Answer:
I believe it's Greenland
PLS HELP I WILL MARK BRAINLIEST NO LINKS OR PDFS AND PLSEXPLAIN YOUR ANSWER CLEARLY THANKYOU
When a chemical reaction is balanced, what do you know about the atoms on each side?
Answer:If each side of the equation has the same number of atoms of a given element, that element is balanced. If all elements are balanced, the equation is balanced. - online resource
Explanation: if not im sorry
Help me out, please.
Answer:
I'm going to have to say A
Explanation:
A gradual change over time in a species that enables the species to better survive in its environment is known as a(n)
A. adaptation
B. habitat
C. population
D. competition
Answer:
Adaption
Explanation: the definition of adpation is to learn how to survive or to learn what to do to be better or wtvr
Im lost pls help me answer this and don't send me Links its annoying
Answer:
I think its 40 but Im not sure
hope this helps
have a good day
Explanation:
The following table lists the speed of sound in various materials. Use this table to answer the question.
Substance Speed (m/s)
Glass 5,200
Aluminum 5,100
Iron 4,500
Copper 3,500
Salt water 1,530
Fresh water 1,500
Mercury 1,400
Hydrogen at 0°C 1,284
Ethyl Alcohol 1,125
Helium at 0°C 965
Air at 100°C 387
Air at 0°C 331
Oxygen at 0°C 316
How long would it take for a sound impulse to travel through a copper rod 25 kilometers long?
0.071 sec
7.1 sec
140 sec
0.14 sec
Answer:
7.1 sec
Explanation:
7.1 sec it take for a sound impulse to travel through a copper rod 25 kilometers long. 7.1 sec it take for a sound impulse to travel through a copper rod 25 kilometers long. This answer has been confirmed as correct and helpful.
pls mark me as brainliest trust me
Answer:
The answer would be 7.1 i think but this was already answerd so just saying that we both have gotten the same answer. But no matter what there is always a chanse that you can mess up.
All my questions are being "Deleted" for violating community guidelines by the same bots that scam you with the file. I swear- if it turns out the moderation team is scamming it's own site users.... (Not saying this is the case, but how does a scam 'bot' delete a question?)
Answer:
well im not sure why
Explanation:
but this one isn't deleted yet sooo
Which statement describes a characteristic of an evergreen coniferous tree?
can grow in the tundra
has cones and needle-like leaves
leaves change color in the fall
loses all leaves in the winter
(10 points ) please help this is major grade .
Answer:
absorbed
Explanation:
because black absorbs the light around it
Answer:
The Answer is arsorbed
Explanation:
if you help me ill give you brainiest
Answer:
A: in the cells of autotrophs
Explanation:
Autotrophs are organisms that can produce their own food using light
Answer: the answer is D
Explanation:
Plants release oxygen into the atmosphere during photosynthesis while respiration by plants and animals and the decomposition and decay of dead organisms releases carbon dioxide into the atmosphere.
What effect do cows and other livestock have on global warming? Choose the best answer.
They eat trees and grass, which adds to global
warming
Their digestive systems produce methane, a powerful
greenhouse gas
Humans use lots of fossil fuels to cook the meat they
produce, adding to global warming
Livestock have high body temperatures and emit
infrared radiation, adding to global warming
Their digestive systems produce methane, a powerful greenhouse gas.
Cows produce methane gas as a byproduct of their digestive process.
Methane is an important greenhouse gas that has a significant impact on global warming. Methane has a very high warming potential as compared to carbon dioxide (CO2) in a shorter time period.
Methane released from livestock contributes a lot to the greenhouse effect and contributes to climate change.
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Henry stands outside every night at 9:00 p.m. for one week to observe the stars. Each night, he observes the same group of seven stars. What can you infer from Henry's observations?(2 points)
A. That this group of stars is called shooting stars
B. That this group of stars changes every night
C. That this group of stars creates a pattern
D. That this group of stars disappears
Answer:
C
Explanation:
This group of starts creates a pattern
Please give an explanation for brainiest
Answer:
Neon
Explanation:Neon is stable as it has a full octet or valence shell of 8 electrons. If you are in year 11 or beyond, this will change, but I assume that you are still touching the surface of chemistry and learning that all noble gases (last group on the periodic table) have a full valence electron and "are happy," thus stabl
true or false:The Earth's climate is changing.
