Assume that the variables x and y are directly related. If k = 8, what is the value for each of the following polnts? Be sure
and record your data to be used in the following problem.
Answers
Related Questions
Which of the following is a property of elements?
O
Elements have at least two different types of atoms.
Elements have their own individual characteristic properties.
Elements are can be separated from one another.
Elements have the ability to change into a different element.
Answers
How many grams of NaOH are produced from 2.1g of Na2O?
Na2O + H20 --> 2NaOH
Answers
Answer:
2.72g
Explanation:
The balanced equation of this reaction is given as follows:
Na2O + H20 --> 2NaOH
Based on this balanced equation, 1 mole of Na2O will produce 2 moles of NaOH.
First, we need to convert mass of Na2O into moles by using the formula;
mole = mass/molar mass
Molar mass of Na2O = 23(2) + 16
= 46 + 16
= 62g/mol
mole = 2.1g/62g/mol
mole of Na2O = 0.034mol
Hence, if 1 mole of Na2O will produce 2 moles of NaOH.
Then, 0.034mol of Na2O will produce (0.034 × 2) = 0.068mol of NaOH.
To convert mole of NaOH to mass, we use;
mole = mass/molar mass
Molar mass of NaOH = 23 + 16 + 1 = 40g/mol
0.068 = mass/40
mass of NaOH produced = 2.72g.
A pool float was filled with air to capacity in the middle of a hot day. The next morning the pool float looked different yet no gas escaped or entered the float. Describe what you think the float looked like in the morning and why it occurred.
Answers
Answer:
The pool float looked would have looked deflated the next morning.
Explanation:
When temperature decreases the volume decreases
Answer:
The pool float most likely looked a little deflated or pushed in
Explanation:
The pool float most likely looked a little deflated or pushed in. This is because during the night temperatures most likely dropped. These cold temperatures during the night would have caused the air molecules inside the pool float to come closer together which would cause there to be more excess space inside the pool float. Therefore, allowing it to collapse into itself. This would be far worse if the float was filled with helium or another gas other than O2.
2 H2 (g) + O2 (g) --> 2 H2O (l)
How many moles of hydrogen gas do you need to make 2 moles of liquid water?
Answers
Answer:
2H2(g]+O2(g]→2H2O(l]]. Notice that the reaction requires 2 moles of hydrogen gas and 1
Explanation:
How are Earth;s Days, Years, and Season’s related to the way Earth moves in Space?
Answers
explain in 3 complete sentences
Answers
Answer:Air in high pressure systems moves in an anticlockwise direction (in the southern hemisphere), while air in low pressure systems moves in a clockwise direction due to the rotation of the Earth. At the surface of the Earth air flows from high pressure systems into low pressure systems.
Explanation:
Warm air rises, creating a low pressure zone; cool air sinks, creating a high pressure zone. Air that moves horizontally between high and low pressure zones makes wind.Smaller pressure systems create localized winds that affect the weather and climate of a local area.
6. Find the number of molecules in 33.6 L of co, at STP? What is the name
of this compound?
!!!!!!PLEASE HELP!!!!!!!!!!
Answers
At STP, one mole of any gas occupies 22.4 L. So, at STP, 33.6 L of our gas contains (33.6 L)/(22.4 L/mol) = 1.5 moles.
One mole of any substance contains 6.022 × 10²³ particles, or in this case, molecules. So 1.5 moles contains (1.5 moles)(6.022 × 10²³ molecules/mole) = 9.03 × 10²³ molecules.
As you can see, in this case it doesn’t matter what the identity of the gas is. But it does matter when it comes to naming. If the substance is CO, as you’ve typed, its name is carbon monoxide. If the substance is CO2 as it’s presented in the image, then its name is carbon dioxide.
A box slides with an initial speed of 4.0 towards a spring on a frictionless horizontal surface. When the box
S
N
hits a spring with spring constant k = 150 the spring compresses by 0.30 m.
m
m
M
What is the mass of the box?
Answers
Answer: .84kg
Explanation:
Khan academy
A box slides with an initial speed of 4.0 kg m/s towards a spring on a frictionless horizontal surface. When the box hits a spring with spring constant k = 150 N/m, the spring compresses by 0.30 m.
What is the mass of the box?
Answer: 0.54 kg
What is the pH of a 0.30 M solution of Ca(OH)2?
Answers
Explanation:
30 to the second power
4Fe+3O2 →2Fe2O3
80.0 grams of iron are reacted with 50.0 grams of oxygen gas. Which of these reactants are the limiting reactant, and how many grams of iron (III) oxide would be produced?
Answers
Answer:
FFe
2
O
3
(
s
)
+
3
CO
(
g
)
→
2
Fe
(
s
)
+
3
CO
2
(
g
Explanation:
pls help and show work!!!
Answers
Answer:
44.9g
Explanation:
You have to convert grams of CH4 to moles, use the mole-to-mole ratio of CH4 to water, and convert back to grams.
(20.0g CH4)(1 mol CH4/16.04g)(2 mol H2O/1 mol CH4)(18.01 g H2O/ 1 mol) = 44.9127 g
Hope this helps!
What type of ionic compound is CO3?
Answers
Answer:
Carbon Trioxide
Explanation:
Its a Carbonite Ion which is also known as a polyatomic ion
You heat 100 mL of water and 1000 mL of water using 40,000 joules of energy. What would be the outcome of this experiment? *
A. The 100 mL of water would be a higher temperature than the 1,000 mL of water.
B. The 100 mL of water would be a lower temperature than the 1,000 mL of water.
C. They would both be the same temperature.
D. There is not enough information
Answers
Answer:
A. The 100 mL of water would be a higher temperature than the 1,000 mL of water.
Explanation:
Since the volume of water affects temperature, when the volume increases this results in a lower temperature. This means that the water with the smaller volume will have a higher temperature.
Please please help me!! It needs to be turned in in a few minutes!
Answers
Hope this helps:)
Brainiest please:)
Answer:
D. Thermal
Thermal is another energy the match gives off
How many moles are in 564 grams of copper
Answers
Answer:The answer is 63.546.
Explanation: The answer is 63.546. We assume you are converting between grams Copper and mole. You can view more details on each measurement unit: molecular weight of Copper or mol. The molecular formula for Copper is Cu. The SI base unit for amount of substance is the mole. 1 grams Copper is equal to 0.015736631731344 mole
Answer:
5.64 of copper
Explanation:
Given: 564 grams of copper
To find: in copper
Solution: If 1 grams Copper = 0.01 mole,
Then, 564 grams = multiply 564 and 0.01 mole
564 × 0.01 = 5.64
Therefore, there are 5.64 of copper in 564 grams
Which substances are compounds? Please help
Answers
Answer:
1 and 3
Explanation:
oh this one lol,, hope it helps
Answer:
1 and 3
Explanation:
hope this helps :)
4. What is the volume of 6.5 moles of Helium at STP?
|
Answers
Answer:
Volume of 6.5 moles of Helium at STP is 145.6954 L
Explanation:
As we know
[tex]pV = nRT[/tex]
At STP, temperature is 273.15 K and pressure is 1 atm
n is the number of moles which is equal to 6.5
R is the gas constant = 0.08206 L atm/K mol
Substituting the given values in above equation, we get -
[tex]1 * V = 6.5 * 0.08206 * 273.15\\V = 145.6954[/tex]Liters
Volume of 6.5 moles of Helium at STP is 145.6954 L
When hydrogen peroxide (H2O2) is used in rocket fuel, it produces water and oxygen (O2): Can someone help with parts B and C?
Answers
Answer:
Explanation: A foam forms when bubbles of a gas are trapped in a liquid or solid. In this case oxygen is generated when hydrogen peroxide breaks down into oxygen and water on contact with catalase, an enzyme found in liver. Enzymes are special protein molecules that speed up chemical reactions.
2-ciclopropilpropano
Answers
Answer:
cool
Explanation:
Which on is right O& Mg?
OMG
MgO
Mg2O2
Mg+2O-2
Answers
Answer:
MgO
is the correct answer
hope it helps
A photon of visible light can be emitted when
Select one:
O a. an excited electron jumps down to ground state
O b. a ground state electron absorbs energy
O c. a ground state electron jumps to a higher energy level
Answers
Answer:
a ground state electron jumps to a higher energy level
Calculate the molar mass of HCI.
Answers
1.008(H) plus (Cl)35.453= 36.458
How many moles are in 3.4*10²⁶ molecules of H2O?
Answers
Answer:
564.5027395 moles
Explanation.
a mole is 6.023×1023
(3.4×10^26)÷(6.023×10^23)= 564.5027395
A car with a mass of 3,500lbs accelerates negatively from 35m/s to 8m/s in 8s. What is the
car's negative acceleration?
Answers
Answer:
[tex]a=-3.37\ m/s^2[/tex]
Explanation:
Given that,
A car accelerates negatively from 35m/s to 8m/s in 8s.
We need to find the car's acceleration.
Initial speed, u = 35 m/s
Final speed, v = 8 m/s
Time, t = 8 s
The acceleration of an object is equal to the rate of change of velocity. So,
[tex]a=\dfrac{v-u}{t}[/tex]
Put all the values,
[tex]a=\dfrac{8-35}{8}\\\\a=-3.37\ m/s^2[/tex]
So, the acceleration of the car is equal to [tex]-3.37\ m/s^2[/tex].
Horticulture 100 POINTS Hurry
Which of the following is an example of an indirect expense?
A. corn oil
B. animal fodder
C. export commodity
D. snack foods
Answers
Answer:
B!
Explanation:
Answer:
i know im late but i just really want the points. the answer is b.
Explanation:
Which statement is true about the particles of a liquid when the liquid changes into a solid?
They move closer to each other.
Their kinetic energy increases.
They stop vibrating.
The attractive force between them decreases.
Answers
Answer:
they move closer to each other
Answer:
They move closer to each other
Explanation:
Got it right on the test
Hope this helps :)
What is the normality of a 2.0 M NaOH solution?
Answers
Answer:
Normality= molarityX total POSITIVE oxidation number of solute Solvent=substance present in the greatest amount Solute= all other substances in the solution +1 (1 na+) is the total POSITIVE oxidation number of NaOH 2.0X1= 2.0 N=2.0
Explanation:
I had the same question on one of my assignments earlier
Now that you have exercised, walked your
jackalope, made cookies, and had juice, you
decide on a nap. Your body uses melatonin to
tell your brain and body that it's ready to sleep
or nap. Melatonin has the chemical formula
C13H16N2O2. The amount in your body at any
time is very small - less than 10 milligrams
(0.01 g)! Convert the melatonin to moles so
you can rest
Answers
Answer: The moles of melatonin are 0.000043
Explanation:
According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]
Given mass of melatonin = 0.01 g
Molar mass of melatonin [tex](C_{13}H_{16}N_2O_2)[/tex] = 232.28 g/mol
[tex]\text{Number of moles of melatonin}=\frac{0.01 g}{232.28g/mol}=0.000043mol[/tex]
Thus the moles of melatonin in 0.01 g are 0.000043
The shoes are green, a size 8, have white laces, made out of cotton, and have a rubber sole. The description given is a list of ___________ properities of the shoes. Question 33 options:
chemical
mechanical
physical
structural
Answers
Answer:
Physical i think, because it says, "The shoes are green, made of cotton, and rubber sole" everything in the passage described a physical property
Explanation:
tell me if im wrong, good luck
Answer:
physical
Explanation:
its listing a size 8, which eliminates chemical and mechanical. Also it lists their green, which eliminates structural, leaving physical left
An electric car has a mass of 2,000 kg. the engine is producing a force of 3,500 N to move the vehicle forward,but it must overcome air friction equal to 500 N
What is the acceleration of the electric car m/s2?
record your answer and fill in below
Answers
Answer:
1.5 m/s²
Explanation:
From the diagram,
F-F' = ma............... Equation 1
Where F = Forward force of the vehicle, F' = Frictional force, m = mass of the electric car, a = acceleration of the car.
make a the subject of the equation
a = (F-F')/m........... Equation2
Given: F = 3500 N, F' = 500 N, m = 2000 kg
Substitute into equation 2
a = (3500-500)/2000
a = 3000/2000
a = 1.5 m/s²