which metals or non-metals are liquid at a room temperature of 25°C?​

Answers

Answer 1

Answer:

gallium

Explanation:

it is the old melting in a hot cup of coffee spoon

Answer 2

Answer:

Elements That Are Liquid at 25°C

•Bromine

•mercury

Explanation:

The metal which exist as a liquid at room temperature is mercury.

Non-metal which exist as a liquid at room temperature is bromine.

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Related Questions

can someone please explain core and valence electrons in periods for me please​

Answers

Answer:

The electrons of an atom are typically divided into two categories: valence and core electrons. Valence electrons occupy the outermost shell or highest energy level of an atom while core electrons are those occupying the innermost shell or lowest energy levels

Explanation:

i hope u get it :))

ionic bonds show which characteristics that arent seen in covalent bonds

Answers

Ionic bonds are when one atom is a metal and the other is a nonmetal. One atom has a high electronegativity value while the other value is relatively low. Electrons are transferred in ionic bonds.

In a covalent bond atoms are equal or similar in electronegativity values and both of the atoms are also non metals. Electrons are shared in covalent bonds.

specific rights related to freedom of expression​

Answers

Answer:

beliefs, thoughts, ideas, and emotions

Explanation:

freedom of expression guarantees the freedom to express oneself without government censorship or media censorship.

2. Which equation does not represent a neutralisation reaction?
HELP PLEASE

Answers

Answer:

Zn + 2HCl => ZnCl2 + H2

Explanation:

This equation represents salt formation or salt preparation. Thus not a neutralization reaction.

Give the IUPAC name of the following compound

Answers

Answer:

3-phenylprop-2-enal

Explanation:

The given compound consists of a phenyl group, which is the ring

Considering the longest chain starting from the carbon atom closest to the  aldehyde, CHO, functional group, the location of the phenyl group is at the 3rd carbon atom on the longest chain

C6H5-C₃H = C₂H - C₁HO

Therefore, for the name of the branched group, we have;

3-phenyl

Based on the location of the double bond, at the second carbon atom, we have;

The name of the straight chin = Prop-2-ene

The name of the aldehyde functional group, CHO, is then added at the end by indicating its position on the longest chain, which is on the first carbon, the IUPAC name of the aldehyde functional group is -al, to give;

1-al

Combining, we get

3-phenylprop-2-ene-1-al

We remove the 1, to get the IUPAC name of the compound as follows;

3-phenylprop-2-enal

Nat+ is which of the following

1. a solution
2. a mixture
3. an ion
4. a compound

Answers

Answer:

3.

[tex]{ \tt{Na {}^{ + } }} \: is \: an \: ion[/tex]

Nitrogen in plants and soil is changed into nitrogen compounds by _____ ?

Answers

Nitrogen Fixation because It's the process by which atmospheric nitrogen is converted either by a natural or an industrial means to form of nitrogen such as ammonia.

What does a low number on the pH scale say about a solution?
A. The solution is neutral.
B. The solution is a base.
C. The solution is changing.
D. The solution is an acid.

Answers

Answer:

d. the solution is a acid

Answer:D The solution is an acid

Explanation:The lower the pH of a substance the stronger the acidic level.

If one of the reactants in a reaction us Na2O, what is known about the products?

Answers

The answer should be A.

Ok here's the deal

the answer is A: The products will contain exactly 2 Na atoms and 1 O atom.

Explanation:

thank me later space-ex kids

Which of the following equations is balanced?
(options in photo)

Answers

Answer:

Option (B)

Explanation:

Na2SO4 (aq) + CaCl2 (aq) → CaSO4 (s) + 2 NaCl (aq)

The image shows two siblings with their grandparents.



Which best explains why the siblings look more like each other and less like their grandparents?

The siblings are more closely related to each other than they are to their grandparents.
Each sibling is more closely related to the grandparents than to the other sibling.
The grandparents do not have any shared characteristics in common with the siblings.
The grandparents do not have any shared characteristics with one another.

Answers

Answer:

the siblings are more closely related to eachother than they are to their grandparents

Answer:

a

Explanation:

A mixture of 0.5940 M CO and 0.3950 M Cl2 is enclosed in a vessel and heated to 1000 K . CO(g)+Cl2(g)↽−−⇀COCl2(g)c=255.0 at 1000 K Calculate the equilibrium concentration of each gas at 1000 K

Answers

Answer:

[CO] = 0.2064M

[Cl2] = 0.0074M

[COCl2] = 0.3876M

Explanation:

Based on the reaction, Kc at 1000K is:

Kc = 255.0 = [COCl2] / [CO] [Cl2]

Where [] are concentrations at equilibrium

As the reaction is 1:1, the concentrations at equilibrium are:

[CO] = 0.5940M - X

[Cl2] = 0.3950M - X

[COCl2] = X

Where X is reaction coordinate

Replacing:

255.0 = [X] / [0.5940 - X] [0.3950 - X]

255.0 = X / 0.23463 - 0.989 X + X²

59.8307 - 252.195 X + 255 X² = X

59.8307 - 253.195 X + 255 X² = 0

Solving for X:

X = 0.605M. False solution because produce negative answers

X = 0.3876M. Right solution.

Replacing:

[CO] = 0.5940M - 0.3876M

[Cl2] = 0.3950M - 0.3876M

[COCl2] = 0.3876M

[CO] = 0.2064M

[Cl2] = 0.0074M

[COCl2] = 0.3876M

The concentration at equilibrium of CO is 0.2064 M, [tex]\rm Cl_2[/tex] is 0.0074 M, and [tex]\rm COCl_2[/tex] is 0.3876 M.

The initial concentration of CO = 0.5940 M

[tex]\rm Cl_2[/tex] = 0.3950 M

At equilibrium,

Let the concentration of formed [tex]\rm COCl_2[/tex] = x

Concentration of CO = 0.5940 - x M

Concentration of [tex]\rm Cl_2[/tex] = 0.3950 - x M

[tex]\rm K_c[/tex] = 255

[tex]\rm K_c[/tex] = [tex]\rm \dfrac{[COCl_2]}{[CO]\;[Cl_2]}[/tex]

255 = [tex]\rm \dfrac{x}{[0.5940-x]\;[0.3950-x]}[/tex]

(151.47 - 255x) (100.727-255x) = x

15,256 - 65,025 [tex]\rm x^2[/tex] = x

0 =  65,025 [tex]\rm x^2[/tex] +x - 15,256

x = [tex]\rm\dfrac{-b\;\pm\;\sqrt{b^2\;-\;4ac} }{2a}[/tex]

a = 65,025

b = 1

c = -15,256

x = 0.38 M

Thus, the concentration at equilibrium of CO is 0.2064 M, [tex]\rm Cl_2[/tex] is 0.0074 M, and [tex]\rm COCl_2[/tex] is 0.3876 M.

For more information about the equilibrium concentration, refer to the link:

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A se ion has a mass number of 77
and a charge of −2
. Determine the number of neutrons, protons, and electrons in this ion.

Answers

Answer:

1. Neutron number = 43

2. Proton number = 34

3. Electron number = 36

Explanation:

From the question given above, the following data were obtained:

Mass number = 77

Charge of ion = –2

1. Determination of the number of neutron.

Mass number of Se = 77

Atomic number = 34

Neutron number =?

NOTE: Atomic number = proton number

Mass number = Proton + Neutron

77 = 34 + Neutron

Collect like terms

77 – 34 = Neutron

Neutron number = 43

2. Determination of the proton number.

The atomic number of an element is simply defined as the number of protons in the atom of the element. Mathematically,

Atomic number = Proton number

Atomic number of Se = 34

Therefore, the proton number of Se²¯ is 34.

NOTE: The atomic number does not change be it atom, ion or molecule. It remains the same.

3. Determination of electron number.

Charge of ion = –2

Proton number = 34

Electron number =?

Proton – Electron = Charge

34 – Electron = –2

Rearrange

34 + 2 = Electron

36 = Electron

Electron number = 36

There are 43 neutrons, 34 protons, and 36 electrons in the given selenium ion with a (-2) charge.

Explanation:

Given:

A selenium ion with a mass number of 77  and a charge of (-2).

To find:

The number of neutrons, protons, and electrons in selenium ion

Solution:

Charge on the selenium  ion = -2

The atomic number of selenium = 34

Number of protons = Atomic number

Number of protons in selenium atom = 34

Number of protons in selenium ion = 34

Number of electrons in selenium atom = 34

Number of electrons in selenium ion=  34+2 = 36

(anion is formed by gaining of electrons that is why adding two electrons )

The mass number of selenium = 77

Mass number = Number of protons + Number of neutrons

77 = 34 + Number of neutrons in selenium

Number of neutrons in selenium ion = 77 - 34 = 43

There are 43 neutrons, 34 protons, and 36 electrons in the given selenium ion with a (-2) charge.

Learn more about atoms and ions here:

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Which one is it ?? Hurry please!!

Answers

Answer:

3-Ethyl-2,4-Dimethylhexane

Explanation:

3-ethyl-2,4-dimethylhexane

The ksp of StS04 is 3.2x10-7 What is the equilibrium concentration of sulfate lon a 1.0-L solution of strontium sulfate to which 0.10 mol of Sr(CH3CO2)2 has been added?

Answers

Answer:ehwusvudhwdvwxkwvbxbwxbxiwhxjvwxjvxwjxvjxvwxiwvxiwzgiwxvwjsbwis

HOPE IT HELPS IF YOU LIKE MY ANSWER THEN MARK ME AS BRAINLIEST ;-);-)

Please select the word from the list that best fits the definition
Flow of blood from the heart to the body tissues and back to the heart

Artery
Vein
Capillary
Systemic Circulation
Pulmonary Circulation

Answers

Answer:

Systemic Circulation

Explanation:

Answer:

Systemic Circuit

Systemic circulation carries oxygenated blood from the left ventricle, through the arteries, to the capillaries in the tissues of the body. From the tissue capillaries, the deoxygenated blood returns through a system of veins to the right atrium of the heart.

Explanation:

I hope it's helpful for you ☺️

Open Ended
21. What does it mean to say that "atoms are not created or destroyed" in a chemical reaction?
22. In a chemical reactičn, is it possible to change the amount of products by changing the
amount of reactants? Why?
23. Can atoms that are not in the reactants end up in the products of a chemical reaction? Why?
24. How would you prove that a chemical equation is balanced?

Answers

Answer:

Explanation:

21. Atoms are not created or destroyed means that atoms that you begin with are the atoms that you will end with. The catch is that the atoms will rearrange to give you new compounds, but the atoms that you initially had are the atoms you will still have after reaction. For eg, if you started with eggs and made omelet. Omelet is a "new" compound, but the atoms that were in the eggs have rearranged to become the omelet so can you see that atoms were not created or destroyed to make the omelet.

22. Yes because amount of products you make depends on how much reactants you have. For eg, I need two graham cracker(GC), one marshmallow(M), and one chocolate (C) to make a s'more. If I get more of each item then I can make more s'mores and consequently having minimum amounts results in less s'mores that I make.

23. Not possible, due to law of conservation of matter and energy. Atoms cannot be created nor be destroyed, they are simply rearranged. For eg, Taking A + B cannot give you a new compound with a chemical formula D or XZ. A + B can however give you AB which is rearrangement of the starting atoms.

24. Chemical equation is balanced when atoms on reactant side and atoms of product side are in equal counts. I have attached a graphic below for more help.

H2O có tác dụng được với O2 không?​

Answers

Answer:

A water molecule (formally known as dihydrogen monoxide) is composed of two hydrogen atoms and one oxygen atom. ... In English, the equation says: To produce two molecules of water (H2O), two molecules of diatomic hydrogen (H2) must be combined with one molecule of diatomic oxygen (O2).

how much energy (in joules) is needed to change 45.0 grams of ice at -25.0 C to water at 49 C?

Answers

Explanation:

The heat required to convert 25 grams of -10 °C steam is 78360 J or 78.36 kJ.

can anyone tell me how i can balance this equation: Al203 = Al (l) + O2(g)
into this balanced equation: 2Al203(l) =4Al(l)+ 3O2(g)

Answers

Answer:

Explanation:

please see the picture

How is the AHfusion used to calculate the energy required to vaporize a
volume of liquid?
O A. Liters liquid x 1000ml/1L x ml/g x g/mol x AHfusion
O B. Liters liquid x 1000ml/1L x g/ml x mol/g < 1/A Hfusion
C. Liters liquid 1000ml/1L x ml/g x g/mol < 1/AHfusion
O D. Liters liquid x 1000ml/1L x g/ml x mol/g < AHfusion

Answers

Your Question is complete but the options are very much confusing and contradicting. Below you will find the true and full content.

The correct answer for the given question about Enthalpy of vaporisation is ( Volume of liquid in L x 1000 g/L x ΔHvap cal/gm ) where ΔHvap = 540 cal/gm (in case of water).

What is Enthalpy of vaporisation ?

The amount of energy (enthalpy) required to convert a portion of a liquid into a gas is known as the enthalpy of vaporisation, abbreviated as ΔHvap  and also referred to as the latent heat of vaporisation or heat of evaporation.

How to solve this question?

Let E be the energy required to calculate the energy required to vaporise a volume of liquid.

Then,

E = Volume of liquid in L x Density of liquid in gm/L  x ΔHvap in cal/gm

and E will came out in calorie.

E = Volume of liquid in L x 1000 g/L x 540 cal/gm --- (in case of water)

Thus we can conclude that to calculate the energy required to vaporise a volume of liquid, we can use the formula with ΔHvap which is E = (Volume of liquid in L x Density of liquid g/L x ΔHvap cal/gm ) and the answer will be in calorie.

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1/10
Mixtures in which one ingredient dissolves in
another to form an uniform systerp are known
as suspensions.
Truth or false?

Answers

Answer:

True.

Explanation:

Suspensions are formed when a mixture is not fully dissolved in another mixture, and happens when solid particles can be seen floating on the surface of the mixture of the mixtures.

CHEMISTRY HW... DUE in 2.5 hours! HELP!!!!

Answers

Answer:

The final temperature aluminium-water system is 24° C

Explanation:

Heat energy, H = mcθ

Where m is mass of substance, c is specific heat capacity, θ is temperature difference

Using the principle, Heat lost = Heat gained

Let the final temperature of the aluminium-water system be Tfinal

Heat lost by aluminium, H₁ = -m₁c₁(Tfinal - 40)

Heat gained by water, H₂ = m₂c₂(Tfinal -21)

Heat lost by aluminium, H = -[30 × 0.21 × (Tfinal - 40)]

H₁ = -6.3Tfinal + 252

Heat gained by water, H₂ = 50 × 1.0 × (Tfinal - 21)

H₂ = 5Tfinal - 21

Equating H₁ and H₂

-6.3Tfinal + 252 = 5 Tfinal - 21

5Tfinal + 6.3Ffinal = 252 + 21

11.3 Tfinal = 273

Tfinal = 273/11.3

Tfinal = 24° C

Therefore, the final temperature aluminium-water system is 24° C

pls answer the following question for me

Answers

1. and C.

Terrycot is a fiber that is made by mixing two fibers. Terrycot is a blended fabric made of terylene and cotton. It has better absorbing power as compared to Terylene. Nylon and terylene are produced through condensation polymeriztation.

Hope it helps...

Answer:

Explanation:

1-B

2-A

3-D

4-C

In animal skin tissue, cell division is responsible for

A. Growth and repair
B. Sexual reproduction
C. Obtaining energy
D. production of sex cells

Answers

Answer: Its A Your Welcome

In animal skin tissue, cell division is responsible for growth and repair. The correct answer is option A.

Cell division is the process by which a single cell divides into two or more daughter cells. This process is essential for growth, repair, and reproduction in living organisms.

Cell division in animal skin tissue is responsible for growth and repair. When the skin is damaged, cells divide to repair the damaged area.

There are two main types of cell division:

Mitosis is the process of cell division that produces two identical daughter cells.Meiosis is the process of cell division that produces four genetically diverse daughter cells, used in the production of gametes (sex cells).

Additionally, cell division is responsible for the growth of skin tissue during development and throughout the life of the organism.

Therefore, the correct answer is option A. Growth and repair.

Learn more about Cell division here:

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equivalent massof sodium​

Answers

Answer:

Sodium

Formula : Na

Equivalent mass:23.0

Mark me as Branliest

Please answer. Brainliest!

Answers

Answer:

the equation is unbalanced

Jason combines the two intermediate steps shown. 2 equations. First: upper N subscript 2 (g) plus upper O subscript 2 (g) right arrow 2 upper N upper O (g). Second: 2 upper N upper O (g) plus upper O subscript 2 (g) right arrow 2 upper N upper O subscript 2 (g). Which best describes what Jason should do with the oxygen molecules?

Answers

Answer:

The molecules of oxygen should be placed as reactants in the equation.

Explanation:

1:      N₂ + O₂ → 2NO

2:     2NO + O₂ → 2NO₂

complete reaction:

N₂ + 2O₂ → 2NO₂

In both intermediate equations' oxygen is used as reactant because the end product is the product of the combination of nitrogen and oxygen. So in the  complete or overall reaction, oxygen should also be placed as reactant.

We can not place oxygen at the side of products neither we can cancel it because, products can only be obtained at the end of the reaction but according to the equations' oxygen is not the end product of the reaction. But the addition into the reaction (Eq. 2) to make the new product.

Also, we can not cancel it because to cancel out molecules of oxygen should be present at the both sides with same amount in the stoichiometric equation.

Hence, in a balanced chemical equation, oxygen should be written as a reactant by using the correct number of moles.

10. A laboratory experiment requires that
exactly 3 mL of chemical be dispensed into a
test tube. Which piece of equipment would be
MOST appropriate for measuring and
dispensing the chemical?
A another test tube
B a pipette
C a beaker
D a scale balance

Answers

Answer:

B) a pipette

Explanation:

Also known as a graduated pipette, they vary in volume, with most measuring between 0 and 25.0 mL. A small pipette can be used for precise measurement of fluids.

While playing soccer, Caria slides across one of the lines on the field. When she stands up, what base does she stop?
O calcium hydroxide
O ammonium hydroxide
O zinc hydroxide
potassium hydroxide
l

Answers

Answer:

Canxi hydroxit

Explanation:

Answer:

A- calcium hydroxide

Explanation:

Got it right on Edge.

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