What is the composition of rocks and how are they formed?
Properties that describe how matter reacts when exposed to other substances or energy
Which of the following is a mixture?
steel
water
oxygen
gold
how many atoms are there in 1.75 moles of CHCl3
Why does a closed system mean that nothing could enter or exit
A closed system permits only energy to enter or exit, not matter.
A closed system is a fundamental concept in physics and chemistry. It is defined as a system where matter cannot enter or exit, but energy can still be exchanged with its surroundings. For instance, consider a beaker covered with a glass lid. While heat can pass through the glass, water vapor cannot escape, thus maintaining the amount of matter inside the beaker constant. This helps in studying various thermodynamic processes without the interference of external matter exchange.
science question hurry please
when a star dies which of these celestial objects is it most likely to help create ?
1 a planet
2 a star
3 a moon
4 a meteor
5 a comet
The correct answer is option 2, that is, a star.
Stars die as they consume all the fuel, which permits a star to go through the process of fusion. A star is formed majorly of helium and hydrogen. Once a star uses all the hydrogen, the star begins to die. When a normal-sized star dies, the core eventually cools into a white dwarf, and then into a black dwarf.
White dwarf refers to a very dense and small star, which is usually of the size of a planet. A white dwarf is produced when a low-mass star has used all its central nuclear fuel and lost its outer enveloping as a planetary nebula.
minerals are classified into groups based on ____
Answer:
The correct answer is: their composition.
Explanation:
The mineral classification is based on the chemical composition and internal structure, which together represent the essence of a mineral and determine its physical properties. According to the chemical composition, minerals are divided into classes according to the dominant anion or anionic group, for example, oxides, halides, sulphides and silicates, among others.
Minerals have the same anion or dominant anionic group in their composition, so they have family similarities and characteristics more clearly and strongly marked than those that share minerals that have the same dominant cation. Examples of this are carbonates, since they resemble each other more than copper ores.
Minerals related by the domain of the same anion tend to occur together in the same place or in similar geological deposits; for example, sulphides generally occur in associations close to deposits of the type of veins or replacement, while silicates form most of the rocks in the earth's crust.
What is an example of a molecule? (That I can draw)
ASAP
which type of object can ground static?
To ground all static charge you need to touch a ______ object
Answer: metallic
Explanation: plato
To ground all static charges, metallic object is required.
How do metallic objects static charge?Static charges are due to electrons. Static charges cause static electricity when electrons jump between substances with opposite charge. Grounding of static charges is done by wire being attached between container and water pipe or copper rod.
Total resistance is kept below one mega ohm .Static charges are greater in liquid state as molecules are loosely held by weak inter molecular forces of attraction.Static charges are controlled by controlling flow rate.
Static charges can be grounded by earthing which connects parts of electric power system to ground typically to earth's surface.It serves purpose of electrical safety and prevent static buildup.
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1.An acid is a substance that has a pH value that is lower than 7. A base is a substance that has a pH that is greater than 7. Citric acid commonly present in sour foods. Which one of these might be the pH of a citric acid solution?
pH=3.2
pH=7.0
pH=10.3
pH=14.0
2.Which mixture is homogenous?
Salt stirred together with sugar
Sugar dissolved in water
water droplets scattered in the air to form fog
dirt suspended in water
3. Which mixture is heterogeneous
salt dissolved in water
air
metal ally
tossed salad
gravity is best described by which of the following
a) a kind of acceleration
b) a molecular pull
c) a fundamental force
d) a description of mass
When speaking about his numerous and important contributions to science, Isaac Newton said: "If I have been able to see further, it is because I stood on the shoulders of giants.”
Explain how this statement relates to scientific knowledge, theories, and laws changing over time.
you need to do a research paper on global warming which of the following would be a reliable source for the information you need
A. a popular tabloid magazine
B. a scientific journal about global literacy
C. an environmental government agency's website
D. a website that can be edited by anyone
C is obvious because no other choice has any closer answer
Plz Help!! 20 points!!
A student draws a picture of the products and reactants of a chemical reaction. What, if anything, is wrong with the drawing?
A) The drawing is wrong because there are more chemicals on the products side.
B) The drawing is correct because there are 12 compounds on each side of the arrow.
C) The drawing is wrong because there are different compounds on each side of the arrow.
D) The drawing is correct because there are 12 atoms of each type on each side of the arrow.
Answer:
Its d
Explanation:
Why is a solution not a pure substance?
A. it is made up of two substances that are chemically combined.
B. It is made up of one substance.
C.It is a mixture between a solute and solvent.
D. The solute and solvent cannot be separated.
which element of art would this tool help an artist to understand?
A. line
B. shape
C. color
D. space
a sample of gas occupies 806 ml at 26°c and 998 mmhg. find the volume in liters of the gass at STP
The volume of the gas at STP is equal to 0.966 L.
What is the ideal gas equation?The ideal gas law is described as an equation of the state of an ideal gas. This law states that the product of the volume and pressure of one mole gas is equal to the product of the gas constant and absolute temperature.
The mathematical expression of the ideal gas law is as follows:
PV = nRT
where n is the amount of substance, P is the pressure, V is the volume, and R is the gas constant.
Given, volume of gas, V = 806 ml = 0.806 L
The temperature of gas, T = 26° C = 299 K
The pressure of gas, P = 998 mmHg = 1.313 atm
The number of moles of given gas, n = PV/RT
n = 1.313 ×0.806/(0.082 × 299)
n = 0.043 mol
The temperature of gas at STP, T = 273.15 K, pressure at STP, P = 1 atm
The value of the gas constant, R = 0.082 atmL/K mol
Substituting the values n, R, P, and T in the ideal gas equation, we get:
1 × V = 0.043 × 0.082 × 273.15
V = 0.966 L
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What is true of intercellular signals that do not go through direct connections between cells, such as plasmodesmata?
A. The signal fails to reach the inside of the cell, and the cell does not respond.
B. The signal is transferred to an adjacent cell for signal transmission.
C. An ion-linked channel to the nucleus opens up.
D. A receptor molecule accepts the signal and transports it inside the cell.
I believe that what happens here is that when those cells carrying those intercellular signals do no pass through the connections, actually the signal is passed through or are transferred to adjacent cells for signal transmission, hence the answer is:
B
I did the test and C. what correct. Could you please mark me brainiest?
Suppose a cell is seriously deprived by water. How might this lack of water affect the cell’s enzymes?
If a cell is seriously deprived of water, this lack of water would most likely affect the cell’s enzymes because:
The cytoplasm and plasma membrane would not function properlyBoth the plant and animal cell needs water in order to perform their basic functions which include transport of materials, waste distribution, production of genetic information, and many more.
As a result of this, we can see that there would be a serious problem if any of these cells are deprived of water which would lead to the cytoplasm and plasma membrane to partially shut down because they would not be able to engage in protein synthesis and other important functions.
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Which of these is a physical property? Flammability Malleability Reactivity Toxicity
Antoine Lavoisier found that mass was conserved in chemical reactions when he saw that A) heat was released in chemical reactions. B) the products differed greatly from the reactants. C) the mass of the products was the same as that of the reactants. D) the mass of the products were heavier than the mass of the reactants.
A sample of C3H8 has 7.52×1024 H atoms. How many carbon atoms does the sample contain?What is the total mass of the sample?
The C3H8 sample has 2.82 x 1024 carbon atoms and a total mass of 68.8712 g.
Explanation:Given that the number of H atoms in the C3H8 sample is 7.52 x 1024, calculating the number of propane (C3H8) molecules involves dividing that number by the amount of hydrogen atoms in a single C3H8 molecule, which is 8. This gives us the number of molecules in the sample as 9.4 x 1023 molecules.
As each propane molecule has 3 carbon atoms, the total amount of carbon atoms in the sample can be found by multiplying 9.4 x 1023 by 3, resulting in 2.82 x 1024 carbon atoms.
In order to find the total mass of the sample, we need to know the molar mass of propane, which is 44.097 g/mol. Using Avogadro's number (6.02 x 1023 molecules/mol), we can find the number of moles in the sample, which is 1.56 moles of propane. Multiplying this by the molar mass, we get that the total mass of the sample is 68.8712 g.
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Hair color is a trait that’s controlled by many genes working together. Each gene contributes to this trait only in a small proportion. Which pattern of inheritance is this?
what is the frequency of a light save with a wave length of 680 nm
Sodium chloride is made up of clear, colorless crystals. A solution of sodium chloride in water is a good conductor of electricity. Which statement describes sodium chloride?
A solution of sodium chloride in water is indeed a good conductor of electricity.
A conductor refers to a material or substance that allows the flow of electric charges or current through it. Conductors have properties that facilitate the movement of electrons, which are negatively charged particles, within the material.
Now, the statement that describes sodium chloride based on the given information is:
A solution of sodium chloride in water is a good conductor of electricity. Sodium chloride, commonly known as table salt, consists of clear, colorless crystals.
When sodium chloride is dissolved in water, it dissociates into sodium ions[tex](Na^+)[/tex]and chloride ions [tex](Cl^-)[/tex].These ions are responsible for the conductivity of the solution. Since ions are charged particles, they can move freely in the solution and carry electric current.
Therefore, as a result, sodium chloride in water is a good conductor of electricity.
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Which method would be best to separate a mixture of oil and vinegar?
Because of bronze'z high _________ , ancient Egyptians were able to use it to make mirrors
Bronze's high shiny and soft properties was why ancient Egyptians were able
to use it to make mirrors.'
Bronze composition
Bronze is an alloy which is formed from the combination of copper and tin.
They are used for different purposes such as:
OrnamentsAutomobile partsCoins and jewelry etc.In the ancient Egyptian period, they were used in the production of mirrors
as a result of the shiny surface.
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Describe the path that moisture takes from the ocean to the runoff that forms a river
The path from ocean to river runoff involves evaporation, condensation, and precipitation in the water cycle, followed by surface runoff, snowmelt, or streamflow.
Explanation:The path that moisture takes from the ocean to the runoff that forms a river involves several steps in the water cycle. The process begins with evaporation and sublimation of water from the ocean, which rises into the atmosphere. The moisture then condenses to form clouds and falls back to the Earth as precipitation. This precipitation can enter freshwater bodies or infiltrate the soil, and eventually make its way to the ocean through surface runoff, snowmelt, or streamflow.
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Which of the following describes the electron sharing between two oxygen atoms?
Each oxygen shares two electrons with each other.
Each oxygen shares eight electrons with each other.
Each oxygen shares one electron with each other.
Each oxygen shares six electrons with each other.
The correct description of electron sharing between two oxygen atoms is "Each oxygen shares two electrons with each other."
Each oxygen atom has six valence electrons. When they bond to form an oxygen molecule (O2), they share two electrons each, resulting in a double covalent bond. This sharing allows each oxygen atom to achieve a stable octet configuration, resembling the configuration of a noble gas. Therefore, the correct answer is that each oxygen shares two electrons with each other.