Must new substances be formed when you observe a chemical property explain

QUESTION POSTED AT 14/02/2020 - 01:11 PM

Answered by admin AT 14/02/2020 - 01:11 PM

No but a chemical change yes a chemical property is only a characteristic not change
Post your answer

Related questions

Which scenario best describes a chemical change? A. water conducting electricity B.copper pipe being cut into pieces C.copper corroding in the presence of oxygen D.water freezing into ice

It's c because that's what happened to the statue of liberty lol

ANSWERED AT 22/02/2020 - 11:20 PM


QUESTION POSTED AT 22/02/2020 - 11:20 PM

During photosynthesis carbon is converted into which chemical

Carbon dioxide + water ---> glucose +oxygen

ANSWERED AT 22/02/2020 - 11:18 PM


QUESTION POSTED AT 22/02/2020 - 11:18 PM

What are all the properties of water?

Can be in a liquid, gas or solid state...
can vapourise, freeze and boil...
is tasteless and colorless...
hope this helps!

ANSWERED AT 22/02/2020 - 09:27 PM


QUESTION POSTED AT 22/02/2020 - 09:27 PM

Explain the relationship between the number of covalent bonds and bond length

The more covalent bonds the shorter the bond length.  Kinda like doing a shoulder hug vs a bear hug.

ANSWERED AT 22/02/2020 - 06:54 PM


QUESTION POSTED AT 22/02/2020 - 06:54 PM

Which ones can be separated or made into a simpler substance? a. Mixture b. Element c. Compound *please answer each one*

I'm pretty sure it's A.) and C.)

ANSWERED AT 22/02/2020 - 06:22 PM


QUESTION POSTED AT 22/02/2020 - 06:22 PM

Needed for most chemical reactions and makes up of 70% of cells. A. Water B. Air C. Food D. Living space E. Carbohydrates

C.water water is the most important,There are tens of thousands of different types of chemical reactions and interactions going on everywhere in the body all the time. Every one of these  requires water to be present.

ANSWERED AT 22/02/2020 - 06:20 PM


QUESTION POSTED AT 22/02/2020 - 06:20 PM

Please help me! Water is treated to replace harmful chemicals, and bacteria so people can then drink it. True or false?

It is true. Untreated water can carry harmful diseases like E. coli. It is treated to clean it of toxins. 

ANSWERED AT 22/02/2020 - 06:18 PM


QUESTION POSTED AT 22/02/2020 - 06:18 PM

Magnesium oxide decomposes into magnesium and oxygen. if 12.09 g of magnesium oxide decomposes to form 7.29 g of magnesium, what mass of oxygen gas is also released in the reaction?

 the mass of oxy gas would be 4.03 did i calculate that right?

ANSWERED AT 22/02/2020 - 05:42 PM


QUESTION POSTED AT 22/02/2020 - 05:42 PM

Sulfur has an atomic number of 16. how many covalent bonds can sulfur form?

Two because it has six electrons in it's valence shell and it still has space for two more

ANSWERED AT 22/02/2020 - 05:35 PM


QUESTION POSTED AT 22/02/2020 - 05:35 PM

Scavengers break down wastes into simple, organic substances. a. true b. false

A. true
A scavenger is an organism that mostly consumes decaying biomass, such as meat or rotting plant material. Many scavengers are a type of carnivore, which is an organism that eats meat. While most carnivores hunt and kill their prey, scavengers usually consume animals that have either died of natural causes or been killed by another carnivore.

ANSWERED AT 22/02/2020 - 05:33 PM


QUESTION POSTED AT 22/02/2020 - 05:33 PM

How many grams of hydrogen gas would be needed to form 8.0 grams of water? H2+O2=H2O

16 atoms of hydrogen and 8 atoms of oxygen

ANSWERED AT 22/02/2020 - 04:53 PM


QUESTION POSTED AT 22/02/2020 - 04:53 PM

Which of the following statements correctly explains the relationship between humidity and temperature? The higher the temperature, the lower the humidity. The higher the temperature, the higher the humidity. The lower the temperature, the higher the humidity. Temperature does not affect humidity.

