wave whereas the trough is the lowest.

Explanation:

Hope this helps!

Answer:

Wavelength!

Explanation:

Hope this helps, please give me brainliest. ;)

Copy and complete the concept map using the following:
(Na, Fe, actinides, Hg, Cs, Alkali, Inner transition)

Answers

Answer:

a) Alkali

b) Na

c) Cs

d) Inner Transition

e) actinides

f) Fe

g) Hg

Explanation:

K, Na and Cs are all Alkali MetalsFe, Hg and Ag are all Transition Metalsactinides and lanthanides are known as the Inner Transition Metal

in an oxidation-reduction reaction, how is the reducing agent changed?

Answers

Explanation: The additional terminology comes from the definition that, within redox processes, a reductant transfers electrons to an oxidant; hence, the reductant (reducing agent) loses electrons, so is oxidized, while the oxidant (oxidizing agent) gains electrons, so is reduced.

In an oxidation-reduction reaction, the reducing agent loses electrons and loses potential energy, Therefore, option (C) is correct.

What is a reducing agent?

A substance that loses its electrons in a redox reaction to other substances and gets oxidized is called a reducing agent. A reducing agent is one of the reactants which reduces the other reactant by donating the electrons to the reactant of an oxidation-reduction reaction.

If the reducing agent can't pass electrons to another reactant in a reaction, then the reduction process does not occur and the reaction cannot proceed.

In redox reactions, when an electron loses potential energy as a result of the transfer and energy is released. Electrons with more potential energy are associated with less electronegative atoms and less potential energy is associated with a more electronegative atom (such as O).

Therefore, the reducing agent loses electrons and loses potential energy in a redox reaction.

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Your question is incomplete, but probably the complete question was,

In an oxidation-reduction reaction, how is the reducing agent changed?

(A) it gains electrons and gains potential energy

B) it gains electrons and loses potential energy

C) it loses electrons and loses potential energy

D) it loses electrons and gains potential energy

pls help!!! A kitten has a mass of 1582 g and accelerates at 1.7 m/s^2. What is the net force acting upon the kitten?

Write down all the givens from the problem.

Are all of the units in the form required to use the generic equation? If not, then show your conversion.

Write the generic equation (equation with variables only) for this problem. Do not add any spaces between letters or symbols.

Substitute your numbers into the generic equation. This is where you show your math work, step by step. Solve the problem

Enter the numeric portion (numbers only) of your answer here rounded to the nearest tenth.

Enter the numeric portion (numbers only) of your answer here rounded to the nearest tenth.

Answers

Answer:

2689.4

Explanation:

Which of the operations results in sublimation?​

Answers

Answer:

hrjfnd

Explanation:

hfhdhfujduejdjdjdbfudbdjdbdifhdudjdufb

hii thank you for helping me for that question please give me now this question define the air polution​

Answers

Answer:

A mixture of solid particles and gases in the air.

Explanation:

Air pollution is a mixture of solid particles and gases in the air. car emissions, chemicals from factories, dust, pollen and mold spores may be suspended as particles. Ozone, a gas, is a major part of air pollution in cities. When ozone forms air pollution, it's also called smog.

Air pollution can be defined as the presence of toxic chemicals or compounds (including those of biological origin) in the air, at levels that pose a health risk. In an even broader sense, air pollution means the presence of chemicals or compounds in the air which are usually not present and which lower the quality of the air or cause detrimental changes to the quality of life (such as the damaging of the ozone layer or causing global warming).

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help me plsss yall??????

Answers

Answer:

First one answer is physical and other remaning chemical

Answer:

Hydrogen is a colorless, tasteless, and odorless gas.  

physical

--------------------------------------------------------------------------------------------------------------

Hydrogen is very combustible in the presence of oxygen.  

chemical

--------------------------------------------------------------------------------------------------------------

Hydrogen is very reactive with most elements.  

chemical

--------------------------------------------------------------------------------------------------------------

Hydrogen is the least dense of all elements.  

physical

what is the purpose of an auxiliary complexing agent?

Answers

Answer:

prevent hydroxide formation

Explanation:

* What element has an electron configuration of
1s2 2s2 2p6 3s2 3p6 4s2 and which block is it in? Use the periodic table.

Answers

Answer:

phosphorus

Explanation:

pls help ——————————
—————-

Answers

Answer:

X has 9 Electrons, 9 Protons and 10 Neutrons

X is Fluorine

Explanation:

19 in X is Nucleon number

So, if you minus 19 by 9 down there (which is proton number) you'll get 10 (Neutron number).

Now, Proton = Electron. That's why Electron is 9 too. I figured that X is Fluorine bcuz it has 9 Electrons. If you venture around in the periodic table, fluorine is the ninth element innit.

hope this helps ya \(^o^)/

Someone pls help me I will make you brain

Answers

I think it's true look at the picture

Answer:

false, true and i dk what the other answer choices are for the 3rd questions

Explanation:

a thermometer used to measure the temperature of food must be accurate to what temperature?

Answers

Answer:Accuracy Thermometers used to measure the temperature of food need to be accurate to +/-2°F or +/-1°C. Thermometers used to measure air temperature in food storage equipment need to be accurate to +/-3°F or +/- 1.5°C. A hanging thermometer in a walk-in cooler is an example.

Explanation:

We are the family members and love to
react with potassium (K).
Who we are?

Answers

Answer:wth does this even mean

Explanation:

All of the halogens react with potassium (K)

lol can some have helo me out its easy
1, 2 and 3

Answers

Answer:

1. A

2. C

3. C

Explanation:

1. there are single cell organisms

2. all others are abiotic factors

3. individual is just one, population is one species, community is all populations, ecosystem includes abiotic and biotic factors, biome is a large geographical area.

#no spams ,
ur answer will be reported if u do


Answers

[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]

First State : Punjab

soil - Alluvial soil

crops - Cotton, wheat, sorghum, bajra, maize, barley, jute, tobacco, green and black gram, chickpea, pigeon pea, etc.

Suitable properties : Mix of sandy loam and clay soil. Quick draining in nature. Rich in humus (organic matter) and phosphoric acid

Second state : Maharashtra

soil - black soil

Crops - Cotton is the major crop. Other crops include wheat, cereals, rice, jowar, sugarcane, linseed,

Suitable properties : Black soils get sticky when fully wet. Rich in magnesium, iron, aluminum, and lime. They moisture excellently.

Third state : Orrisa

soil - laterite soil

crops - wheat, rice, pulses, rubber, tea, coffee, coconut, and cashews.

suitable properties : These Soils are acidic in nature and coarse and crumbly in texture. it is also rich in iron content.

Fourth state : Rajasthan

soil - Arid soil

crops - Barley, maize, wheat, millets, cotton, and pulses.

Suitable properties - Sandy soils with low clay content, Saline in nature. Rich in plant food. Poor in organic matter and moisture because arid regions are usually dry.

Fifth state : Sikkim

soil - Mountain and Forest Soil

Crops- Wheat, barley, maize, tea, coffee, spices, tropical and temperate fruits.

Suitable properties - Acidic soil, rich in organic matter. Poor in lime, phosphorus, and potash. Good fertilization is required in these soils.

Which of the following statements is true?
a. An ion is negative if it has more protons than it
has electrons.
b. An ion is negative if it has more electrons than
it has protons.
c. An ion is neutral if it has an equal number of
electrons and protons.
d. An ion is positive if it has more electrons than it
has protons.
e. An ion is positive if it has more protons than it
has neutrons.

Answers

Answer:

E- an ion is positive if it has more protons than it has neutrons

DO the following conversion ​

Answers

Answer:

Kim Sam Mi Da!!

Explanation:

Da Mi Sam Kim!!

.
If the Moon orbited Earth twice as fast, how many high tides would occur in one day?

Answers

Four high tides would occur in one day, if the moon orbited Earth twice as fast.

What are high tides?

The tide when the water is at its greatest elevation.

At the moment, high tides occur twice a day. So if the moon orbits the earth twice as fast, high tides will occur twice as many, which means four times a day.

High tides occur 12 hours and 25 minutes apart. It takes six hours and 12.5 minutes for the water at the shore to go from high to low, or from low to high.

The best-known effect of the moon is its gravitational pull on Earth's oceans, which results in two high tides and two low tides every day.

But if the moon were half the distance from Earth as it is now, the tides would be eight times higher.

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a noncovalent interaction between two molecules is known as

Answers

The three major types of intermolecular interactions are dipole–dipole interactions, London dispersion forces (these two are often referred to collectively as van der Waals forces), and hydrogen bonds.

A non-covalent interactions between  molecules are van der Waal's forces and hydrogen bonds.

What are non-covalent interactions?

Non-covalent interaction is an interaction which does not involve sharing of electrons and in this aspect it differs from covalent bond.It rather involves dispersed variations  of electromagnetic interactions  which are present between the molecules or within the molecule.

The energy released during the formation of these interactions  is of the order of 1-5 kcal .They are classified as electrostatic, pi effects , van der waals forces  and hydrophobic effects.

They are important in maintaining the three dimensional structure of large molecules such as proteins ,nucleic acids ,etc.They are also involved in biological processes . They heavily influence drug design process and design of materials.

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how to calculate atomic mass of sodium ?(in process)​

Answers

Answer:

Atomic mass of Sodium is 22.9897 u. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. The unit of measure for mass is the atomic mass unit (amu). One atomic mass unit is equal to 1.66 x 10 -24 grams.

Explanation:

what happens when chocolate get heated?

Answers

well the chocolate will be melt

hope it helps

Explain how the fire spreading from tree to tree provides a model for conduction.
The great fire of 1910 burned through parts of north Idaho, western Montana, eastern Washington,and southeastern British Columbia. Many small fires and several large fires that were started by an electric storm coalesced into one”big blowup” of unprecedented size that lasted two days. Hurricane-force winds spread the firestorm; trees became blowtorches, sucking fire from the ground and hurling it in several directions, spreading the fire on contact. Witnesses described fireballs being flung like cannons. Trees exploded like fireworks. The fire killed 87 people, destroyed towns in its path, and burned more than three million acres of forest

Answers

the fire spreading is what represents the form of heat transferring from one atom to another within an object and direct contact

aluminum has a density of 2.70 g/cm^3, a sample with a volume of 50 cm^3 will have how much mass?

Answers

Answer:

135 g

Explanation:

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

mass = Density × volume

From the question

density = 2.70 g/cm³

volume = 50 cm³

We have

mass = 2.70 × 50 = 135

We have the final answer as

135 g

Hope this helps you

What does the graph show about the rate of temperature change over time?

Answers

Answer:

The temperature is the same overtime.

Explanation:

Since the line on the graph is straight the temperature will be constant.

What kind of interaction
(attraction/repulsion) will happen
between the core electrons and the
valence electrons?

Answers

The balance between attractive and repulsive forces results in shielding. The orbital (n) and subshell (ml) define how close an electron can approach the nucleus. The ability of an electron to get close to the nucleus is penetration.

I hope this helps out! Have a nice day :)

Which of the following properties is a chemical property?

Answers

Answer:

flammability, toxicity, acidity, reactivity are some examples.

sorry you left out your options.

Answer:

Where are the options

Explanation:

Can you be a little more specific about your question?

Which phrase describes the thermal energy of a sample of matter?

O A. The total kinetic energy of the particles of matter
B. The kinetic energy of the slowest particles of matter
O C. The average kinetic energy of the particles of matter
O D. The temperature of the fastest particles of matter

Answers

The answer is A: The total kinetic energy of the particles of matter. I hope this helps

Answer:

O A. The total kinetic energy of the particles of matter

Explanation:

I got it right on assignment. (°ω°)

Please answer quickly

Answers

Answer:

a) II and III

is the correct

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