Answer:
than, (less than or exactly one mole
HELPPP ASAPPP
A bar of gold occupies a volume of 17.0cm3 and has a mass of 34.5g. What is the density of that bar of gold?
A. 2.1 ml/g
B. 2.0 g/cm3
C. 0.49 g/cm3
D. 0.51 ml/g
Answer:
The answer is option BExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass of gold bar = 34.5 g
volume = 17 mL
We have
[tex]density = \frac{34.5}{17} \\ = 2.02941176...[/tex]
We have the final answer as
2.0 g/cm³Hope this helps you
Tell whether it is an example of an element or a compound. Write the word element if the sample shows characteristics of an element and compound if it shows Characteristic of compound
________11. Aluminum
_________12. Mercury
________13. Ferrous Sulfate
_________14. Sucrose
__________15. Carbon
Answer:
Element- Aluminum
Element - Mercury
Compound - Ferrous Sulfate
Compound - Sucrose
Element - Carbon
Explanation:
Element: an element is a pure substance which is composed of only one type of atoms and that cannot be split or broken down into any simpler pure substance.
Examples of elements include:
Aluminum - it is composed of only atoms of aluminium. Each atom has 13 protons
Mercury - it is composed of only atoms of mercury. Each atom has 80 protons
Carbon - it is composed of only atoms of carbon. Each atom has 6 protons
Compound: a compound is a pure substance that is composed of two or more types of atoms (elements) in a fixed and definite proportion and that cannot be split into component elements by simple physical methods but only by chemical methods. Examples of compound include:
Ferrous sulphate: It is composed of atoms of Iron, Sulfur and Oxygen
Sucrose: It is composed of atoms of Carbon, Hydrogen and Oxygen.
What type of chemical reaction is the following:
Ag2O ➜Ag + O2
Answer:
Decomposition reaction
Explanation:
2Ag₂O => 4Ag + O₂
As silver oxide is split into silver metal and oxygen gas, it can be classified as decomposition reaction.
How could you prepare 250 mL of 0.20 M NaCl using only a solution of 1.0 M NaCl and water?
Answer:
As a result, to prepare 250 ml of 0.20M NaCl, take 50 ml of 1.0M NaCl solution and add 200 ml of water.
Explanation:
60 points! please help me i would greatly appreciate it!
Answer:
[tex]\huge\boxed{\sf 186.59\ L}[/tex]
Explanation:
Given that:
No. of moles = 8.33 mol
At STP, 1 mol. of all gases has a molar value of 22.4 dm³/mol
So,
Volume of 8.33 mol of N₂ gas:
= no. of moles x molar value
= 8.33 x 22.4
= 186.59 dm³
Since 1 dm³ = 1 L
So,
Volume = 186.59 L
[tex]\rule[225]{225}{2}[/tex]
You are going into the Upper Peninsula wilderness for a whole year
to bring an unlimited supply of one item. What will you bring? Why?
Answer:
water
Explanation:
you can go longer without food than you can with water.
What is the volume of 19.87 mol of ammonium chloride (NH4CI) at STP?
Explanation:
[tex]19.87mol \times \frac{22.4lit}{1mol} = 445.088 lit[/tex]
The color of coral depends on ______.
increased diversity of coral polyp species
ocean water pollution
coastal land development silt run
off damage from scuba diving, boating, and fishing
Answer:
Hello I didi this quiz and i got 100% and the answer is (a) hope this helps <3
Explanation:
Can someone please help me name all these?
Write the common and IUPAC names of the following:
pasagot nga po please need lang po talaga.
BARINLY PLS HELP ME ASP !!! it’s science I need help fast pls
Answer:
Its D. All of the above
What do the elements within a "period" have in common?
The number of atomic orbitals is the same for all elements in a period. Every element in the top row (the first period), for example, has only one orbital for its electrons. The electrons of all the elements in the second row (second period) have two orbitals. Every row adds an orbital as you progress down the table.
I hope this helps <3
Consider marking Brainliest.
Some power plants burn coal to produce electricity the energy released from the cold being burned is used to change water into steam steam spinach turbines of large generators that produce electricity which energy transformations occur when coal is used to produce electricity
Answer:
When coal is used to produce electricity , the heat energy is transformed into mechanical energy .
Explanation:
Coal is one of the United States' most affordable and largest domestically produced energy sources. It is used to generate a significant quantity of our electricity, about 37%. Historically, producing power from coal has been correlated with a wide range of environmental impacts.
Water is converted into steam at a coal-fired steam plant, much like a nuclear plant, which in turn powers turbine generators to generate electricity. Here is how it operates in the process.
Heat is produced -: It is pulverized to the fineness of talcum powder until the coal is burnt. It is then combined with hot air and blown into the boiler's firebox. The coal / air mixture provides the most full combustion and optimum heat necessary for suspension burning.Water transforms to vapor -: The heat turns highly purified water, pumped through pipes inside the boiler, into steam. The steam is piped to the turbine, reaching temperatures of up to 1,000 degrees Fahrenheit and pressures of up to 3,500 pounds per square inch. The Engine Transforms Steam -: The turbine shaft is rotated by the immense stress of the steam pressing against a pair of giant blades. The turbine shaft is attached to the generator shaft, where magnets spin to generate electricity within wire coils.Steam switches back to water -: The steam is drawn into a large chamber in the basement of the power plant after doing its job in the turbine. Millions of gallons of cool water from a nearby source (such as a river or lake) are pumped through a network of tubes that pass through the condenser in this significant stage. In the tubes, the cool water turns the steam back into water that can be used in the plant over and over again.Without any pollution, the cooling water is returned to its source and the steam water is returned to the boiler to repeat the cycle.
Hence, the heat energy is transformed to the mechanical energy ,when coal is used to produce electricity.
what is chemical formula of colemanite?
Answer:
Ca2B6O11·5H2O
Explanation:
colemanite, borate mineral, hydrated calcium borate (Ca2B6O11·5H2O) that was the principal source of borax until the 1930s.
How does this change the gravitational force between the two objects?
Answer:
The gravitational pull of the moon is probably changing how our atmosphere is.
Explanation:
which vestigial structure do whales have? what is the function of this
Answer:
The pelvic bones of whales are one of the classic examples of a vestigial structure. In most animals, the pelvic bones are needed to be able to move the lower or rear set of limbs for the purpose of locomotion.
In the expression 3CO2, the numbers 3 is known as _______
Answer:
The number is known as 3 carbon molecules followed by 2 oxygen molecules. This is because on the periodic table, the letter C means carbon, and O2 means oxygen.
which of the following is the energy of motion
You wake up in the morning to the smell of bacon. Which evidence supports the conclusion that a chemical change is happening?You wake up in the morning to the smell of bacon. Which evidence supports the conclusion that a chemical change is happening?
Answer: There is gas produced.
Explanation:
After waking up one morning the smell of bacon was noticed. This was made possible due to the gas produce from the chemical reaction taking place during the process of making the bacon.
This gases are produced from the cooking of the bacon ( meat ), on the fire using cooking oil and all other ingredients.
How do the numbers of metal and non metal elements compare with each other. What is the percentage
I am feeling helpful give me some questions with high points
Answer: who is post malone
Explanation:
Answer:
Select the letter of the correct answer.
A vertical skateboard ramp is 12.5 feet high. The staircase leading to the top of the ramp is 15 feet long. How far away from the bottom of the ramp is the bottom of the staircase? Round your answer to the nearest tenth of a foot.
Press enter to interact with the item, and press tab button or down arrow until reaching the Submit button once the item is selected
A8.3 feet
B8.4 feet
C8.0 feet
D8.2 feet
Explanation:
so can someone help me please i only have 15 mins left !!!!!
how do Newton's laws of motion describe when and how objects move?
How many grams of water are produced when 2.50 mol oxygen reacts with hydrogen?
H2 + O2 + H2O
O A. 22.5 g
OB. 90.0 g
OC. 3.6 g
OD. 45.0 g
Answer:
Thus, when 2.5 mol of oxygen reacted with hydrogen, 2 * 2.5 mol = 5 so its A
what's thermodynamics? explain in brief.
Answer:
study of the relations between heat, work, temperature, and energy
Explanation:
Thermodynamics is the study of the relations between heat, work, temperature, and energy. The laws of thermodynamics describe how the energy in a system changes and whether the system can perform useful work on its surroundings.
Which organ system coordinates the action of the body
Answer:
Brain
Explanation:
It's obviously the brain everyone knows that. Its not gonna be the heart or the lungs is it. The brain is most active at night while the body is sleeping xoxo. Also it links with how we see things and the nerve system but i aint got time to go into detail lots of love guvan
Brain is the organ system coordinates the action of the body.
What is organ system?Organ system is defined as a biological system made up of a collection of organs that collaborate to carry out one or more functions. The function of organ system are helps the body filter out dangerous metabolites, alcohol, narcotics, and other hazardous substances. Managing the amounts of several vital substances in the blood, such as amino acids. Creating bile acid. blood is sanitized by some microorganisms.
Brain is defined as a remarkable three-pound organ that regulates every bodily process, processes information from the outside world, and embodies the spirit and mind. The brain is arguably the most important organ in the human body. It regulates and coordinates every aspect of who we are as people, including our capacity for thought and feeling, as well as our capacity for memories and emotions.
Thus, brain is the organ system coordinates the action of the body.
To learn more about organ system, refer to the link below:
https://brainly.com/question/13278945
#SPJ6
Why are Punnett square used?
A. To visually help others Scientists understand physics
B. To help write a book on genetics
C. To determine the probability that an offspring would have a specific trait
D. To decode the human genome
Help please
Answer:
Your answer I believe will be C. To determine the probability that an offspring would have a specific trait.
the same
3. If the values for both mass and volume double,
the value for density will
What features of this model will help Armando answer the question?
Answer:
Explanation:
Answer to Armando is an artist who sells prints of his original paintings. ... This problem has been solved! ... Armando wants to create a function P(x). to model his total profit where x is the number of paintings sold
Why does the sky change colors at sunrise and sunset
Answer:
As the sun's angle changes, (because of the rotation of the earth) the sun slowly begins to shine more or less sunshine slowly. When sunsets and sunrises occur, the color of the sky changes because the sunshine is starting to fade out or in.
I put it in my own words so you don't have to worry about plagiarism :)
3. Along which series is the bond angle increasing?
A. NH3 H2O CH4
B. CH4 NH3 H2O
C. H2O NH3 CH4
D. H2O CH4 NH3
The series along which the bond angle is increasing is: C. H2O NH3 CH4.
What is bond angle?Bond angle refers to the geometric angle that actually exists between angles that are adjacent to each other. It is also known to be the angle that is formed by three contiguous atoms.
We can see that as we move from H2O to NH3 then to CH4, the bond angle increases.
Learn more about bond angle on https://brainly.com/question/25425872
help!
If both waves have the same sign (either positive or negative), then ___________ interference will occur when the two waves overlap.
A. Negative
B. Constructive
C. Positive
D. Destructive