Explain how thinking about chemicals at the atomic and molecular scale can help to explain observable phenomena, such as the changes you see when you etch copper.
Answers
Not a straight up answer, but moreover to help you get it: (Circuit Boards)
Aside from the tasks it performs, perhaps the most important function of a circuit board is providing a way to integrate the electronics for a device in a compact space. A PCB allows components to be correctly connected to a power source while being safely insulated. Also, circuit boards are less expensive than other options because they can be designed with digital design tools and manufactured in high volume using factory automation.
Partially straight up, helping you get the answer: (Copper Chloride)
Copper(II) chloride is the chemical compound with the chemical formula CuCl 2. This is a light brown solid, which slowly absorbs moisture to form a blue-green dihydrate.
Etching helps us to see the structure of the atoms of copper.
What is etching?The term etching refers to the process by which we expose the inner structure of copper. It is usually done electrically or by the use of an acid. The surface of the copper is removed and the inner structure of the copper is shown.
As such, when you etch copper, you can see the inner structure such as the arrangement of the atoms of copper and how they fit together.
As such looking through the etched copper would help you to appreciate that matter is composed of atoms.
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Related Questions
Which of the following is a metal?
A. nitrogen
B. calcium
C. sulfur
D. carbon
Answers
Answer: Calcium
Explanation: The chemical element Calcium (Ca), atomic number 20, is the fifth element and the third most abundant metal in the earth's crust. The metal is trimorphic, harder than sodium, but softer than aluminium.
Hope this helps. pls mark me brainliest :)
because it is in group 2 which makes it an alkaline earth metal and a powerful reducing agent that loves to react with nonmetals especially powerful oxidizing agents like fluorine and chlorine.
please helpppppppp.will give 12 points
Answers
I’m not super sure.
Answer:
Heat
Explanation:
When energy transfers, due to the difference in temperatures, the energy that is passed on from a surface to another surface is heat. Therefore, we get heat transfer. Heat transfers happen in 3 ways radiation, convection, and conduction.
Hoped this helped!
What was one was one important impact of Supreme Court's ruling in Bush v. Gore
Answers
Answer: the answer is b or c
Explanation:
I took it
During digestion, what happens in the stomach?
A. All food molecules are broken down into smaller molecules by chemical reactions.
B. Some types of food molecules are broken down into smaller molecules by chemical reactions.
C. Water in the food passes into the blood and travels to other organs where it is used.
D. Food passes into the blood and travels to other organs where it is used in various reactions.
Answers
Answer:
A
Explanation:
Food is digested in the stomach for several hours. During this time, a stomach enzyme called pepsin breaks down most of the protein in the food. The pancreas and gland cells of the small intestine secrete digestive enzymes that chemically break down complex food molecules into simpler ones.
Answer:
A
Explanation:
How to work out the relative mass of potassium? What is the calculation? ( explained very easily )
Answers
Answer:
39
Explanation:
Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.
———————————
(1/12)th Mass of one C12 atom
What is a difference between how ants and elephants primarily use grouping for survival?
A) Elephants use grouping for better chance of mating, and ants use grouping for better access to food.
B) Elephants use grouping for cooperation, and ants use grouping for protection of the young.
C) Ants use grouping for cooperation, and elephants use grouping for protection of the young.
D) Ants use grouping for better chance of mating, and elephants use grouping for better access to food
Answers
I believe the correct answer is A.
What kind of rocks would you expect to see on Mars? What evidence supports your response?
Answers
When the speed of the bottle is 2 m/s, the KE is kg m2/s2. When the speed of the bottle is 3 m/s, the KE is kg m2/s2. When the speed of the bottle is 4 m/s, the KE is kg m2/s2. When the speed of the bottle is 5 m/s, the KE is kg m2/s2. When the speed of the bottle is 6 m/s, the KE is kg m2/s2.
instructions
In this part of the experiment, you will be changing the speed of the bottle by dropping it from different heights. You will use the same mass, 0.250 kg, for each trial, so record this mass in Table B for each velocity. Then, calculate the expected kinetic energy (KE) at each velocity. Use the formula KE = mv2,
where m is the mass and v is the speed. Record your calculations in Table B of your Student Guide.
Answers
Answer:
Based on the given instructions, you need to calculate the expected kinetic energy (KE) at each velocity using the formula KE = mv^2, where m is the mass and v is the speed. The mass is given as 0.250 kg.
Table B: Calculation of Kinetic Energy (KE)
Table B: Calculation of Kinetic Energy (KE)
Speed (m/s)Mass (kg)KE (kg m^2/s^2)20.2500.50030.2500.75040.2501.00050.2501.25060.2501.500
To calculate the kinetic energy at each velocity, multiply the mass (0.250 kg) by the square of the velocity.
For example, when the speed of the bottle is 2 m/s: KE = (0.250 kg) * (2 m/s)^2 = 0.250 kg * 4 m^2/s^2 = 1.000 kg m^2/s^2
Perform similar calculations for the other velocities and record the results in Table B.
Answer:
Explanation:mass of the bottle in each case is M = 0.250 kg
now as per given speeds we can use the formula of kinetic energy to find it
1) when speed is 2 m/s
kinetic energy is given as
2) when speed is 3 m/s
kinetic energy is given as
3) when speed is 4 m/s
kinetic energy is given as
4) when speed is 5 m/s
kinetic energy is given as
5) when speed is 6 m/s
kinetic energy is given as
1. Using D10W and a vial of NaCl 4 mEq/mL, how many mL of NaCl are needed to prepare 250 mL of a
D10/NS solution?
a. 4.8mL
b. 9.6ml
c. 19.6mL
d. 154mL
Answers
To prepare 250 mL of a D10/NS solution using D10W and a vial of NaCl 4 mEq/mL, you would need 9.6 mL of NaCl. Normal saline (NS) contains 154 mEq/L of sodium chloride (NaCl). To prepare 250 mL of NS, you would need 250 mL * (154 mEq/L) = 38500 mEq of NaCl. Since the vial of NaCl contains 4 mEq/mL, you would need 38500 mEq / (4 mEq/mL) = 9625 mL = 9.6 mL of NaCl. So the correct answer is b. 9.6ml.
Need help with this question
Answers
Name and Title:
Include your name, instructor's name, date, and name of lab.
Objectives(s):
In your own words, what is the purpose of this lab?
Hypothesis:
In this section, please include the predictions you developed during your lab activity. These statements reflect your predicted outcomes for the experiment.
Procedure:
The materials and procedures are listed in your virtual lab. You do not need to repeat them here. However, you should note if you experienced any errors or other factors that might affect your outcome. Using your summary questions at the end of your virtual lab activity, please clearly define the dependent and independent variables of the experiment.
Data:
Record the elements present in each unknown astronomical object. Be sure to indicate “yes” or “no” for each element.
Hydrogen Helium Lithium Sodium Carbon Nitrogen
Moon One
Moon Two
Planet One
Planet Two
Conclusion:
Your conclusion will include a summary of the lab results and an interpretation of the results. Please answer all questions in complete sentences using your own words.
Using two to three sentences, summarize what you investigated and observed in this lab.
Astronomers use a wide variety of technology to explore space and the electromagnetic spectrum; why do you believe it is essential to use many types of equipment when studying space?
If carbon was the most common element found in the moons and planets, what element is missing that would make them similar to Earth? Explain why. (Hint: Think about the carbon cycle.)
We know that the electromagnetic spectrum uses wavelengths and frequencies to determine a lot about outer space. How does it help us find out the make-up of stars?
Why might it be useful to determine the elements that a planet or moon is made up of?