True
False
Ocean currents - Surface ocean currents can occur on local and global scales and are typically wind-driven, resulting in both horizontal and vertical water movement. Deep ocean currents are density-driven and differ from surface currents in scale, speed, and energy. Water density is affected by the temperature, salinity (saltiness), and depth of the water. The colder and saltier the ocean water, the denser it is. The greater the density differences between different layers in the water column, the greater the mixing and circulation. Density differences in ocean water contribute to a global-scale circulation system, also called the global conveyor belt. The global conveyor belt includes both surface and deep ocean currents that circulate the globe in a 1,000-year cycle. The ocean’s global conveyor belt plays a key role in distributing heat energy and regulating weather and climate. The driving force behind this circulation system is
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Surface ocean currents can occur on local and global scales and are typically wind-driven, resulting in both horizontal and vertical water movement. ... Water density is affected by the temperature, salinity (saltiness), and depth of the water. The colder and saltier the ocean water, the denser it is.Mar 21, 2013
A. Earth's orbital distances around the Sun throughout the year
B. differences in the heat energy balance at different latitudes on Earth
C. convections cells throughout the oceans that are the result of the Coriolis effect
D. the circulation of air in the troposphere due to differences in incoming solar radiation
science not chemisty
Answer:
d
Explanation:
The sirculation of airin the troposhere du
What changes when you add a neutron to an atom?
a.
just the mass changes
b.
just the charge changes
c.
just the element changes
d.
the mass, the charge, and the element
NEED HELP FAST
NO LINK ANSWERS
Identify the molecule shown by using the correct combination of the following terms:
Inorganic
Organic
Hydrocarbon
Provide the Chemical Formula for the molecule shown.
Identify whether this molecule is a monomer or polymer and explain your answer.
Answer:organic
Explanation:
What might happen if the greenhouse effect didn't exist?
It would be too cold for humans to survive on the earth
The earth's temperature would be much more comfortable
The sun's rays would never reach the surface of the earth
The earth wouldn't have an atmosphere
measured in joules is it thermal energy or temperature
Answer:
Thermal energy
Explanation:
Temperature is measured in kelvin (For SI metric units).
Energy is always measured in joules (For SI metric units).
Celsius (°C), Fahrenheit (°F), and Kelvin (K) are three different units usually used to measure temperature in daily life situations. Joules is the SI unit of work or energy. Temperature and heat energy are related, but they are not the same.
1.How does ethylene relate to polyethylene?
2.Which of the two molecules would most likely be a plastic?
3.Propose a simple process for how polyethylene is physically produced.
NO LINK ANSWERS
This is a written answer
Answer:
1.ansEthylene is at this point still a gas and needs pressure and a catalyst to turn it into polyethylene, a resin. The process by which polyethylene is made from ethylene is known as polymerization. ... Polymerization occurs when a chemical reaction causes molecules to react together to form polymer chains
2.ansPlastics are a wide range of synthetic or semi-synthetic materials that use polymers as a main ingredient. Their plasticity makes it possible for plastics to be moulded, extruded or pressed into solid objects of various shapes. This adaptability, plus a wide range of other properties, such as being lightweight, durable, flexible, and inexpensive to produce, has led to its widespread use. Plastics typically are made through human industrial systems. Most modern plastics are derived from fossil fuel-based chemicals like natural gas or petroleum; however, recent industrial methods use variants made from renewable materials, such as corn or cotton derivatives.[1]
In developed economies, about a third of plastic is used in packaging and roughly the same in buildings in applications such as piping, plumbing or vinyl siding.[2] Other uses include automobiles (up to 20% plastic [2]), furniture, and toys.[2] In the developing world, the applications of plastic may differ; 42% of India's consumption is used in packaging.[2] In the medical field, polymer implants and other medical devices are derived at least partially from plastic. Worldwide, about 50 kg of plastic is produced annually per person, with production doubling every ten years.
