Which of the following is not a savanna?a. Cerrado
b. Pampas
C. Llanos
d. Serengeti
Answers
Answer:
Answer is B Pampas
Explanation:
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A student is asked to draw an atom of sulfur on a board. the pictures below represents what the student drew. what is wrong with this sulfur atom plzzzz help i need to finish up
Answers
Answer:
Calcium bromide
Explanation:
When naming compounds, the use of prefixes depend on the type of bond made. In this case, calcium and bromine form a ionic bond because calcium is a metal and bromine is a non-metal.
Ionic bonds are not named using prefixes. So no matter how many atoms there are, you will simply write the name of the element for the first element.
For the second element, you name it as well, but only use the root name and end it with -ide.
Answers
Answers
Answer:
848.1 g/mol
Explanation:
Data given:
Standard of atomic mass of Ca = 50 amu
molar mass of Aluminium Acetate = ?
Solution:
Relative atomic mass represented by Ar. It is ratio of actual mass with respect to the 1/12th mass of C-12 but here Ca-50 is standard.
Formula of Aluminium Acetate = Al(CH₃COO)₃
In order to calculate Ar
first we will calculate 1/50 of Ca
As we know
mass of 1/12 of C-12 = 1.993 x 10⁻²⁶/12 = 1.661 x 10⁻²⁷ Kg
So, for Ca-50
mass of 1/50 of Ca-50 = 1.993 x 10⁻²⁶/50 = 3.986 x 10⁻²⁸ Kg
Now
Relative Atomic mass for element X = rest mass of "X"/ 3.986 x 10⁻²⁸ Kg . . . . . . (1)
First we have to know the relative atomic masses of Aluminium, carbon, hydrogen, oxygen atoms involve in Aluminium Acetate formula with respect to new standard Ca-50
By using equation-1 we can calculate Ar for which we have reported rest masses of atoms as below
Rest mass of Aluminium = 4.48 x 10⁻²⁶ Kg
Rest mass of carbon = 1.993 x 10⁻²⁶ Kg
Rest mass of hydrogen = 1.608 x 10⁻²⁷ Kg
Rest mass of oxygen = 2.657x10⁻²⁶ Kg
Now put values in equation 1 for each atom
- Ar for Aluminium= 4.48 x 10⁻²⁶Kg / 3.986 x 10⁻²⁸ Kg
Ar for Aluminium = 112.5 amu
- Ar for Carbon= 1.993 x 10⁻²⁶ Kg / 3.986 x 10⁻²⁸ Kg
Ar for Carbon= 50 amu
- Ar for Hydrogen = 1.608 x 10⁻²⁷ Kg / 3.986 x 10⁻²⁸ Kg
Ar for hydrogen = 4 amu
- Ar for Oxygen = 2.657x10⁻²⁶ Kg / 3.986 x 10⁻²⁸ Kg
Ar for Oxygen = 66.6 amu
Now find the molar mass ofAl(CH₃COO)₃
molar mass of Aluminium Acetate = Al(CH₃COO)₃
Al(CH₃COO)₃ = 112.5 + 3 (50 + 3(4) + 50 + 66.6 +66.6)
Al(CH₃COO)₃ = 112.5 + 3 (50 + 12 + 50 + 66.6 +66.6)
Al(CH₃COO)₃ = 112.5 + 3 (245.2)
Al(CH₃COO)₃ = 112.5 + 735.6
Al(CH₃COO)₃ = 848.1 g/mol
molar mass of Aluminium Acetate = 848.1 g/mol
Answers
Non-ionizing Radiation
Visible light
Infrared light
Near ultraviolet light
Microwaves
Low frequency waves
Radio waves
Waves produced by mobile phones
A campfire's heat
Thermal radiation
Extremely low frequency waves (3 - 30 Hz)
Very low frequency waves (3-30 kHz)
Power lines
Strong magnets
MRI
LEDs
Lasers
Light bulbs
Light from the sun
Remote controls
Cordless phones
Radio-frequency radiation such as televisions, FM and AM radio
Shortwave and CB's
Computer screens
Infrared lamps use to maintain food temperature in restaurants
Ionizing Radiation
Ultraviolet light
X-rays
Gamma-rays
Radioactive decay's particles
Cosmic rays
Alpha rays
Beta rays
Medical imaging equipment
Ionization of food
Sterilization of medical tools
Nuclear power production
Metal mining can result in exposure to ionizing radiation
Coal mining and power production from coal
Nuclear weapons
Galactic Cosmic Radiation (to which astronauts are exposed)
Solar Particle Event radiation (to which astronauts may be exposed)
Natural background radiation
Radiation therapy for specific forms of cancer
Radon
CT scans
Nuclear medical scans
X-Rays
Airport security scanners (in extremely high usage)
ultraviolet light from the sun.
heat from a stove burner.
light from a candle.
x-rays from an x-ray machine.
alpha particles emitted from the radioactive decay of uranium.
Answers
To convince someone means to persuade them to believe or do something. This involves gaining their trust and making them feel confident in your argument or proposal.
On the other hand, to suspect someone means to have doubts or distrust about their motives or actions. This involves questioning their credibility and being cautious about their intentions.
So, while convincing involves building trust and confidence, suspecting involves the opposite - doubting and being cautious.
Copper has a higher activity than hydrogen and cannot replace it.
Copper has a lower activity than hydrogen and cannot replace it.
The reaction cannot occur because water is a reactant.
answer is Copper has a lower activity than hydrogen and cannot replace it.
Answers
Answer: Option (c) is the correct answer.
Explanation:
It is known that a stronger element is able to displace a less stronger element in a chemical reaction.
And, according to the reactivity chart hydrogen is more reactive in nature than copper.
Therefore, when Cu is added to then there will be no reaction because copper is less reactive than hydrogen.
Thus, we can conclude that the reaction not proceed to a product because copper has a lower activity than hydrogen and cannot replace it.