2a. Density is the relationship between mass and volume. Density has
many uses but is most commonly used to help determine the identity of
an unknown substance. Specifically for copper the proportion is
approximately 8.96 grams for every mL of copper. Approximately how
much volume (mL) would 29 grams of copper have? While it is helpful for
you to show all work, you MUST provide rationale for your thinking and
explanation for each of your steps.

The volume of copper : 3.24 ml

Density is a quantity derived from the mass and volume

Density is the ratio of mass per unit volume

With the same mass, the volume of objects that have a high density will be smaller than objects with a smaller type of mass

The unit of density can be expressed in g/cm³ or kg/m³

Density formula:

[tex]\large{\boxed {\bold {\rho~=~ \frac {m} {V}}}}[/tex]

ρ = density , g/cm³ or kg/m³

m = mass , g or kg

v = volume , cm³  or m³

A common example is the water density of 1 gr / cm³

The density of copper : 8.96 gr/ml

mass of copper : 29 g

then the volume :

[tex]\tt V=\dfrac{m}{\rho}\\\\V=\dfrac{29~g}{8.96~g/ml}\\\\V=\boxed{\bold{3.24~ml~or~3.24~cm^3}}[/tex]

The atmospheric pressure on a mountain is 550 mmHg and 1 atm is equal to 760mmHg. What is the pressure in atm? Give your answer to 2 significant figures atm

I will mark whoever gets it right most brainliest (25 point question)

What is the name of the ionic compound CaCN?

Hint: It's not Calcium Cyanamide

Why do more gas bubbles mean the gold is less pure

Measure of the energy
released during an
earthquake.

How would you calculate the gravitational potential energy of a 2 kg bottle of soda falling off of a kitchen table that is 0.76 m tall ?

Jack, an Investigator, wants to prove that a certain suspect was present at the crime scene when the crime was committed. What kind of
evidence should he look for?


Jack should look for __________ evidence because the analysis of such evidence can prove whether the person was present when the crime
was being committed. This evidence refers to tiny fragments of material that can be transferred from a human to a human or human to a
location
(forensic science question)

***20 pts***
If you had 3.02 grams of Sodium (Na), how many moles would that be?
ANSWER W STEPS IF NOT REPORTED​

Which pair of substances would most likely result in the production of a solid when reacting with a base?

how many significant figures in 1. 19.99 2. 140486 3. 0.0609 3. 5.08 ?

The process shown in the image above is known as
A. neutron absorption.
B. nuclear fusion.
C. a chain reaction.
D. a redox reaction.

How many grams are there in 1.18 X 1026 atoms of iridium?

Fill in the blank.the amount which an object accelerates depends on the mass of the object on the size of the ____ acting upon it
I need help I’m struggling

PLEASE ANSWER ASAP!
For her school Science ft Alyssa designs an experiment to learn more about
erosion. Her experimental set up is shown below
Using the illustration shown above, determine which of the following statements best
describes the independent variable itest variable). this experiment:



A The speed she pours the water, since it is the same for all trials.

B The amount of water she pours, because the amount she pours is the same.

C The height of the tray, because this is a change that may cause and effect on the experiment.


D The mass of sand that collects at the bottom of the tray, because this is what is being measured or observed.

which group contains most elements

Did you title your lab report?
 Did you state the purpose of the investigation?
 Did you include a brief overview of the investigation?
Materials and Procedure
 Did you make a list of materials? Did you include quantities and SI units?
 Did you present the steps of the procedure as a numbered list?
 Did you note any changes to the original procedure?

1.04 x 10^-3 pm to mm

[
An atom, which is an isotope of an element, is characterized by -
O having more electrons in its nucleus.
O having more neutrons in its nucleus.
having fewer protons in its nucleus.
having more protons in its nucleus.

how many atoms are in 4 Mg(OH)2 ?

PLEASE HELP ME FAST THANKYOU! :)
What is a substance said to be if it evaporates easily?


A.crystallized


B.condensing


C.changing pigmentation


D.volatile

Im literally failing some classes can some one help me with them

i give brainliest help pls

what is the scientific method?

A) the process of proving a theory
B) a way of analyzing data
C) a method of testing an idea
D) the steps required to form a hypothesis

Nakeem and his team were playing basketball in the gym, and all the basketballs were firm and bounced well. When the team went outside,
the same basketballs seemed a bit flat and would not bounce well. Which statement provides the best explanation for what happened to the
basketballs?
O A The temperature outside was colder than the temperature in the gym, so the pressure of the air in the balls increased.
B. The temperature outside was warmer than the temperature in the gym, so the pressure of the air in the balls increased.
OC. The temperature outside was colder than the temperature in the gym, so the pressure of the air in the balls decreased.
OD. The temperature outside was warmer than the temperature in the gym, so the pressure of the air in the balls decreased.

If 0.243 g of magnesium is reacted with hydrochloric acid, the amount of acid required would be:

In the compound nickel(II) sulfide, there is always 58.7 g of nickel for every 32.1 g of sulfur. What is the simplified ratio of
nickel to sulfur?

Describe the motion of molecules in each of the three states of matter.

Fe(s) + O2(g) Fe3O2 (s)​

1. How many protons?
2. What is the atomic number?
3. What element is this?
4. How many neutrons?
5. What is the mass number?
6. What is the isotope?​

Based on your knowledge of chemical equations, what do you know for sure
about this equation?


Pls help I need it I’m dumb but I do need it! *here a pic*

Count the atoms of each element.
5(NH) P
5
10
15
20
30
40
50
60
70
Nitrogen
o
o
O
O
O
O
o
Hydrogen
O
O
O
O
Phosphorus
O
O
O
O
O