You were tasked to check if the liquid sample you have is a substance or a
mixture. Which among these tests is the BEST way to do so?l.color comparizon
lltaste comparizon
III. Boiling Test
IV. Melting Test
a.I, II, III and IV. b.l,II, and III only
c. I and Ill only
d. I, II, and IV only
Answer:
The correct answer is - option C. I and Ill only.
Explanation:
One never tastes a unknown chemical in chemistry lab especialy a liquid that can be hazardous. Melting test is for solid as a solution is already a liquid state so melting test can not be perform on it.
The two test can be perform on given sample that are color comparison and boiling test to check if it is substance or a mixture. A misture is prepared from mixing different kind of compounds that can give different kind of color while a particular substance give a uniform color always or remain colorless.
Boiling test can be helpful in distinguish a mixture from a substance as a particular sybstance always give a particular boiling point but mixture can be varry and depend of the coponents mixed together
what is the ion name of Zinc?
Answer:PubChem CID: 32051
Explanation:Molecular Formula: Zn+2
Synonyms:
zinc ion
zinc(2+)
Zinc cation
Zinc, ion (Zn2+)
Zn2+
More...
Molecular Weight:
65.4 g/mol
Dates:
Modify:
2020-10-20
Create:
2005-06-08
helppp What function does adding a coefficient in a chemical equation serve?
Coefficients cannot be added or changed without describing different substances.
It tells whether the reactants must be exposed to outside factors to make them react.
It balances the equation, ensuring each side of the reaction has an equal number of atoms.
It describes the physical state of the reactant or product to which it is attached.
Answer: The answer is option C. (It balances the equation, ensuring each side of the reaction has an equal number of atoms.)
Explanation:
pleasee help asap pleasee
Answer:
b.) 100 meters c.) 6 seconds d.) 16.6 e.) 16.6m/s
Explanation:
which layer of Earth creates a magnetic field and shields us from the Sun's destructive solar wind?
The outer core is the layer of Earth creates a magnetic field and shields us from the Sun's destructive solar wind.
It is called a magnetic field to a space in which magnetic phenomena take place due to the influence of a body with properties of electric charges.
The earth's magnetic field is mainly produced by the electric currents that occur in the outer core, liquid in nature, which is composed of highly conductive cast iron.
As the center of the Earth cools, part of the iron contained in the fluid outer core solidifies and becomes part of the inner core.
The outer core changes its chemical composition and becomes less dense, generating convective currents.
This process, together with the Coriolis effect (product of the Earth's rotation) generates strong helical convection currents that align with the axis of rotation.
The Earth is mostly protected from the solar wind, a stream of energetic charged particles emanating from the Sun, by its magnetic field, which deflects most of the charged particles.
These particles would destroy the ozone layer, which protects the Earth from harmful ultraviolet rays.
Therefore, we can conclude that the outer core is the layer of Earth creates a magnetic field and shields us from the Sun's destructive solar wind.
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2.0 moles of sodium (Na) would have a mass of-
A) 0.087 grams
B) 46 grams
C) 1.2 x 10^24 grams
D) 3.3 x 10^-24
Please help hurry
Pleas help me
Answer:wait nvm i was right its zirconium
the answer should be zirconium
Complete the equation for the conversion of sucrose into glucose
(1)C12H22O11 + H2O
Answer:
C₁₂H₂₂O₁₁ + H₂O → C₅H₁₂O₆ + C₆H₁₂O₆
Explanation:
Chemical equation:
C₁₂H₂₂O₁₁ + H₂O → C₅H₁₂O₆ + C₆H₁₂O₆
Source of sucrose:
Sucrose is present in roots of plants and also in fruits. It is storage form of energy. Some insects and bacteria use sucrose as main food. Best example is honeybee which collect sucrose and convert it into honey.
Monomers of sucrose and hydrolysis:
Sucrose consist of monomers glucose and fructose which are join together through glycosidic bond. Hydrolysis break the sucrose molecule into glucose and fructose. In hydrolysis glycosidic bond is break which convert the sucrose into glucose and fructose. Hydrolysis is slow process but this reaction is catalyze by enzyme. The enzyme invertase catalyze this reaction.
The given reaction also completely follow the law of conservation of mass. There are equal number of atoms of elements on both side of chemical equation thus mass remain conserved.
what does the o in chemistry mean?
Answer:
oxygen
Explanation:
periodic table
Determine the number of liters in a 355 milliliter can of soda.
Ans: 0.355 L
If an element has atoms, in their ground-state, with 6 valence electrons, the element could be: (check all possible answers)
Answer:
You included no options however the elements with 6 Valence electrons are;
Oxygen ⇒ OSulfur ⇒ SSelenium ⇒ SeTellurium ⇒ TePolonium ⇒ Polivermorium ⇒ UuhValence electrons refer to the electrons an element has on its outermost shell. The number of these electrons determines the charge that an electron will carry as it seeks stability.
It also determines which group the element will be in in the Periodic table. Elements with 1 valence electron for instance will be in Group 1 and elements in Group 16 will have 6 valence electrons.
g The difference between an ionic bond and a covalent bond is that Select one: a. ionic bonds commonly occur between two metals and covalent bonds occur between metals and nonmetals. be. ionic bonds are between atoms that can share electrons; covalent bonds are between atoms that will donate/accept electrons. c. covalent bonds come about because of a sharing of electrons; ionic bonds do not. d. ionic bonds are between smaller atoms; covalent bonds are between large atoms.
Answer:
C) Covalent bonds come about because of a sharing of electrons; ionic bonds do not.
Explanation:
There are two main types of chemical bonds- covalent and ionic/electrovalent bonds.
Ionic bond: Ionic or electrovalent bonds are characterized by the transfer of electrons from electropositive atoms (metals) to electronegative atoms (non-metals). The metal atoms after donating their electrons become positively charged ions (cations) while the non-metal atoms after accepting electrons become negatively charged ions (anions). Strong electrostatic forces of attraction constitutes ionic bonds.
Covalent bond: Covalent bonds are formed by the sharing of electrons by the atoms involved in the bond; usually between atoms of comparable electronegativities or atoms of the same element. The shared electrons are contributed by each of the atoms involved in the bonding or may be contributed by only one of the atoms. In covalent bonding, molecules rather than ions are formed.
convert each into decimal form.
a) 1.56× 10^3
b) 0.56×10-4
Answer: A = 1560
B = 1.6
Explanation: brainlest please
Why can't silver have a mass number of 107.87?
Answer:
Silver does have a mass of 107.87.
Explanation:
A venus fly trap snaps shut when a fly lands on the trigger hairs inside its trap.
Which characteristic of life does this represent?
reproduction
A. cell organization
B. heredity
C. response to environment
Answer:
C. Response to environment
pouring cold water in your hot coffee is
conduction
convection
radiation
Pouring cold water into your hot coffee is convection. Therefore, option B is correct.
What is convection?Convection can be explained as the transfer of heat from one place to another because of the movement of fluid. Convective heat transfer can be defined as the combined processes of conduction and advection.
Gases as well as liquids are not good conductors of heat under normal pressure and temperature conditions, but they can easily transfer heat from one region to another region.
Convection takes place through diffusion but does not take place in solids substances, as there is no movement of constituent particles takes place. The diffusion of heat energy that occurs in solids is called thermal conduction.
Heat energy transfer that takes place between a surface and a liquid when they come in contact with the surface is called convection heat transfer. Therefore, heat transfer takes place through convection when pouring cold water into hot coffee.
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J.J. Thomson discovered the electron in 1897. In 1904, he proposed a model of an atom, describing that there was an equal distribution of negative and positive charges throughout the atom. In 1909, Ernest Rutherford tested J.J. Thomson’s model by shooting positive particles at gold foil. Based on Thomson's model, it was predicted that the particles would fly through the foil with a small amount deflected back. Analyzing the results, Rutherford discovered that more of the particles bounced back than expected. Which of the following best explains how the results of Rutherford’s experiment affected Thomson’s widely-accepted atomic model?
A. Rutherford’s results were invalidated and discarded because Thomson’s model was correct.
B. Rutherford’s results supported parts of Thomson's model, but also provided new data and interpretations.
C. Rutherford’s results suggested that the model proposed by Thomson was based on false research and required a change in his hypothesis.
D. Rutherford’s results supported Thomson’s model that there was a negative core surrounded by positive charges and caused a modification in the overall atomic theory.
Rutherford's results declined the results of Thomson's model, the correct option is C.
What are Atomic models?Atomic Models are the scientific theories proposed to determine the structure of an atom.
There are mainly 5 theories proposed for atomic models.
1. John Dalton's Atomic Model: An atom is the basic building block of all physical entities in the universe.
2. Plum Pudding Model, created by J.J. Thomson, uses the comparison of plum pudding, where the positive charge is uniformly dispersed throughout and the negative charge is randomly sprinkled on top, to explain how subatomic particles are structured.
3. Rutherford's model: proved the presence of a nucleus.
4.Niel Bohr's model: Arrangement of electrons in shells.
5. Erwin Schrodinger's model is also called as Quantum Model.
In J.J. Thomson's model, the equal distribution of positive and negative charges is proposed while,
Rutherford's theory declines this arrangement and proposes that the positively charged nucleus occupies a very small part and there is empty space in the atom.
So, Rutherford’s results suggested that the model proposed by Thomson was based on false research and required.
To know more about Atomic Models
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2. What is the formula to calculate speed?
Answer:
s=d/t
s=speed
d=distance traveled
t=time elapsed
why do we study properties of matter
Answer:
The properties of matter include any traits that can be measured, such as an object's density, color, mass, volume, length, malleability, melting point, hardness, odor, temperature, and more. We need to study all these traits since every single object around us, including us, is made of matter. Without matter we wouldn't exist; it would be infinite darkness everywhere.
Helppppp pleaseee fasst What branch of mathematics' principles were the Islamic artists apparently using?
a. Calculus
C. Trigonometry
b. Quasicrystalline geometry
d. Algebra
Please select the best answer from the choices provided
Answer:
its b.
Explanation:
What functional group is present in the following compound?
Describe the porosity and permeability of Antarctic soil.
Answer:
Explanation: Geography · College. +5 pts ... Answer. 1.9/5. 16. Girly1004. Ambitious. 1 answer. 4 people helped ... are places that show evidence of a massive ice sheet that existed around 250 million years ago.
58:27
1
Dominic made the table below to organize his notes about mixtures
Properties of Mixtures
has no set composition
must have more than one state of matter
must have more than one substance
What mistake did Dominic make?
The title should read "Properties of Solutions" because some mixtures do not have all of the properties listed
O There is a definite recipe to make each mixture, so the composition of a mixture is set.
Although it is possible to have more than one state, it is also possible to have only one state.
O A single substance can be used to make a mixture if the substance is composed of more than one element
Sao and Fit
Answer:
Although it is possible to have more than one state, it is also possible to have only one state.
Explanation:
The mistake Dominic made was stating that "although it is possible to have more than one state, it is also possible to have only one state."
Mixtures are impure substances with the following properties:
They have an indefinite composition
Their constituents retains their identities.
Constituents react differently to changed conditions.
They can easily be separated into constituents by physical methods.
There are two types of mixtures based on the number of phases coexisting:
Homogeneous mixtures have their constituents existing in just one phase.
Heterogeneous mixtures exists in at least two different phases.
Explanation:
A ______________________ is required to cause atoms to bond together or be separated from one another. *
a physical change
b phase change
c radioactive decay
d chemical reaction
Answer:
d chemical reaction..
state and explain grahms law of diffusion
Answer:
Graham's law of effusion was formulated by Scottish physical chemist Thomas Graham in 1848. Graham found experimentally that the rate of effusion of a gas is inversely proportional to the square root of the mass of its particles. This formula can be written as: , where: Rate₁ is the rate of effusion for the first gas.
Explanation:
r1 = rate of effusion for gas 1
r2 = rate of effusion for gas 2
M1 = molar mass of gas 1
M2 = molar mass of gas 2
the following chemical equation is not balanced; which element is not following following the law of mass conservation?
C02+CL2 = O2+CCL4
Answer:
C02+2CL2 = O2+CCL4
Explanation:
the co2 gave its carbon atom to the CL2 + CCL4
An unknown compound containing only C and H was burnt, yielding 10.2 g of CO2 and 6.3 g of H2O. With a molecular weight of about 30, what is the molecular formula?
Answer:
[tex]C_2H_6[/tex]
Explanation:
Hello.
In this case, we can see that the mass of carbon of the unknown compound comes from the yielded mass of carbon dioxide, thus, we compute the moles of carbon as follows:
[tex]m_C=10.2gCO_2*\frac{1molCO_2}{44gCO_2}*\frac{1mol C}{1molCO_2}=0.232 molC[/tex]
Moreover, the mass of hydrogen comes from the yielded water, therefore we can also compute the moles of water:
[tex]m_H=6.3gH_2O*\frac{1molH_2O}{18gH_2O}*\frac{2molH_2}{1molH_2O} =0.7molH[/tex]
Then, to find the subscripts in the empirical formula, we divide by the moles of carbon as the smallest:
[tex]C:\frac{0.232}{0.232}=1\\ \\H:\frac{0.7}{0.232}=3[/tex]
Whose molar mass is:
[tex]M_{CH_3}=12+1*3=15g/mol[/tex]
Thus, the ratio of the molecular formula to the empirical formula is:
[tex]\frac{30}{15}=2[/tex]
Therefore, the molecular formula is twice the empirical formula:
[tex]C_2H_6[/tex]
Which is actually ethane.
Regards.
Explain the difference between the reactants and
products of a chemical reaction.
MP
Answer:
HOPE THIS HELPED :) good luck! ❤️
Explanation:
A reactant is a substance that is present at the start of a chemical reaction. The substance to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.
Answer:
Reactants are the starting substances and products are the ending substances in a chemical reaction. The atoms in reactants are arranged one way and are rearranged in a different way to form the products (in other words, reactants are chemically different from products). The properties of reactants differ from the properties of products.
Explanation:
Sample response on Edge 2021
What tool do scientists use to classify animals?
Scientists use a two-name system called a Binomial Naming System. Scientists name animals and plants using the system that describes the genus and species of the organism. The first word is the genus and the second is the species.
Help!!!
A. A halogen
B. An alkaline earth metal
C. An alkali metal
D. A transition element
Answer:
B?
Explanation: