Chemistry Middle School

Which of the following reactions best illustrates the Law of Conservation of Matter?
A.) H2O2H2O + O2
B.) Na + CuS Na2S + 2Cu
C.) K + AgCl KCl + Ag
D.) NaOH + 2HCl NaCl + H2O

Answers

Answer 1

Answer:

answer A..) H2O2HO+O2

Answer 2
I’m thinking it’s A

Related Questions

Help asap plz! Actual answers plz!

Describe an example of an action and reaction. Identify the forces and their directions.

Answers

Answer:

An example of action is there is a fire and reaction is you running

Explanation:

A example of an action is that she left in a hurry and a reaction iron and oxygen combining to make rust

Which of the following statements is true?

a. An insulator speeds up the transfer of heat.
b. Radiation is the transfer of heat in solids.
c. All moving objects experience friction.
d. All work gains some energy as heat.

Answers

Answer:

C is correct

Explanation:

For example, you move your hands together you are creating friction.

A student used a portable electric drill to remove screws from a broken wooden table. He noticed that the screws holding the table together were warm to the touch after being removed from the wood. Which statement best explains this phenomenon?
A:Electrical energy from the drill was converted into chemical energy due to conductivity.
B:The process of removing the screw concentrated the thermal energy that was already present in the wood

Answers

Answer:

A.

Electricity can travel through metal, such as the screws, creating a conductor.

I think it’s a
Step by step

Choose all the answers that apply.

The sun _____.

a. creates energy from fission reactions
b. creates energy through fusion reactions
c. transfers heat through radiation
d. is made of hydrogen and helium
e. uses its own mass to create energy

Answers

B:Creates energy through fusion reactions
b it creates energy through fusion reactions and d

What is the largest contributor to the greenhouse effect?

Answers

Answer:

burning of fossil fuels

Explanation:

If all three metals were exposed to extremely high temperatures, which would be the last to melt? (copper, gold, mercury)

Answers

Answer:

mercury

Explanation:

From these three metals, mercury would melt the fastest. Its kinda like water, it changes states quickly unlike gold and copper

Which biome has the greatest biodiversity, and why?
MY TEACHER ASKED ME THIS AND WE HAVEN'T EVEN LEARNED ABT THIS!!! PLS HELP I WON'T ACCEPT FAKE ANSWERS I WILL FLAG THEM AS FAKE :

Answers

rainforest as I contains, caves, caverns, semi-tropical, subtropical, and temperate areas.
rainforest have the greatest biodiversity because they are abundant in nutrients and energy.

WILL GIVE BRAINLIEST! What greenhouse gas most controls the temperature? And when is it released?

Answers

Answer:

1: carbon dioxide

2: As hydrocarbon fuels (i.e. wood, coal, natural gas, petrol and oil) are burnt, carbon dioxide is released. During combustion or burning, fossil fuel carbon mixes with oxygen in the air to create carbon dioxide and water vapor.

Explanation: hope it helps

jenny turned on the fan in her bedroom. what energy transformation took place when she turned on the fan

Answers

The energy transformation that took place is Kinetic Energy

Answer:

Kinetic energy

Explanation:

Kinetic energy is energy when something is in motion

Other Questions
I NEED HELP NOW !!!!!!! In order for each sheep to get enough grass to eat, there should be 7 sheep for each acre of land. Which farm has the correct ratio of sheep to acres? Select the best answer from the choices provided. A. The Twelve Oaks farm has 14 sheep and 2 acres of land. B. The Tara farm has 28 sheep and 3 acres of land. C. The Butler farm has 35 sheep and 6 acres of land. D. The Scarlett farm has 21 sheep and 2 acres of land. 10 POINTS In science, all ideas are not tested with evidence from the natural world.Question 4 options: True False Why does Paine describe the solders who "shrink from the service of (their) country as the summer solder and sunshine patriot? A) because Paine is interested in praising them for their positive virtues. B) because Paine believes that America will only be free if it maintains its optimism C) because they are "fair weather friends who abandon their cause at the first sign of trouble D) because Paine thought that the revolution should occur during the summer months, rather than the winter Eliminate In the book Anne Frank, who is the first person to allow Mr. Dussel to work on their teeth? Study the organ systems in the diagram below.remaThe organ system that filters and removes waste from the human body A city has a vacant lot in the shape of an isosceles trapezoid and the city workers are installing a fence around the lot. What length of fencing is required? Round the answer to the nearest meter. 25 m B x 25 m 45 The length of fencing required is meters. what is the answer? Before you can solve a problem, the first thing you have to do is Question 2 options: define the problem build a prototype design your solution test your solution Can someone answer these questions plz and I dont need the answers I need how to solve them. Thank you! 1. An ecosystem is best defined as a community of living things interacting with the_________.-A indoor-B nonliving-C invasive-D domesticated A wedge would be best described asA wheel and axle used to cTeate a rotary motionA lever arm fixed to a shaftA triangle shaped tool that functions as an inclined planeA rectangular shaped tool that functions as a pulley HURRY PLEASE!!! 10 MINUTES!!!!!!!!!!Many golfers wear wrist bracelets containing magnets because they claim the magnets improve balance and the length of shots played off the tee. A golfer would like to determine if the claim has merit and proposes two methods for collecting data. Method 1: As golfers approach the first tee, give some golfers wrist bracelets with magnets and some golfers wrist bracelets without magnets. During the round of golf, keep track of the length of the golfers shots. Method 2: Contact golfers who have purchased wrist bracelets with magnets and ask them to provide information about their shot length. Which statement about these methods is true? Method 1 is an observational study because it does not attempt to influence responses. Method 2 is an observational study because it does not attempt to influence responses. Method 2 is an observational study because it could include golfers from many golf courses. Both methods are observational studies because they both collect information about shot length. 4. How did the pH of the water affect the hatching of the brine shrimp?I 2. How does the first paragraph help develop the plot of the story? A. It illustrates how rude Della is B. It illustrates how independent Della is C. It illustrates how expensive it is to live in London D. It illustrates how concerned with money Della is Why was Federalism important to the founding father? how does the puritan setting help the theme in scarlett letter Which geographic factor is most responsible for the settlement pattern shown on the map? 1. Which organized religion agreed to recognize the Nazi party in 1933?OA. The Catholic ChurchOB. The Anglican ChurchOc.The Protestant ChurchOD. The Lutheran Church A law is declared unconstitutional if it _____ the Constitution. Dr. Franklin theorized that nutrition and body chemistry have a significant impact on severity of depression. Which perspective would support Dr. Franklin's ideas? Behavioral Biological Humanistic Psychoanalytic Sociocultural