Answer:
Explanation:
In 1896 Henri Becquerel was using naturally fluorescent minerals to study the properties of x-rays, which had been discovered in 1895 by Wilhelm Roentgen.
X-rays are neutral and cannot be bent in a magnetic field. The new radiation was bent by the magnetic field so that the radiation must be charged and different than x-rays.
The conversion factor 1 mol/6.02 × 1023 representative particles can be used to find the number of moles when the number of representative particles is known
true or false
n element has FOUR known isotopes with the following atomic masses and percentage of occurrence: 47.688 amu; 15.778% 44.000 amu; 39.687% 43.557 amu; 24.500% 42.609 amu; 20.035% What is the average atomic mass of this element? Group of answer choices
Which of these statements describes this mathematical equation?
P1v1/t1=k
The final pressure of a gas is directly proportional to volume and temperature change.
The final pressure of a gas is directly proportional to volume change and Inversely proportional to temperature che
The final pressure of a gas is inversely proportional to the volume change and directly proportional to temperature
none of the above
Answer:
The final pressure of a gas is inversely proportional to the volume change and directly proportional to temperature
Explanation:
Given
[tex]\frac{P_1V_1}{T_1} = k[/tex]
Required
Interpret
[tex]\frac{P_1V_1}{T_1} = k[/tex]
Multiply both sides by T1
[tex]T_1 * \frac{P_1V_1}{T_1} = k * T_1[/tex]
[tex]P_1V_1 = kT_1[/tex]
Divide both sides by V1
[tex]\frac{P_1V_1}{V_1} = \frac{kT_1}{V_1}[/tex]
[tex]P_1 = \frac{kT_1}{V_1}[/tex]
This can be rewritten as:
[tex]P_1 = k\frac{T_1}{V_1}[/tex]
In the above expression; k is a constant of proportionality.
So, the equation can be written as variation as follows:
[tex]P_1\ \alpha\ \ \frac{T_1}{V_1}[/tex]
To interpret:
P varies directly to T (the numerator) and inversely to V (the denominator).
Why are a molecule's atoms as far away from each other as they can get?
A. Forces between electron pairs push the atoms apart.
B. Induced dipoles push the atoms away from each other.
C. Electronegativity differences force the atoms apart.
D. The protons in the nuclei push the atoms apart.
Answer: A
Explanation:
Because I just answered it and it’s right. ( Forces between electron pairs push the atoms apart.
What are all synthetic materials made from?
Answer:
Natural resources
Explanation:
One of the scientists interviewed for the article said, "Almost certainly this
effect has already ended." If he is correct, what evidence would you expect to
see to support his statement?
Answer:
The scientist is referring to the unusually slow growth rate of carbon dioxide occurring recently. As that slow growth rate ends, the rate of increase of carbon dioxide in the atmosphere should go up soon.
Explanation:This is the exact answer so switch it up.
can you slap me 360°
Answer:
yes and no, it is possible, but im here and you and be any where in the world.
Explanation:
hope it helps
Answer: Yes, it’s possible if you don’t cry like a baby banana and say ouch !!
Explanation:
What makes a submarine dive?
pumping air into its tanks to increase its density
pumping air into its tanks to decrease its density
adding water to its tanks to increase its density
Answer:
The answer to your question is C. Adding water to its tanks to increase its density.
Explanation:
Have a wonderful day! Sorry if I am wrong but I believe this is correct. Good luck! Plz follow me! Bye!
you can estimate the degree to which bond between two atoms is ionic or cavelent by calculating the?
Answer:
difference in the atoms' electronegativites
Explanation:
hope this helps <333
Which statement is true of a
simple machine?
A. Simple machines are used to create friction.
B. Simple machines have many moving parts.
C. Simple machines are very basic and make
work easier.
D. Simple machines are always electrical.
Copyright © 2003 - 2020 Acellus Corporation. All Rights Reserved
simple machines
A machine is a physical system that use power to exert forces, regulate movement, and carry out an activity. Simple machines are very basic and make work easier. This statement is true about simple machine. Therefore, option C is correct.
What is machine ?A machine is a physical system that use power to exert forces, regulate movement, and carry out an activity. The phrase is frequently used to describe both natural biological macromolecules, such as molecular machines, and man-made devices, such as those using engines or motors.
Any tool that simplifies work by adjusting a force is a machine. Every time a force pushes an item over a distance, work is done. Work = Force x Distance is an equation that measures the amount of work that is completed. You exert force on a machine when you operate it.
Simple machines are often used to lift big items with a pulley, to ride a bicycle, or to cut with a pair of scissors. It should be noted that a machine cannot be both a force multiplier and a speed multiplier.
Thus, option C is correct.
To learn more about the machine, follow the link;
https://brainly.com/question/3135614
#SPJ2
Which of the following is an element?
A
MgBr
B
HCl
C
O
D
Cu(SO4)3
Oxygen is a chemical element with symbol O and atomic number 8. Classified as a nonmetal, Oxygen is a gas at room temperature.
How many total valence electrons are available for the Lewis Dot structure of H2S?
Answer:
8 Valence Electrons
Explanation:
There are 2 atoms of Hydrogen and 1 atom of Sulfur in the compound. Each Hydrogen atom has 1 electron (which is the valence electron).Sulfur has six valence electrons. Therefore, there is a total of eight valence electrons in H2S.NEED HELP ASAP
Identify the type of reation. 2 NO2 ----> 202 + N2
A)
Synthesis
B)
Decomposition
C)
Single Replacement
D)
Double Replacement
Answer:
B) Decomposition
Explanation:
Decomposition reaction:
It is the reaction in which one reactant is break down into two or more product.
AB → A + B
Chemical equation:
2NO₂ → 2O₂ + N₂
The given reaction is decomposition reaction. NO₂ decomposed to give nitrogen and oxygen. All other options are incorrect because,
Synthesis reaction:
It is the reaction in which two or more simple substance react to give one or more complex product.
Single replacement:
It is the reaction in which one elements replace the other element in compound.
AB + C → AC + B
Double replacement:
It is the reaction in which two compound exchange their ions and form new compounds.
AB + CD → AC +BD
What did Asoka do for convicted murderers?
Answer: He provided a 3 time period where there families appeal to there conviction.
The density of ethanol is 0.789 g/mL. Find the mass of a sample of ethanol that has a volume of 150.0 mL
Answer:
The mole is a key unit in chemistry. The molar mass of a substance, in grams, is numerically equal to one atom’s or molecule’s mass in atomic mass units.
Explanation:
I, m right?
SEP Use Models Why does the number of electrons in each principal energy shell increase as the number of the shell increases?
Answer:
See explanation
Explanation:
The number of electrons in each principal energy shell increases as the number of shells increases because more electronic orbitals become available to accommodate the electrons.
For instance, the n= 2 level only accommodates eight electrons in the s and p orbitals whereas the n=3 level accommodates 18 electrons in s, p and d orbitals respectively.
Each principal level accommodates 2n^2 electrons where n= the principal energy shell.
The increase in the number of shell leads to increase in the number of electrons.
The number of electrons in each principal energy shell increase as the number of the shell increases because each cell can accommodate 8 electrons except the first shell which has only 2 electrons. The number of electrons increases when we go down the group due to addition of new shells.
The atom added new shells in the atom if the existing shells fill with electrons and no place is available for the remaining electrons so we can conclude that the increase in the number of shell leads to increase in the number of electrons.
Learn more: https://brainly.com/question/19756408
Ammonification is the formation of
If an atom has a mass number of 52 and has 28 neutrons, what is the atomic number?
Answer:
24
Explanation:
52-28=24
Question 8 of 10 Which wave property is related to the pitch of a sound? A. Crest height B. Frequency O C. Amplitude D. Rest position
Answer:
frequency
Explanation:
i took the test
Can someone help me
Answer:
the moon and sun
Explanation:
Answer:
3rd option
Explanation:
True of False: The "North" end of a Magnet will be repelled by another "North" end of a magnet
Answer:
True
Explanation:
Opposite attract when talking about magnets
Answer:
True.
Explanation:
Opposites attract. The two same forces of the north ends repel each other.
how are pigments and dyes different in terms of their chemical components?
Answer:
Pigments themselves are actual particles of color. ... In terms of their chemical composition, one primary distinction between dyes and pigments is that pigments are insoluble in water as well as most other solvents. In general, dyes are either water soluble or soluble in another type of solvent.
Explanation:
How could you improve the accuracy of your measurements?
Explanation:
Accuracy is the nearness of observed values or measured values to the true value.
The difference between the measured and observed value gives the error incurred during the experimental procedure.
Here are some ways to improve the accuracy of measurements;
Use the right instrument to make recordings and to take measurements. Employ the right hands and improve your technical knowledge. Be very careful and observant while making measurement. Ensure the instruments are properly calibrated. Make sure the experiment follows the right design.To make a 7.21M solution, how many moles of solute will be needed if 12.0 liters of solution is required? (Stoichiometry)
Answer:
I think it's 78. I might be wrong I'm not sure.
Explanation:
ANSWER FOR BRAINLYEST
Can someone please help me with this? This is due today, please please help me!
ATOMIC NUMBER: It is the number of protons present in the nucleus of every atom
MASS NUMBER: It is the number of nucleon. Nucleon are the number of proton and neutrons present in the nucleus.
PROTON NUMBER: Proton number equal to the atomic number.
ELECTRON NUMBER: Electron Number is equal to the atomic number.
NEUTRON NUMBER: It is Mass Number - Atomic Number.
CHARGE: It is due to the addition or removal of the electron. + charge when electron removed and - charge when electron is added.
SYMBOL: It is represented as,
[tex]X^Z_A[/tex]
Z is Mass Number
A is Atomic Number
_____________________________________Worksheet:(I) ATOMIC NUMBER: 17
MASS NUMBER: 35.5
PROTON NUMBER: 17
ELECTRON NUMBER: 17
NEUTRON NUMBER: 18.5
CHARGE: 0
_____________________________________(II) ATOMIC NUMBER: 71
MASS NUMBER: 180
PROTON NUMBER: 71
ELECTRON NUMBER: 71
NEUTRON NUMBER: 109
CHARGE: 0
_____________________________________(III) ATOMIC NUMBER: 40
MASS NUMBER: 86
PROTON NUMBER: 40
ELECTRON NUMBER: 38
NEUTRON NUMBER: 46
CHARGE: +2
_____________________________________(IV) ATOMIC NUMBER: 92
MASS NUMBER: 238
PROTON NUMBER: 92
ELECTRON NUMBER: 86
NEUTRON NUMBER: 146
CHARGE: +6
_____________________________________(V) ATOMIC NUMBER: 82
MASS NUMBER: 206
PROTON NUMBER: 82
ELECTRON NUMBER: 78
NEUTRON NUMBER: 124
CHARGE: +4
_____________________________________(VI) ATOMIC NUMBER: 34
MASS NUMBER: 79
PROTON NUMBER: 34
ELECTRON NUMBER: 36
NEUTRON NUMBER: 45
CHARGE: -2
_____________________________________(VII) ATOMIC NUMBER: 48
MASS NUMBER: 113
PROTON NUMBER: 48
ELECTRON NUMBER: 49
NEUTRON NUMBER: 65
CHARGE: -1
_____________________________________(VIII) ATOMIC NUMBER: 21
MASS NUMBER: 42
PROTON NUMBER: 21
ELECTRON NUMBER: 21
NEUTRON NUMBER: 21
CHARGE: 0
_____________________________________(IX) ATOMIC NUMBER:
MASS NUMBER:
PROTON NUMBER:
ELECTRON NUMBER:
NEUTRON NUMBER:
CHARGE:
_____________________________________(X) ATOMIC NUMBER: 83
MASS NUMBER: 209
PROTON NUMBER: 83
ELECTRON NUMBER: 80
NEUTRON NUMBER: 126
CHARGE: +3
_____________________________________(XI) ATOMIC NUMBER: 47
MASS NUMBER: 108
PROTON NUMBER: 47
ELECTRON NUMBER: 47
NEUTRON NUMBER: 61
CHARGE: 0
_____________________________________(XII) ATOMIC NUMBER: 49
MASS NUMBER: 116
PROTON NUMBER: 49
ELECTRON NUMBER: 46
NEUTRON NUMBER: 67
CHARGE: +3
_____________________________________(XIII) ATOMIC NUMBER: 53
MASS NUMBER: 128
PROTON NUMBER: 53
ELECTRON NUMBER: 54
NEUTRON NUMBER: 75
CHARGE: -1
_____________________________________(XIV) ATOMIC NUMBER: 76
MASS NUMBER: 188
PROTON NUMBER: 76
ELECTRON NUMBER: 72
NEUTRON NUMBER: 112
CHARGE: +4
_____________________________________Best Regards,'Borz'+30 points
Answer right away!!
I will add a brainiest answer
Describe what happens to the air in a cold front
Be descriptive
Answer:
where a cold air mass is replacing a warmer air mass. ... The air behind a cold front is noticeably colder and drier than the air ahead of it. When a cold front passes through, temperatures can drop more than 15 degrees within the first hour.
Explanation:
The effects from a cold front can last from hours to days. The air behind the front is cooler than the air it is replacing and the warm air is forced to rise, so it cools. As the cooler air cannot hold as much moisture as warm air, clouds form and rain occurs.
does sound have color? why do you have this opinion (base your answer on wavelengths)
Answer:
Yep. Many of the sounds we associate with white noise are actually pink noise, or brown, or green, or blue. In audio engineering, there's a whole rainbow of noise colors, each with its own unique properties, that are used to produce music, help relaxation, and describe natural rhythms like the human heartbeat.
Explanation:
How many moles are in 12 grams of NH3?
Answer:
molecular weight of NH3 or grams This compound is also known as Ammonia. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles NH3, or 17.03052 grams.
No. of moles present in 12 grams of NH₃ are 0.705 moles.
What is Avogadro’s number?
Avogadro's number is the number of units in one mole of any substance and equals to 6.02214076 × 10²³. The units can be electrons, atoms, ions, or molecules.
No. of moles is defined as a particular no. of particles that we can calculate with the help of Avogadro’s number.
Given,
Mass of NH₃ = 12g
one mole of any substance = 6.02214076 × 10²³
Molar mass NH₃ = 17g
17g NH₃ has = 1 mole
1g NH₃ has = (1÷17) moles
12g NH₃ has = 0.058 × 12 moles = 0.705 moles
Therefore, No. of moles present in 12 grams of NH₃ are 0.705 moles.
Learn more about mole concept, here:
https://brainly.com/question/22540912
#SPJ2
How can convection in the mantle affect the positions of Earth's continents?
Answer:
Scientists believe that convection circulation within the mantle helps continents to move. As heat from Earth's innermost layer—the core—transfers to the bottom layer of mantle rock, the rock warms, softens, and rises upward. ... This churning motion in the mantle appears to be a major factor in plate movement.
Explanation:
