Answer:
100 grams
Explanation:
4. One of Dr. Birdley's boxes has a volume
of 240 cm^3 and a density of 15 g/cm^3.
The mass of the box is
a) 225 g
b) 265 g
c)3600 g
d) 32 g
Density = Mass/Volume but it can also be rearranged to:
Mass = Volume x Density
Given in the question:
Volume - 240 cm3
Density - 15 g/cm3
Calculation
Mass = Volume x Density
= 240 x 15
= 3600g
Therefore, the mass of the box is 3600g so the answer is C.
what element is not classified as a metal, nonmetal, or metalloid?
Answer:
Boron and/or Polonium
Explanation:
In the periodic table, you can see a stair-stepped line starting at Boron (B), atomic number 5, and going all the way down to Polonium (Po), atomic number 84. Except for Germanium (Ge) and Antimony (Sb), all the elements to the left of that line can be classified as metals.
BARINLY PLS HELP ME ASP !!! it’s science I need help fast pls
Answer:
Its D. All of the above
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.
A compound has a molecular mass of approximately 295 g. It contains 40.68% Carbon, 5.12% Hydrogen, and 54.20% Oxygen. Calculate the empirical and molecular formula.
which of the following is the energy of motion
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.
Question 6 Not complete Points out of 2.0 Not flaggedFlag question Question text Separation can be achieved when a reaction occurs in a mixture. The resulting mixture will have one chemical species in a solution and the other chemical species as a solid. The mixture is centrifuged and the supernate is decanted into a separate test tube. Now the solid and solution are separated from each other. What reagent could you add to a mixture of Ag and Cu 2 to separate the two species
A reagent that could be added to a mixture of [tex]Ag^+[/tex] and [tex]Cu^{2+}[/tex] to separate this two species is hydrochloric acid (HCl).
What is a separation technique?A separation technique can be defined as a technique that is used to separate (convert) two or more mixture and solution of chemical substances into distinct products such as solutes, chemical compounds or elements.
In this scenario, a reagent that could be added to a mixture of [tex]Ag^+[/tex] and [tex]Cu^{2+}[/tex] to separate this two species is hydrochloric acid (HCl). As HCl is added to this mixture, a white precipitate would be formed by silver ions ([tex]Ag^+[/tex]) while the copper ion ([tex]Cu^{2+}[/tex]) would form a maroon precipitate.
In conclusion, the above confirmation test should be done when hydrochloric acid (HCl) is added to a mixture of [tex]Ag^+[/tex] and [tex]Cu^{2+}[/tex] as a reagent.
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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]
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 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.
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.
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 :)
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.
how do Newton's laws of motion describe when and how objects move?
Which is a diatomic molecule?
A) Ar
B) CO
C) CO2
D) NaCl
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.
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]
How do the numbers of metal and non metal elements compare with each other. What is the percentage
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.
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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.
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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 !!!!!
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.
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.
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
the same
3. If the values for both mass and volume double,
the value for density will
Arab cultures charted planets in the Dark Ages. Europeans helped establish the Sun-centered model of the solar system during the Renaissance. Russia and the U.S.A have discovered new features on planets using spacecraft in modern times.
This is an example of
A.
many cultures arguing about how the solar system works and all of their contributions being worthless.
B.
cultures wasting time by doing the same thing over and over throughout history.
C.
how contributions by many different cultures throughout history have advanced our understanding of the solar system.
D.
modern technology proving that earlier cultures could not contribute to our understanding of the solar system.
Since Russia and the U.S.A have discovered new features on planets using spacecraft in modern times, this is an example of: C. how contributions by many different cultures throughout history have advanced our understanding of the solar system.
What is a solar system?A solar system can be defined as a collection of the outer and inner astronomical or planetary bodies (planets) alongside the Moon that are in orbit around the Sun, in slightly elliptical orbits.
What is culture?Culture simply refers to the general way of life of people in a specific society or geographical area. This ultimately implies that, culture is a terminology which can be used to describe a sum total of the norms, beliefs, clothes, language, foods, and behaviors which a group of people that are living in a geographical area share in common.
In this context, we can reasonably infer and logically deduce that contributions by various cultures around the world have helped us to advance our understanding of the solar system.
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Which of the following is the name for two or more types of atoms that are chemically bonded together?
Compound
Colloid
Element
Solvent
Answer:
Compound
Explanation:
Compounds consists of atoms of two or more different elements that are chemically bonded together.
5. A gas at 2.0 atm and 25 C has an initial volume of 1.00 L. The pressure of the gas increases to 12.0 atm and the temperature is raised to 125 C. What is the new volume of the gas?
Answer:
V2 = 0.223 LExplanation:
T1 = 25C = 298.15 K
P1 = 2.0 atm
V1 = 1.00 L
T2 = 125C = 398.15 K
P2 = 12.0 atm
V2 = ?
P1V1/T1 = P2V2/T2 must be changed to T2P1V1/T1/P2
398.15 x 2.0 x 1.00 ÷ 298.15 ÷ 12.0 = V2
V2 = 0.223 LSo 0.223 L is the answer!!
Summarize your main take away about water and hydrogen bonding.
Answer:
As water is boiled, kinetic energy causes the hydrogen bonds to break completely and allows water molecules to escape into the air as gas (steam or water vapor). When water freezes, water molecules form a crystalline structure maintained by hydrogen bonding.
Explanation: