Answer:
Atoms is the smallest unit of a chemical element and consist of three main components protons, neutrons, and electrons.
The number of a neutron is based on the difference between the mass number of the atom (M) and the atomic number (Z). every isotope of an element has a different number of neutron.
But in a neutral atom or average atom, the number of neutrons is equal to the number of protons and the number of electron.
Example of the number of neutrons in an average atom: In Nitrogen-14, the atomic number and the number of protons is 7, it means the number of neutrons will also 7.
What is the harm done to the environment called
Which branch of chemistry studies substances containing carbon?
(3 puntos)
organic
theoretical
analytical
physical
inorganic
biochemistry
Explanation:
Organic........you cholo
3
Calcium oxide is made from the thermal decomposition of calcium carbonate: CaCO3 CAO + CO2
a) Calculate the maximum mass of calcium oxide that could be formed from heating 500 g of calcium
carbonate.
Answer:
Explanation:
n CaCO3 = mass / m.wt
= 500 /( 40 + 12 + 16x 3)
= 5 mole
n CaO = 5 moles ( from the balanced equation we have 1:1 moles )
mass of CaO = nCaO X m.wt
5 x( 40 +16 )
= 280 grams
EMERGENCY PLEASE HELP DUE IN 5 MINS!!! would your mass and weight differ on the Moon? The gravitational force of the Moon is one-sixth the gravitational force on Earth.
Answer:
Our weight on the moon is less than it would be on Earth due to a difference of the strength of gravity on the moon. The moon's gravitation force is determined by the mass and the size of the moon. ... This means that if you went to the moon you would weigh less, even though your mass stays the same!
Explanation:
The mass and weight of a person would be less on the moon on the earth because the gravitational force on the moon is less than that on the earth.
What is gravitational force?Gravitational force is the one by which all things pull onto the ground. It pulls everything towards itself. Gravity is present everywhere, but not in the same amount.
Gravity defines the weight of an object. On Earth, the weight is an object would be higher, than the planet, like Mars and the moon. The earth revolves on its axis and around the sun due to gravitational force.
The moon has a smaller mass than the earth and its pulling gravitational strength is also less, which is 1/6th of the earth.
Thus, Due to the moon's lower gravitational pull than the earth's, a person would have a lower mass and weight on the moon.
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. SE7.12D Which of the following statements accurately represents the differences in
plant and animal cells?
Only plant cells have a cell wall, chloroplasts, and a large vacuole.
Only animal cells have a cell wall, chloroplasts, and a large vacuole.
Only plant cells have a cell membrane, mitochondria, and cytoplasm.
Only animal cells have a cell membrane, mitochondria, and
cytoplasm.
CLEAR ALL
Only plant cells have a cell wall, chloroplasts, and a large vacuole.
I hope this helped :)
Features which are found in plant cells only are the chloroplast, large vacuole and cell wall.
Plants and animal cells consists of the following parts ; Mitochondria, cell membrane, vacuole, cytoplasm and so on. The vacuole present in animal cells are much smaller than those found in plant Cells. Hence, vacuole in animal cells are called small vacuole Plant cells also consists of cell wall, chloroplast and a large vacuole. All these are missing in animal cells.Therefore, Only plant cells have "a cell wall, chloroplasts and a large vacuole."
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What is an example of a testable hypothesis?
Definition of malleable? And example
The rate of geologic processes can happen quickly or take a long time.
Answer:
Take a long time
Explanation:
Geology is defined as a science mostly concerned with the study of the history of the earth as recorded in different rocks formations.
Geologic processes are events that occur on a geological timescale which may span across many centuries.
The four major geologic process are known to include; impact cratering, volcanism, tectonics, and erosion.
Answer:
true
Explanation:
18) Why are the large oak trees so important for storks? Where are
they found?
1
Answer: Storks are found in medium to tall trees that occur in stands located either in swamps or on islands ... also an important feeding habitat for the nesting birds. ... six percent in dead oaks
Explanation: There important because Storks only live in these types of trees
Vote me for brainliest!!!!
