Answer:
A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom. ... Elements contain only one type of atom.
Explanation:
Answer:
A compound is just like what it is- a group of atoms put together. A element is made up of only 1 atom.
Explanation:
Which of the following do NOT indicate a chemical change has taken place?
A change in shape
B. light production
C. temperature increase
D. temperature decrease
If a person swallows acetone what are the procedures that should be followed
Answer:
get poison control
Explanation:
Answer:
call 911?
Explanation:
yo would have to do something to get it out sorry to hear that happen
The force of gravity between two objects is greater when the objects have 
Answer:
Objects with greater mass have a stronger force of gravity between them.
Explanation:
The strength of the gravitational force between two objects depends on two factors, mass and distance. the force of gravity the masses exert on each other. If one of the masses is doubled, the force of gravity between the objects is doubled.
Pleaseeee help meeee
Answer:
5) 24.3 amu
6) 193 amu
7) 6.94 amu
Explanation:
The fractional abundance shows how many atoms of the element exist as a particular isotope with a certain mass.
To find the average, multiply the fractional abundance with the mass. All the fractional abundance should add up to 100%.
5) Average atomic mass of Mg
= 78.7%× 23.985 +10.13% ×24.986 +11.17% ×25.983
= 24.3 amu (3 s.f.)
6) Avg atomic mass
= 37.85% ×191 +62.42% ×193
= 193 amu (3 s.f.)
7) Avg atomic mass
= 7.59% ×6.015 +92.41% ×7.016
= 6.94 amu (3 s.f.)
*amu stands for atomic mass units
I’ve been trying to figure this out for a few hours
Answer:
12) 55.8 amu (3 s.f.)
13) 0.99 amu (3 s.f.)
14) 12.035 amu
Explanation:
Please see attached picture for full solution.
Uranium-238 had a half life of 4.5 billion years. A 100 g sample of U-238 has decayed until only 25 g remain. How long did it take for the sample to decay? (Write the answer in “n billion years”)
awnseris chemical hhhh Explanation:
Help this due today
Answer:
the question makes no sense and I'm on my forth year of college
What is the relationship of the number of valence electrons of neon and argon?
Explanation:
Valence electrons of Ne, Ar are the same = 8
because they are in VIIIA or inert gas
WHERE DOES THE REST OF THE ENERGY (90%) GO?
Answer:
The rest of the energy is passed on as food to the next level of the food chain. The figure at the left shows energy flow in a simple food chain. Notice that at each level of the food chain, about 90% of the energy is lost in the form of heat.
A certain liquid has a density 0.80g/ml. What is the mass of a 40 ml sample of this liquid
Answer:
32
Explanation:
0.80 x 40= 32
density = mass/volume
mass= density x volume
What do physicists study? O A. Economics O B. The properties of matter C. Living things D. How matter and energy interact
3) (4.5 x 10-14) x (5.2 x 103) = ?
Answer:
16603.6
Explanation:
(4.5 x 10 -14) x (5.2 x 103)
(45 - 14) x (535.6)
31 x 535.6
16603.6
Which statement about gases is true?
They are made up of particles that always move very slowly.
They are made up of particles that travel in a curved path when in motion.
They are made up of hard spheres that vibrate quickly in stationary positions.
They are made up of hard spheres that are in random motion.
Answer:
they are made up of hard spheres that are in random motion
Answer:
D) They are made up of hard spheres that are in random motion.
Explanation:
Calculate 5+7*3*
Your answer:
A scientist discovers a deep bowl-like divot under the ocean off the coast of eastern Mexico that is many kilometers across. The layers of the ground all around the continent from around the time that structure formed contain large amounts of iridium and a larger number of fossils than is normally found. What most likely caused the bowl-like structure?
a meteorite impact
an asteroid impact
an iridium spike
a Kuiper object impact
Answer:
an asteroid impact or B
Explanation:
An asteroid impact most likely caused the bowl-like structure. Hence, option B is correct.
What is divot or bowl like structure?A divot are the marks made in the grass on the golf course. So, scientist named a bowl like structure form in under the ocean off the coast of eastern Mexico.
An impact event is a collision between astronomical objects causing measure effect.If the asteroid hits on land of the earth there will be the huge amount of dust thrown up into the atmosphere.If it hits water, then there would be an increase in water in the atmosphere.Example: the impact of asteroid ended the age of dinosaurs a 66 million years ago.
It kills more than 75 percent of earth species.The asteroid impact in ocean made bowl type structure called divot these kilometers in size so big as compared to a football ground.