Well look at texas for example, its pretty hot and the humidity is quite high so id say the correct answer would be the higher the temperature the higher the humidity
hope its correct :)

ANSWERED AT 22/02/2020 - 04:26 PM


QUESTION POSTED AT 22/02/2020 - 04:26 PM

Did any conductor have a different effect on the light bulb than the others? Explain.

No they didn't have a different effect on the light bulb

ANSWERED AT 22/02/2020 - 04:19 PM


QUESTION POSTED AT 22/02/2020 - 04:19 PM

20 POINTS!! Match the alien matters with the correct on on earth: Periodic Table Group 1 Group 2 Group 13 Group 14 Group 15 Group 16 Group 17 Group 18 1 H/Gs 1.008 2 He/ 4.003 3 Li/ 7.941 4 Be/ 9.012 5 B/ 10.811 6 C/ 12.010 7 N/At 14.006 8 O 15.999 9 F/ 18.998 10 Ne/ 20.179 11 Na/So 22.989 12 Mg/ 24.305 13 Al/Lm 26.981 14 Si/ 28.085 15 P/ 30.973 16 S/ 32.065 17 Cl/Ms 35.453 18 Ar/ 39.948 19 K/ 39.098 20 Ca/ 40.007 Skip 21 - 30 31 Ga/ 69.723 32 Ge 72.64 33 As/ 74.921 34 Se/ 78.96 35 Br/ 79.904 36 Kr/ 83.8 METALS METALLOIDS NONMETALS **Galactic Element Clues** The clues in red have already been matched for you. Use those to guide you on your mission! Gasium (Gs): This is the element with the lowest atomic mass number in the universe. Luminesium (Lm): This element is a metal that is not very reactive and has a pretty low atomic mass number. When we round the atomic mass number up to 27, we find that an atom of this element has 14 neutrons in its nucleus. Mustarium (Ms): This is a nonmetal, gas that is very reactive and is toxic when the aliens inhale it. Its average atomic mass is about 35 amu. Atmospherium (At): The alien’s notices that this is the most abundant element found in the Earth’s atmosphere. Its atoms contain 7 protons and 7 neutrons. Softium (So): This is a soft metal that can be cut with a dull knife, but it can be very explosive when exposed to water. It has an atomic mass of 23 amu. Directions: Match the following Galactic Element clues to the Periodic Table above Fireworkium (Fw): This element has 15 protons and 15 electrons in its neutral atom. Toothium (T): This is a nonmetal with an average atomic mass number close to 19. Floatium (Fl): This is a gas that the aliens often use to fill balloons and blimps. It contains two protons in its nucleus. Breathium (Bt): This element is a nonmetal and has one less proton than an atom of Toothium and has an atomic mass close to 16 amu. Lightium (Lg): This is a gas that does not react with other elements. It glows when it is heated in a lamp or vacuum tube. It contains one more proton in its nucleus than Toothium. Rottoneggium (Re): This is a nonmetal with one less electron than Mustarium. It has a total of 16 electrons in its electron cloud. Nobelium (Nb): This gas is located directly below Lightium on the periodic table and has an atomic mass close to 40 amu with 18 protons. Liquidium (Lq): This is a nonmetal and has the second largest atomic mass number on the alien periodic table. Supermanium (Sp): This element has the largest atomic mass unit on the alien’s periodic table at close to 84 amu. Bonsium (Bo): This element is important for bone strength, both for aliens and earthlings. It is a metal in Group 2 of the periodic table and has 20 neutrons. Organium (Or): This element makes up diamonds, which are not as valuable in other places in the universe as they are on Earth. It contains six protons in the nucleus of its atom. Killum (Ki): This is a notoriously poisonous metalloid with an atomic mass close to 75 amu. Universium (Uv): This is a heavy nonmetal, a pretty large atomic mass number and chemical properties similar to Rottoneggium and Breathium. Semicoductium (Sc): This element is the metalloid with the lowest mass. It has one less proton than Organium. Computerium (Co): This is an element that the aliens use in their electronics, stun guns, and in their communication devices because it is a semi-conductor. Its mass is significantly greater than the mass of Semicoductium and it has 14 electrons. Ikium (Ik): This is a semi-conductor that is found below Computerium on the periodic table. The element has 32 protons and 41 neutrons. Spriklium (Sk): An atom of this element may have an actual mass of 70 amu with 39 neutrons. Alloyium (Am): This is a relatively rare metal that is often used as a hardening agent in metal alloys/mixtures. It is the second lightest metal on the periodic table. Metium (Me): This is a very reactive metal with the lowest mass of all the metals on the entire periodic table. Bananium (Bn): This element has similar chemical properties to Softium and Metium, but is heavier than both. Abundium (A): This is the ninth most abundant element in the universe. It is a metal with 12 protons in its nucleus. 20 POINTS!!!

