Answer:
Reducing the volume of a contained gas by one third, while holding temperature constant, causes pressure to increase by 3.0 times.
Explanation:
Boyle’s Law : At constant temperature, the volume of a given quantity of a gas varies inversely with its pressure.It is clear from the data that V ∝ 1/P.Also, PV = constant.So, for two different values of both P and V:
∴ P₁V₁ = P₂V₂.
∵ V₂ = 1/3V₁
∴ P₂ = P₁V₁/V₂ = P₁V₁/(1/3V₁) = 3P₁.
what atom is 10ne20
[tex]^{20}_{10}\text{Ne}[/tex].
That's a neon-20 atom.
ExplanationHere's the symbol of neon-20, showing both its atomic number and its mass number.
[tex]^{20}_{10}\text{Ne}[/tex].
Ne is the chemical symbol of neon. The number 20 in the upper-left corner is the mass number of this atom.The number 10 in the lower-left corner is the atomic number of this atom.How to name this atom?
Start with the name of the element: "neon" for Ne, atomic number 10.Write a hyphen: "-" with no space around.Write the mass number: "20" right next to the hyphen.What about the atomic number? The atomic number is unique for each element. It is implied in the first part of the name. For example, the atomic number of a "neon-20" atom is always going to be 10 since the atomic number of neon is 10. That number is printed on the periodic table. However, the mass number may vary between isotopes of each element. That number needs to be specified.
The name of this atom is neon-20.
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According to current scientific thinking, how did the solar system that contains earth form?
Answer:
The dust and gas particles of a slowly rotating nebula gradually came together to form a cloud with a huge central bulge surrounded by a flat ring of dust and gas. The sun was formed from the material in the bulge. The flat ring became several rings. In each ring, a planet formed and continued to revolve around the sun in the plane of the ring it came from.
Explanation:
The reaction shifts toward the product gas.
Ammonia is consumed in the reaction.
The system reacts by increasing the number of gas molecules.
The pressure on the gases decreases momentarily.
Answer:Amonia is consumed in the reaction.
Explanation:
According to the Le-chatieler principle by decreasing the volume on reactant side the products(amonia) will collide and will shift the reaction to the reverse side ,hence the amonia is consumed.
Which of the following measures thermal energy in an object?
Volume
Heat
Mass
Temperature
i am confused
heat or temperature
but according to me the answer is heat
Answer: temperature
Explanation:
Thermal energy is the energy possessed by an object by virtue of its temperature. The hotter the substance, the more its molecules vibrate, and therefore the higher its thermal energy.
Thermal energy refers to the sum of kinetic, potential, vibrational ,electronic and rotational energies of the object.
Heat is the thermal energy which is transferred from a body at higher temperature to a body at colder temperature.
Temperature of an object is the measure of hotness or coldness of n object.
Which type of technology is used to map the ocean floor?
Echo Sounding is the technology used to map the ocean floor.
What is Echo Sounding ?This method was developed by German Scientist , In this different frequency of sound is used to determine different objects below the sea surface.
The ships having transducers which emit and receive sound waves in form of cone are used .
After projection of sound , depending upon the depth of the ocean the projection will be created on the ocean floor , which will echo back to the transducers after amplification to record and manipulate the data.
The depths are calculated as the time sound takes to reach through the ocean and back.
Therefore , Echo Sounding is the technology used to map the ocean floor.
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please help!!! Which of the following describes a response to external stimuli ?
a. A boy sneezes when exposed to a cat dander.
b. A girl eats food when she is hungry.
c. A child becomes hyperactive do to a chemical imbalance.
d. A person yawns when oxygen levels in the blood are low.
Answer: Saliva, sweat, pee, and dander (dead skin cells) can all trigger allergies. Pet fur also traps mold, pollen, and other outdoor allergens that make you sneeze and your eyes water.
Explanation:
Answer:
A
Explanation:
Match the terms to their definition.
1. centi-
Finding the size, quantity, or amount by comparing with a standard.
2. decimal system
Prefix meaning one-hundredth (.01).
3. kilogram
A system of numeration that is based on units of 10.
4. kilo-
The basic measure of mass in the metric system.
5. liter
Prefix meaning one thousand (1,000).
6. measurement
The basic measure of volume in the metric system.
1. Centi
Prefix meaning one-hundredth (.01).
2. Decimal system
A system of numeration that is based on units of 10.
3. Kilogram
The basic measure of mass in the metric system.
4. Kilo
Prefix meaning one thousand (1,000).
5. Liter
The basic measure of volume in the metric system.
6. Measurement
Finding the size, quantity, or amount by comparing with a standard.
Please find the explanations in the document.Final answer:
The terms centi-, decimal system, kilogram, kilo-, liter, and measurement are related to the metric system, used for specifying measurements using prefixes like centi- for one-hundredth and kilo- for one thousand. These prefixes help in measuring various sizes using the decimal system.
Explanation:
The terms to be matched with their definitions are related to the metric system and its units of measurement. Here is the matched list:
Centi-: Prefix meaning one-hundredth (.01).
Decimal system: A system of numeration that is based on units of 10.
Kilogram: The basic measure of mass in the metric system.
Kilo-: Prefix meaning one thousand (1,000).
Liter: The basic measure of volume in the metric system.
Measurement: Finding the size, quantity, or amount by comparing with a standard.
A metric ruler is a common tool for measuring metric lengths such as millimeters and centimeters. Metric prefixes such as centi- and kilo- simplify the process of measurement by providing a range of units that correspond to various powers of ten. This means larger or smaller quantities can be measured efficiently, using suitable units like centimeters for small lengths and kilometers for large distances.
What does the map show about the Earth 225 million years ago ?
About 225 million years ago, the earth contained a single landmass; called Pangaea. That landmass was divided into two landmasses, viz. Laurasia and Gondwana Land; about 200 million years ago. ... The Gonwana Land included the modern day India, Australia, South America, South America and Antarctica.
Answer:
It shows Pangaea.
Explanation:
The map about the Earth 225 million years ago shows the supercontinent Pangaea, in which present-day continents were located close to each other. At that time, plants and animals were moved freely over all of the continents. Pangaea was centred on the Equator and surrounded by the superocean Panthalassa.
how will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?
A: it is tripled to three times its original volume
B:it is decreased to one third of its original volume
C:it is decreased to 3L less than its original volume
The answer is B. When you increase the pressure, you compress the gas to a fraction of its original volume.
I would decrease by a third of the orgin. volume.
If a gas has a volume of 1000 ML at a temperature of 23°C and a pressure of 100 mmhg, what is it’s volume under standard conditions of temperature and pressure?
Answer:
119.7 mL.
Explanation:
From the general law of ideal gases:PV = nRT.
where, P is the pressure of the gas.
V is the volume of the container.
n is the no. of moles of the gas.
R is the general gas constant.
T is the temperature of the gas (K).
For the same no. of moles of the gas at two different (P, V, and T):P₁V₁/T₁ = P₂V₂/T₂.
P₁ = 100.0 mmHg, V₁ = 1000.0 mL, T₁ = 23°C + 273 = 296 K.P₂ = 1.0 atm = 760.0 mmHg (standard P), V₂ = ??? mL, T₂ = 0.0°C + 273 = 273.0 K (standard T).∴ V₂ = (P₁V₁T₂)/(T₁P₂) = (100.0 mmHg)(1000.0 mL)(273.0 K)/(296 K)(760.0 mmHg) = 121.4 mL.
The moon accelerates because it is _____.
continuously increasing its speed of orbit
constantly increasing the diameter of its orbit
in a vacuum in space
continuously changing direction
please answer fast!!
The answer for your question is the first one
The moon accelerates because it is continuously increasing its speed of orbit
Heat always travels from ________ to
A)hot, cold.B)cold, hot.C)least dense, most dense.D)low energy, high energy.
Hey there!
The correct answer is A. Hot, Cold
Heat always travels from HOT to COLD
Hope this helps you!
God bless ❤️
xXxGolferGirlxXx
Heat always travels from hot to cold, the answer is A.
Calculate the percent of Cl in KClO4
Answer:
25.6 %.
Explanation:
To calculate the % of Cl in KClO₄:% Cl = [Atomic mass of (Cl)/molar mass of KClO₄] x 100 = [(35.5 g/mol)/(138.55 g/mol)] x 100 = 25.62 % ≅ 25.6 %.
Wavy bands of light and dark minerals visible in gnesis bedrock probably formed from the ?
1) cementing together of individual minerals grains
2) cooling crystallization of magma .
3) evaporation of an ancient ocean.
4) heat and pressure during metamorphism
it is number 4 heat and pressure during metamorphism
How many moles are in 2.47 x 10^22 molecules of H2O
Need to divide by Avogadro’s number which is 6.022*10^23
(2.47 * 10^22 molecules)/(6.022*10^23 molecules) = 0.041 mole
To find the number of moles in 2.47 x 10^22 molecules of water, divide the number of molecules by Avogadro's number (6.02 x 10^23). The result is approximately 0.0410 moles.
Explanation:The subject of your question is in the field of Chemistry, specifically in stoichiometry and the mole concept. You're interested in finding the number of moles in 2.47 x 1022 molecules of H2O (water). To tackle this, we use Avogadro's number, which states that one mole of any substance contains 6.02 x 1023 particles (atoms, molecules, ions, etc.).
To solve this, you divide the number of molecules by Avogadro's number:
2.47 x 1022 molecules / 6.02 x 1023 molecules/mole = 0.0410 moles.
So, there are roughly 0.0410 moles in 2.47 x 1022 molecules of H2O.
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How many moles of barium chloride are needed to produce 105.8 g of aluminum chloride?
The answer would be 0.0861 moles
Final answer:
To find the moles of aluminum chloride from a given mass, you must use its molar mass. With a mass of 105.8 g and a molar mass of 133.33 g/mol, you get 0.794 moles of aluminum chloride. Additional information is needed to directly involve barium chloride in the calculation.
Explanation:
To determine how many moles of barium chloride are needed to produce 105.8 g of aluminum chloride, we'll need to consider the stoichiometry of the reaction. However, based on the information provided, there seems to be a possible error as barium chloride does not directly react to form aluminum chloride in a simple exchange reaction. Instead, we'll determine the moles of aluminum chloride (AlCl3) from its mass and molar mass.
First, calculate the molar mass of AlCl3:
Al: 26.98 g/mol
Cl: 35.45 g/mol × 3 = 106.35 g/mol
The molar mass of AlCl3: 26.98 g/mol + 106.35 g/mol = 133.33 g/mol.
Now use this to find the moles of AlCl3:
(105.8 g AlCl3) / (133.33 g/mol) = 0.794 moles of AlCl3.
Assuming a typical synthesis reaction where aluminum reacts with chlorine, the stoichiometry would be 2 Al + 3 Cl2 → 2 AlCl3. For every 2 moles of AlCl3 produced, you would need 2 moles of Al and 3 moles of Cl2. Any additional information such as the reaction involving barium chloride would be needed to provide a more specific answer involving barium chloride.
What does an eco psychologist study
Ecopsychology is what it sounds like: a hybridization between the field ofpsychology (the study of human behavior and the soul) and that of ecology (the relationship of organisms to one another and to their physical surroundings1). studies the relationship between a person's mental health and the environment.
In which of the following is the number of electrons the ion contains given correctly
Answer:
B. K+ has 18 electrons
Explanation:
Ions are formed when atoms of element gain or loose electrons.When an atom looses electrons it forms a positively charged ion and when an atom gains electrons it forms a negatively charged ion.Metal atoms such as potassium, magnesium and aluminium looses outer most electrons to positively charged ions.Potassium atom has 19 electrons, 19 protons, with an electronic configuration of 2 : 8 : 8 : 1. To form an ion, K looses an electron to form a positively charged potassium ion (K+) with 18 electrons and 19 protons and an electronic configuration of 2:8:8.It is not possible for global warming to have any positive side effects. Please select the best answer from the choices provided T F
False. For example, changing climates will mean that some areas that experience harsh weather will soon being to experience milder weather. :)
Answer: True
Explanation:
Global warming is a natural phenomena associated with increase in the global temperatures worldwide due to abundance of greenhouse gases in the atmosphere. These greenhouse gases like carbon monoxide, carbon dioxide, nitrogen dioxide are added into the atmosphere by the human activities like burning of fossil fuels and deforestation. It is concerned with many negative side effects like melting of glaciers, loss of biodiversity due to increase in global heat, increase in incidences of human diseases like asthama, hypertension.
Describe a protein molecule.
Answer:
Explanation:
Proteins are made up of amino acids. Amino acids are the simply the monomeric units of proteins. An amino acid is bifunctional in that it carries an amino group(-NH₂) and a carboxyl group(-COOH) attached to a carbon atom in a molecule.
Amino acids can form long polyamide chains that makes up proteins. A peptide bond binds an amino group of the first amino acid molecule with the carboxyl group of the second amino acid molecule.
Proteins are high polymers made up of one or more peptide chains.
