Answers
Answer:
you need to calculate it by percentage
Answer:
mass = 20g
volume = 80ml =0.08 dm³
[tex]p = \frac{mass}{volume} [/tex]
[tex]p = \frac{20g}{0.08 \:dm ^{3} } \\ p = 250gdm {}^{ - 3} [/tex]
Related Questions
2(NaHCO3) how many atoms of hydrogen
Answers
Answer:
2 hydrogen atoms
2 Na atoms
2 carbon atoms
6 oxygen atoms
Answer:
11
Explanation:
3. DNA replication occurs:
a. During cell division
b. Continuously
C. Before cell division
d. Only once in the life of the organism
e. Only in gametes
Answers
Answer:
b
Explanation:
Fill in the blank. The amount which an object accelerates
depends on the mass of the object and on the size of the
acting upon it.
gravity
velocity
inertia
force
Answers
Answer: the answer is force
Explanation:
Which is the best way to determine if an object is made of pure silver
Answers
Answer:
The Nitric Acid Test
Explanation:
The Nitric Acid Test is used to check if silver is pure or plated. To do so, file a small part of the item in a discreet area where it cannot be seen. Apply a few drops of nitric acid. If the area turns into creamy white, the silver is pure or sterling. If green, it is probably fake or silver-plated.
write a 3 sentence summary about DNA.
I’ll mark you as the brainiest answer !!
Answers
Answer:
DNA is a complex, long-chained molecule. DNA contains the genetic blueprint for building and maintaining all living organisms. Found in nearly all cells, DNA carries the instructions needed to create proteins, specific molecules essential to the development and functioning of the body.
If a molecule of CH4 diffuses a distance of 0.530 m from a point source, calculate the distance (meters) that a molecule of N2 would diffuse under the same conditions for the same period of time (1 second).
Answers
Explanation:
Assume the gases each diffuse in one second, in order to create a rate.
Set rate1 = N2 = x
Set rate2 = CH4 = 0.530 m/sThe molecular weight of N2 = 28.0
The molecular weight of CH4 = 16.0
Graham's Law is:
r1 over r2 = √MM2 over √MM1
Substituting, we have:
x / 0.530 = √(16.0 / 28.0)x = 0.400 m/s
A container of carbon dioxide has a volume of 240 mL at a temperature of 22°C. If the pressure remains constant, what is the volume at 44°C?
Answers
Answer:
Volume of the [tex]CO_{2}[/tex] gas at 44°C is 258 ml.
Explanation
here,
using Charles' law ,
[tex]\frac{V}{T} =\frac{v}{t}[/tex]
where , V= initial volume v= final volume
T=initial temperature t = final temperature
Given - pressure is constant ,
so , putting the values -
V= 240ml
T= 22 + 273K = 295K (since converting celsius into kelvin that
is +273K )
v =?
t = 44+ 273K = 317K
Now , putting the given values in charles' law ,
[tex]\frac{240ml}{295K} =\frac{v}{317K}[/tex]
240ml x317K = v x 295K (through cross multiplication )
v =[tex]\frac{240ml\times317K}{295K}[/tex]
= 258ml .
thus , the volume of carbon dioxide in a container at 44°C IS 258ml .
Which two factors can affect a solid solute's solubility
A. Whether the particles of the solute and solvent are charged
B. Pressure acting and solute
C. Length of time spent stirring
D. Temperatures of the solvent and solute
Answers
Answer:
A and D
Explanation:
It might seem like B and D but I took the test and it's A and D.
Answer:
Whether the particles of the solute and solvent are charged
Temperatures of the solvent and solute
Explanation:
A. Whether the particles of the solute and solvent are charged
B. Pressure acting and solute
C. Length of time spent stirring
D. Temperatures of the solvent and solute
Which option is an example of a physical property?
A. conductivity
B. pH
C. reactivity
D. rusting ability
Answers
physical property is conductivity
Identify the wave with the greatest
frequency
Answers
Answer: Gamma Waves
Explanation:
Gamma waves have the highest frequency , shortest wavelength and therefore, carry the greatest amount of energy.
3 AgNO3 + K3PO4 - Ag3PO4 + 3 KNO3
What is the reaction
Answers
Answer:
its a Double Displacement (Metathesis) reaction
the balanced equation is 3AgNO3 + K3PO4 → Ag3PO4 + 3KNO3
Explanation:
What is the charge on an electron?
Answers
Answer
1.60217662 × 10-19 coulombs
Explanation:
.
pls help it’s due at 12
Answers
Answer:
it's
D. 2K + 2H2O
Explanation:
it just is
4. Calculate:the mass of the light bulb is the sum of the values on each rider. To get magnified view of the 1-gram rider,place the cursor over that rider (each tick mark represents 0.1 g.)
100-g rider:___________
10-g rider:___________
1-g ruder:___________
Note because the position of the 1-g slider can be estimated to the nearest 0.01 g, the mass measurement is typically recorded to the nearest hundredth.for example, we would write 201.32 g or 146.70 g if the slider is exactly on a 0.1-g tick mark.
5. Practice:use the gizmo to find the mass of the other objects.write their masses below.
Paper clips:__________
Cone:_________
Cube:__________
Answers
Answer:
Look in the picture
Explanation:
You run from your house to the grocery store in 1.0 minute, and the store is 300 meters from your house. What is your average speed in meters per second for the trip?
Answers
Answer: 3
Explanation:
it is difficult to press the football in water why?
Answers
Answer:
The ball you want to submerge displaces the water occupied in the ball's volume. ... In water the concrete has a buoyancy pressure force equal to the displaced liquid's weight and weighs only 120 pounds until it reaches the surface.
Explanation:
Where are alkaline earth metals found on the periodic table?
O Group 1
O Group 2
O Groups 3-12
O Group 17
Answers
Answer:
group 2
Explanation:
because they are the only alkalines earth metals on the periodic table
Answer:
b
Explanation:
True or False - The central nervous system allows us to sense the environment.
Answers
Answer: no
Explanation: they tell the organs what to sense.
Typically, water runs through the baseboard copper tubing and, therefore, fresh hot water is constantly running through the piping. However, consider a pipe where water was allowed to sit in the pipe. The hot water cools as it sits in the pipe. What is the temprature change, (ΔT), of the water if 210.0 g of water sat in the copper pipe from part A, releasing 3178 J of energy to the pipe? The specific heat of water is 4.184 (J/g)⋅∘C.
Answers
Answer:
-3.617 °C
Explanation:
Step 1: Given data
Mass of water (m): 210.0 g
Energy released in the form of heat (Q): -3178 J (the minus sign corresponds to energy being released)
Specific heat of water (c): 4.184 J/g.°C
Temperature change (ΔT): ?
Step 2: Calculate the temperature change
We will use the following expression.
Q = c × m × ΔT
-3178 J = 4.184 J/g.°C × 210.0 g × ΔT
ΔT = -3.617 °C
if we are made of stardust, does that make you feel more or less important as an individual (or just the same), and why?
Answers
A pot of water is heated on a gas-flame stove and begins to boil. Which two
transfers of thermal energy involved in this system are examples of radiation?
A. From the burner to a nearby spoon
B. In the surrounding air as air currents develop
I C. From the burner to air that is not touching it
D. From the water to the air
Answers
Answer:
a.) & d.)
Explanation:
It should ideally go from Mechanical, Electrical, thermal, light then chemical. I attached a similar example to better explain it.
The two transfers of thermal energy involved in this system are examples of radiation are From the burner to a nearby spoon and From the water to the air Hence, option a & d are correct
What is Heat Transfer ?
Heat transfer is a discipline of thermal engineering that concerns the generation, use, conversion, and exchange of thermal energy between physical systems.
Heat transfer is classified into various mechanisms, such as thermal conduction, thermal convection, thermal radiation, and transfer of energy by phase changes.
According to given question, Energy should ideally go from Mechanical, Electrical, thermal, light then chemical.
Therefore, The two transfers of thermal energy involved in this system are examples of radiation are From the burner to a nearby spoon and From the water to the air Hence, option a & d are correct
Learn more about Heat here ;
https://brainly.com/question/12947964
#SPJ2
Is ibuprofen conductive in water?
Answers
Most of the volume of an atom is occupied by
A protons
B the electron cloud
C valence electrons
the nucleus
Answers
Answer:
An atom is made of protons and neutrons which make up the nucleus and electrons that are around the nucleus. Although almost all the mass of an atom is in the nucleus, most of the space that the atom takes up is occupied by the electrons.
In very simple terms, the electrons are in orbits around the nucleus so most of the volume of the atom is empty space within the volume that the electrons occupy. The behaviour of the electrons is often assumed to be orbits but their actual positions are not that simple.
As a final note, all atoms contain neutrons with the exception of hydrogen which can exist as one proton and one electron.
Explanation:
A force is a push or pull that makes it possible to move an object. A force can also be used to
change the direction that an object is moving. The amount of force put on an object will
determine how far and fast the object will move. Nothing moves without some kind of force!
If you pull or push something, you are the force that is creating movement. The more you
push or pull, the farther and faster an object will go. But the heavier an object is, or the
more friction working against its movement, the harder it will be to move it.
What causes objects to move?
No
Answers
Answer:Forces include gravity, friction, and applied force. Force causes changes in the speed or direction of motion.
Explanation:
Answer:
Its force, Just did it. 100%
Explanation:
No explaination needed. I got it right.
Please help!
Fill in the blank
Answers
Answer:
carbon
Explanation:
Question 2 of 10
What charge does an ion have if it has more protons than electrons?
O A. Neutral, since protons are inside the nucleus
B. A net positive charge
C. A net negative charge
O D. No charge
SUBMIT
Answers
Answer:
B. A net positive charge
Explanation:
a p e x 2021!
Help me please !!!
Which of the following can be inferred from the diagram above that shows the dependence of potential Energy on the Internuclear distance between two atoms?
A)The atoms form a bond with a bond length of 25 pm
B)The atoms form a bond with a bond length of 75 pm
с)The net force between the atoms is attractive at 25 pm
D)The net force between the atoms is attractive at 75 pm
Answers
Answer:
B)The atoms form a bond with a bond length of 75 pm
A muffin has a mass of 100g and a volume of 500cm^3. What is the density of the muffin
Answers
Answer:
d = 0.2 g/cm³
General Formulas and Concepts:
Density = mass / volume
Explanation:
Step 1: Define
m = 100 g
V = 500 cm³
d = ?
Step 2: Find density
Substitute: d = 100 g/500 cm³Evaluate: d = 1/5 g/cm³Evaluate: d = 0.2 g/cm³The metal was known to have a density of 5.78 g/mL. A graduated cylinder was filled with 22.3 mL of water and after the metal was added the volume was 24.7 mL. What is the mass of the metal?
Answers
Answer:
The answer is 13.87 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
density of metal = 5.78 g/mL
volume = final volume of water - initial volume of water
volume = 24.7 - 22.3 = 2.4 mL
We have
mass = 5.78 × 2.4 = 13.872
We have the final answer as
13.87 gHope this helps you
What amount of heat is required to raise the temperature of 250 grams of water by 20°C? The specific heat of water is 4180 J/Kg
Answers
Answer:
The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs.
Explanation:
The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs.
