Answers
1. density of liquid: 1 g/cm³
2. density of unknown liquid: 2.7 g/cm³
Further explanationDensity is a quantity derived from the mass and volume
Density is the ratio of mass per unit volume
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
m = mass
v = volume
1
.[tex]\tt \dfrac{156-56}{100}=1~g/cm^3[/tex]
2.[tex]\tt \dfrac{27}{(\dfrac{30-20}{1}) }=2.7~g/cm^3[/tex]
Related Questions
The mass of a sample of silver(Ag) is 53.93 g. How many atoms does it contain?[Ag=107.86]
Answers
Answer:
3.01 × 10²³ atoms
Explanation:
Given data:
Mass of sample of silver = 53.93 g
Number of atoms of silver = ?
Solution:
Number of moles of silver:
Number of moles = mass/ molar mass
Number of moles = 53.93 g/ 107.86 g/mol
Number of moles = 0.5 mol
Number of atoms of silver:
1 mole = 6.022 × 10²³ atoms
0.5 mol × 6.022 × 10²³ atoms /1 mol
3.01 × 10²³ atoms
Which has the higher average temperatures, white dwarfs or supergiants?
Answers
Answer:
White dwarfs are hotter
Explanation:
2Al+3Cl2---> 2AlCl3 (i cant remember if this is balanced equation or not if not can you do that too? thank you i appreciate it.)
If I have 5.0 g Aluminum how much AlCl can I produce?
Step 1 convert grams Al to moles Al: (the dashes resemble a fraction)
5.0 g Al
----------- times -------------- =
Step 2: convert mol al to mol AlCl3
0.19 mol Al
---------------- times --------------- =
1
step 3: convert MOL AlCl3 to GRAMS AlCl3
0.19 mol AlCl3
--------------------- times ---------------- = 25.4 g AlCl3
1
THIS FIRST # PART PROBLEM IS STOICHEMITRY for chemistry if you know please help me out I have been struggling on this for a week now..thank you so much.
This next part is LIMITING REACTANTS:
If Al produces 25.4 g of AlCl3 and Cl2 gas produces 20.0 g AlCl3 what is my limiting reactant, Al or C2??
How do i determine my percent yeild if my actual yeild is 19.5g???
i put a link to the picture!!
Answers
Answer:
the equation is balanced bro
8. Which of the following elements reacts like calcium (Ca) but with less atomic
mass?
Potassium (K)
Magnesium (Mg)
Strontium (Sr)
Scandium (Sc)
Answers
Answer:
Magnesium (Mg)
Explanation:
An element with a lower atomic mass than Calcium that has similar chemical property is the element Magnesium (Mg).
This because, elements in the same group or family on the periodic table has similar chemical properties.
Magnesium belongs to the same group as Calcium, other elements are:
Be Mg Ca Sr Ba Ra
The group is made of the alkaline earth metals. They have two valence electrons in their outer shell.
635 mL of a gas is at a pressure of 8.00 atm. What is the volume of the gas at standard pressure (1 atm) (STP)? (Boyle)
Answers
Answer:
5080 mLExplanation:
The volume of the gas at standard pressure can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we are finding the new volume
[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]
From the question we have
[tex]V_2 = \frac{635 \times 8}{1} \\ [/tex]
We have the final answer as
5080 mLHope this helps you
Which of the following statements are true about effusion of gases.
A. At the same temperature, lighter molecules move at a higher velocity than heavier ones.
B. Diffusion and effusion are similar because both involve the motion of gas molecules from
regions of higher concentration to lower concentration.
C. Effusion involves the movement of gas molecules through a small hole in a container.
D. According to Graham's Law, the relative rates of effusion of two gases is directly proportional
to the squares of their molar masses.
Answers
A. At the same temperature, lighter molecules move at a higher velocity than heavier ones.
B. Diffusion and effusion are similar because both involve the motion of gas molecules from
regions of higher concentration to lower concentration.
C. Effusion involves the movement of gas molecules through a small hole in a container.
D. According to Graham's Law, the relative rates of effusion of two gases is directly proportional
to the squares of their molar masses.
Effusion refers to the movement of a gas through a small hole. It is different from diffusion which involves the movement of a gas from a region of higher concentration to a region of lower concentration.
The effusion of a gas is described by Graham's law. According to Graham's law, the rate of effusion of a gas is inversely proportional to the square root of the molar mass of the gas.
The following are true regarding the effusion of a gas;
At the same temperature, lighter molecules move at a higher velocity than heavier ones.Effusion involves the movement of gas molecules through a small hole in a container.Learn more: https://brainly.com/question/8804761
What happens when the thermal energy of a substance increases?
Answers
Answer:
Both the motion of the particles in the substance and the temperature of the substance increase.
Answer The motion of the particles in the substance increases, and the temperature of the substance decreases.
Explanation:
The energy released in cellular respiration helps an athlete perform. How do you think an athlete might be able to increase cellular respiration?
Answers
Answer:
by eating healthy food and having a balanced diet also by exercising
An athlete might be able to increase their cellular respiration through the consumption of a balanced diet along with a regular exercising pattern.
What is Cellular respiration?Cellular respiration may be defined as a process through which organisms break down the molecules of glucose within the cell in order to avail energy in form of ATP for metabolic and cellular processes.
As we all know that glucose molecules and oxygen are the reactants for cellular respiration. So, a better level of glucose can be availed by a healthy and balanced diet and a standard oxygen level can be availed through a regular exercising pattern.
Therefore, an athlete might be able to increase their cellular respiration through the consumption of a balanced diet along with a regular exercising pattern.
To learn more about Cellular respiration, refer to the link:
https://brainly.com/question/2809259
#SPJ2
What is the result of the process that occurs in the image?
Answers
Ionic Bonding (the transfer of valence electrons)
Answer:
Ok:
Explanation:
Sodium gives fluorine an electron. This is in part due to electronegativity differences because sodium likes to lose an electron and fluorine likes to gain. As a result, sodium and become positively charged and fluorine negatively charged. This will for electrostatic attraction and the sodium and fluorine will form a bond. This bond is called an ionic bond.
A given sample of a gas has a volume of 3 liters at a
pressure of 4 atmospheres. If temperature remains
constant and the pressure is changed to 6
atmospheres, the P x V product will equal
A). 9 B) 12 C) 18 D) 24
Answers
Answer:
B) 12
Explanation:
Given parameters:
Initial volume = 3L
Initial pressure = 4atm
Final pressure = 6atm
Unknown:
Final volume = ?
Solution:
To solve this problem, we apply Boyle's law which states that "the volume of a fixed mass of a gas varies inversely as the pressure changes if the temperature is constant".
P₁V₁ = P₂V₂
P and V are pressure and temperature values
1 and 2 are initial and final states.
PV product = 3 x 4 = 12
The [tex]P \times V[/tex] product of this given sample of gas is equal to: B) 12 atm.
Given the following data:
Initial volume = 3 Liters Initial pressure = 4 atm. Final pressure = 6 atm.To determine the [tex]P \times V[/tex] product of this given sample of gas, we would apply Boyle's law:
Boyle's law states that when the temperature of an ideal gas is kept constant, the pressure of the gas is inversely proportional to the volume occupied by the gas.
Mathematically, Boyle's law is given by the formula;
[tex]PV = k\\\\P_1V_1 = P_2V_2[/tex]
Where;
P is the volume of a gas.V is the pressure of a gas.Substituting the given parameters into the formula, we have;
[tex]P \times V = 4 \times 3\\\\P \times V = 12\;atm[/tex]
Find more information: https://brainly.com/question/1437490
The lead pipe has a mass of 200 g, how much will be left after 6 months?
Answers
Answer:
33g
Explanation:
200 divided by 6=33.33
How is cosmic microwave background radiation evidence for the Big Bang?
Answers
Answer:
In explanation,
Explanation:
Tests of Big Bang: The CMB. The Big Bang theory predicts that the early universe was a very hot place and that as it expands, the gas within it cools. Thus the universe should be filled with radiation that is literally the remnant heat left over from the Big Bang, called the “cosmic microwave background", or CMB.
What type of bond occurs between tow nonmetals.
Answers
Answer:
covalent bonds............
covalent bonds
Ionic bonds structure when a nonmetal and a steel alternate electrons, while covalent bonds form when electrons are shared between two nonmetals. An ionic bond is a type of chemical bond formed through an electrostatic enchantment between two oppositely charged ions.
how can we tell a piece of metal is hot
Answers
Answer:
touch it :)
Explanation:
Answer: I Believe The answer to this question is to hover your hand over the piece of Metal, life what'd you do in a house fire to tell if the doorknob is hot.
Explanation:
Which of the following is a compound?
A. Ne
B. N2
C. NaCl
D. O2
Answers
Answer:
C
Explanation:
Answer:
NaCl
Explanation:
Because it's sodium chloride
A rock _____ can get polished from water running over it?
A. in between other rocks
B. in a river
C. On top of a mountain
D.Under a sidewalk
Answers
Answer:
The answer is B. A river is a body of water, therefore, there will always be some water running over the rock.
Answer:
The answer is: B
Explanation:
The reason for this is because when a rock is underwater (the river, in this case), the water runs across it non-stop until the rock is removed from the water. The only way it can be polished if it is submerged under the water for quite some time (years and years).
I hope this helped! :))
What is the percentage of each element? Mg(NO3)2
Please give an explanation!!
Answers
Answer:
Magnesium (Mg) is 1, Nitrogen is 2, and Oxygen is 6
Explanation:
the reason Nitrogen is 2 and Oxygen is 6, is because the number after the parenthesis means you have multiple whatever is inside the parenthesis by that number.
Can you divide II by another factor and still have it be correct? Why or why not?
Answers
Answer:
no, because factors can not be divided
Explanation:
calculate the amount in moles of so3 form when 0.36mol so2 react with excess o2
Answers
Answer:
0.36 moles
Explanation:
Given data:
Number of moles of SO₃ form = ?
Number of moles of SO₂ react = 0.36 mol
Solution:
Chemical equation:
2SO₂ + O₂ → 2SO₃
Now we will compare the moles of SO₃ with SO₂.
SO₂ : SO₃
2 : 2
0.36 : 0.36
Thus, from 0.36 moles of SO₂ 0.36 moles of SO₃ formed.
If a substance begins with 64 atoms of radioisotope,how many will remain after two half-lives 
Answers
Which term answers the question "how fast in what direction"
Question 3 options:
position
distance
velocity
speed
Answers
A measured sample of argon gas has a volume of 20.0 L at a pressure of 660 mm Hg. What is the final volume
if the pressure is decreased to 550 mmHg?
O A. 5.5 L
O B. 17 L
OC. 24 L
OD. 240 L
Answers
Answer:
C . 24 L
Explanation:
Given data:
Initial volume of gas = 20.0 L
Initial pressure of gas = 660 mmHg
Final volume = ?
Final pressure = 550 mmHg
Solution:
The given problem will be solved through the Boly's law,
"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"
Mathematical expression:
P₁V₁ = P₂V₂
P₁ = Initial pressure
V₁ = initial volume
P₂ = final pressure
V₂ = final volume
Now we will put the values in formula,
P₁V₁ = P₂V₂
660 mmHg × 20.0 L = 550 mmHg × V₂
V₂ = 13200 mmHg. L/ 550 mmHg
V₂ = 24 L
Help Plzz Will give all points
Answers
Answer:
reqirured mediem
Explanation:
Answer:
reqirure a mediem
Explanation:
what state of matter has more volume?
Answers
Answer:
please mark as brainliest
Explanation:
ans: Gas
The particles of matter in the gaseous state are neither close together nor fixed in place. The gas expands to fill its container. Thus, a given number of particles will have the greatest volume in the gas state.30/06/2014
How does electroplating use electrolysis
Answers
Answer:
Electroplating is the process that uses electric current to reduce dissolved metal ions by the use of electrolysis, to obtain the dissolved metal ions at the other electrode, mostly in the format of a uniform coating.
help me pls
. About how often does the Moon complete an orbit around Earth? ?
Answers
Answer:
approximately 27 days
Explanation:
what is part of the modern atomic model but no previous model.
A) a nucleus
B)circular electron paths
C)A positive particle
D) electron clouds
Answers
Answer: D
Explanation:
I don’t have an explanation. I got the answer wrong, I put “Circular electron paths”, when really it’s Electron Clouds.
Answer:D : Electron Clouds
Explanation:
is defined mathematically, describing a region with a high probability of containing electrons
Why
are the physical properties of isotopes differ slightly from each other?
Answers
Answer:
Isotopes of an element have different physical properties.
Hope I can help you have a nice day.
Calculate the mass (in g) of 2.1 x 1026 atoms of Os.
Answers
Answer:
66326.8 g Os
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:
Step 1: Define
2.1 × 10²⁶ atoms Os
Step 2: Identify Conversions
Avogadro's Number
Molar Mass of Os - 190.2 g/mol
Step 3: Convert
[tex]2.1 \cdot 10^{26} \ atoms \ Os(\frac{1 \ mol \ Os}{6.022 \cdot 10^{23} \ atoms \ Os} )(\frac{190.2 \ g \ Os}{1 \ mol \ Os} )[/tex] = 66326.8 g Os
Step 4: Check
We are given 2 sig figs. Follow sig fig rules and round.
66326.8 g Os ≈ 66000 g Os
can you easily make 1-bromopentane as the only product from the reaction of 1 pentene with HBr and why
Answers
Due to the fact that Br- is attached to carbon which contains lower number of H atom. Therefore, the statement is not true.