(text multiple choice) nonmetallic oxide + base → salt +
The non-metal oxides can be neutralized with a base to form a salt and water.
Non-Metal Oxide + Base → Salt + Water
For example,
SO3(g) + Ba(OH)2(aq) → BaSO4(aq) + H2O(l)
P4O10(s) + 12 NaOH(aq) → 4 Na3PO4(aq) + 6 H2O(l)
The non-metal oxides can be neutralized with a base to form a salt and water.
Non-Metal Oxide + Base → Salt + Water
For example,
SO3(g) + Ba(OH)2(aq) → BaSO4(aq) + H2O(l)
P4O10(s) + 12 NaOH(aq) → 4 Na3PO4(aq) + 6 H2O(l)
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How much heat is released when 47.50 g of CH4 (g) is burned in excess oxygen gas to produce carbon dioxide and water?
Answer:
= 2113.44 kJ
Explanation:
When 1 mole of CH4 (g) burns in excess oxygen -714.0 kJ of heat is released.
For 47.50 g;
molar mass of CH4 = 16.042 g/mol
Number of moles of CH4
= 47.5 g /16.042 g/mol
= 2.96 moles
Therefore;
1 mole = -714.0 kJ
Heat change for 2.96 moles
= 2.96 moles × -714.0 kJ
= 2113.44 kJ
What element is this? How do you know?
This element is Helium. This is because it has two protons and two neutrons in its nucleus. this makes it have the atomic mass of approximately four atomic mass units. It also has two electrons in the first energy level. . It is therefore a noble gas since this is the only energy level and it obeys the 2n² rule for the filling of energy levels. n in this case is 1 making the maximum number of electrons in the first energy level to be 2.
When an organism is finished growing, which of the following best describes what happens on the cellular level? A. Its cells stop reproducing. B. Its cells reproduce and die at the same rate. C. Its cells stop growing. D. Its cells grow and shrink at the same rate.
When an organism is finished growing, its cells stop growing at a cellular level. In multicellular organisms, most cells become terminally differentiated and no longer divide.
Explanation:When an organism is finished growing, its cells stop growing at the cellular level. This means that cells no longer increase in size or mass.
For example, in multicellular organisms like humans, once an individual reaches adulthood, most of their cells are considered terminally differentiated, meaning they have entered a phase called Go and no longer divide.
In contrast, during the growth phase, cells reproduce and divide to increase the number of cells in the organism.
Final answer:
Cells in an organism that has finished growing B. reproduce and die at the same rate. This balance occurs in the stationary phase and is due to factors like resource depletion and waste accumulation.
Explanation:
When an organism has finished growing, the process that best describes what happens on the cellular level is that the cells reproduce and die at the same rate. During the stationary phase, there is no overall change in population size because cell division is equivalent to cell death. This happens when resources such as nutrients and oxygen are depleted, and waste products build up.
When the body has reached its full size, cell reproduction generally does not occur except where it is necessary for tissue repair, such as in healing wounds. Nevertheless, cells still go through the G1 and G2 stages wherein materials are acquired and biomolecules are synthesized that can later be divided between two daughter cells. In multicellular organisms, once growth is complete, cell reproduction is supposed to cease except for necessary instances like injury repair.
A reaction between an acid and a base produced lithium chloride (LiCl). What acid and base combination could produce this salt?
A - sulfuric acid and lithium hydroxide
B - hydrochloric acid and lithium hydroxide
C - sulfuric acid and magnesium hydroxide
D - hydrochloric acid and magnesium hydroxide
Answer: The answer is B hydrochloric acid and Lithium hydroxide
Explanation:
A reaction between B - hydrochloric acid and lithium hydroxide produced lithium chloride.
A reaction between an acid and a base is called neutralization. A salt is formed, which contains the cation provided by the base and the anion provided by the acid.
A reaction between an acid and a base produced lithium chloride (LiCl). What acid and base combination could produce this salt?
A - sulfuric acid and lithium hydroxide. NO. Sulfuric acid provides the sulfate anion. B - hydrochloric acid and lithium hydroxide. YES. C - sulfuric acid and magnesium hydroxide. NO. Sulfuric acid provides the sulfate anion and magnesium hydroxide the magnesium cation. D - hydrochloric acid and magnesium hydroxide. NO. Magnesium hydroxide provides the magnesium cation.A reaction between B - hydrochloric acid and lithium hydroxide produced lithium chloride.
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which of the following is an example of how a scientist might use a model
A. Marbles placed inside a hollow sphere are used to describe protons in a nucleus
B. Stopwatches measure the amount of time it takes for runners to complete a mile
C. Microscopes are used to magnify a group of cells on sets of slides
D. A wrench is used to tighten a nut onto a piece of wood
A. Marbles placed inside a hollow sphere are used to describe protons in a nucleus.
it would be A because the other options are just the tools used in an experiment and A is actually using other objects
Scientific modeling has been the process of using charts and tables to represent ideas. It can be used to show marbles placed inside the hollow sphere to show the proton arrangement. Thus, option A is correct.
What are scientific models?Scientific modeling has been defined as the use of graphical and conceptual topics, systems, ideas, and processes to understand and identify patterns based on scientific knowledge. It allows a better understanding and explanation of the topic.
Marbles used to describe the proton arrangement inside the hollow sphere are the best example of scientific modeling as it uses marbles to represent protons with a positive charge to show their arrangement inside the nucleus of the hollow atom.
Therefore, option A. marbles placed inside the sphere show scientific modeling.
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1. Air contains mostly nitrogen (78%) and oxygen (21%). It also contains other gases, including carbon dioxide and helium, and various pollutants (both gases and solids). Write a brief explanation about why air is a mixture, whether it is homogeneous or heterogeneous, and how it can be separated into its components.
Air is a mixture of gases (and some dust) because the gases (oxygen, nitrogen, carbon dioxide, etc.) do not combine chemically into other compounds. Just like a mixture of salt & pepper doesn't combine into some other thing.
The mixture is homogenous if it consists only of gases. If dust is mixed in the mixture is heterogeneous (dust is solid matter, gas is gas) A heterogenous mixture is one of different types of matter.
Separating one gas from the other is different for each gas and a complicated matter.
Answer: Air is a homogeneous mixture of gases.
Explanation: Mixture is a composition in which 2 or more substances are present together without making a chemical bond or a chemical compound between them.
Thus Air qualifies itself as mixture because there are several number of gases present in different composition and different proportions. These gases do not combine with each other to form a chemical compound between them.
Homogeneous mixture is the mixture in which the phase of the mixture is just single phase and it is not possible to separate the components. Thus Air is a homogeneous mixture and its component can never be separated because it forms a single phase.
Koolaid is a solution. What is the solute? What is the solvent?
Solute: koolaid mix , Sugar
Sovlent: water
Water acts as a solvent in our Kool-aid, dissolving the sugar plus Kool-aid powder. A solute plus a solvent make up a solution.
What is solution?A solute plus a solvent make up a solution. The thing that dissolves in the solvent is called the solute. Solubility is the measure of a solute's ability to dissolve in a solvent. For instance, salt is the solute and water is the solvent in a saline solution.
The chemicals present in lesser concentrations are solutes, whilst the substances present in greater abundance are the solvent in solutions with components within the same phase. In the case of air, the solutes are the gases of oxygen and carbon dioxide, while the solvent is the gas of nitrogen. Water acts as a solvent in our Kool-aid, dissolving the sugar plus Kool-aid powder.
Therefore, water acts as a solvent in our Kool-aid, dissolving the sugar plus Kool-aid powder.
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How do forces in nuclear and chemical reactions differ
Nuclear reactions involve changes in the nucleus of an atom, while chemical reactions involve a transfer or sharing of electrons. The energies released in nuclear reactions are much greater than those in chemical reactions. Nuclear reactions are not affected by changes in environmental conditions, unlike chemical reactions.
Explanation:Nuclear reactions differ from chemical reactions in several ways. In chemical reactions, atoms become more stable by participating in a transfer or sharing of electrons. On the other hand, nuclear reactions involve changes in the nucleus of an atom, resulting in the production of a different element. The energies released in nuclear reactions are much greater than those involved in chemical reactions. Additionally, nuclear reactions are not significantly affected by changes in environmental conditions, such as temperature or pressure.
An atom has at least one positive proton and at least one negative electron. Which of the following is true about the protons and electrons in an atom?
A.
Protons and electrons are far apart with empty space in between.
B.
Protons and electrons are stuck together in neutral pairs.
C.
Protons and electrons orbit close together around a central nucleus.
D.
Protons and electrons are mixed together in a cloud.
Answer:
proton and electrons orbit close together around a center nucleus
Answer:
a
Explanation: