Chemistry High School
Answers
Answer 1
Answer:
I think its D because a scientific reason should match the evidence and be logical, or they should at least match as much of the evidence as possible.
(I'm not 100% sure)
Related Questions
The smallest unit of an element that maintains properties of that element is called a(n)
A
neutron
B
proton
С
atom
D
electron
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Answer:
try c atom i hope this helps!! : )
Explanation:
Please someone help me ASAP I'm confused.
Answers
An element. Elements are found in the periodic table.
Which is more likely in a settled and sedentary community?
Answers
Answer:
lager population
Explanation:
Disease
Starvation
Larger population
All of the above
Are phase changes a physical change or a chemical change? Example: My icecream cone melted in the hot sun.
Answers
Answer:
physical
Explanation:
this kind of change can be undone, you can refreeze icecream.
Which event would be impossible to explain by using John Dalton's model of the atom?
O An iron atom emits particles when it is struck by light.
O An oxygen atom combines with two hydrogen atoms to form water.
O An acid reacts with a base to form salt and water.
O The atoms in sodium metal react with water.
Answers
John Dalton's atomic model explains the atom to be the indivisible particle. An iron atom emitting particles is impossible to explain by Dalton's atomic model. Thus, option A is correct.
What is Dalton's model of the atom?
Dalton gave the atomic theory and proposed that matters are made of atoms that are indivisible particles and cannot be penetrated. The models were based on the law of conservation of mass and various proportions.
The model was a failure as it was later discovered that sub-atomic particles are the units that make the atoms. The emission of the particles from the iron atom would not have been possible to be explained through Dalton's model as it didn't consider the sub-atomic particles.
Therefore, the emission from atoms cannot be explained by Dalton's model.
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Answer:
A: An iron atom emits particles when it is struck by light.
What are the physical properties of salt dissolved in water
Answers
Answer:
Why Dissolving Salt Is a Chemical Change
Therefore, dissolving salt in water is a chemical change. The reactant (sodium chloride, or NaCl) is different from the products (sodium cation and chlorine anion). Thus, any ionic compound that is soluble in water would experience a chemical change.
Explanation:
What unit is used to describe volume?
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Answer:
Explanation:
Hello friend!!!!!
here's ur answer
The unit to describe volume is cubic meter.
Hope this helps
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Peter ate junk food at breakfast and worried about the examination, which combined to give him an annoying case of acid indigestion. Suggest some ways of reducing the indigestion.
Answers
Answer:
Consumption of Antacid
Explanation:
At breakfast when Peter ate junk food , excess acid could have got released due to which he had got acidity in his stomach. By consumption of Antacid can reduce the effect of acidity because antacid is a mild base. When a mild base reacts with acid it neutralises the effect of acid & hence gives a relief from acidity...
The length of the Amazon River in South America is 6, 400 kilometers. What is the length written in scientific notation?
Answers
Answer:
A . 6.4 x 10 2 km B . 6.4.
Explanation:
The length written in scientific notation is 6.4*10^3 km.
What is Scientific notation?
It means that the way of expressing and mentioning the small or large kind of number in the decimal form. Here we simply multiplied the real number with the power of 10.
Since The length of the Amazon River in South America is 6, 400 kilometers.
So,
6400/1000 = 6.4
1000 = 10^3
So, it can be 6.4*10^3 km.
Therefore, The length written in scientific notation is 6.4*10^3 km.
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Which wave shown below would have the highest frequency?
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Hey, I don’t think this question can be answered without the pictures of the waves. If you could reupload this question with the pictures attached that would be great ;)
he metal used to recover copper from a solution of copper sulphate is ? ...
Answers
The answer is Iron
Iron is a more reactive metal than copper
Answer:
IRON
The metal used to recover copper from a solution of copper sulphate is? IRON.
4. How many minutes are there in 1.000 week?
please help
Answers
There are 10,080 minutes
There are 10,080 minutes in 1 week 1.1M minutes in 1,000 weeks
Each of the following values was read on an instrument of measuring device. In each case the last digit was estimated. Tell what divisions would have been made on the scale or measuring device.
example: 16.00 The scale read to tenths; hundredths were estimated
16 g
16.00 mL
160 cm
1600 g
160.0 g
Answers
16 g is the correct answer
Question 1 (1 point) What is white light? The type of light that is found in x-rays The type of light given off by the sun and light bulbs known as visible light. The type of light that is used in microwave ovens They type of light that makes up radio wave Submit
Answers
apparently colorless light, for example ordinary daylight. It contains all the wavelengths of the visible spectrum at equal intensity.
Hey there!!
Radio waves, on the other hand, have the lowest energies, longest wavelengths, and lowest frequencies of any type of EM radiation. In order from highest to lowest energy, the sections of the EM spectrum are named: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves.
Hope It Helped!~
JustinBiberLovers~
How many sig figs are in 70030?
Answers
Answer:
5
Explanation:
there are 5 s.f in 70030
Which three words best describe the composition of the inner planets? solid, smooth, giant rocky, solid, dense giant, dense, gaseous gaseous, smooth, smallWhich three words best describe the composition of the inner planets? solid, smooth, giant rocky, solid, dense giant, dense, gaseous gaseous, smooth, smallWhich three words best describe the composition of the inner planets? solid, smooth, giant rocky, solid, dense giant, dense, gaseous gaseous, smooth, smallWhich three words best describe the composition of the inner planets? solid, smooth, giant rocky, solid, dense giant, dense, gaseous gaseous, smooth, small
Answers
Answer:
solid, rocky, dense
Explanation:
The three (3) words which best describe the composition of the inner planets are: B. rocky, solid, dense.
The two types of planet.
Based on astronomical information and records, there are two (2) main types of planet and these include the following:
Outer planetInner planet
What is an inner planet?
An inner planet can be defined as a type of planet that is closest to the Sun and it's rocky, solid and dense in nature such as mercury, venus, earth and mars.
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3. Round 87.073 meters to three significant figures. Write your answer in scientific notation. Step 1: 87.073 rounds to _______ To round to three sigrtificant figures, round to the nearest tenth. Step 2. Write the number in scientific notation. _____meters
Answers
Answer:
see below
Explanation:
3. 87.073 meters to three significant figures.
= 87.1 meters
2. Write the number in scientific notation. _____meters
= 8.71 x 10 ¹ meters
Answer:
see below
Explanation:
a. 87.073 meters to three significant figures = 87.1 meters
b. Write the number in scientific notation. _____meters = 8.71 x 10^1 meters
HELP ME PLZ PLZ PLZZZZ
Describe how you think chemistry is related to living things.
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Living things are made of elements, especially C, H, O, N, P, and S. Living things are alive because of the chemical reactions that occur in their cells, such as cellular respiration and protein synthesis, among many others.
Every time that a person eats the saliva breaks down the food and also your teeth. Saliva also known as enzymes which is chemical.
How is a kilogram of cotton balls similar to a kilogram of bricks
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Answer:
because they are both a kilogram
Explanation:
Lanthanide:
tungsten
chromium
promethium
Answers
Answer:
promethium
Explanation:
edge2020
The answer on Edgenuity2020 is promethium
what is cell membrane???
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Answer:
The cell membrane is, The thin membrane that forms the outer surface of the protoplasm of a cell
Sandy went to the candy store and wanted to use dimensional analysis she had learned in class. She only had a certain amount of money to spend. In terms of price, she figured out the following: 6 lollipops = 5 gum balls, 10 lemon heads = 16 redhots, 8 gum balls = 9 lemon heads. If sandy knows she could buy 3 lollipops, how many lemonheads could she buy with the same money?
Answers
Answer:
about 1-60
Explanation:
Answer:
she could get 3.6 lemon heads so 3
A mixture in which the suspended particles are too small to be seen with the naked eye is a
Answers
Answer:
Colloid
Explanation:
Google and school taught me bud
I have about 20 min before this is due, pls help asap ^w^
Answers
Answer:
B
Explanation:
bc be need alot of fuels
what is quantitative data?
Answers
Quantitative data are measures of values or counts and are expressed as numbers. Quantitative data are data about numeric variables (e.g. how many; how much; or how often). Qualitative data are measures of 'types' and may be represented by a name, symbol, or a number code.
How many molecules are in 17 amu of ammonia, NH3?
A) 1.0 × 10²⁵
B) 2.0 × 10²⁴
C) 3.0 × 10²⁴
D) 6.0 × 10²³
Answers
1mole=6.023*10^23 NH3 molecules
6.0 × 10²³ are the molecules in 17 amu of ammonia, NH[tex]_3[/tex]. Therefore, the correct option is option D among all the given options.
What is molecule?
The smallest recognizable unit in which a pure material may be split while retaining its composition and chemical characteristics is a molecule, which is a collection of two or more atoms.
Until portions made up of single molecules are reached, the split of a sample of a substance into increasingly smaller parts does not result in a change in either its makeup or its chemical characteristics.
molar mass of 1 mole of ammonia = 17 amu
1 mole of any substance contains 6.0 × 10²³
6.0 × 10²³ are the molecules in 17 amu of ammonia, NH[tex]_3[/tex].
Therefore, the correct option is option D among all the given options.
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Neon atoms are known to produce a mass spectrum that consists of three peaks at m/z values of 20, 21 and 22, with the relative abundance of the peaks found to be in the ratio 112:0.21:11.1. Assuming the z value of the species causing the peaks to be +1 in each case, calculate the average atomic mass of neon based on these data.
Answers
Answer:
Explanation:
m / z = 20 , 21 , 22
m / 1 = 20 , 21 , 22
m = 20 , 21 , 22 .
ratio of isotopes = 112 : 0.21 : 11.1
Average atomic mass = (112 x 20 + .21 x 21 + 11.1 x 22) / (112 + .21 + 11.1 )
= (2240 + 4.41 + 244.2) / 123.31
= 2488.61 / 123.31
= 20.18
The accepted value for the molar volume of a gas is 22.4 L. Sarah's experimental data indicated that a mole of a gas had a volume of 19.6L. What was her percent error?
Answers
Answer:
Percent error = 12.5%
Explanation:
In a measurement you can find percent error following the formula:
Percent error = |Measured value - Accepted Value| / Acepted value * 100
Based on the data of the problem, accepted value is 22.4L and the measured Value (Value of Sara) was 19.6L.
Replacing:
Percent error = |Measured value - Accepted Value| / Acepted value * 100
Percent error = |19.6L - 22.4L| / 22.4L * 100
Percent error = |-2.8L| / 22.4L * 100
Percent error = 2.8L / 22.4L * 100
Percent error = 12.5%
How does the flow of energy during freezing compare with the flow of energy during melting
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Answer:
At the melting point, some molecules overcome the forces of attraction. Energy gained after the the solid melts increases the average kinetic energy or the temperature. When liquid is freezing the energy flows out the the liquid. As the kinetic energy decreases, they move more slowly.
Explanation:
The state of matter of the interior of the sun and other stars
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Answer: It is, as all stars are, a hot ball of gas made up mostly of Hydrogen. The Sun is so hot that most of the gas is actually plasma, the fourth state of matter. ... As we heat up liquid, the liquid turns to gas. Gas is the third state of matter
Explanation:
