After learning about the law of conservation of mass, Remy began to wonder about how to best test this law. She wanted to show that the amounts of matter did not change but produced an equal amount of a different kind of matter. What is the best way to study this law?

A. in a homogeneous mixture
B. in a heterogeneous mixture
C. in an open system
D. in a closed system

Can someone’s verify? A player hits a base ball

A high concentration of hydrogen ions (H+) means a solution is what? (example: HCl aka Hydrochloric Acid)

A) very basic

B) neutral

C) neither acidic or basic

D) very acidic

Luisa likes to drink water from a plastic bottle. She knows the bottles were formed from synthetic polymers that were created in a chemical reaction. She also knows that synthetic materials can cause problems. Which statement explains the kind of problem that can develop from using synthetic materials such as plastic?

A. Plastics have changed the way people use materials.
B. Plastics have made the lives of people easier.
C. Plastics have contributed to more pollution.
D. Plastics have made more work for people.

25 points! brainliest for correct answer!
what are TWO characteristics of a neutron?
A. found outside the nucleus
B. negative electric charge
C. no electric charge
D. found in the nucleus

What might happen if there is excessive water removal from the Central Valley Aquifer in California?(1 point) Responses
A. It can cause severe weather changes in California.
B. It can cause severe weather changes in California.
C. It can transform California completely to a desert.
D. It can transform California completely to a desert.

2Fe + 6HC,H;02 - 2Fe(C2H302)3 + 3H2

How many different elements are in the chemical equation?

Why do waves spread out? A. because they meet another wave B. because they pass through water C. because they hit a big obstacle D. because they pass through a small opening

What is the relationship between reflection and diffraction? A. Reflection happens when a wave hits a hard surface, while diffraction only happens when a wave goes through air or water. B. Reflection happens when a wave hits a hard surface, while diffraction happens when two waves interact with each other. C. Reflection happens when a wave bounces back against an obstacle, while diffraction happens when a wave goes through an obstacle. D. Reflection happens when a wave bounces back against an obstacle, while diffraction happens when a wave bends around an obstacle.

Derrick decided to research what factors might affect the properties of the solubility of a solution. After completing his research, Derrick knew that several factors affected the properties of solubility. Explain the factors that affect the properties of the solubility of a solution.

please don't troll and be quick This is only for people who want brainlist and a lot of points
1.Record your observations. Include a data table with the names of the volcanoes, their distance from Kilauea, and their ages.

these are separate answers by the way
good luck

2. Make a graph that shows the distance between the volcanoes and Kilauea versus the ages of the volcanoes. You may plot your data on the template provided or use a spreadsheet program to make a graph.

How can the rate of a reaction be decreased?
Responses

A: having more surface area

B: lowering the amount of reactants

C: adding a catalyst

D: raising the temperature

This is only for people who want brainlist and a lot of points and i give the brainlist
1.Record your observations. Include a data table with the names of the volcanoes, their distance from Kilauea, and their ages.

these are separate answers by the way
good luck

2. Make a graph that shows the distance between the volcanoes and Kilauea versus the ages of the volcanoes. You may plot your data on the template provided or use a spreadsheet program to make a graph.

Read the selection from the section "Refraction." Another behavior is called refraction. Sometimes, a wave moves from one medium to another, like from water to air. It changes direction. This is refraction. Fill in the blank. A "medium" is ____.