Answer:
The independent variable is the height of the ball that bounces.
Placing a sample of iron (II) oxide into a graduated cylinder makes the water volume increase 12.0 ml. The weight of the sample is 76.6g. What is it’s density? (Round to the nearest hundredths)
Answer:
The answer is 6.83 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 iron (II) oxide = 76.6 g
volume = 12 mL
We have
[tex]density = \frac{76.6}{12} \\ = 6.3833333...[/tex]
We have the final answer as
6.83 g/mL to the nearest hundredthHope this helps you
Answer:
it 76.6
Explanation:
cause it is what it is
When Liza was reading over the “Best of Blueberries” article, she quickly changed the claim in the article that read “1 cup of blueberries contains around 180 calories” because 1 cup of blueberries actually only contains about 80 calories. What does Liza MOST LIKELY do for a living?
researcher/fact checker
copy editor
commissioning editor
editorial expert
Answer:
your Answer is The first one, Its A, resercher/ fact checker
Explanation:
Which element has a greater atomic radius? Fluorine or Potassium
Answer:
An atom is a basic unit of a chemical element, such as hydrogen, helium ... a fluorine atom since the three additional protons the fluorine has will pull its ... As an example, potassium (K) has a larger average atomic radius (
How do scientists classify matter
according to their physical and
chemical makeup ?
Answer:
Matter can be classified according to
physical and chemical properties. Matter is anything that occupies space and has mass. The three states of matter are solid, liquid, and gas. ... Pure substances can be either chemical compounds or elements.
where might u find examples of series & parallel circuits in everyday life
Answer: Here are some examples!
Explanation: An example of a series circuit is a string of Christmas lights. If any one of the bulbs is missing or burned out, no current will flow and none of the lights will go on. Parallel circuits are like the smaller blood vessels that branch off from an artery and then connect to a vein to return blood to the heart.
anywhere inside ur house lma.o.
If the approximate density of 6.5 L of ethanol is 0.79 g/ mL, what is the mass in grams?
Answer:
The answer is 5135 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
density = 0.79 g/mL
1 L = 1000 mL
6.5 L = 6500 mL
We have
mass = 0.79 × 6500
We have the final answer as
5135 gHope this helps you
If an atom has 14 protons, 13 neutrons, and 14 electrons, what is it?
-silicon-14
-silicon-13
-silicon-27
-silicon-28
-none of these
Answer:
cilicon 14
Explanation:
how many valence electrons does hydrogen have
Answer:
one valence electron
Explanation:
Each hydrogen atom has one valence electron and is univalent.
which element is most likely to have an oxidation number of -2?
A. F
B. NE
C. CA
D. O
Answer:
D. O
_________________________________
F ----------¢ - 1
Ne --------¢ 0
Ca --------¢ + 2
Answer:
D. O
Explanation:
I need help on this problem. I need it answered ASAP
Use this formula: Density = Mass/Volume
Given in the question:
Mass: 10g
Volume: 5cm3
The calculations:
Density = Mass/Volume
= 10/5
= 2g/[tex]cm^{3}[/tex]
Therefore, the density will be 2g/[tex]cm^{3}[/tex]
What is conserved in physical changes?
shape
energy
mass
density
Answer:
The answer is C.
Explanation:
By the Law of conservation of mass, when a element, or product undergoes a physical change, mass always stays the same.
Hope you have a good day.
During physical change the mass of the material remains conserved. The correct option is C.
What is physical change?Even before to and after a physical change, the material implicated is unique architectural the same.
Physical changes include texture, shape, heat, and the beginning of a change in the state of matter. The texture of a substance influences how it feels.
A physical change is simply a change in appearance. The situation has not changed since the change.
Physical change can be seen in the use of cutting paper, melting butter, dissolving salt in water, and breaking glass.
Mass is neither created nor destroyed in chemical or physical changes, according to the law of conservation of mass.
Physical changes occur when the phage of a substance changes without changing its chemical composition.
Thus, the correct option is C.
For more details regarding physical changes, visit:
https://brainly.com/question/17931044
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Which type of compounds are formed by ions that have opposite charges?
A. molecules
B. covalent
C. ionic
D. metallic
Answer:
c
Explanation:
if you need explanation, ask freely
A spectral line is read
to have a wavelength of 4700A. What is
this in meters?
Answer:
[tex]4.7 * 10^{-7} meters[/tex]
Explanation:
Angstrom can be defined as a metric unit of length for used for the measurement of the wavelength of light (optics) such as visible light, x-rays, ultraviolet light, gamma rays etc. The symbol for Angstrom is "A" and it is named after the 19th century physicist from Sweden, named Anders Jonas Angstrom.
Given the following data;
Wavelength of spectral line = 4700A
To convert this value to meters;
One Angstrom is mathematically equal to [tex] 10^{-10} meters [/tex]
[tex] 1 Angstrom = 10^{-10} meters[/tex]
[tex] 4700 Angstrom = X \; meters[/tex]
Cross multiplying, we have;
[tex] X = 4700 * 10^{-10}[/tex]
X = [tex]4.7 * 10^{-7} meters[/tex]
Therefore, 4700A is equal to 4.7e-7 or 0.00000047 meters.
what other substances are considered pure substances
Explanation:
B and C they are the pure substances
Elements are considered as pure substances . Elements are mostly metals, non - metals and metalloids , so option C is right.
What are Elements ?An element is a substance that cannot be broken down by non - nuclear reaction. Elements considered as a pure substance . All elements are mostly pure substances. A few of them include gold, copper, oxygen, chlorine, diamond, etc. Compounds such as water, salt or crystals, baking soda amongst others are also grouped as pure substances.
An element is a fundamental item that cannot be easily broken in smaller pieces. There are about 100 elements ,each with it's own types of atom. Everything in universe contain an atom of at least on or more than one elements.
Elements are pure substances ,hence option C is correct.
To learn more about elements refer the following link;
https://brainly.com/question/14347616
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The weather changed from cold to warm. Jessica was excited because should could wear her new flip flops and shorts to school. She had her science laboratory later in the day.
What should she do to be safe?
A chemical reaction takes place to allow hand warmers to give off heat. This is an example of a(n) __________.
A. physical change
B. exothermic reaction
C. endothermic reaction
D. precipitate
Answer:
Exothermic
Explanation:
Exothermic reactions release heat, endothermic absorb heat, and precipitate is a solid formed from a solution
Answer:
B.
Explanation:
Gives off heat,.
Which is responsible for an atom’s identity?
A.Protons
b.Electrons
c.Neutrons
d.Valence electrons
I need help with 2, 3, and 4 please help i will give the brainliest
Answer:
2=2.28*10^5
3=3.98*10^3
4=5.76*10^3
Identify the group number of following oxides/hydrides in Mendeleev
periodic table:
i) R2O3 ii) R2O iii) RO2 iv) RH2 v) R2O7 vi) RH3
Answer:
See explanation
Explanation:
The oxides or hydrides are formed by exchange of valency between the two atoms involved. The group of the atom bonded to oxygen or hydrogen in the binary compound can be deduced by considering the subscript attached to the oxygen or hydrogen atom.
Now let us take the journey;
R2O3- refers to an oxide of a group 13 element, eg Al2O3
R2O - refers to an oxide of group a group 1 element e.gNa2O
RO2 - refers to an oxide of a group 14, 15 or 16 element such as CO2, NO2 or SO2
RH2 - refers to the hydride of a group 12 element Eg CaH2
R2O7 - refers to an oxide of a group 17 element E.g Cl2O7
RH3- refers to a hydride of a group 13 element E.g AlH3
many reactive chemicals are stored in containers filled with Argon gas for safekeeping what about Argon's atomic structure makes it safe to store reactive chemicals in?
Answer:
Argon has 8 valence electrons making it non reactive.
Explanation:
Reactive chemicals are store in containers filled with Argon gas because the argon gas is non reactive. This is true because the argon gas has completely filled octet structure.
This can further be explained by writing the electronic configuration of argon.
The electronic configuration of argon is given below:
Ar (18) => 1s² 2s²2p⁶ 3s²3p⁶
Valence electron => 3s²3p⁶ = 2 + 6 = 8
From the above illustration, we can see that the outermost shell (i.e 3s²3p⁶) is having 8 electrons indicating that it is completely filled as the maximum number of electrons any shell can accommodate outside the first shell is 8 electrons. Thus, argon has 8 valence electrons ( i.e electrons in the outermost shell) and hence it is non reactive as the outermost shell is completely filled.
Electrons have single negative charges. What does this mean?
what is irons number
Answer:
Iron's atomic number is 26
Explanation:
Can someone please explain to me how I’m supposed to figure out the element with these configurations??
What was the most likely problem with the first set of
data?
O It was inadequate.
O It was false.
O It was recorded by one person.
O It was not recorded in a lab.
Answer:
it is A
Explanation:
What term describes the smallest unit that can perform all of the functions necessary for life
Answer:
Cell
A cell is the smallest unit of a living thing. Cells are the basic building blocks of all organisms
The density of a pillow is greater than the density of a rock. Is this true of false
Answer:
I think it's false it helps you...... Thank you ☺️☺️Pleaseee help meeeeeee
Answer:B
Explanation:
Heat boils it will get hot no heat/cold will freeze
Which of the following forces weathers objects by expanding and changing shape?
Moving water
Wind
Plants
Ice
1. John travels from the United States to Australia for the winter, but when he gets there it feels more like summer. Why?
Answer:
In Australia, it's warmer than most of the United States during winter.
Explanation:
Calculate the mass of the following:
9.11 mol He
Answer:
36.44 g of He
Explanation:
To convert from moles to grams, you simply multiply by the atomic mass. The conversion table looks like the following:
[tex]\frac{9.11 mol}{1}[/tex] * [tex]\frac{4.00 g}{1 mol}[/tex]
The mol units then cancel, and you are left with 36.44 g of Helium.