Students were creating flashcards to help them remember the advantages and disadvantages of petroleum. Which student's flashcard is correct? Question 6 options: a) Student A: Petroleum is a solid fossil fuel that can be used to make plastics. It is the most polluting fossil fuel. b) Student B: Petroleum is an energy-rich fossil fuel used to make gasoline. It can cause environment damage if it spills or is burned. c) Student C: Petroleum is a gas that burns cleanly and is used to generate electricity. It has to be drilled from under the ocean floor. d) Student D: Petroleum is a type of biomass that is cheap and available most everywhere. It can create greenhouse gases when burned.
Answer:
C
Explanation:
I think its correct because I think c is the right answer
Which measurements shows the correct degree of the precision for this ruler?
Answer:
The answer is "13.25 cm"
Explanation:
When the lengths of being in an entity were also documented by either a cm-length ruler in 2 decimal positions. These measurements showed the decimal point, 13.25 cm possess 2 decimal roles, and 0 decimal places that is equal to 130 or 132 cm. It is the right choice is therefore 13.25 cm, because it takes two decimals and this is more accurate.
Answer:1.5 cm
Explanation:edge2020
Dr.Okoh has a steel beam with a volume of 35cm to the third power and a mass of 1040g. Find the density
Answer:
The answer is
29.7 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} [/tex]
From the question
mass of steel beam = 1040 g
volume = 35 cm³
The density of the steel beam is
[tex]density = \frac{1040}{35} \\ = 29.714285...[/tex]
We have the final answer as
29.7 g/cm³Hope this helps you
Similarities between homogeneous and heterogeneous
Answer:
heterogeneous mixtures are mixtures that you can see the different compounds in them, homogeneous mixtures are mixtures that have different compounds in them but are not visible. they both have different mixtures or compounds in them.
Explanation:
Write the electron configuration for an atom that has 17 electrons.
Which is an example of how society affects science?
1.Laws have been passed banning the production of a living copy of a person.
2.Prices of prescription drugs have increased dramatically over time.
3.A girl has decided to bake a cake for her sister's birthday.
4.Some people enjoy watching stars and planets in the night sky.
Answer: Laws have been passed banning the production of a living copy of a person.
i just took the test so i know the answer is correct.
Answer:
The answer is A.
Explanation:
I just did the edgunuity test.
A test tube can be used to hold
A
more concentrated solutions than a beaker holds.
B
larger amounts of chemicals than a beaker holds.
с
smaller amounts of chemicals than a beaker holds.
D
less dangerous substances than a beaker holds.
What is earth science? What are the four major areas of earth science
Earth science can be described as the study of the structure of the earth, its properties, process, and 4.5 billion of biotic evolution. The four major areas of earth science are geology, oceanography, meteorology, and astronomy.
Why the studies of earth science are important?Earth science also known as geoscience includes all fields of natural science related to the Earth. This branch of science deals with the physical, chemical, and biological complex constitutions and linkages of the biosphere, atmosphere, hydrosphere, and geosphere.
Earth sciences include the study of geology, lithosphere, as well as the atmosphere, hydrosphere, and biosphere. Earth scientists use geology, oceanography, meteorology, astronomy, chronology, geography, physics, chemistry, biology, and mathematics to build an understanding of how Earth works and evolves.
Meteorologists study the weather and watch for dangerous storms while Hydrologists analyze water and warn of floods. Geologists study rocks and locate useful minerals and stones.
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what are some physical propeties of copper?
Put appropriate exact correct answers due in 10 mins
*please note that if you put incorrect and inappropriate answers I won't mark as braninlist I will report answer*
Answer:
Explanation: Reddidh colour
bright metallic luster
malleable and ductile
good conductor of heat
Answer:
Copper has a melting point of 1083.4 +/- 0.2°C, boiling point of 2567°C, specific gravity of 8.96 (20°C), with a valence of 1 or 2.
Copper is reddish colored and takes a bright metallic luster.
It is malleable, ductile, and a good conductor of electricity and heat
Identifying Physical and Chemical Properties
Ques: how to identify physical or chemical properties
Ans: you can identify them by their properties. make sure that it matches its property. but you must know the physical and chemical properties . i will give an example .so how to identify boiling of eggs and changing of water into ice. Physical properties
-it can be reversed back
-it is temporary change
-no new substance is formed
chemical properties
-it cannot be reversed back
-it is permanent change
-new substance is formed
now boiling of eggs matches all property of chemical change so it is chemical change. changing of water to ice matches all property of physical change so it is physical change.
hope it helps
47.0 mL of an HBr solution were titrated with 37.5 mL of a 0.215 M LiOH solution to reach the equivalence point. What is the molarity of the HBr solution?
Answer:
0.172 M
Explanation:
M1V1=M2V2
(x)(47.0mL) = (37.5mL)(0.215M) solve for X
Answer: 0.172
Explanation:
How does an area’s climate determined
Answer:
The simplest way to describe climate is to look at average temperature and precipitation over time. Other useful elements for describing climate include the type and the timing of precipitation, amount of sunshine, average wind speeds and directions, number of days above freezing, weather extremes, and local geography.
Explanation:
hope it helps
is the capacity to do work or to produce heat.
Answer:
Energy is the ability to do work or to produce heat.
Use the periodic table to match each of the following element symbols to its name, atomic mass, or atomic number Match B) 32.06 (atomic mass) c) 14 (atomic number)
I need help with the same thing
Not sure if you need the answer anymore but...
Sp is A (antominy)
S is B (32.06 u)
Si is C (14)
Hope I helped anyone who needed this answer!
What is the unit of measure for energy? watt newtons joules meters per second
Answer:
c. Joules
Explanation:
I went over this already
Based on scientific information and records, the unit of measurement for energy is called: C. Joules.
What is energy?Energy can be defined as the ability of an object or body to do work. Thus, energy must be possessed or transferred to an object or physical body before it can be used in doing a work such as heating a system.
In Science, Joules is the standard unit of measurement for energy while Newton is the unit of measurement for force. Also, Watt is the unit of measurement for power and meters per seconds is a unit for measuring the velocity (speed) of an object.
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How do Scientific laws and societal laws differ?
Answer:
Explanation:
scientific laws are not your everyday laws but society laws really have to be followed its whats keeps balance in this world
3. Three-quarters of the elements are ________________.
I saw someone do this but someone answered it with the wrong answer so please help me!!
Shemika is preparing for her birthday party. She made a punch by mixing pineapple juice, orange juice, and seltzer water in a pitcher. She made fruit salad by putting blueberries, apple chunks, and mango
chunks in a bowl. Which of the following is true about her snacks?
Both snacks are homogeneous mixtures
The punch is a heterogeneous mixture and the fruit salad is a homogeneous mixture.
The punch is a homogeneous mixture and the fruit salad is a heterogeneous mixture.
The punch is a solution and the fruit salad is a homogeneous mixture.
Answer:
C. the punch is a homogeneous mixture and the fruit salad is a heterogeneous mixture
Explanation: The punch is made from many juices meaning you could not physically separate it while you can do that with the fruit salad because it is chunks of fruit
Choose all answers that apply
PLZ HELP ASAP i am doing a test and i need help. I WILL BE DOING BRAINLIEST TO THE FIRST PERSON WHO REPLYS
When dynamite explodes, it releases a large amount of light and heat. This is an example of _____.
slow combustion
rapid combustion
an exothermic reaction
an endothermic reaction
a chemical change
a physical change
Answer
Rapid Combustion
Explanation:
An explosion is a combustion and a quick reaction, That makes it rapid
How do bananas ripe? don't google it PLz and if you do I know whats the google answer
Answer:
they ripe if they are alone and not eaten for a long time the thing that is making it keep going is called ethylene
During World War One, observation balloons were used in order to spy out enemy positions. An observation
balloon was filled with 0.50 atmospheres of Helium, 54.0 mm Hg of Nitrogen, and 0.400 atmospheres of
Hydrogen. What pressure in atmospheres was the balloon filled to?
Answer:
0.971
Explanation:
The pressure (P) in atmospheres (atm) the balloon was filled to will be
P = P1 +P2 + P3
where P1 is the pressure in atm of Helium (0.5 atm)
P2 is the pressure in atm of Nitrogen (X atm)
P3 is the pressure in atm of Hydrogen (0.4 atm)
The value of P2 provided in the question is in mmHg
To convert we have
1 atm = 760 mmHg
X atm = 54 mmHg
X = 54 × 1/760
X = 0.071 atm
Hence, P2 = 0.071 atm
Thus, from the formula earlier
P = 0.5 + 0.071 + 0.4
P = 0.971 atm
