Answer:
fluid D
Explanation:
Fluid D has the highest viscosity because it is more difficult for it to move which makes it hit the table at 15 seconds
while fluid C has the lowest Viscocity which makes it move easily and it hit the table fastest
which of the following subject area contains questions that can be answered by science?
Answer:
ASTRONOMY
Explanation:
im taking that test right now
i hope this helps :0
Answer:
forensics
Explanation:
took the test yay
2 Al + 3 Br2 --> 2 AlBr3
If 15.0 grams of AlBr3 are produced, how many grams of aluminum are needed?
Round your answer to two decimals.
Please i need this asap
Since AlBr3 is the sole product, we can use its coefficient to determine its molar ratio with Al. Conveniently, that ratio is 2:2 or, simplified, 1:1, which means that the number of moles of AlBr3 produced is equivalent to the number of moles of aluminum consumed in the reaction.
We must determine the number of moles of AlBr3 produced; we are given the mass of AlBr3 produced, so we divide the mass by the molar mass of AlBr3:
(15.0 g)/(266.694 g/mol) = 0.05624 mol AlBr3
Since the molar ratio of AlBr3:Al is 1:1, that means 0.05624 moles of Al were reacted. Now, all that is left is to convert the number of moles of Al to grams. We multiply the number of moles by the molar mass of Al:
(0.05624 mol)(26.982 g/mol) = 1.52 grams Al.
So, if 15.0 grams of AlBr3 are produced in this reaction, 1.52 grams of Al are needed.
A student makes several observations about a plece of iron. Which observation describes a chemical property of the Iron?
Answer:rust
Explanation:
PLEASE HELP!!!
Explain how an electric car might still run on fossil fuels.
Answer:
Explanation:
When you use electricity to charge your car, you can integrate renewable resources like solar into the fueling process. Without solar, your electric vehicle is still effectively running off of fossil fuels – it's just the fossil fuels utilized at the power plant and not within your engine.
Fossil fuels include substances like natural gas, coal, and oil. It is possible for electric cars to run on these fossil fuels. Fossil fuels like coal are burnt up to generate electricity. So when cars run on electricity, they are indirectly tapping into fossil fuels.
As the world continues to seek measures to reduce carbon emissions, electric cars are gradually becoming an option. While it is true that these fossil fuels might not be used directly on electric cars, they still find use indirectly in these cars. When coal is burnt up at the power plant to generate electricity, electric cars tap into fossil fuels indirectly.Learn more here:
https://brainly.com/question/10172005
Which of the following is true about limiting and excess reagents?
Links are reported
Answer:
the first one
Explanation:
I take this subject
A mass of 0.30 kg is attached to a spring that has a spring constant of 210 N/m. What will be the period of this system?
Answer:
its A hope this helps
Explanation:
Evidence of Earth’s plate tectonic activity is most obvious after an earthquake. Which explanation best describes this plate tectonic movement?
A: Earth’s plates stress one another. However, when an earthquake occurs, plate movement is due to an unbalanced force on the plates.
B: Earth’s plates are moving fast. However, the force of friction slows their movement.
C: The force of gravity causes the floating plates to move up and down. The plate movement sometimes results in earthquakes.
D: Earth’s plates continually place stress on one another. However, the force is balanced during an earthquake.
Answer:a
Explanation:bc
Plates on Earth are moving quickly. Yet, friction causes them to travel more slowly. So, the correct options are B and C.
What are tectonic plates?Tectonic plates are enormous fragments of the upper mantle and crust of the Earth. They are composed of both continental and oceanic crust. Earthquakes occur around mid-ocean ridges and the large faults which mark the edges of the plates.
The Earth's plates are shifting swiftly. Nevertheless, friction slows their movement. Gravity causes the floating plates to rise and fall. On occasion, the movement of tectonic plates results in earthquakes.
When compared to the Earth's mantle, the plates behave like solid, unyielding shells. The lithosphere is the name given to this thick outer layer.
Thus, the correct options are B and C.
Learn more about Tectonic plates, here:
https://brainly.com/question/30805154
#SPJ3
What kind of wave is a sound wave? Why?
Answer:
Sound waves in air (and any fluid medium) are longitudinal waves because particles of the medium through which the sound is transported vibrate parallel to the direction that the sound wave moves.
plz can i get brainliest:)
No links.
Calculate the pH and pOH of each solution.
a) [H + ] = 1.7 x 10 -8M
b) [H + ] = 1.0 x 10 -7M
Explanation:
first find the value of Ph
from Ph= -log[H+]
ph=-log[1.7x10^-8]=7.769
find Poh from 14=ph+poh
14=7.769+poh
Poh=6.231 part a
for part b the same as part a from the above procedure
Can someone help me out with these chemistry balancing equations questions?
Answer:
C4H6O3 + H2O → 2C2H4O2
C2H4 + 3O2 → 2CO2 + 2H2O
2C4H10 + 13O2 → 8CO2 + 10(H2O)
Explanation:
some plz help me make mnemonic to helpme remember the oder of the planets
Answer:
My - Mercury
Very- Venus
Excited- Earth
Mother- Mars
Just- Jupiter
Served- Saturn
Us- Uranus
Nachos- Neptune
Explanation:
Mark me Brainliest?
Answer:
My very encouraging made just us nachos
Explanation:
My stands for Mercury
Very stands for venus
Encouraging- Earth
made- Mars
just- Jupiter
Us- Uranus
Nachos- Neptune
When balancing chemical equations, it is okay to adjust
(3 points)
A.
coefficients.
B.
superscripts.
C.
subscripts.
D.
any of these.
Answer:
A
Explanation:
Thats the correct anwers
PLZ HELP!
Where have you seen or known of examples of waves in YOUR LIFE? Based on science terms of a wave.
Answer:
QUESTION:
Where have you seen or known of examples of waves in YOUR LIFE? Based on science terms of a wave.
ANSWER:
I've seen the following in my life:
~ Lightwaves
~ Heatwaves
~ Electromagnetic waves
~ X-rays
~ Tsunami Waves
Explanation:
Hope that this helps you out! :)
If you have any questions please put them in the comment section below this answer.
Have a great rest of your day/night!
Please thank me on my profile if this answer has helped you.
3. When aqueous solutions of sodium phosphate (Na3PO4) and chromium(III) chloride (CrCl3) react, chromium(III) phosphate forms as a
precipitate.
Identify the spectator ions and write a balanced net ionic
equation for this reaction.
The ions Cr3+ and PO,?-combine to form the precipitate.
Which two ions are spectator ions?
The net ionic reaction is Cr3+ + PO42 ..
The four ionic species initially in solution are Na⁺, PO₄³⁻, Cr³⁺, and Cl⁻. Since the precipitate is composed of Cr³⁺ and PO₄³⁻ ions, the spectator ions must be Na⁺ and Cl⁻.
The complete ionic equation is 3Na⁺(aq) + PO₄³⁻(aq) + Cr₃⁺(aq) + 3Cl⁻(aq) → 3Na⁺(aq) + 3Cl⁻(aq) + CrPO₄(s).
So the balanced net ionic equation for this reaction would be Cr³⁺(aq) + PO₄³⁻(aq) → CrPO₄(s).
Answers:
Which two ions are Spectator Ions?
Na+
Cl-
The net ionic reaction is Cr2+PO42...
Cr2(PO4)3
I will mark brainliest if all answered or if you don’t want to answer them all please just answer 9-15
Answer:
9. b
10.d
11.f
12.g
13.e
14.a
16.a
17.d
18.c
19.a
Explanation:
Can someone please help me with my chemistry hw
Answer:
a) 18
b)288g
Explanation:
a) 1:4
4.5mol TiCl4 so HCl is 4(4.5mol)
b) mm of HCl is 36
because 1:4 we multiply 2.0 mol by 4
8mol of HCl
we multiply 8mol by 36 (molar mass of HCl) and we get 288g because mol×molar mass= grams
What is an action citizens can take to prevent energy waste?
Answer:
Turning the lights off when they're not needed.
fill in the blank if its true or false
T=True
F=False
_________ 1. Stars do not change over their life cycles.
_________ 2. A protostar is the latest stage of a star’s life.
_________ 3. The larger the mass, the shorter the life cycle.
_________ 4. The hottest stars are blue and the coolest stars are red.
_________ 5. The white dwarf eventually runs out of fuel and dies as a red dwarf.
_________ 6. Our Sun is in the main sequence at the moment.
Answer: 1. F
2. F
3. T
4. F
5. T
6. T
Explanation:
I am not sure i'm sorry if it isn't right
Argon has a pressure of 34.6 atm. It is transferred to a new tank with a volume of 456 L and pressure of 2.94 atm. What was the volume of the original container?
Answer:
38.75 L
Explanation:
From the question,
Applying Boyles Law,
PV = P'V'....................... Equation 1
Where P = Original pressure of the Argon gas, V = Original Volume of Argon gas, P' = Final pressure of Argon gas, V' = Final Volume of Argon gas.
make V the subject of the equation
V = P'V'/P.................... Equation 2
Given: P = 34.6 atm, V' = 456 L, P' = 2.94 atm.
Substitute these values into equation 2
V = (456×2.94)/34.6
V = 38.75 L
For this reaction: ____NH3 + ____O2 ____NO + ____H2O a. How many moles of oxygen are needed to react with 3.24 moles of ammonia?
Answer:
uhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh this is hard I'm a come back when I solve it
How many moles of O₂ are needed to burn 2.5 moles of CH₃OH?
Answer:
3.75 moles
Explanation:
The chemical equation is 2CH₃OH + 3O₂ -> 2CO₂ + 4H₂O
2 moles of CH₃OH are burned by 3 moles of O₂
For 2.5 moles of CH₃OH are burned by x moles of O₂
Let's solve for x :
2*x=2.5*3 => 2*x=7.5 => x=3.75 moles of O₂ are needed to burn 2.5 moles of CH₃OH
What is the volume of a container that contains 12.6 grams of nitrogen at 25°C and 1100 kPa?
Answer:
1.0 L
Explanation:
Use the ideal gas law PV=nRT where P is pressure = 1100 kPa, V is the volume you are calculating, n is the number of moles which can be calculated by dimensional analysis and the periodic table, R is the ideal gas constant in this case R=8.314 kPa L/K mol, and T is the temperature in kelvins. See attached image for work through. 1.0 L is the answer with two sig figs.
24
Select the correct answer.
Which statement is correct?
A.
When the concentration of the reactant decreases, the cell potential increases.
B.
When the concentration of the reactant decreases, the cell potential does not change.
C.
When the concentration of the reactant increases, the cell potential decreases.
D.
When the concentration of the reactant increases, the cell potential increases.
E.
When the concentration of the reactant increases, the cell potential does not change.
Answer:
the answer is b
Explanation:
PLEASE HELP QUICKLY!! How many moles of NH4OH are in 0.125L of a 1.4 M solution of NH4OH?
Answer:
0.175mol
Explanation:
Molarity of a solution can be calculated thus:
Molarity (M) = number of moles (n) / volume (V)
According to the information provided in this question, volume of NH4OH = 0.125L, molarity = 1.4M
Using; Molarity = n/V
1.4 = n/0.125
n = 0.175mol
If the hydroxide ion concentration of a solution is 3.26 x 10-6 M, is it an acidic or a basic solution?
Answer: It is a basic solution with pH =8.51
Explanation:
We were given that hydroxide ion concentration [OH-] as 3.26 x 10-6 M
But We know thar
[OH-] [H+] = 1 × 10^-14
To get the Hydrogen ion [H+] concentration, we have that
[H+] = 1 × 10^-14 M/[OH-]
= 1 × 10^-14 M/3.26 x 10-6 M
= 3.067 x 10^-9 M
But, pH = - log [H+]
Therefore,
pH = - log (3.067 x 10^-9)
pH=8.51
when pH > 7, The solution is basic, therefore a solution with pH =8.51 is basic.
Vertical columns in the periodic table are called ______ of elements and have similar properties.
groups
period
Write two paragraphs about what would happen if your whole body was put in a low pressure environment ?
Answer:
Reduced air pressure also has a serious effect on the human body. Reduced air pressure means that there is less oxygen available to the body. For lungs to inflate, the air pressure in your lungs has to be less than the air outside the lungs. This is because air moves from high-pressure areas to low-pressure areas.
Explanation:
Reduced air pressure also has a serious effect on the human body. Reduced air pressure means that there is less oxygen available to the body. For lungs to inflate, the air pressure in your lungs has to be less than the air outside the lungs. This is because air moves from high-pressure areas to low-pressure areas.
What are the types of Asexual reproduction?
need this asap bro uyftghjkddfs
Answer:
The types of Asexual reproduction include: fission, fragmentation, budding, vegetative reproduction, spore formation and agamogenesis.
Convert 0.64 moles of table salt (NaCl) to grams
Answer:
0.64 moles of table salt = 37.44 grams of table salt
Explanation:
mNaCl = 0.64 x (23 + 35.5) = 37.44 grams
The pressure in a car tire is 178 kPa at 37°C. After a long drive, the pressure is 275 kPa. What is
the new temp of the air in the tire, assuming the volume is constant?
Answer:
T₂ = 478.93 K
Explanation:
Given that,
Initial pressure, P₁ = 178 kPa
Initial temperature, T₁ = 37°C = 310 K
Final pressure, P₂ = 275 kPa
We need to find the new temp of the air in the tire, assuming the volume is constant. We know that,
[tex]\dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}\\\\T_2=\dfrac{P_2T_1}{P_1}\\\\T_2=\dfrac{275\times 310}{178}\\\\T_2=478.93 K[/tex]
So, the new temperature is equal to 478.93 K.
