Answer:
a
Explanation:
Homogenized milk is a colloid. It has been treated to prevent its different components from separating when it stands. When non-homogenized milk stands, the cream rises to the top because it is less dense than the rest of the milk. Which type of mixture is non-homogenized milk? Explain your answer.
Answer:
Heterogeneous mixture
Explanation:
A homogeneous mixture is defined as a mixture in which the constituents of the mixture are uniformly distributed. A typical example of a homogeneous mixture is when a salt is dissolved in water.
A heterogeneous mixture refers to a kind of mixture whereby the composition of the mixture is not uniform. A typically example of a heterogeneous mixture is non-homogenized milk.
Since non-homogenized milk is not homogeneous, the cream rises to the top and separates from the rest of the mixture because the emulsion has not been stabilized. However, homogenized milk is just milk whose emulsion has been stabilized the cream does not separate when left to stand.
Which of the following statements explains why the bond in
hydrogen chloride (HCI) is polar covalent?
o The diameter of a chlorine atom is greater than that
of a hydrogen atom.
o The atomic mass of chlorine is greater than that of
hydrogen.
o The number of valence electrons in a chlorine atom
is greater than that in a hydrogen atom.
o The electronegativity of chlorine is greater than that
of hydrogen.
Answer:
The atomic mass of chlorine is greater than that of hydrogen
Convert 4.0 moles of N2 gas to liters.
Convert 4.0 moles of N2 gas to liters.
Answer :-1mole = 22.4 lts of any gas
unitary method :-
so we can say 4 moles = 4 × 22.4 lts of gas
4 moles of N2 gas = 89.6 lts of N2 gas
The temperature of aluminum increases from 30.0 to 38.0 °C and absorbed 900.J. Calculate the mass of aluminum used if the specific heat is 0.902 J/gK.
please help!!!!
Answer:
The mass of aluminum is 124.72 g
Explanation:
Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
Sensible heat is the amount of energy that causes a change in the temperature of a substance. In other words, sensible heat is that heat that causes the temperature of an object to vary without affecting its molecular structure and therefore its physical state. Its mathematical expression is:
Q = c * m * ΔT
where Q is the heat exchanged by a body of mass m, constituted by a substance of specific heat c and where ΔT is the variation in temperature.
In this case:
Q= 900 Jc= 0.902 [tex]\frac{J}{g*K}[/tex]m= ?ΔT= Tfinal - Tinitial= 38 °C - 30°C= 8°C as it is a temperature difference, it is indistinct if the temperature is expressed in ° C or ° K because the difference will be the same. So: ΔT= 8°C= 8 °KReplacing:
900 J= 0.902 [tex]\frac{J}{g*K}[/tex] *m* 8 °K
900 J= 7.216 [tex]\frac{J}{g}[/tex] *m
[tex]\frac{900 J}{7.216\frac{J}{g} } =m[/tex]
124.72 g=m
The mass of aluminum is 124.72 g
What is the most reliable measurement for the quantity of matter?
Answer:
Answer is: mass.
Explanation:
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What is another name for green algae?
A. ferns
B. Chlorophyta
C. bryophytes
D. hornworts
Chlorophyta is another name for green algae.
What is green algae?Green algae is a large and diverse group of photosynthetic organisms that are typically green in color due to the presence of chlorophyll. They are found in a variety of habitats, including freshwater, saltwater, and moist terrestrial environments.
Chlorophyta is a phylum of green algae, which are photosynthetic eukaryotic organisms. They are commonly found in freshwater, but can also be found in marine and terrestrial habitats.
Chlorophyta are characterized by their green pigmentation due to the presence of chlorophyll a and b, as well as other accessory pigments.
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Answer:Chlorophyta
Explanation:
What is standard volume
Answer:
brainliest plls
Explanation: The volume of an ideal gas at standard temperature and pressure: 22.414 liters.
Which of the following is the balanced chemical equation for photosynthesis? a. 6H2O 6CO2 → 6O2 C6H12O6 b. C6H12O6 6O2 → 6H2O 6CO2 c. H2O CO2 → O2 C6H12O6 d. C6H12O6 O2 → H2O CO2.
Which organism is part of Kingdom Fungi? ciliates lichen paramecium slime molds
Answer:
Slime.
Once upon a time, slime was part of the fungi kingdom. Now it's not, according to experts.
Hope this helps!
When an electric current is passed through an electrolytic cell, how can we recognise that electrolysis is taking place?
when electric current is passed through an electrolytic cell we can recognise that electrolysis is taking place by :
*there may bubbles of different gases formed on the electrodes.
*if we add vinegar or lime juice we find more bubbles forming
by the we can identify
Hemophilia is a genetic blood disorder. The female parent must carry one copy of the gene for the child to inherit hemophilia. Also, males have a greater probability of getting hemophilia than females.
HELP PLZ
Which type of trait is hemophilia?
sex-linked recessive
multiple allele
environmental
dominant
Answer:
Sex-linked recessive
Explanation:
Male's have a higher chance of getting it than female's just like red-green color blindness.
Answer:
A.
Explanation:
Gravity affects the of an object but not its .
Answer:
weight, mass
Explanation:
Gravity affects the weight of an object but not its mass. Your body's weight can change on different planets, but your mass will ALWAYS stay the same.
Answer:
Gravity affects the weight of an object but not its mass.
Explanation: plato :3
Hope this helps!
Which statement best describes how chemical equations demonstrate conservation of mass?
Lavoisier's Law states:
'Mass is neither created nor destroyed' in chemical reactions.
What is the reason of formation of millions of organic compound
The compound ammonium bromide is a strong electrolyte. Write the reaction when solid ammonium bromide is put into water:
Answer:
NH4+ + H2O ==> NH3 + H3O+
Explanation:
Ammonium bromide, NH4Br, is the ammonium salt of hydrobromic acid. The chemical crystallizes in colorless prisms, possessing a saline taste; it sublimes on heating and is easily soluble in water.
What is energy, and what is its unit of measure?
Answer:
Energy is measured in joules. And it is a derived unit. An example that you use in energy is horsepower.
On the web an easy definition: Kinetic energy is motion; it is the motion of waves, electrons, atoms, molecules, substances, and objects.
Also, everything consists of energy. For example, when you turn a page from a book, that is using energy. Or when a ball is rolling down a ramp, it is using kinetic energy. You can also have potential energy, which is the energy stored in something when it isn't moving. For example, when the ball is about to roll on the ramp, it is in its starting point with potential energy.
And finally elastic energy:
Elastic energy is the mechanical potential energy stored in the configuration of a material or physical system as it is subjected to elastic deformation by work performed upon it. Elastic energy occurs when objects are impermanently compressed, stretched or generally deformed in any manner.
For example, an elastic string. When you stretch it, it is the potential anergy stored in the string you are stretching. When you release it, it flies in the air and changes to kinetic energy.
Answer:
Energy is the ability to do work (Quantitative property that must be transferred to an object to perform work on)
Measured in Joule(s)
What is the pH of a solution with a concentration of 0.01M hydrochloric acid?
Now
[tex]\\ \sf\longrightarrow pH=-log[H^+][/tex]
[tex]\\ \sf\longrightarrow pH=-log10^{-2}[/tex]
[tex]\\ \sf\longrightarrow pH=2[/tex]
what makes up a molecule of oxygen gas?
Answer:
2 oxygen atoms make oxygen gas
A molecule of oxygen gas is composed of two oxygen atoms chemically bonded together. The symbol for oxygen is "O," and the atomic number is 8, indicating that each oxygen atom has 8 protons in its nucleus.
A covalent bond is a type of chemical bond that occurs between two atoms when they share one or more pairs of electrons. It is a strong bond that holds atoms together to form molecules.
In a covalent bond, atoms share electrons in order to achieve a more stable electron configuration, typically by filling their outermost energy levels (valence shells). By sharing electrons, both atoms involved in the bond can achieve a more stable configuration, similar to the noble gas configuration.
In an oxygen gas molecule, the two oxygen atoms are held together by a covalent bond. Covalent bonds involve the sharing of electron pairs between atoms. In the case of oxygen gas, each oxygen atom shares two electrons with the other oxygen atom, resulting in a stable molecule.
Therefore, a molecule of oxygen gas is made up of two oxygen atoms (O) bonded together by a covalent bond.
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1. Who conceived of an atomic model in which positive and negative particles were mixed together throughout the entire atom?
What is the mass of an object if its density is 12.3 g/ml and it has a volume of 25 ml?
[tex]density \: = \frac{mass}{volume} [/tex]
mass = 12.3 × 25
= 307.5
approximately = 308 g
Carbon burns in the precence of oxygen to give carbon dioxide.which element equation describes the reaction
Answer:
not going to lie... i suck at science
Explanation:
sorry
Fluorine,chlorine and bromine are all in the same group (group7) of the periodic table because they ______ in a similar way
What are two external structures that help a frog survive?
Answer:
muscular jumping leg (helps them escape predators, chase after prey), webbed foot (helps them live in both aquatic and land environments), and they can store poison (that is used to attack or defend) in their glands
Explanation:
:)
What air pollutants can result from burning fuelwood?
Answer:
These air pollutants consist of...
Carbon monoxideNitrogen oxidesClimate changeFossil fuelsOrganic compounds. Just because they are organic does not mean they are good for the environment.
Use the oxidation states as indicated by the superscript numbers to answer the questions. k( 1)cl( 5)o3(-2) → k( 1)cl(-1) o2(0) which element is oxidized? which element is reduced? which element does not change in the oxidation state? how many electrons will be moved to have a balanced reaction?
Oxygen gets oxidized and potassium and chlorine get reduced. The number of electrons moving to have a balanced reaction is 6.
What is an oxidation number?The number of allocated elements in a chemical combination is termed an oxidation number. The oxidation number is generally the count of the number of electrons that a molecule or atom shares, loses, or gains during bond formation.
The given chemical equation will be
[tex]\rm 2K ^+ + 2Cl^+ + 2O_3^{2-} = 2KClO_3[/tex]
In this reaction, oxygen gets oxidized and potassium and chlorine get reduced.
The number of electrons moving to have a balanced reaction will be
Number of electron = 2 × 3 = 6
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Answer:
Answer down below
Explanation:
32.2 g of ethyl alcohol is dissolved in water to make a 0.50 L
solution. What is the molarity of the solution?
If 32.2 g of ethyl alcohol is dissolved in 0.50 L water to make a solution, the molarity of the solution will be 1.398 mol/L or 1.398 M
Molarity
The molarity of a solution is the ratio of the number of moles of solutes and that of the volume of solvent in the solution.
Mathematically:
Molarity = number of moles/volume in L
Number of moles of 32.2 g ethyl alcohol = mass/molar mass
= 32.2/46.07 = 0.699 moles
Molarity of the solution = 0.699/0.50
= 1.398 mol/L or 1.398 M
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Which items are true concerning a typical "thermos bottle"?
A. Radiation is hindered by the silver coatings.
B. The silver coatings stop convection losses.
C. Conduction losses are prevented by the vacuum.
D. Convection is not possible because of the vacuum.
E. The glass walls will not conduct heat.
Answer:
A, C, and D!
Explanation:
The items that are true concerning a typical "thermos bottle" are Radiation is hindered by the silver coatings, conduction losses are prevented by the vacuum, and the glass walls will not conduct heat. These are the options A, C, and E.
What is the significance of the radiation?Radiation is significant as it is the movement of heat energy from one place to another and plays a significant role in heat transfer as here in the thermos bottle, the silver coatings on the outside of the bottle help to prevent heat loss due to radiation, and the reflective portions further aid in such a process.
Hence, the items that are true concerning a typical "thermos bottle" are Radiation is hindered by the silver coatings, conduction losses are prevented by the vacuum, and the glass walls will not conduct heat. These are the options A, C, and E.
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1. Find at least 3 elements named after countries
2. Find at least 3 elements named after scientists (and name the scientist)
3. Find 1 element named after a state and 1 after a continent
4. Find 3 elements named after planets
5. Find 1 element that sounds like your name and 1 that sounds like it should be in a comic book
6. Find atleast 5 elements whose symbols do not match their names
7. What is the only letter not appearing on the periodic table as a symbol or part of the symbol?
8. Find the element that makes plumbing pipes. is it a medal, nonmetal or metaloid
9. Find the element that makes glowing signs, what special group is it in?
10. Find the element that makes milk good for your health. is it a metal, nonmetal or metalloid?
Answer:
1. Elements named after Countries or Places
Americium
Am
Made in 1945 at Chicago USA
Berkelium
Bk
Made in 1950 at the University of California, Berkeley, USA
Californium
Cf
Made in 1950 at the University of California, Berkeley, USA
Copper
Cu
The Romans were the biggest users of copper. Their source of copper was the island of Cyprus. Their name for the island was "Cyprium". They called the metal "Aes Cyprium" - metal of Cyprus. The name became shortened to Cyprium which then became "Cuprum" from which copper gains its modern day symbol.
Francium
Fr
Discovered in 1939 at the Curie Institute, Paris, France.
Gallium
Ga
Named after the Latin name for France - Gallia
Germanium
Ge
Discovered in 1886 by a German Chemist - Winkler.
Polonium
Po
Discovered in 1898 by Marie Curie, who was Polish.
Scandium
Sc
Discovered and mined in Scandinavia
Strontium
Sr
Named after Strontian, a small village in the Western Highlands of Scotland.
