Answer:
When the cart gets to down-hill drop, for a moment it is at rest, until gravity (a force) acts upon the cart and causes it to accelerate downward.
Explanation:
Newton's second law says that when a constant force acts on a massive body, it causes it to accelerate, i.e., to change its velocity, at a constant rate. In the simplest case, a force applied to an object at rest causes it to accelerate in the direction of the force.
2.37 x 10-7
is
1 x 10-7,
greater than
less than
Answer:
greater than
Explanation:
help!
Upon hitting a fixed boundary, a wave is sent back with a phase change of _______ °.
A. 0
B. 180
C. 90
D. 45
Is it possible to modify the gases in our atmosphere?
Answer:
Yes, but it would a tremendous amount of time to do so
Explanation:
You could just spray a ton of hydrogen in the atmosphere and turn the oxygen to water
You want to spread honey on your toast, but it is too thick to spread. What term from today's lesson describes the "thickness" of the honey? How could you change the "thickness" of the honey?
Answer:
Since I was not present in your lesson, I can only guess your vocabulary words. I am guessing consistency though.
can water stay liquid below zero degrees Celsius? how can glass be a liquid if its so hard? what made the hole in the ozone go away?
What is the volume of 5.40 mole of O2?
The volume occupied by 5.40 mole of O2 is 120.96 L.
What is molar volume?The term molar volume refers to the volume of one mole of a gas. According to Professor Avogadro, the volume of one mole of a gas is 22.4 L.
Now, we are asked to find the volume of 5.40 mole of O2.
If 1 mole of O2 occupies a volume of 22.4 L
5.40 mole of O2 occupies 5.40 mole * 22.4 L/1 mole = 120.96 L
The volume occupied by 5.40 mole of O2 is 120.96 L.
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A 10,0-L cylinder of gas is stored at room temperature (20.0°C) and a pressure of 1800 psi. If the gas is
transferred to a 6.0-L cylinder, at what temperature in CELCIUS would it have to be stored in order for the
pressure to remain at 1800 psí? Reminder, convert your temperature to Kelvin before you begin the problem.
(Please put units)
Considering the Charles' law, the gas would have a temperature of -109.2 C.
Charles' lawFinally, Charles' law establishes the relationship between the volume and temperature of a gas sample at constant pressure. This law says that the volume is directly proportional to the temperature of the gas. That is, if the temperature increases, the volume of the gas increases, while if the temperature of the gas decreases, the volume decreases.
Charles' law is expressed mathematically as:
[tex]\frac{V}{T} =k[/tex]
If you want to study two different states, an initial state 1 and a final state 2, the following is true:
[tex]\frac{V1}{T1} =\frac{V2}{T2}[/tex]
Temperature of the gas in this caseIn this case, you know:
P1= 1800 psiV1= 10 LT1= 20 C= 293 K (being 0 C= 273 K)P2= 1800 psiV2= 6 LT2= ?You can see that the pressure remains constant, so you can apply Charles's law.
Replacing in the Charles's law:
[tex]\frac{10 L}{293 K} =\frac{6 L}{T2}[/tex]
Solving:
[tex]\frac{10 L}{293 K} T2=6 L[/tex]
[tex]T2=\frac{6 L}{\frac{10 L}{293 K} }[/tex]
T2=163.8 K= -109.2 C
The gas would have a temperature of -109.2 C.
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2. In the reaction below, which substances are considered reactants?
C2H60
+
O2
CO2
+
H2O
which of these are considered reactants
Answer:
see below
Explanation:
All of them are considered reactants because a reactant is a a substance that takes part in and undergoes change during a reaction.
deacribe strata! as short of an answer as possible please and help asap for brainliest
Answer:
sedimentary rock layer bounded by two stratification planes
Combustion analysis-empirical formula
I'm having trouble understanding the concept could someone help me to understand how to solve a question like this?
The complete empirical formula of the organic compound is C₅H₂.
What is empirical formula?Empirical formula is the simplest formula of an organic compound. The balanced chemical equation of the given organic compound can be determined using the general formula for balancing oxidation reaction of organic compounds as shown below.
[tex]C_xH_y + (x+ \frac{y}{4} )O_2 = xCO_2 \ + \ \frac{y}{2} H_2O[/tex]
Number of moles of the carbon dioxideMolecular mass of CO2 = 44 g/mol
mole = reacting mass /molecular mass
mole = 4.4/44 = 0.1
Number of moles of watermole = 0.72/18 = 0.04
From the empirical formula, we have [tex][?]_5H_{[?]} = C_5H_{[?]}[/tex]
[tex]0.1 \times n = 5\\\\ n = \frac{5}{0.1} = 50[/tex]
From the result above, if we multiply 0.1 by 50 we will have 5 which is already given to us as C₅.
[tex]x = 0.1 \times 50\\\\x = 5[/tex]
Then multiply 0.04 for y by the same factor.
[tex]y = 0.04 \times 50\\\\y = 2[/tex]
Thus, the complete empirical formula of the organic compound is C₅H₂.
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When the nonelectrolyte glucose is dissolved in water, the solution contains ________.
a. all glucose molecules
b. all glucose ions
c. nothing
d. mostly glucose molecules and a few ions
e. only OH- ions
What type of bonds are located between the nucleotides found in opposing DNA strands (i.e. the strands that are across from each other)?
Group of answer choices
van der waals
phosphodiester
hydrophobic
ionic
hydrogen
Answer:
hydrogen bond are found between nucleotides
What is the volume of 0.200 mol of an ideal gas at 200. kpa and 400. k? use p v equals n r t. and r equals 8.314 startfraction l times kilopascals over moles time k endfraction.. 0.83 l 3.33 l 5.60 l 20.8 l
3.33 liter is the volume of 0.200 mole of an ideal gas at 200 kPa pressure and 400 K temperature.
What is ideal gas equation?Ideal gas equation for gas will be written as:
PV = nRT, where
P = pressure of gas = 200 kPa
n = moles of gas = 0.2 mole
T = temperature of gas = 400K
R = universal gas constant = 8.314 L.Pa/K.mole
V = to find?
On putting all these values on the above equation, we calculate for V as:
V = (0.2×8.314×400) / 200 = 3.325 = 3.33 L
Hence, option (2) is correct i.e. 3.33 L.
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What type of chemical reaction is Cl2 + Cu → CuCl2?
I am not sure if it is Double displacement.
Answer:
Combination Reactions
Explanation:
That's not Double Replacements because DR is two different things change places with each other.
EX: A-B + C-D ---> A-D + C-B
Cl2 + Cu → CuCl2
This is Combination Reactions because CR is two or more things come together to make a single larger thing.
EX: A + B ---> A-B
What is any element that is a good conductor of heat and electricity and forms bonds/cations with non-metals?
A. Metal
B. Non-metal
C. Metalloid
What is the molarity of a solution prepared by dissolving 8 grams of BaCl2 in enough water to make a 450. 0 mL solution? (Hint: must convert grams to moles first).
Molarity is the molar concentration of the solute dissolved in a volume of a solution. The molarity of the solution prepared by dissolving barium chloride will be 0.085 M.
What is molarity?Molarity is the ratio of the moles of the solute to that of the volume of the solution in Liters. It can be given as,
[tex]\rm Molarity = \dfrac{moles}{Volume}[/tex]
Here, moles of the barium chloride can be given by the mass and the molar mass and volume is given as 0.450 L.
Substituting values in the equation:
[tex]\begin{aligned}\rm Molarity &= \rm \dfrac{mass}{Molar \;mass\times Volume}\\\\&= \dfrac{8}{208.23\times 0.450}\\\\&= 0.085\;\rm M\end{aligned}[/tex]
Therefore, 0.085 M barium chloride is the molar concentration.
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What is Delta.Hrxn for the overall reaction?
kJ
Answer:
The enthalpy change of the reaction comes out to be -890 Kj Explanation:To calculate the enthalpy of the reaction divided in multiple steps, we use Hess's law. This law states that the heat absorbed or evolved in a given chemical equation remains same whether the process occurs in one step or several steps.To apply this law, the enthalpy of the chemical equation is treated as ordinary algebraic expression and it can be added or subtracted to form the required equation. This means that the enthalpy change of the overall reaction is equal to the sum of the enthalpy changes that occur during intermediate reactions.
Explanation:
Answer:
A few definitions:
1. A river delta is a land-form created by deposition of sediment that is carried by a river as the flow leaves its mouth and enters slower-moving or stagnant water. This occurs where a river enters an ocean, sea, estuary, lake, reservoir, or another river that cannot carry away the supplied sediment.
2. The fourth letter of the Greek alphabet ( Δ, δ ), transliterated as ‘d’.
3. a code word representing the letter D, used in radio communication, mostly in the military
4. variation of a variable or function.
5. a finite increment.
This is not a plagiarized passage this is my knowledge and research.
Which is greater: the number of atoms in one mole of carbon, or the number of atoms in one mole of iron
The number of atoms in one mole of iron is greater than the one of carbon
Explanation:
This is because carbon has an atomic number of 6 while iron has a greater atomic number
Answer:
they are both the same
Explanation:
they are both 1 mole
What is the mass of 5 moles of He (g)
Answer:
the mass of 5moles of He is ; 1 mole =2g therefore 5moles=5*2=10g
Use the table of data for a decomposition reaction to answer the question Concentration (C) at T1 (g/L) C at T2 (g/L) C at T3 (g/L) Cat T4 (g/L) 100 300 50 50 Reactant 100 0 125 125 Product 1 100 125 125 0 Product N In a decomposition reaction a reactant breaks down to form two products. At which time did the system first reach chemical equilibrium? (1 point)
Based on the nature of chemical equilibrium, the system reached equilibrium first at the time T2.
What is chemical equilibrium?Chemical equilibrium refers to the state of a reversible chemical reaction in which the rate of forward reaction for the the formation is equal to the rate of backward reaction for the formation of reactants.
In the table of the decomposition reaction given above, the system reached equilibrium first at the time T2 when the concentration of the reactant and products were the same.
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Answer:
T3
Explanation:
I've taken the test
What is the three-dimensional shape of the molecule with this Lewis structure? A. Bent B. Linear C. Tetrahedral D. Trigonal planar.
Lewis structure is the electron dot representation of the atomic and molecular bonds of the molecules. Trigonal planar is the shape of the formaldehyde.
What is a trigonal planar shape?A trigonal planar shape of the molecule is the arrangement of the central atom attached to the other three atoms making them look triangle-shaped.
The attachment of the carbon to the two hydrogens and one oxygen atom can be given by the VSEPR theory. The number of the electron pair in the molecule is 3 making them [tex]\rm sp_{2}[/tex] hybridized and hence have a trigonal planar shape.
Therefore, option D. trigonal planar is the shape.
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10 POINTS!
Oxygen gas is
003
OH 20
002
answer is o²
please agree my answer and provide me more question
I need this ASAP :-(
The group number corresponds to _________________________.
A. Number of shells
B. Number of valence electrons
C. Atomic number
D. Atomic mass
Answer:
B
Explanation:
Group number corresponds to number of valence electrons, atomic number corresponds to number of protons and period number corresponds to number of shells
Nature versus nurture” can also be described as???
A 1.000 g sample of an unknown hydrate of copper chloride is gently dehydrated. The copper is isolated and weighs 0.248 g. Develop a method for determining the empirical formula of the copper compound and for determining the percent by mass of copper in the compound. Remark: The experimental data table obtained by the student is shown below. Data: Mass of crucible 20.43 g Mass of crucible + CuxCly • zH2O. 21.43 g Mass of crucible + CuxCly 20.976 g
Based on the data provided, the empirical formula of the compund is CuCl2.6H20 and the percentage mass of copper is 24.8%.
What is empirical formula?Empirical formula is a formula showing the simplest ratios in which elements in the compund are combined.
From the data provided:
Mass of Hydrated Copper chloride = 1.00 g
Mass of dehydrated Copper chloride = 20.976 - 20.43 = 0.546 g
Mass of Water = 21.43 - 20.976 = 0.454 g
Mass of Copper = 0.248 g
Masd of Chlorine = 1.00 - (0.454 + 0.248) = 0.298
Mole ratio:
Cu = 0.248/64 = 0.004
Cl = 0.298/35.5 = 0.008
H2O = 0.454/18 = 0.025
Dividing with the smallest value:
Cu = 0.004/0.004 = 1
Cl = 0.008/0.004 = 2
H2O = 0.025/0.004 = 6
Therefore;
Empirical formula = CuCl2.6H20
Percentage mass of copper = 0.248/1.00 × 100%
Percentage mass of copper = 24.8%
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1) What gives an objedt gravity?
2) Why do you feel the force of Earth's gravity?
3) What two properties affect the strength of gravity?
4) If the mass of an object increases, how is the force of gravity effected?
5) What happens to the gravity between two objects when the distance
between them increases?
Help
I am very bad :(
1) the mass of an object gives gravity, the more massive an object is the more gravity it has on the things around it
2)the earth's mass is so much greater than our own that we feel it's gravity stronger than say the moon which has a smaller mass than the earth
3) mass and how far away you are from the object
4)as mass increases so does gravity (sorry I do not remeber the equation but there are some specific ones for different situations between two massive objects)
5) when distance increases, gravity decreases (again I do not remeber by how much)
A cup of hot water is placed on a table. Which condition will cause the water in the cup to cool most quickly? A. the cup is hotter than the water B. the cup is made of insulating foam C. the air surrounding the cup is not moving D. the air temperature is less than the water temperature A cup of hot water is placed on a table. Which condition will cause the water in the cup to cool most quickly? A. the cup is hotter than the water B. the cup is made of insulating foam C. the air surrounding the cup is not moving D. the air temperature is less than the water temperature
Answer:
d. trust me
Explanation:
all the other answers point to why the cup stays hot.
Explain why the process of differentiation is not similar to the process of crossing over?
Answer:
hope it will help u
Explanation:
Matk me as brainlist plssaa
Nitrogen gas at 20. °c in a balloon has a volume of 3.0 l and pressure of 1.5 atm. if the temperature of the balloon is increased to 30. °c and the pressure to 2.5 atm, what is the new volume of the balloon? use the formula: p1v1 t1 = p2v2 t2 temperature conversion: °c 273 k
The new volume of the balloon which was initially 3 L is 1.86 L
Data obtained from the question Initial temperature (T₁) = 20 °C = 20 + 273 = 293 KInitial volume (V₁) = 3 L Initial pressure (P₁) = 1.5 atm New temperature (T₂) = 30 °C = 30 + 273 = 303 KNew pressure (P₂) = 2.5 atmNew volume (V₂) =? How to determine the new volumeThe new volume of the balloon can be obtained by using the combined gas equation as illustrated below:
P₁V₁ / T₁ = P₂V₂ / T₂
(1.5 × 3) / 293 = (2.5 × V₂) / 303
Cross multiply
293 × 2.5 × V₂ = 1.5 × 3 × 303
732.5 × V₂ = 1363.5
Divide both side by 732.5
V₂ = 1363.5 / 732.5
V₂ = 1.86 L
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Answer:
1.9L !!!!!
Explanation:
Can someone please help me? :(
Answer:
C D
Explanation:
NOAA airplanes continuously transmit measurements of pressure, humidity, temperature, and wind direction and speed as they fall toward the sea, providing a detailed look at the structure of the storm and its intensity.