An asteroid impact most likely caused the bowl-like structure. Hence, option B is correct.
Learn more about asteroid impact. here:
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dsses
Question 5 (1 point)
All of the following are steps in the scientific method except
developing a model based on experimental results.
b observing and recording data.
discarding data inconsistent with the hypothesis.
forming a hypothesis.
I NEED HELP ASAP PLEASE
Luca see snow melting from a roof as the sun comes out. Later he notices that the melting snow froze into icicles during the cold night. How is energy related to these changes of state?
A. Thermal energy affects the difference in freezing points.
B. Thermal energy is absorbed during melting, and then is released as it freezes.
C. The amount of thermal energy absorbed is affected by low melting points.
D. Thermal energy flows from cold objects to hot objects as they freeze.
I’ll mark you brainliest
Answer:
the answer is A your welcome
What is a more modern device that measures mass?
Answer:
Digital scales /weight scales (the stuff you weigh yourself to see how much lbs you are)
Explanation:
Elements are organized on the periodic table based on their properties. Which statement correctly predicts and explains the chemical reactivity of two different metals? Barium (Ba) is less reactive than calcium (Ca) because the valence electrons in calcium atoms are farther from the nuclei and harder to remove. Strontium (Sr) is more reactive than magnesium (Mg) because the valence electrons in strontium atoms are farther from the nuclei and harder to remove. Rubidium (Rb) is more reactive than sodium (Na) because the valence electrons in sodium atoms are closer to the nuclei and easier to remove. Lithium (Li) is less reactive than potassium (K) because the valence electrons in lithium atoms are closer to the nuclei and harder to remove.
plz answer asap
Answer:
Lithium (Li)
Explanation:
The periodic table is the representation of the elements. According to the table, Lithium is less reactive than potassium because of the valence electrons. Thus, option D is correct.
Why is lithium less reactive?Lithium and potassium both are elements arranged in the periodic table and are placed in the same group I. The atomic number of lithium is 3, while potassium is 19.
The reactivity depends on the atomic size of the element and increases when one moves down in a periodic group. In group I, lithium has a small size as valence electrons are closer to the nucleus and harder to remove.
On the other hand, potassium has a higher atomic number and a larger size making its valence electron to be located at a larger space making them get easily eliminated.
Therefore, lithium is less reactive than potassium.
Learn more about reactivity and lithium here:
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Read the excerpt from Harriet Tubman: Conductor on the Underground Railroad. She started talking about William Still and the Philadelphia Vigilance Committee. No one commented. No one asked any questions. In this excerpt, which rhetorical appeal is Tubman attempting to use to convince people to continue? Ethos, because she is using her own knowledge as a tool. Pathos, because she is appealing to her audience's needs. Ethos, because she is appealing to their emotional needs. Pathos, because she is using facts to convince her audience.
Answer:
Ethos, because she is using her own knowledge as a tool.
Explanation:
Harriet Tubman was an activist and served as a spy for Union Army. 'Harriet Tubman: Conductor on the Underground Railroad' is a book written by Ann Petry narrating the accounts of life of Harriet Tubman who helped free 300 slaves using the paths of Underground Railroad.
In the given excerpt, Tubman has used the rhetorical appeal of 'ethos' as she is using her own knowledge as a tool. While rescuing slaves using Underground Railroad, Tubman made up several stories to keep the slaves moving and encourage them in their paths of freedom. The path for freedom was dangerous, and Tubman knew that some may back up from this, so she kept telling them about people who chose to struggle for freedom, made up stories about them and used this knowledge as a tool to keep the slaves encouraged and motivated. And no one asked her even one question as they trusted her (credibility-- element of ethos).
Thus, the tool Tubman has used in the given excerpt is ethos.
Answer:
A
Explanation:
Is an apple seed a compound or a mixture?
Answer:
Compound
Explanation:
compound: Substance that is made up of more than one type of atom bonded together
mixture: a combination of two or more elements of compound which are not chemically bonded
SIMPLE QUESTION WORTH 25 PTS :) If water has a density of 1g/ml and gold has a density of 19.3 g/ml. Will gold float or sink in water?
Explanation:
All substances that have a density greater than that of water will sink into the water since they are heavier and those less than water will float on it since they are less than that of water
From the question
Comparing the two values the density of gold is greater than that of water therefore the gold will sink into the water
Hope this helps you
Those who practice a pseudoscience (e.g. astrology, biorhythms, etc.) are those who... do not claim to be scientific and do not follow the rules of science none of these. claim to be scientific, yet do not follow all the rules of science attempt to follow the rules of science, but make mistakes in the process
Answer:
claim to be scientific, yet do not follow all the rules of science
Explanation:
Pseudoscience as the name implies "pseudo=false" means false science. It is a practice which poses itself as being scientific but does not conform to scientific principles or methods. In other words, they claim to be scientific but in the actual sense, they are not because they do not follow the rules guiding scientific knowledge.
Examples of pseudoscience as stated in the question are astrology, biorhythms. These ideas or studies are not subject to principles that qualifies them to be scientific.
How do I identify the mass of an atom
Explanation:
You multiply the atomic weight and I believe the protons.
convert 175 lbs to kg
Who was the first chemist to organize elements by atomic number?
Answer:
chemist Dimitri Mendeleev
XxAnimexXAnswer:
Chemist Dimitri Mendeleev
Explanation:
He started the development of the periodic table, arranging chemical elements by atomic mass.
Please help me do this question
How many pages is 5000 words? Double spaced, 5000 words is around 20 pages; single spaced about 10 pages. Now, if you're using an unconventional formatting or margins you could see different results, however, with standard word processor defaults and a 12 point Arial or Times New Roman font your output should be very similar. Examples of 5000 word count pages include college theses, dissertation research, or very comprehensive, in-depth blog posts.
Answer: 5000 words is 10 pages single spaced or 20 pages double spaced.
Pages by Word Count
Use our handy table to discover how many pages a given word count yields, single or double spaced, in Times New Roman or Arial 12 point font.
Word Count Pages (single spaced) Pages (double spaced) Font Size
250 WORDS ½ PAGE 1 PAGE 12 POINT
300 WORDS ⅔ PAGE 1⅓ PAGES 12 POINT
400 WORDS ⅘ PAGE 1⅗ PAGES 12 POINT
500 WORDS 1 PAGE 2 PAGES 12 POINT
600 WORDS 1⅓ PAGE 2⅔ PAGES 12 POINT
750 WORDS 1½ PAGES 3 PAGES 12 POINT
800 WORDS 1⅗ PAGES 3⅕ PAGES 12 POINT
1000 WORDS 2 PAGES 4 PAGES 12 POINT
1200 WORDS 2⅖ PAGES 4⅘ PAGES 12 POINT
1500 WORDS 3 PAGES 6 PAGES 12 POINT
2000 WORDS 4 PAGES 8 PAGES 12 POINT
2500 WORDS 5 PAGES 10 PAGES 12 POINT
3000 WORDS 6 PAGES 12 PAGES 12 POINT
3500 WORDS 7 PAGES 14 PAGES 12 POINT
4000 WORDS 8 PAGES 16 PAGES 12 POINT
5000 WORDS 10 PAGES 20 PAGES 12 POINT
6000 WORDS 12 PAGES 24 PAGES 12 POINT
7500 WORDS 15 PAGES 30 PAGES 12 POINT
8000 WORDS 16 PAGES 32 PAGES 12 POINT
10000 WORDS 20 PAGES 40 PAGES 12 POINT
Word Counter
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RELATED
How Many Pages is 4000 Words?
How many pages does 4000 words equal? Single spaced, 4000 words would produce about 8 pages; double spaced around 16 pages.
How Many Pages is 300 Words?
How many pages is 300 words? The answer is close to two-thirds of a page single spaced, and around one and one-third of a page double spaced.
How Many Pages is 400 Words?
How many pages does 400 words take? A word count of 400 words will result in around four-fifths of a page single spaced and and one and three-fifths of a page double spaced.
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Which of the following is a chemical property? A. Boiling point B. Electrical conductivity C. Flammability D. Malleability
Answer:
c
Explanation:
The one that is chemical property is flammability. The correct option is C.
What are chemical properties?Chemical properties are those properties that do not change by changing the size or shape of the elements. They are the quality that can only be formed by altering a substance's chemical identity is referred to as a chemical property, and it can occur during or after a chemical reaction.
The main chemical properties are flammability, pH, toxicity, reactivity, etc. Flammability is a property of the burning of an element. If a substance burns quickly and readily, it is flammable. If a substance does not burn quickly and readily, it is called inflammable. Some substances are wood, methanol, etc.
Thus, the correct option is C. Flammability.
To learn more about chemical properties, refer to the below link:
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Acid base reaction is also called neutralization reaction why?
Answer :
When an acid and a base react, the reaction is called a neutralization reaction. That's because the reaction produces neutral products. Water is always one product, and a salt is also produced. A salt is a neutral ionic compound.