The world's first fully synthetic plastic was Bakelite, invented in New York in 1907, by Leo Baekeland,[3] who coined the term "plastics".[4] Dozens of different types of plastics are produced today, such as polyethylene, which is widely used in product packaging, and polyvinyl chloride, used in construction and pipes because of its strength and durability. Many chemists have contributed to the materials science of plastics, including Nobel laureate Hermann Staudinger, who has been called "the father of polymer chemistry" and Herman Mark, known as "the father of polymer physics".[5]
The success and dominance of plastics starting in the early 20th century has caused widespread environmental problems, due to their slow decomposition rate in natural ecosystems. Toward the end of the 20th century, the plastics industry promoted recycling in order to assuage environmental concerns while continuing to produce virgin plastic. The main companies producing plastics doubted the economic viability of recycling at the time, and this is reflected in contemporary plastic collection. Plastic collection and recycling is largely ineffective because of the complexity of cleaning and sorting post-consumer plastics. Most plastic produced has not been reused, either being captured in landfills or persisting in the environment as plastic pollution. Plastic pollution can be found in all the world's major water bodies, for example, creating garbage patches in all of the world's oceans and contaminating terrestrial ecosystems.
Explanation:
3.ansPolyethylene or polythene (abbreviated PE; IUPAC name polyethene or poly(methylene)) is the most common plastic in use today[when?]. It is a polymer, primarily used for packaging (plastic bags, plastic films, geomembranes, containers including bottles, etc.). As of 2017, over 100 million tonnes of polyethylene resins are being produced annually, accounting for 34% of the total plastics market.[5][6]
Many kinds of polyethylene are known, with most having the chemical formula (C2H4)n. PE is usually a mixture of similar polymers of ethylene, with various values of n. It can be low-density or high-density: low-density polyethylene is extruded[verification needed] using high pressure (1000–5000 atm) and high temperature (520 kelvins), while high-density polyethylene is extruded[verification needed] using low pressure (6–7 atm) and low temperature (333–343 K). Polyethylene is usually thermoplastic, but it can be modified to become thermosetting instead, for example, in cross-linked polyethylene.
In what form is radiation emitted from the earth's surface back into the atmosphere?
As light
As greenhouse gases
As gamma rays
As heat
When a chemical reaction is balanced, what do you know about the atoms on each side?
PLEASE HELP THIS IS DUE IN 30 MINUTES!!!
Answer:
they are opposite, negative and positive
What is causing the Earth's climate to change? (Choose the 2 correct answers)
Greenhouse gases.
Burning fossil fuels.
The Earth's climate isn't changing.
Hot house gases.
Answer:
green house gases and burning fossil fuels
____ drive(s) the process of cloud formation. A) Solar energy B) Greenhouse gases C) Global positioning D) Atmospheric pressure
Answer:
Atmospheric pressure
Explanation:
The higher the temperature or atmospheric pressure, the more water vapor the air can hold. ... Those particles provide surfaces on which water vapor can change into liquid droplets or ice crystals. A large accumulation of such droplets or ice crystals is a cloud.
What is the difference between weather and climate? (Choose the 2 correct answers)
Climate changes over short periods of time and weather changes over long periods of time.
Climate is the average weather over a period of time and weather is a short-term change.
Climate is changes in temperature, clouds, rain, or snow.
Weather is changes in temperature, clouds, rain, or snow.
Answer:
Climate is the average weather over a period of time and weather is a short-term change.
Weather is changes in temperature, clouds, rain, or snow
Copper carbonate always has 5.3 parts copper to 4 parts oxygen to 1 part carbon. In other words, the ratio of copper to oxygen to carbon is 5.3:4:1. The picture shows that in a 103g sample of copper carbonate, there are 53g of copper, 40g of oxygen, and 10g of carbon. A sample of copper carbonate was found to contain 15.9g of copper. How many grams of copper carbonate were in the sample? Use the ratio of copper to oxygen to carbon.
Answer:
Atoms are rearranged during chemical reactions, and are not lost or gained. Chemical reactions can be represented using equations. Catalysts speed up reactions without being used up.
Part ofChemistryChemical reactions and tests
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Thermal decomposition
Some compounds break down when heated, forming two or more products from one reactant. This type of reaction is called thermal decomposition.
Many metal carbonates can take part in thermal decomposition reactions. For example, copper carbonate breaks down easily when it is heated:
copper carbonate → copper oxide + carbon dioxide
CuCO3 → CuO + CO2
Copper carbonate is green and copper oxide is black. You can see a colour change from green to black during the reaction. The carbon dioxide produced can be detected using limewater, which turns milky.
Green copper carbonate is heated in a test tube. It changes to black copper oxide and gives off carbon dioxide gas.
Copper carbonate is easily decomposed by heating
Other metal carbonates decompose in the same way. Here are the equations that represent the thermal decomposition of calcium carbonate:
calcium carbonate → calcium oxide + carbon dioxide
CaCO3 → CaO + CO2
Thermal decomposition is an example of an endothermic reaction, a reaction that gains energy from the surroundings. This is why thermal energy must be supplied constantly for the reaction to keep going. Note that some other reactions are exothermic reactions – they give out energy to their surroundings.
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From the ratio of copper to carbon and oxygen in copper carbonate, the mass of copper carbonate in grams containing 15.9 of copper is 30.9 g.
What is copper carbonate?
Copper carbonate is an ionic compound having the formula CuCO₃. It is a cyan colored water insoluble solid which can be converted to oxides. Copper carbonate is used as a pigment in paints and varnishes.
It is given that the ratio of copper to oxygen to carbon in copper carbonate is always 5.3 : 4 : 1. Thus, for a 10.3 gram of copper carbonate the mass of copper will be 5.3 g and mass of oxygen and carbon is 4 and 1g respectively.
Given that a sample of copper carbonate contains 15.9 g of copper. Let x g be the mass of copper carbonate. The sum of ratios of copper, oxygen and carbon is 10.3. Thus it is written as:
5.3 × X/ 10.3 = 15.9 g.
5.3 X = 163.7 g.
X = 30.9 g.
Therefore, the mass of copper carbonate in grams containing 15.9 of copper is 30.9 g.
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If you were to stand in the exact same position and track a pattern of stars in the sky throughout the night, what would you observe?
A.The stars would appear to move and change positions.
B.The stars would move a small distance and then stay in the new position for the night.
C.The stars would stay in the exact same position throughout the night.
D.You would not be able to see the stars throughout the night as they disappear at a certain time.
Answer:
A
Explanation:
The earth's rotation makes stars appear to move during the night.
Based on the diagram above, nitromethane has a chemical formula of CH
______ _____
NO LINK ANWERS
This is a fill in the blank question, there is no word bank
Answer:
Nitromethane, sometimes shortened to just Nitro, is an organic compound with the chemical formula CH
3NO
2. It is the simplest organic nitro compound. It is a polar liquid commonly used as a solvent in a variety of industrial applications such as in extractions, as a reaction medium, and as a cleaning solvent. As an intermediate in organic synthesis, it is used widely in the manufacture of pharmaceuticals, pesticides, explosives, fibers, and coatings.[12] Nitromethane is used as a fuel additive in various motorsports and hobbies, e.g. Top Fuel drag racing and miniature internal combustion engines in radio control, control line and free flight model aircraft.
Explanation:
Preparation
Nitromethane is produced industrially by combining propane and nitric acid in the gas phase at 350–450 °C (662–842 °F). This exothermic reaction produces the four industrially significant nitroalkanes: nitromethane, nitroethane, 1-nitropropane, and 2-nitropropane. The reaction involves free radicals, including the alkoxyl radicals of the type CH3CH2CH2O, which arise via homolysis of the corresponding nitrite ester. These alkoxy radicals are susceptible to C—C fragmentation reactions, which explains the formation of a mixture of products.[12]
Laboratory methods
It can be prepared in other methods that are of instructional value. The reaction of sodium chloroacetate with sodium nitrite in aqueous solution produces this compound:[13]
ClCH2COONa + NaNO2 + H2O → CH3NO2 + NaCl + NaHCO
11. Hay is made up of organic compounds. What are the main elements in many organic compounds?
Answer:
35
Explanation:
How can global warming cause sea levels to rise? Choose the best answer.
By causing it to rain more often
By melting glaciers and polar ice caps
By increasing the number of undersea volcanic
eruptions
By creating bigger and more powerful hurricanes
A scientist wants to learn more about a set of stars in the night sky. What should he or she do to learn if it's a pattern or not?
A.Read a magazine on stars
B.Research stars on a computer
C.Make observations of the stars for one night
D.Make observations of the stars every night for two weeks
Answer:
B or D
Explanation:
they are both good choices.. sorry I didn't know the definite answer