Chemistry Middle School

What is density?


1. a measure of salinity


2. the weight of water


3. the amount per unit volume of a particular material


4. the amount of salt in water

Answers

Answer 1
Answer: 3, the amount per unit volume of a particular material
Answer 2
3 is the correct answer

Related Questions

Which of the following pH values represents a strong acid?

1
8
13
7

Answers

Answer:

1

Explanation:

acid is 0-3 lower numbers

1














1 is the ph of a strong acid learned this last year glad I could help.

A tool might be made of an alloy because the alloy _____.


A. occurs naturally

B. resists rust

C. can bend easily

D. is softer

Answers

I assume the answer is: A
~Hello Wonderful Person~

Your answer is:

B. Resists rust.

A tool might be made of an alloy because the alloy resists rust.

Why?

Iron is a great building material but steel (an alloy made by adding small amounts of non-metallic carbon to iron) is stronger, harder, and rustproof. Aluminum is a very light metal but it's also very soft in its pure form.

Alloy steels have a wide range of special properties, such as hardness, toughness, corrosion resistance, magnetizability, and ductility. Nonferrous alloys, mainly copper–nickel, bronze, and aluminum alloys, are much used in the coinage.

____________________________________________________________

Hope this helps!

⊕If this answer does not answer your question or displeases you, tell me in the comments and I will try to find the right answer and replace it ASAP. Thank you.⊕

Have a good day.

HEELLPP PLEASE IM BEGGING ILL GIVE BRAINLIEST

Vegetable soup is an example of _____________:


A. an element
B. a compound
C. a mixture
D. a chemical reaction

Answers

Answer:

C

Explanation:

You mix different thing together to make a new thing.

(Subject is actually 8th Grade Science But The don't have that... i'm sorry.)

Question:

If you have two objects with different masses about to fall from the same height. Which one will have the greatest potential energy?


Group of answer choices:

A.) Smallest

B.) Largest

C.) Roundest

D.) Flattest

Answers

Answer:

I am Going to say the smallest im in 8th grade and i got that right

Explanation:

The smallest will have the greatest potential energy

explain why the sun appers to be the brightest star in the sky. relate your explanation with an example such as street lights. this is science

Answers

Answer:

The sun is a star but It is the brightest in the sky because it is the closest star to earth.

I don't know how to compare it to street lights though...

Explanation:

The most useful property of metalloids is their _____.

A. stored energy which is released through combustion

B. being non-reactive with other elements

C. value when used to make precious jewelry

D. varying ability to conduct electricity

Answers

Answer:

DDDDDDDDDDDDDDDDDD

Explanation:

i just answer this it's corect trust meee

What is one advantage of developing energy-efficient technologies?

Answers

Answer:

it's simple

Explanation:

For residential buildings, a whole-house approach using a cost-effectiveness criterion can result in savings of 50 percent or more in heating and cooling and 30–40 percent reductions in total energy use.

I hope you understand have a great day :3

One advantage of developing energy-efficient technologies, would be less waisted money on electricity.

Which group of elements has the highest boiling point? * IIIa (13) IIa (2) Ia (1) IVa (14) Transition metals

Answers

Answer:

the elements that have the highest boiling is transition metals

I REALLY NEED HELP ITS DUE AT 11:59 PM

Answers

Answer:

I attached a photo of balanced equations but thats as much as I can help.

Explanation:

well all I know is that reactants are like ingredients to make a product so I would say that h2+O2 are the reactants and the arrow is directing that it makes h20 which is your product

Watch the video below. After the video use the text box to answer the following questions:

1. What is the difference between and autotroph and a heterotroph?

2. What is one example of an autotroph. One example of a heterotroph.

Please help the video isn't necessary for these questions :)

Answers

autotrophs are producers and they prepare their own food. heterotrophs are consumers that depend on other sources for their food.

autotroph ex. plants, algae, some types of bacteria

heterotroph ex. dogs, birds, all humans
^ , i argee with them .

How many moles of Hg are in a thermometer that contains 0.055 mL of Hg?

Answers

Answer:

745.8

Explanation:

Answer:

745.8

Explanation:

I hope this helps, and correct I mostly guaranteed is correct.

DOES ANYONE ELS FIN SNUFFLEUPAGUS CREEPY CAUSE I DO.....

Answers

Answer:

BROO.... YESSS

Explanation:

Answer:

Yes

Explanation:

They just creep me out

Which of these can be combined to make a mixture?

a. solid and a liquid
b. two solids
c. two liquids

Answers

Two liquids is the correct answer

Answer:

c

Explanation:

you cant mix a rock and a rock together and expect to get a mixture

and you cant mix a rock and water and expect them to mix

so its on logical that it is two liquids

Which metals are so reactive that they are never found as uncombined elements in nature?

A. alkaline earth metals

B. alkali metals

C. rare earth metals

D. transition metals

Answers

B

This element is rare and it reacts very quickly to other elements

Which of the following is a problem caused by acid rain?

respiratory problems in humans
is a factor in global warming
makes lakes and streams unsuitable aquatic life

Answers

Answer:

Air pollution like sulfur dioxide and nitrogen oxides can cause respiratory diseases, or can make these diseases worse. Respiratory diseases like asthma or chronic bronchitis make it hard for people to breathe.

Answer:

1st one

Explanation:

mark brainliest please

HELP ME PLEASE
T-T thanks

Answers

Answer: You Would have to .

Explanation:

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