А
What is the chemical symbol for Hydrogen?
A.OCH
B.оне
C.Н
D.он20

Answers

Answer 1

Answer:

the answer to this is ( H )


Related Questions

each year, one person in north america uses resources equal to how much land? A. 12 miles B. 12 acres C. 120 acres

Answers

B. 12 acres

i think i don’t do geography

Which of the following is NOT an example of a change of state? *
HELP PLSSSSSS
Plants using photosynthesis to produce food.
Liquid water in perspiration changes to a gas when it evaporates.
An ice cream cone melts, forming a liquid.

Answers

Answer:

Plants using photosynthesis to produce food.

Answer:

the icecream one is not an example

A large piece of iron was reacted with an acid. What would happen to the rate of the reaction had the large piece been finely divided into smaller pieces? (1 point)
It will decrease because the reactant particles are moved farther apart.
It will increase because the reactant particles are brought closer together.
It will decrease because larger particles provide more surface area to react.
It will increase because smaller particles provide more surface area to react.

Answers

Answer:

D: It will increase because smaller particles provide more surface area to react.

Explanation:

When the large iron is broken up into smaller pieces, there are more places for the iron to react (meaning there's more surface area). Think of it like taking the surface area of a big cube compared to the surface area of a bunch of small cubes. The sum of the surface areas of the small cubes will be greater than that of the large cube. As a result, more places for the iron to react will cause for a greater reaction.

Answer: D It will increase because smaller particles provide more surface area to react.

Which has a lower electronegativity and why? N or P? Use 'force of attraction' in your answer

Answers

Answer:

The electron sets divided among two particles are not really shared similarly. For instance, while the common electron sets are shared similarly in the covalent security in Cl2, in NaCl the 3s electron is taken from the Na iota and is fused into the electronic design of the Cl molecule - and the compound is most precisely portrayed as comprising of individual Na+ and Cl− particles (ionic holding). For most covalent substances, their bond character falls between these two limits. We showed beneath, the bond extremity is a helpful idea for portraying the sharing of electrons between molecules inside a covalent bond:

A nonpolar covalent bond is one in which the electrons are shared similarly between two particles.

A polar covalent bond is one in which one iota has a more noteworthy fascination for the electrons than the other molecule. On the off chance that this overall fascination is sufficiently incredible, the bond is an ionic bond.

Explanation:

Which of the following conditions must be met for a volume ratio to be created from a balanced chemical equation? (3 pm
O Changing temperature and pressure
Constant temperature and pressure
Changing temperature and constant pressure
Constant temperature and changing pressure

Answers

Answer:

The answer will be Constant temperature and pressure

Explanation:

Just took the test and it was correct 100%!!!

Answer:

Constant temperature and pressure

Explanation:

took the test

Which of the following reactions is single replacement?

Answers

The reaction in ‘d’ is the answer

Which statements describe the motion of the object represented by the graph? Select three options.

The object is moving away from the origin.
The object is moving towards the origin.
The object started at the origin.
The object started at 2 meters.
The object is traveling at a constant velocity.

Answers

Answer:

The object is moving away from the origin

The object started at 2 meters

The object is traveling at a constant velocity

Explanation:

Statements which best describe motion of object represented by graph are statement A,D and E.

What is motion?

Motion is defined as a phenomenon which is described with respect to change in object's position with respect to time.It is given in terms of displacement,velocity,distance ,acceleration,speed.

Branch of physics which deals with motion of objects without any reference to it's cause is called kinematics while the branch which studies forces and their effects on motion is called as dynamics.

Motion applies to various systems like objects,bodies, matter particles ,radiation ,curvature.There are three laws of motion which are proposed by Newton.Classical mechanics is based on Newton's law of motion.Relativistic  mechanics is based on modern kinematics.

Learn more about motion,here:

https://brainly.com/question/3421105

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SHOW WORK
What volume of 9.0 M copper (II) sulfate stock solution is needed to prepare 3.0 L of a 5.0 M solution?

Answers

Answer:

The volume of 9.0 M copper (II) sulfate stock solution needed to prepare 3.0 L of a 5.0 M solution is 1.667 L

Explanation:

Dilution is a process by which the concentration of a solute in solution is reduced by adding more solvent.

In other words, dilution is the procedure followed to prepare a less concentrated solution from a more concentrated one, and it simply consists of adding more solvent.

In a dilution the amount of solute does not vary. What varies in a dilution is the volume of the solvent: as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.

The equation used in this case is:

Ci * Vi = Cf * Vf

where

Ci: initial concentration Vi: initial volume Cf: final concentration Vf: final volume

In this case:

Ci: 9 M Vi: ? Cf: 5 M Vf: 3 L

Replacing:

9 M*Vi= 5 M* 3 L

Solving:

[tex]Vi=\frac{5 M*3 L}{9 M}[/tex]

Vi= 1.667 L

The volume of 9.0 M copper (II) sulfate stock solution needed to prepare 3.0 L of a 5.0 M solution is 1.667 L

6.022 x 10^23 atoms of calcium.
What is the mass?

Answers

Answer:

(6.02214179×1023) / one mole of substance. How many atoms are in a 3.0 g sample of sodium (Na)?

Explanation:

Answer:

Explanation:

Mass is 1.000

How many atoms for each element in this compound:
Pb3(PO4)2
Pb =
P=
O=

Answers

Answer:

In the compound Pb3(PO4)2, there are 3 Pb atoms, 2 P atoms, and 8 O atoms.

Let me know if this helps!

There are 3 atoms of pb(Lead), 2 atoms of P(Phosphorus) and 8 atoms of O(Oxygen) are present in Pb3(PO4)2.

What is an atoms?

An atom is the smallest constituents of matter that can neither be created nor be destroyed.An atom It consists of a central nucleus, usually surrounded by electrons. Each electron is negatively charged. The nucleus is positively charged, and contains relatively heavy particles known as protons and neutrons.

What are Compounds?

A compound is a combination of atoms of same or different types of an element in a fixed ratio.

In the given question Pb3(PO4)2 is a compound of lead phosphate which is made up of 3 atoms of pb(Lead), 2 atoms of P(Phosphorus) and 8 atoms of O(Oxygen).

Learn more about atoms here: http://brainly.com/question/6258301

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11. How many elements do all the "P" orbital span (go across) in each period? (circle your answer)
a) 2
b) 6
c) 10
d) 14

Answers

Answer: B

can u pls give me brain list?

Describe two patterns in the periodic table?

Answers

Answer:

Patter 1: Ionization Energy Decreases going down a group

Pattern 2: Ions tend to gain/lose the least amount of electrons

Take oxygen, for example.  Oxygen has 8 electrons. To become like a noble gas it could either gain two to become  like neon or it could lose six to become like helium. So what will oxygen do—gain two  or lose six? As a general rule, atoms will gain or lose the fewest number of electrons  possible.

Explanation:

Beryllium oxide is heated.
What is the chemical reaction equation?

Answers

Answer:

BeO

Reaction of beryllium with air

However, powdered beryllium metal does burn in air to give a mixture of white beryllium oxide, BeO, and beryllium nitride, Be3N2. Beryllium oxide is more normally made by heating beryllium carbonate. 2Be(s) + O2(g) → 2BeO(s)

I am the life cycle that contains tiny undeveloped plants,
but I still have enough food for growth. Who am I?


Please help PLEASE

Answers

the water cycle regardless if it is in a lake, our bodies, food, or underground.

In a sealed container at constant pressure, the volume is 25L. When cooled down to 100K the volume decreases to 6.25L. What was the original temperature of the container? *
A. 50k
B. 100k
C.250k
D.400k

Answers

It would probably be D

What is acetic acid (CH3COOH)

Answers

Answer:

Acetic acid (CH3COOH), also called ethanoic acid, the most important of the carboxylic acids. A dilute (approximately 5 percent by volume) solution of acetic acid produced by fermentation and oxidation of natural carbohydrates is called vinegar; a salt, ester, or acylal of acetic acid is called acetate.

Answer:

the acid that gives vinegar its characteristic taste. The pure acid is a colourless viscous liquid or glassy solid.

Explanation:

HOPE IT HELPS YOU......

pls help me!!!!
A.Ants and tarantulas
B.Rats and Snakes
C.Cacti and Sagebrush
D.Hawks and Coyotes

Answers

Answer:

C since both are plants which are the producers

Answer:

Cacti and Sage Brush

Explanation:

because they are plants so they produce food on their own

What is the correct formula for the compound formed by Mg and F?
MgF
Mg2F
Mg2+F
MgF2

Look at picture
ASAP please will mark as brainlist don’t got much time

Answers

Magnesium phosphate

Find Similar Structures

Molecular Formula

Mg3(PO4)2 or Mg3O8P2

Synonyms

magnesium phosphate

More...

Molecular Weight

262.86 g/mol

The answer is MgF2 as valency of Magnesium is 2 and Fluorine is 1 and by crossing it we thus get MgF2

Compare and contrast the Ionization energies of groups 1&2 (Alkali and Alkaline metals) with the Ionization energies of groups 16&17 (Oxygen family and Halogens)

Answers

Answer:

Ionization energy is the energy required to remove an electron from a specific atom. It is measured in kJ/mol, which is an energy unit, much like calories. The ionization energies associated with some elements are described in the Table 1. For any given atom, the outermost valence electrons will have lower ionization energies than the inner-shell kernel electrons. As more electrons are added to a nucleus, the outer electrons become shielded from the nucleus by the inner shell electrons. This is called electron shielding .

Explanation:

a little summary

Ionization energy refers to the amount of energy needed to remove an electron from an atom.

Ionization energy decreases as we go down a group.

Ionization energy increases from left to right across the periodic table.

Based on Avogadro's principle, the coefficients in chemical equations involving only gases represent two types of quantities. Name the two quantities.

Answers

Answer:

subject

Chemistry, 08.04.2020 04:39 dnprops1544

Based on Avogadro's principle, the coefficients in chemical equations involving only gases

represent two types of quantities. Name the two quantities.

Explanation:

Answer: Molar ratio is the quantity which will correctly convert between two different substances.

Answer: Option B

Explanation:

Molar ratio is used to determine the number of moles of reactants required to convert to desired number of moles of the products and vice versa. As moles are the coefficient written in any chemical equation. The ratio of the number of moles of the reactants to the number of moles of the products will help to determine the molar ratio.

This molar ratio is used as the conversion factor to determine number of moles required in the reactant side for the reactants to form a desired product of desired moles. We can also determine the number of moles utilized from the reactants from the moles obtained in the products using this molar ratio conversion factor.

When the Hubble Space Telescope was first launched, it was the most advanced technology of its kind. Astronomers and astrophysicists all over the world celebrated its launch. Why was this event so important to these scientists?

1. Hubble provided a new way to study Earth's atmosphere.
2. Hubble proved that we could launch a telescope into space.
3. Hubble provided scientists with data about the Universe they had previously been unable to collect.
4. Hubble was able to collect physical samples from celestial bodies they had previously been unable to reach.
please help me

Answers

Answer:

C

Explanation:

its correct

''Hubble provided scientists with data about the Universe they had previously been unable to collect.'' is the right statement.

Benefits of Hubble  Space Telescope

Hubble  Space Telescope helps the scientists to collect more data about the Universe which they had previously been unable to collect due to lower range of telescope.

This telescope has longer range and can see distant objects very clearly in the space so we can conclude that ''Hubble provided scientists with data about the Universe they had previously been unable to collect.'' is the correct statement.

Learn more about telescope here: https://brainly.com/question/18300677

YOU DO:
1) What volume of 0.25M lithium fluoride solution can be made by dissolving 5.0 g lithium fluoride, LiF?

Answers

Answer:

0.7712 L

Explanation:

Molarity = 0.25M

Volume = ?

Mass = 5.0 g

The relationship between these quantities is given as;

Molarity = Number of moles / Volume

Volume = Number of moles / Molarity

Number of moles = Mass / Molar mass

Molar mass of LiF = 25.939 g/mol

Number of moles  = 5 / 25.939 = 0.1928 mol

Volume = 0.1928 / 0.25 = 0.7712 L

A tall plant (Tt) is crossed with a short plant (tt). What is the phenotype of the offspring?

Group of answer choices

100%

75% tall; 25% short

25% tall; 75% short

50% tall, 50% short

Answers

50 50 is the answer

Story that ends in i have never found such a kind person ever since ​

Answers

Answer:

I was traveling on a train where I fell asleep. someone stole my luggage in which I had money and other essentials. when the ticket checker arrived a lady paid my fine. she helped me a lot. when I told her about being robbed she helped me and took me to the police station and I found my bag. I insisted she take the money she paid for my fine but she said that in return you too help someone."I have never found such a kind person ever since.".....

Explanation: I think this is what you are looking for. Hope this helps.

Vacuum-packaging food is an effective means for stopping the growth of bacteria.
true or false

Answers

Answer:

True

Explanation:

Vacuum packing is a method of packaging that removes air from the package  before sealing. ... On a more short-term basis, vacuum packing can also be used to store fresh foods, such as vegetables, meats, and liquids, because it inhibits bacterial growth. Vacuum packing greatly reduces the bulk of non-food items.

hear me out!! am I the only one who gets headaches on the daily? why do I get them?​

Answers

Answer:

Same i have headaches daily, maybe from infections such as meningitis or Intracranial pressure that's either too high or too low or id.k.


Identify which is the result of a physical rather than
a chemical change?

Answers

Answer:

b

Explanation:

Work = Force X Distance A dog pulls a ball with 5N of force for 4 m. How
much work did the dog do?*

Answers

Answer:

W = 20 J

Explanation:

Given that,

The force acting on the dog, F = 5 N

Distance covered, d = 4 m

We need to find the work done by the dog. The work done by an object is given by :

W = Fd

Put all the values,

W = 5 N × 4 m

W = 20 J

So, 20 J of work is done by the dog.

What is the molecular formula of a compound with an empirical formula P2O5 and a gram-molecular mass of 284 grams? And why?

Answers

I really don’t know but

Phosphorus pentoxide is a white solid which does not have any distinct odour. The chemical formula of this compound is P4O10. However, it is named after its empirical formula, which is P2O5. The molar mass of phosphorus pentoxide corresponds to 283.9 g/mol.

*2Al(OH), + 3H,SO, Al(SO4)2 + 6H2O
reaction type

Answers

Substitution because you switch some of the other atoms when you get to the other side
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