Answers
PLEASE HELP ASAP!!!! WILL GIVE BRANILEST
Fill a 100-milliliter container with 50 grams of sand. Fill a 100-milliliter container with 50 grams of cold tap water. Fill the last 100-milliliter container with 100 grams of cold tap water. Use the scale to measure the masses.
a scale measuring 100 grams of cold water in a 100-milliliter container, with 100-milliliter containers holding 50 grams of sand and 50 grams of cold water alongside
Pour all the ice cubes into a tub, and fill it with cool tap water to a depth of 2 inches. Place the sand and water samples in the ice water. Cover the entire tub.
three 100-milliliter containers in an ice bath inside a covered tub, with one container holding 50 grams of sand, one holding 50 grams of cold water, and one holding 100 grams of cold water
Every 15 minutes, remove the cover and check the temperatures of the samples using the three thermometers. Wait 30 seconds before recording the thermometer reading. Once the temperatures of the three samples are no more than a degree apart, record the temperatures.
three 100-milliliter containers (each with a thermometer) in an ice bath inside an uncovered basin, with one container holding 50 grams of sand, one holding 50 grams of cold water, and one holding 100 grams of cold water
Answers
Answer:Every 15 minutes, remove the cover and check the temperatures of the samples using the three thermometers. Wait 30 seconds before recording the thermometer reading. Once the temperatures of the three samples are no more than a degree apart, record the temperatures.
hope this helps
Answer: Person above me is sped
Explanation:
What percentage of plant and animal species on Earth are found in tropical rainforests?
10%
20%
30%
more than 50%
Answers
The correct answer is more than 50% .
Why more than 50%?
Rainforests are Earth’s oldest living ecosystem s, with some surviving in their present form for at least 70 million years. They are incredibly diverse and complex, home to more than half of the world’s plant and animal species even though they cover just 6% of Earth’s surfacelearn more about tropical rainforests below,
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15 points and brainiest (if there's 2 answers)
Is the coloring of the peppered moths an example of competition, differential reproductive success, or inherited variation?
Please explain why
thank you
Answers
Explanation:
Because the coloring of the moths were a genetic mutation that helped strengthen the endurance and versatility of the moths by blending in with better environments
In a reaction of yeast and hydrogen peroxide, the yeast causes a reaction in which the hydrogen peroxide breaks apart to form oxygen gas and water. Heat is released (given off) in this experiment, which would indicate a(n) ____________________ reaction.
A) equilibrium
B) endothermic
C) physical reaction
D) exothermic
Answers
Answer:
D, exothermic reaction
Answer: it indicates exothermic reaction
Explanation:
help me on this question please need answer today.
How do you think plants would grow in space? Which tropism(s) would be affected and why?
Answers
Answer: Mainly gravitropism because of the lack of gravity. The other two tropisms depend on the circumstance that it is in.
Explanation:
Answer: Plants use other environmental factors, such as light, to orient and guide growth
Explanation: In the absence of gravity, plants use other environmental factors, such as light, to orient and guide growth. A bank of light-emitting diodes (LEDs) above the plants produces a spectrum of light suited for the plants' growth.
Which of the following statements fully describes what an object may do when it experiences unbalanced forces? Select the two best answers.
A. It may change directions.
B. It will move at a constant speed.
C. It may slow down.
D. It may slow down or speed up.
E. It will stay stationary.
Answers
Answer:b
Explanation:
Please Help! What conclusions can you draw about how the amount of potential energy stored in system changes as a ball is placed at varying heights on a ramp? Write an evidence-based claim.
Answers
Answer:
The ball's potential energy in vertical circular motion depends upon the height of a ball concerning the referenced point at the bottom. Thus, the potential energy of the bowling ball moving in the vertical circular motion is maximum at the top concerning the bottom of the circular path.
Explanation:
How is power defined?
A. the quantity of work accomplished
B. the direction of the work
C. the total distance an object is moved
D. the rate at which work is accomplished
Answers
Answer:
power is the rate at which work is accomplished
What could you change or add to your models based on what you have learned about molecules and phases so far?
Answers
Answer:Phase changes require either the addition of heat energy (melting, evaporation, and sublimation) or subtraction of heat energy (condensation and freezing). ... Changing the amount of heat energy usually causes a temperature change.
Explanation:
Answer: The answer is Phase changes require either the addition of heat energy (melting, and evaporation) or subtraction of heat energy (condensation and coldness). Changing the amount of heat energy usually causes a temperature change.
Explanation:
For example it can be like 98 degrees today and it can be like 66 degrees the next day. It causes the weather to change. Weather changes so much because the Earth is constantly spinning. Lands and water bodies heat up differently that cause constant atmospheric change. Also note that "seasons" are not the same as weather. Seasons have to do with the angle of the solar radiation we receive caused by the tilt of the Earth on it's axis.
Which of the following is the conjugate base of HPO 2?
O A. H2P04
B. PO 3
C. H3PO4
O D. HAP04
Answers
Answer:
A. H2P04
Explanation:
539.28kJ x (1mol/ 6kJ) x (28g / mol N2) x (1mL/11g) x (1L/1000mL) = ?
Please only answer if you know it! I already this posted this question a few times to have it commented on by scam users so I will now be emailing the brainly moderators to ban any inapplicable answers or self promotions. This question is super important to me as its the final piece of my project due tomorrow.
Answers
Answer:
if what you need is the final answer
the final answer is = 0.228 and I think the unit is Liter(L).
Explanation:
Is this statement true or false?
The word planet comes from the Greek word planetai, which means wanderer because the ancient Greeks thought of the planets as wandering through the stars.
True
False
btw this is a science question
Answers
I’m at k12 student
Answer: True
Explanation:
Asteres planetoid, or 'wandering stars,' was the term used by Greek astronomers to describe star-like objects that appeared to move across the sky.
The term has been applied to a wide range of objects, including the moon, satellites, the sun, and asteroids.
A planet, according to the International Astronomical Union (IAU), is a body that orbits the Sun, is massive enough for its own gravity to keep it around, and has 'cleared its neighborhood' of smaller objects approaching its orbit.
Science homework
Pls help me!!!!!!!!!!!!!!!
Answers
Answer:
first one
Explanation:
Particle of solids are very close as the particle can not move they have exact volume,shape
Answer:
First one
Explanation:
since the particles of a solid are packed together.
Who was settling in Minnesota after the Civil War and why?
Answers
Calculate the volume (in cm3
) of 54 g
of water at 1 ∘C
.
Express the volume in cubic centimeters to two significant figures.
Answers
Energy is inversely proportional to the wavelength of a wave. Which of these waves would have the greatest energy?
Answers
Answer: 2
Explanation:
Why are most plants that grow in the tundra small with thin, wax-covered leaves?
The plants need to be able to grow in sandy soil.
The plants need to be able to grow in sandy soil.
The plants need to survive the hot temperatures in the summer.
The plants need to survive the hot temperatures in the summer.
The plants need to survive the year-round dry conditions.
The plants need to survive the year-round dry conditions.
The plants need to be able to grow in the moist, humid air.
Answers
Answer:
The answer is (The plant needs to be able to grow in sandy soil, survive in hot temperatures, and year round conditions.)
Explanation:
If you have any questions please ask me! :)
How did this piece of evidence change your thinking about the channel on Mars? Explain your ideas below.
Answers
The piece of evidence changed thinking about the channel on Mars because it shows that the rock was formed next to flowing water as such rock formations exist on Earth and were formed by flowing water.
Was there flowing water on Mars ?The geologic process that could have created the channel on Mars is water moving. We can infer from the image that water running across the terrain on Mars created channels similar to those on Earth.
We can claim that the flowing of water creates the channels on Mars because when the water runs for a long period from the same region, it takes the sediments and creates channels.
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How does an atom change if all of its electrons are removed?
p.s. I'll mark the first answer the brainliest if it is correct! ;)
a. The atom’s volume increases.
b. The atom’s mass increases.
c. The atom becomes positively charged.
d. The atom becomes negatively charged.
Answers
c. The atom becomes positively charged
if the electrons are removed it means theres no longer a negative charge to balance the positive charge of the protons in the atom