Answer:
Because that indicates that something is not stable. (im pretty sure that's the reason. Im not fully sure. Good question!)
Explanation:
When dealing with Atoms, what does MAN mean?
Answer:
when dealing with atoms man means man-made because man means man-made
Hi ,do you like dino nuggets?
Is 4H2O an organic molecule ?
Answer:
it is an organic molecule
Explanation:
it's a compound called chromium, phosphate tetrahydrate, where tetra stands for 4 , as there are four water molecules attached to the compound.
I need help with problems 11-13 please. I’m very confused on how to find Volume when there’s no specific shapes and numbers.
Answer:
To find volume you can either look at the displacement of the water or Length•Width•Height
Explanation:
11) 12
12) 340 mL
13) 196 m\
Will a crayon dissolve in water?
Answer:
Yes
Explanation:Like wax crayons but they can dissolve in water.
Answer:
ye bit
Explanation:
Is copper penny react
reaction with Nitric
acid a
Chemical or physical
Change?
Answer:
The reaction that occurs is a redox reaction. The Copper metal (Cu 0)on the copper pennies is oxidized in concentrated nitric acid to produce Cu2+ ions. Copper is easily oxidized to Cu2+, which is blue in aqueous solutions (water) so you should see the solution turn blue as the copper penny reacts.
Have a nice day ;)(^-^)
Taking into account the definition of chemical and physical change, the reaction of the copper penny with nitric acid is a chemical change.
Physical changePhysical changes are those in which the substances involved are the same before and after the change. That is, a physical change is a transformation in which the nature of matter does not change.
Chemical changeChemical changes are considered to be those in which the substances involved are transformed into totally different ones.
In this way, the initial substances do not exist after the phenomenon has occurred and instead, new substances are formed, different from the initial ones.
That is, a chemical change is a transformation in which the nature of matter varies.
This caseWhen a penny of copper reacts with nitric acid, a redox reaction occurs where the copper metal in the copper pennies is oxidized to produce Cu²⁺ ions, whereas because the nitric acid oxidizes the copper, the nitric acid itself is reduced to nitric oxide (NO). Nitric oxide then reacts with oxygen in the air to produce nitrogen dioxide (NO₂). This can be represented by:
Cu + 4 HNO₃ → Cu²⁺(ac) + 2 NO₃⁻ + 2 NO₂ + 2 H₂O
Finally, the reaction of the copper penny with nitric acid is a chemical change because a redox reaction occurs.
Learn more:
https://brainly.com/question/2684420?referrer=searchResultshttps://brainly.com/question/13339068?referrer=searchResultsThe 3 particles of the atom are:
Answer:
proton,neutron and electron
Explain how critical thinking helps scientists analyze information for accuracy and bias.
Answer:
Explain how critical thinking helps scientists analyze information for accuracy and bias.
Explanation:
Critical thinking requires scientists to ask questions about information they come across and assess its validity. This facet of critical thinking helps them avoid bias that originates from personal opinion and helps them distinguish information and fact from common belief.
You are calling the telephone company to discuss your bill. Your expected wait time on hold is
20,000,000,000,000,000,000 fs.
(a) Convert this time to seconds and decide if you would be willing to wait this long.
(b) What is this length of time in minutes?
(c) What is this length of time in years?
Answer:
(a) 20,000 seconds
(b) 333.33 repeating minutes
(c) 0.0006341958 years
Chuck wants to know how many electrons in an atom are not paired up. Which model would be best for Chuck to write
out?
a set of quantum numbers for the last electron in the atom
a configuration with numbers letters and subscripts
a dot structure of the atom
an orbital notation of the atom
Answer:
D. an orbital notation of the atom
Explanation:
i took the test
Calculate the number of moles for 12.044*10^23 number of helium atoms
Answer:
Explanation:
number of moles=number of particle (atoms)/avogadro number (NA)
we know that avogadro number is equal to 6.23*10^23
given number of atoms=12.044*10^23
therefore
moles=12.044*10^23/6.23*10^23=1.9=2
You have 150 g of water (m). The specific heat of the water is 4.184 g/jC (c) . You heat the water and raise the temperature by 1 degree. How much heat did the water absorb?
Answer:
627.6J
Explanation:
q=mcΔT
where:
q = heat energy (J)
m = mass (g)
c = specific heat (g/j*C)
Δt = change in temperature (C/K)
q= (150)(4.184)(1) = 627.6
A different student is given a 10.0g sample labeled CaBr2 that may contain an inert (nonreacting) impurity. Identify a quantity from the results of laboratory analysis that the student could use to determine whether the sample was pure.
Answer:
Explanation:
It is density.
I do hope I helped you! :)
Question 4 (4 points)
(01.06 LC)
Water is an example of a mixture because it is made up of hydrogen and oxygen atoms bonded together. (4 points)
O True
O False
Answer:
False
Explanation:
The mixture is defined as a chemical substance formed by the combination of two or more substance but do not form any bond together.
Water is not a mixture because the water molecule is consists of two hydrogen (H2) atoms and one oxygen (O) atom bonded together with hydrogen bonds.
Hence, the given statement is "false".
Scientists have changed the model of the atom as they
have gathered new evidence. One of the atomic
models is shown below.
What experimental evidence led to the development of
this atomic model from the one before it?
A few of the positive particles aimed at a gold foil
seemed to bounce back.
The colors of light emitted from heated atoms had
very specific energies.
Experiments with water vapor showed that elements
combine in specific proportions.
Cathode rays were bent in the same way whenever
a magnet was brought near them.
Answer:
C)Equations were used to identify regions around the nucleus where electrons would likely be.
Explanation:
edgenuity 2020
Answer:
Equations were used to identify regions around the nucleus where electrons would likely be.....(C).....
Explanation:
hope this helps. the person above me is correct, the comments were looking for a different question
List the two factors used to calculate force ? (20 pionts)
Answer: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.
Explanation: i hope it answers your question
Answer:
blah blah blah
Explanation:
what happened to the color of the sand when it goes through filtration and is quantitative or qualitative
Answer:
Qualitative
Explanation:
I'm not sure if there was another part to the question, but if you are looking at the color of the sand, that is a qualitative observation.
Quantitative statements involve numbers. (Ex: The house has 4 bedrooms.) Qualitative statements describe characteristics. (Ex: The house is blue.)define radioactivity and write down properties of radioactive Ray's
Answer:
Explanation:
So basically is just explain what radioacitvity and then radidoactive
Radioactivity is the spontaneous release of energy from an unstable atom to get to a more stable state. Ionizing Radiation is the energy that comes out of a radioactive atom. Radioactive isotopes are radioactive atoms of the same element that have different numbers of neutrons.
Answer:
Radioactivity is the spontaneous release of energy from an unstable atom to get to a more stable state. Ionizing Radiation is the energy that comes out of a radioactive atom. Radioactive isotopes are radioactive atoms of the same element that have different numbers of neutrons.
❤❤❤❤❤❤
Explanation:
The density of manganese is 7.21 g/cm^3 . What is the density in kg/m^3 ? (dimensional analysis)
Answer:
7.21 x 103 kg/m3
Explanation:
Dimensional analysis has been the process to establish and convert the various units in the measurement. The density of manganese in kg/m3 is 7.21 × 10³ kg/m³.
What is dimensional analysis?Dimensional analysis has been the method that is also referred to as the unit factor or factor label method. It solves the mathematical expressions by multiplying the given value with another without changing its quantity and amount. It is used to change the units of the value.
Given,
Density of manganese = 7.21 g/cm³
The dimensional analysis method is used to convert grams per cubic centimeter into kilograms per cubic meter as:
1 gram / cubic centimeter = 1000 kilogram / cubic meter
So, 7.21 g/cm³ = X kilogram / cubic centimeter
Solving for X as:
X = 7.21 g/cm³ × 1000 kilogram / cubic centimeter
X = 7.21 × 10³ kg/m³
Therefore, 7.21 × 10³ kg/m³ is the density.
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difference between compound and element
Answer:
An element is a material that consists of a single type of atom. Each atom type contains the same number of protons. Chemical bonds link elements together to form more complex molecules called compounds. A compound consists of two or more types of elements held together by covalent or ionic bonds.
Explanation:
I hope it helped you
Wood has a density of 0.531 g/cm3. What is the volume of 44 grams of wood?
Answer:
The answer is 82.86 cm³Explanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\ [/tex]
From the question
mass of wood = 44 g
density = 0.531 g/cm³
It's volume is
[tex]volume = \frac{44}{0.531} \\ = 82.86252354...[/tex]
We have the final answer as
82.86 cm³Hope this helps you
If a substance has a mass of 12.50 g and takes up 3.4 mL of space, what is the density?
Answer:
The answer is
3.68 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} [/tex]From the question
mass of substance = 12.50 g
volume = 3.4 mL
The density of the substance is
[tex]density = \frac{12.50}{3.4} \\ = 3.676470588...[/tex]
We have the final answer as
3.68 g/mLHope this helps you
А
B
с
578 g
343 9
722 g
which is more dense?
Answer:
can you rephrase the question it is hard to understand
Cathy is reading a science article about exercise. She learns that exercise
causes a person to breathe faster. The next part of the article has the title
"Heart Rate." In that part of the article, Cathy is sure she'll read about how
exercise causes the heart to beat faster. What active reading strategy is
Cathy using?
A. Monitoring and applying fix-up strategies
O B. Summarizing
O C. Making predictions
D. Making mental images
Which of the following is an example of an intensive physical property?
a. boiling point
b. height
c. volume
d. none of the above is an example of intensive properties
e. all of the above are examples of intensive properties
Answer:
boiling point is an intensive property because it stays the same no matter the amount of an element or molecule
Explanation:
Environmental science is a *
A. narrowly defined set of physical, life, and social sciences.
B. subject that only deals with the environment.
C. collective of like-minded people that attempt to raise awareness and take action to protect our environment.
D. interdisciplinary subject used to gain knowledge about the environment.
How many sig figs are there?
4000.
The number of significant figures in 4000 is 1
1. A sample of oxygen (0.) gas has a mass of 32.65 g and a volume of 24.924 L. What is the density of the 0,gas?
Answer:
The answer is
1.31 g/LExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question
mass of oxygen gas = 32.65 g
volume = 24.924 L
The density of the gas is
[tex]density = \frac{32.65}{24.924} \\ = 1.3099823463...[/tex]
We have the final answer as
1.31 g/LHope this helps you
The liquid state of matter can be described as
Answer:
The liquid state of matter is an intermediate phase between solid and gas. ... Liquids will flow and fill the lowest portion of a container, taking on the shape of the container but not changing in volume. The limited amount of space between particles means that liquids have only very limited compressibility
Explanation:
A liquid is a nearly incompressible fluid with a nearly constant volume regardless of pressure that adapts to the shape of its container. It belongs to one of the four basic states of matter.
Volume retention and conformity to the shape of a liquid's container are two of its most noticeable physical characteristics. When a liquid substance is poured into a container, it conforms to the shape of the container and will stay inside the container so long as the liquid state persists.
The intermolecular forces of attraction in a liquid state of matter are stronger than those in a gaseous state but weaker than those in a solid state.
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Can someone help with this one I’m desperate
Answer:
C
Explanation:
im not that sure if its correct