H=Gs, Li=Me, Na=So, K=Bn, Be=Am, Mg=A, Ca=Bo, B=Sc, Al=Lm, Ga=Sk, C=Or, Si=Co, Ge=Ik, N=At, P=Fw, As=Ki, O=Bt, S=Re, Se=Uv, F=T, Cl=Ms, Br=Lq, He=Fl, Ne=Lg, Ar=Nb, and Kr=Sp.


ANSWERED AT 22/02/2020 - 04:19 PM


QUESTION POSTED AT 22/02/2020 - 04:19 PM

Charles’ law explains which of these phenomena? A. why a balloon deflates when the air around it cools B. why solids require heat in order to change into gases C. why the pressure of a gas increases when volume decreases D. why some gases only react with each other at high temperatures

The correct answer is A. why a balloon deflates when the air around it cools

Explanation:

According to Charles' law, in gases the temperature and volume are related, in this way the volume of a gas increases if these are heated or if the temperature rises and in the same way the volume of a gas decreases as the temperature falls. This law explains "why a balloon deflates when the air around it cools" because this shows the gas in the balloon reduces its volume and therefore deflates when the temperature decreases, which shows the relationship between temperature and volume described in Charles' law.

ANSWERED AT 22/02/2020 - 03:39 PM


QUESTION POSTED AT 22/02/2020 - 03:39 PM

Which characteristic is different in archaea than in bacteria? A. shape of cell B.flagella forlocomotion C. chemical makeup of the cell wall D.pili for attaching to the surface

I just had this question myself. I believe the answer is A

ANSWERED AT 22/02/2020 - 03:25 PM


QUESTION POSTED AT 22/02/2020 - 03:25 PM

The production of low-carbon steel uses oxygen but the production of titanium uses argon. Explain why

for low-carbon steel oxygen is needed to oxidise carbon
-for titanium an atmosphere of argon is used because it is unreactive
-any oxygen would oxidise titanium

ANSWERED AT 22/02/2020 - 03:15 PM


QUESTION POSTED AT 22/02/2020 - 03:15 PM

Which of the following substances have polar interactions (dipole-dipole forces) between molecules? F2, Cl2, ClF, NF3

Answer:

Explanation:

The covalent bond is the chemical bond between atoms where electrons are shared, forming a molecule. Covalent bonds are established between non-metallic elements, such as hydrogen H, oxygen O and chlorine Cl. These elements have many electrons in their outermost level (valence electrons) and have a tendency to gain electrons to acquire the stability of the electronic structure of noble gas. The shared electron pair is common to the two atoms and holds them together.

Electronegativity is defined as the ability of an element to attract the electrons that link it to another element.

The covalent bond between two atoms can be polar or nonpolar.

When two atoms have different electronegativities, the one with the highest electronegativity will attract the electrons towards each other, giving rise to two opposite charges on the bond. That is, this generates that in a polar molecule there is separation between positive and negative charges. The bonds will be all the more polar the greater the difference in electronegativity between the bound atoms.

On the other hand, the non-polar covalent bond occurs between atoms of the same element or between atoms with very little electronegativity difference. It is thus characterized to molecules or bonds that do not exhibit any polarity.

A molecule is a dipole when there is an asymmetric distribution of electrons because the molecule is made up of atoms of different electronegativity. That is, dipole is formed when the molecule is polar.

So, dipole-dipole forces are forces of attraction between polar molecules. These molecules attract when the positive end of one of them is close to the negative of the other.

Given the above, F₂ and Cl₂ are non-polar molecules and ClF and NF₃ are polar molecules. Then ClF and NF₃ have polar interactions (dipole-dipole forces).

ANSWERED AT 22/02/2020 - 01:33 PM


QUESTION POSTED AT 22/02/2020 - 01:33 PM

Salt dissolving in water is what type of property?

It is a physical change because it could be turned back to just water or just salt through evaporation. 

ANSWERED AT 22/02/2020 - 12:42 PM


QUESTION POSTED AT 22/02/2020 - 12:42 PM

Which properties result from minimal interactions between molecules in a gas?

The liquids so play tank i am just completing my sdgsgr

ANSWERED AT 22/02/2020 - 12:26 PM


QUESTION POSTED AT 22/02/2020 - 12:26 PM

Which event represents a chemical change? A. breaking glass B. chopping wood C. crushing a can D. milk turning sour 99 points please hurry i really need help!!!!! Thanks!

The answer is D. Milk turning sour

A. breaking glass
B. chopping wood
C. crushing a can
D. milk turning sour

Have a nice day! :)

ANSWERED AT 22/02/2020 - 12:23 PM


QUESTION POSTED AT 22/02/2020 - 12:23 PM

What causes clouds to form on the upwind side of mountain ranges

The encounter of air and mountain range causes the formation of clouds.

Air in mountain ranges will rise and become cool. It will no longer be able to hold on to the water vapor it had collected. The excess water vapor will condense by becoming liquid water droplets that forms into a cloud. 

Clouds formed in mountain ranges are usually stratus clouds and lenticular clouds.

ANSWERED AT 22/02/2020 - 06:28 AM


QUESTION POSTED AT 22/02/2020 - 06:28 AM

Carbon monoxide (co) reacts with hydrogen (h2) to form methane (ch4) and water (h2o).co( g. 3h2( g. <-------> ch4( g. h2o( g.the reaction is at equilibrium at 1,000 k. the equilibrium constant of the reaction is 3.90. at equilibrium, the concentrations are as follows.[co] = 0.30 m[h2] = 0.10 m[h2o] = 0.020 mwhat is the equilibrium concentration of ch4 expressed in scientific notation? a.0059b.) 5.9 x 10-2c.) 0.059d.) 5.9 x 102

The correct answer for this question is this one: d. 5.9 x 10^2
The reaction is at equilibrium at 1,000 k. the equilibrium constant of the reaction is 3.90. at equilibrium, the concentrations are as follows.[co] = 0.30 m[h2] = 0.10 m[h2o] = 0.020 m

The equilibrium concentration of ch4 expressed in scientific notation is
a. 0059
b. 5.9 x 10^-2
c. 0.059
d. 5.9 x 10^2


Hope this helps answer your question and have a nice day ahead.

ANSWERED AT 22/02/2020 - 02:43 AM


QUESTION POSTED AT 22/02/2020 - 02:43 AM

Assuming that the smallest measurable wavelength in an experiment is 0.730 fm (femtometers), what is the maximum mass of an object traveling at 927 m·s–1 for which the de Broglie wavelength is observable?

1 fm = 1.0 × 10-15 meters 
so
0.610  fm x (1.0x10^-15 m / 1 fm)
                   = 6.1x10^-16 m

so the formula is
λ = h / mu 
so,
as we know mass value so by putting
m = (6.626*10^-34)/(6.1*10^-16*199)
    =
(6.626*10^-34)/(1213.96*10^-16)
    = 5.45 x 10^ -21 
hope thats an answer for you

ANSWERED AT 22/02/2020 - 12:48 AM


QUESTION POSTED AT 22/02/2020 - 12:48 AM