Answers
Answer:
C
Explanation:
Particles inside the nucleus = protons + neutrons = mass number = 84
particles outside = electrons number = atomic number
Related Questions
The observed mass of the sun is 6.270 * 10 ^ 26 g but the actual mass of sun is 5.97*10^ 24 kg . The percent error in measurement is 4,78 %
Answers
Answer:
False hoge iska answer
Explanation:
Please follow me
guys please help i need to pass this!!
Answers
Answer:
Towards the center of the earth.
Explanation:
That is the gravitational pull for us on earth like we are pulled to the center of earth not the atmosphere high up in the sky hope this helps? I know you can pass this! You got it the fact that you got that far is proof.
Compound 2 contains 2.0g of hydrogen and 32.0g oxygen. What is the percent compound of each element?
Answers
Note down the formula below
[tex]\boxed{\sf Mass\%\;of\; element=\dfrac{Mass\:of\:the\: element}{Mass\;of\:the\: compound}\times 100}[/tex]
Mass of the compound
[tex]\\ \sf\longmapsto 32+2=34g[/tex]
Mass % of Hydrogen:-
[tex]\\ \sf\longmapsto \dfrac{2}{34}\times 100[/tex]
[tex]\\ \sf\longmapsto \dfrac{1}{17}\times 100[/tex]
[tex]\\ \sf\longmapsto 5.8\%[/tex]
Mass % of Oxygen:-
[tex]\\ \sf\longmapsto \dfrac{32}{34}\times 100[/tex]
[tex]\\ \sf\longmapsto \dfrac{16}{17}\times 100[/tex]
[tex]\\ \sf\longmapsto 94.2\%[/tex]
Be specific and shorten it in ur own words I’ll brainlist and rate u 5 star! :)
What are the 2 major steps involved in the breakdown of glucose to carbon dioxide; cellular respiration? Explain what happens in each step.
Answers
Glycolysis, the splitting of glucose into two 3-carbon molecules.
The citric acid or Krebs cycle, which produces CO2, NADH, FADH2, and ATP.
The properties of graphene are all of the following except this _______________.
a
high electrical conductivity
b
flexible
c
one layer of atoms thick
d
highly reactive
Answers
Answer:
I think it's a flexible
I hope it's helps you
Hi, I need help please :)
Answers
You decide to clean the bathroom. You notice that the shower is covered in a strange green slime. You decide to try to get rid of this slime by adding lemonade juice. You spray half of the shower with lemonade juice and spray the other half of the shower with water. After 3 days of spraying equal amounts 3 times a day, there is no change in the appearance of the green slime on either side of the shower. How many trials are being performed in this example?
Answers
Answer:
3
Explanation:
A gas has a density of 5.56 g/L. What would the mass in kilograms of 1 m^3 of this gas
Answers
Answer:
Mass is 5560 grams
Explanation:
[tex]{ \boxed{mass = density \times volume}}[/tex]
Density is 5.56 g/L
Volume is 1 m³ = 1,000 L
Substitute the following to get mass:
[tex]mass = (5.56 \times 1000) \\ { \boxed{ \boxed{mass = 5560 \: grams}}}[/tex]
Which best describes this compound
Answers
Answer:
There is nothing to see
Explanation:
You didnt add the image
A 147g piece of metal has a density of 7.00g/mL. A 50mL graduated cylinder contains 20.0mL of water. What is the final volume after the metal is added to the graduated cylinder
Answers
Answer: 41.0 ml
Explanation: (147g/7.00g/ml) = 21.0 ml for the metal
Add to 20.0ml to reach 41.0 ml to 3 sig figs
Que significa HI en educación ambiental
Answers
Answer:
Um... Hello in environmental education. i think that what u said :)
Explanation:
Help me with physical science
Answers
Answer:ok
Explanation:fish
When using an electronic device, such as an electronic balance, the measurement displayed on the screen is assumed to have one estimated digit included. in fact, you'll often sec the estimated digit changing rapidly, because there is fluctuation in the estimate. Explain why it is important to record the zero in the measurement shown to this right,
Answers
The zero calibration of the electronic balance allows to maintain the precision of one digit.
Electronic measurement equipment has a mechanism to set the zero of the measurement every time the equipment is turned on, this procedure must be carried out to eliminate:
Possible existence of some material on the plateChanges in the characteristics of the balance completes due to agingCchanges in ambient conditions, for example temperatureChanges in the mass of the plate due to deformation or breakage.
The methods of regurgitating the zero of the balance consists of measuring the weight without masses and bringing this value to zero, in general by changing some adjustable parameter of the balance, for example magnetic field current, reference level with a beam of light.
With this calibration it will be achieved that there is always a precision digit in the readings.
With Electronic Balance Calibration it is possible to have a pressure digit
learn more about electronic balance here:
brainly.com/question/13206375
Answer:
The zero is the estimated digit.
Explanation:
If the zero was left off of the measurement, people would assume the tenths place was the estimated digit.
Convert -8.0 degrees F to
degrees C.
Answers
Answer:
Its -22.222C
Explanation:
I hope its helpful.
Answer:
-22.222
Explanation:
:)
Air is made up of different gases, such as oxygen, nitrogen, and carbon dioxide.
Which statement best describes these three components of air?
Oxygen, nitrogen, and carbon dioxide are all classified as pure substances.
Oxygen, nitrogen, and carbon dioxide cannot react with another substance.
Oxygen, nitrogen, and carbon dioxide are chemically bonded to one another.
Oxygen, nitrogen, and carbon dioxide can be classified as elements.
Answers
Answer:
they’re all pure substances. Carbon dioxide is not an element
Explanation:
example of electrovalent bond
Answers
Explanation:
MgCl2, CaCl2, MgO, Na2S, CaH2, AlF3, NaH, KH, K2O, KI, RbCl, NaBr, CaH2 etc.hope it helps.stay safe healthy and happy..what discovery was a minor help in the development of the periodic table?
Answers
Answer:
In 1932 James Chadwick first discovered neutrons, and isotopes were identified
Explanation:
Stars with a greater overall mass are and , and they consume their nuclear fuel .
Answers
Answer:
they will expand
Explanation:
as they bring out they become red giants then eventually white dwarfs or the scarier options a black hole
Why is it impossible for an element to have an atomic number of 110.5?
a. atoms of an element have the same whole number of protons and neutrons
b. atoms of an element all have the same whole number of protons
c. exactly half of the isotopes would need an atomic number of 110 and half would need an atomic number of 111 which is very unlikely
d. atoms with atomic numbers greater than 100 are unstable
Answers
Answer: B
Explanation: The atomic number is based only on the number of protons in the nucleus of an atom. Since this is a count of whole numbers, it cannot be a decimal. It's either element 110 or 111, not 110.5.
Answer:
B
A
C
A
C
These should be the answers for your test. If you have any questions, please DM me
i need help guys hurry
Answers
Answer:
when an object is at sea level
Explanation:
wherever you are closest to the center of the Earth.
Water is an important molecule for life on Earth to exist. Water is known to have unique properties like high heat of vaporization that helps moderate the temperature of the ecosystem. It also has high surface tension and high boiling point. In relation to our topic, what do you think is behind the molecules of water that makes these properties possible? Explain and support your answer.
Answers
Hydrogen bonding in water molecules are responsible for the unique properties of water.
Water is a molecule composed of hydrogen and oxygen atoms. Oxygen is highly electronegative. This leads to the introduction of polarity in the O-H bond in water. Hydrogen bonding occurs in a molecule when hydrogen is bonded to highly electronegative atom.
As a result of this polarity and consequent hydrogen bonding due to the hydrogen - oxygen bond, water molecules have several unique properties such as high heat of vaporization, high surface tension and high boiling point.
Learn more; https://brainly.com/question/10904296
A car travels 4 miles in 0.08 hours. The speed of the car is miles/hr.
Answers
I don’t know how to explain it. Sorry :(
In a synthesis reaction, two atoms of sodium (Na) combine with one molecule of chlorine gas (Cl2) to produce sodium chloride (NaCl). How many molecules of sodium chloride are produced?(1 point)
four
two
one
three
Answers
Answer: 2
Explanation: I DID DA TEST
A synthesis reaction is a chemical reaction in which two different atoms interact together to produce a different molecule or compound.
Sodium is an alkali metal with the atomic number 11. It has a +1 valence electron in its outermost shell.
Chlorine is a halogen family element with the atomic element 17. It requires an electron to complete its octet structure.
That is why the bonding reaction between them is called Electrovalent or Ionic bonding.
When 2 moles of Sodium (Na) combines with 1 mole of Chlorine (Cl), we have:
[tex]\mathbf{2 Na_{(s)} + Cl_2_{(g)} \ \to \ 2NaCl_{(s)} }[/tex]
Therefore, from the above reaction, we can conclude that there are two molecules of sodium produced when two atoms of sodium (Na) combine with one molecule of chlorine gas (Cl2).
Learn more about synthesis reaction here:
https://brainly.com/question/16987748?referrer=searchResults
How many elements are in “C2H6O”
Answers
Answer:
Ethanol's chemical formula is C2H6O. This chemical formula can also be written as CH3CH2OH or C2H5OH. It is made of nine atoms that include two carbon (C) atoms, six hydrogen (H) atoms, and one oxygen (O) atom.
Explanation:
Answer:
three elements. carbon hydrogen and oxygen
Which of the following is an
example of a homogeneous
mixture?
A. fruit punch
B. a sandwich
C. a toolbox
Answers
Answer:
fruit punch
Explanation:
............
The respiration rate of a goldfish is measured. The goldfish is then placed in cold water and the respiration rate is measured again
Answers
Answer:
so the answer are Tyre and he'll to do
Methane gas that comes out of a bunsen burner contains what type of energy?
A. Light energy
B. Heat/thermal energy
C. Chemical potential energy
D. Electrical energy
Answers
Need help please
Which of the following physical changes shows a change in a substance’s state of matter?
A. A piece of paper being torn in half
B. Clay being molded into a bowl
C. An ice cube being crushed
D. Liquid water becoming steam
Answers
Answer:
c
Explanation:
because when you crush an ice it would break into peace's and the ice would not be a solid
Why is nucleus of an atom charged is negatively charged?
Answers
Answer:
Charge is caused by a flow of electrons, since electrons are around the nucleus they can be lost or gained by atoms. When an atom gets charged, it gains a charge, that is, it gains an electron. Since electrons are negatively charged, when an atom gains one, it also becomes negatively charged.
Special structures in the cells of plants capture sunlight energy to power photosynthesis. What materials must plants obtain from their environment to perform photosynthesis?
sunlight, carbon dioxide, and simple sugars
sunlight, water, and carbon dioxide
sunlight, oxygen, and carbon dioxide
sunlight, water, and oxygen
Answers
Answer:
Sunlight
Water
And carbon dioxide
Additional information :
6CO2 + 6H2O → C6H12O6 + 6O2