__________________________________________________________
4. Elements named after Planets
Helium
He
From the Greek word "Helios" - the Sun. In 1868 during an eclipse of the Sun, Scientists observed a spectral line caused by an unknown element. They named the element Helium. Twenty seven years later in 1895, the element was discovered on Earth.
Neptunium
Np
Named after the planet Neptune. Find the position of the three planets Neptune, Pluto, and Uranus in the Solar system. Now find the position in the Periodic Table of the three elements named after these planets...
Plutonium
Pu
Named after the planet Pluto
Uranium
U
Named after the planet Uranus. The element was discovered in 1789, shortly after the discovery of the planet.
Elements named from Mythology
Tantalum
Ta
Named after the Greek mythological king, Tantalus. It was discovered in 1802 and great difficulties were encountered in dissolving its oxide in acid to form salts. It proved to be a tantalizing problem!
Niobium
Nb
Named after Princess Niobe, the daughter of King Tantalus. According to legend, father and daughter were always found together and were very much alike. The two elements Niobium and Tantalum are usually found together in nature and their properties are very similar. Niobium was discovered in North America in 1801 and was originally named Columbium. It was renamed in 1844 after the connections with tantalum was realized. Find the positions of both elements in the periodic table
Thorium
Th
Named after Thor, the Scandinavian God of War and Thunder. It was discovered and named in 1828. Coincidentally, thorium is used today as a nuclear fuel in nuclear weapons and reactors.
Titanium
Ti
Named after Titans, the Greek supermen. Titanium is an extremely strong metal which resists attack by acids.
Vanadium
V
Named after Vandis, the Scandinavian Goddess of Beauty. The salts of vanadium have beautiful colors.
3. Elements named after Famous Scientists
Curium
Cm
Made in 1944 at Chicago. It was named in honor of Marie and Pierre Curie.
Einsteinium
Es
Made in 1952 at the University of California. It was named in honor of Albert Einstein.
Lawrencium
Lw
All of the man-made elements have been made as a result of the Nuclear Age. The majority of these elements were made at the University of California USA, in a machine called the Cyclotron. The Cyclotron was invented by Professor Ernest Lawrence. Lawrencium was made at the University of California in 1961 and named in his honor.
Mendelevium
Md
Made in 1955 at the University of California. It was named after a world famous Russian Chemist Dimitri Mendeleev.
------------------------------------
8. The chemical symbol for lead is Pb, which comes from the Latin word plumbum, meaning "waterworks," referring back to ancient times when the metal was widely used in the construction of water pipes.
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Convert 5.70 Kilograms to milligrams. Show your work!
Answer:
5.7e+6
Explanation:
Multiply the value in kilograms by the conversion factor '1000000'.
So, 5.7 kilograms = 5.7 × 1000000 = 5700000 milligrams.
To convert kilograms to milligrams, we need to remember that there are 1,000 grams in a kilogram and 1,000 milligrams in a gram. From this, 5.70 kilograms is equal to 5,700,000 milligrams.
1 kilogram (kg) is equivalent to 1,000 grams (g). This is a conversion factor that allows us to convert from kilograms to grams.
Additionally, 1 gram (g) is equivalent to 1,000 milligrams (mg). This is another conversion factor that allows us to convert from grams to milligrams.
To convert 5.70 kilograms to milligrams, we can use these two conversion factors:
5.70 kilograms × (1,000 grams / 1 kilogram) × (1,000 milligrams / 1 gram)
First, we multiply 5.70 kilograms by the conversion factor of 1,000 grams / 1 kilogram. This eliminates the kilograms unit and leaves us with grams:
5.70 kilograms × 1,000 grams / 1 kilogram = 5,700 grams
Next, we multiply 5,700 grams by the conversion factor of 1,000 milligrams / 1 gram. This eliminates the grams unit and leaves us with milligrams:
5,700 grams × 1,000 milligrams / 1 gram = 5,700,000 milligrams
Therefore, 5.70 kilograms is equal to 5,700,000 milligrams.
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A 0.250 L sample of chlorine gas is collected at a pressure of 105.3 kPa and a temperature of 505 K. What will the volume be if the pressure changes to 100.3 kPa and the temperature decreases to 495 K?
Answer:
V2 = 0.257 LExplanation:
T1 = 505 K
P1 = 105.3 kPa = 1.04 atm
V1 = 0.250 L
T2 = 495 K
P2 = 100.3 kPa = 0.990 atm
V2 = ?
P1V1/T1 = P2V2/T2 must be changed to T2P1V1/T1/P2495 x 1.04 x 0.250 ÷ 505 ÷ 0.990 = V2
V2 = 0.257 L
So 0.257 L is the answer!!