Answer:
A = 74 g
Explanation:
Given data:
Ma-74 (74.333 - 85%)
Ma-75 (74.999 - 10%)
Ma-76 (75.700 - 5%)
Atomic mass close to = ?
Solution:
1st of all we will calculate the average atomic mass.
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) + (abundance of 3rd isotope × its atomic mass) / 100
Average atomic mass = (85×74.333)+(10×74.999)+(5×75.700) /100
Average atomic mass = 6318.305 +749.99+ 378.5 / 100
Average atomic mass= 7446.795/ 100
Average atomic mass = 74.467 amu
The average atomic mass is closer to the 74 g.
ASAP MULTIPLE CHOICE WILL MARK BRAINLIEST
What was Ernest Rutherford's contribution to our understanding of atomic structure?
He discovered the electron.
He discovered the existence of a center to the atom.
He discovered the neutron.
He discovered the mass of the electron.
Answer:
Ernest Rutherford discovered the existence of a center of the atom.
Explanation:
Answer:
He discovered the existence of a centre to the atom
Explanation:
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Which of the following values are not equal to 1 mole?
12.0 g of Carbon
12.0 g of Carbon
16.0 g of Oxygen
16.0 g of Oxygen
1.0 g of Hydrogen
1.0 g of Hydrogen
20.0 g of Nitrogen
Answer:
none of them are equal to one mole
Can you find two ways that carbon can get from the ocean to the lithosphere? (The lithosphere is the rigid layer of the Earth, including the crust and part of the mantle.
2) The two solid blocks represented in the diagram are made of the same material and are under the same temperature and pressure conditions. If the mass of block X is 54 grams, what is the mass of block Y?
Answer:
54 g
Explanation:
We'll begin by calculating the density of X. This can be obtained as follow:
Mass of X = 54 g
Length (L) = 9 cm
Breadth (B) = 2 cm
Height (H) = 1 cm
Volume of X = L × B × H
Volume of X = 9 × 2 × 1
Volume of X = 18 cm³
Density of X =?
Density = mass /volume
Density of X = 54/18
Density of X = 3 g/cm³
Finally, we shall determine the mass of Y as follow:
Length (L) = 3 cm
Breadth (B) = 3 cm
Height (H) = 2 cm
Volume of Y = L × B × H
Volume of Y = 3 × 3 × 2
Volume of Y = 18 cm³
Density of Y = Density of X (since they are made of the same material)
Density of X = 3 g/cm³
Density of Y = Density of X = 3 g/cm³
Mass of Y =.?
Density = mass /volume
3 = mass of Y /18
Cross multiply
Mass of Y = 3 × 18
Mass of Y = 54 g
Answer: 54
Multiply your answer
Which is the best way to determine if an object is made of pure gold?
Answer:
Acid?
Explanation:
NEED HELP FAST!!! Suppose someone gave you a picture of an electron dot diagram. What would be included in your interpretation of the diagram?
PLEASE HELP!!!!!!
Bonding is demonstrated using electron dot diagrams by representing the valence electrons that form bonds.
What do you mean by Bonding?
Atoms in molecules are joined by a chemical bond. Electrostatic forces between negatively charged electrons and positively charged atomic nuclei give rise to bonds.
An electron dot diagram is a representation of the arrangement of valence electrons around an atomic symbol.
The outermost shell contains valence electrons, which are electrons. By representing the valence electrons, which are the ones responsible for bonding, in electron dot diagrams bonding is demonstrated.
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is C2S6 ionic or covalent
Answer:
Ionic
Explanation:
I heard this somewhere
the endomembrane system and the ribosome work together is called what function
Answer:
During protein synthesis, ribosomes assemble amino acids into proteins. Before we discuss the endomembrane system, it's essential to have an understanding of ribosomes. Ribosomes are the cellular structures responsible for protein synthesis
i think this might help
Explanation:
10.How do you make sure there is no cross contamination of your samples of
substances?
Sound waves travel faster through liquid water than through air because
A.
water is hotter than air.
B. water is less dense than air.
c. the particles of the liquid transfer energy better than the particles in a gas.
D. the particles in the liquid vibrate more than the particles in a gas.
HURRY PLEASE HELP HELPPP
Answer:
Sound travels faster in water compared with air because water particles are packed in more densely. Thus, the energy the sound waves carry is transported faster
Explanation:
What are some different ways large or small distance can be measured?
Answer:
The method used for measuring the small distance is by using the scales and the distance measured over long distance is by inch tape or measuring tape.
Explanation:
Radar, the parallax method, and the triangulation method are used to calculate very long distances. Small distances are measured in centimeters and millimeters.
What are different ways of large or small measurement?Length is measured in distance. For instance, the length of a road equals its distance. The most popular units of measurement for distance in the metric system are millimeters, centimeters, meters, and kilometers.
The various ways that length, distance, or range can be measured are referred to as length, distance, or range measurement (ranging).
The rulers, transit-time methods, and interferometer methods based on the speed of light are the methods that are most frequently used.
Calipers and micrometers are used for making small, accurate measurements.
Therefore, different ways large or small distance can be measured.
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What sort of reaction would feel warm to the person holdi
What is the color and wavelength of light with 2.88 x 10-19 J of energy?
Answer : The color and wavelength of light is red and [tex]6.9\times 10^{-7}m[/tex] respectively.
Explanation :
Given:
Energy = [tex]2.88\times 10^{-18}J[/tex]
Now we have to determine the wavelength of light.
Formula used:
[tex]E=\frac{hc}{\lambda}[/tex]
where,
E = energy
h = Planck's constant = [tex]6.626\times 10^{-34}J.s[/tex]
c = speed of light = [tex]3\times 10^8m/s[/tex]
[tex]\lambda[/tex] = wavelength of light
Now putting all the given values in this formula, we get:
[tex]2.88\times 10^{-18}J=\frac{(6.626\times 10^{-34}J.s)\times (3\times 10^8m/s)}{\lambda}[/tex]
[tex]\lambda=6.9\times 10^{-7}m[/tex]
From the electromagnetic spectrum we conclude that the color of the light will be red of wavelength [tex]6.9\times 10^{-7}m[/tex].
Therefore, the color and wavelength of light is red and [tex]6.9\times 10^{-7}m[/tex] respectively.
what is an emission spectra
Electrons don't go around the nucleus in nice
little round circular paths, but are found in
regions called
Answer:
Orbitals
Explanation:
An orbital is a region in space where there is a high probability of finding an electron. An orbital is a probability function put forward by the wave mechanical model of the atom.
The wave mechanical model derives its principles from the Heisenberg uncertainty principle and the principle of wave particle duality.
Since we can not describe the momentum or position of the electron at any time with certainty, an orbital is a probability function that describes the region in space where the electron may be found around the nucleus.
The amount of material
in an object is called
Answer:volume
Explanation:
What do you think is the most important element and why? Include information
on its position on the Periodic Table in your response,
80 word count
Answer:
Hydrogen
Explanation:
It is considered a special element due to its flexibility in giving up & taking in electrons, therefore making it good for organic & inorganic chemistry. Hydrogen has only one proton and one electron and is the only element which has no neutrons. it is considered as the simplest element in the universe and gives a valid reason for it to be the most abundant and common element in the universe.
Hoped this helped! If this doesn't fit your 80 word count, you could shorten it.
what do you have to do before you preform your experiment?
a. the experiment
b. analyze data
c. form hypothesis
Answer:
form hypothesis
Explanation:
What do you think or know about atoms?
Answer:
atoms I personally think and somewhat know that they are what mostly makes up everything and everyone but an interesting fact scientists say atoms can not touch
J.J. Thomson discovered what part of the atom using a cathode ray tube (CRT?
please help me pleaseeee
Answer:
B.
Explanation:
Answer:
B.
email her superviser so that he can respond to the sender's question.
sam is trying to mix up some chemicals all the chemicals are in a flask and all he needs to do is shake them up prior to shaking the flask the chemicals weighed 300g how much will it weigh when he is done shaking the flash
It should still weigh 300g.
Explanation:
If I'm right, the Law of Conservation of Mass simply means the weight of whatever goes in will be the same when it comes out.
what are the properties of covalent compound
If a sample of 400g of ammonium chlorate is taken, how many grams of chlorine can be
extracted from the sample?
Second Question:
- When decomposed, a sample of mercury (I) carbonate yields 40 g of carbon. What is the
mass of mercury (I) carbonate, given that all carbon from the sample was extracted
without losing any mass of carbon?
PLEASE SOMEONE HELP ASAP IM BEGGING I NEED THIS TURNED IN BY 10:30!!
Answer: 120g
Explanation: 400g x 30% Cl = 120g
A sample of aluminum metal has a mass of
8.4 g. The volume of the sample is 3.1 cm3. Calculate
the density of aluminum.
Answer:
8.4/3.1 =2.709
Explanation: density is mass divided by volume
The density of aluminum will be 2.71 g/cm^3 solve for 8.4g v=3.1 cm3, 8.4g/3.1 cm3, and 8.4g/d=2.71 g/cm3.
Composition of aluminum?Natural environments do not contain pure aluminum. Beginning with bauxite ore, which is made up of hydrated aluminum oxide (40% to 60%) combined with silica and iron oxide, the manufacturing of primary aluminum metal can begin. For every 4 to 5 of bauxite ore, 2 tone of alumina are produced.
Is aluminum a type of metal?Aluminum (Al), often known as aluminum, is a chemical element that belongs to the periodic table's major Group 13 (IIIa, also known as the boron group). It is a light, silvery white metal. The most prevalent metallic element in the crust of the Earth is aluminum, which is also the most frequently utilized nonferrous meta
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5. What must occur for a change to be a chemical reaction?
Answer:
A chemical reaction happens when two substances combine into a new one through chemical synthesis or chemical decomposition for two or more.
Explanation:
A physical property of matter that does not depend on the amount of matter present is called a(n) ___ property.
A) chemical
B) normal
C) intensive
Answer:
chemical
Explanation:
Answer:
A: Chemical
Explanation:
I hope this helps
1. the ball has no energy
2. it has both potential and kinetic energy
3. all of the ball's energy is kinetic
4. all of the ball's energy is potential
Answer:
2
Explanation:
It is going through the air and is moving so that means that it has kinetic energy. But it is also going to go the down, which gives it potential energy.
Why is it more convenient to wear light-colored clothing than dark-colored clothing during
hot days?
Answer:
because dark colors attract heat so if your clothes are light you won't be as hot as if you were wearing dark colors.
Answer:
bc dark colored clothing attracts heat
is mixing sugar and coffee chemical or physical