Answer:
True
Explanation:
They have four distinct stages: egg, larva (caterpillar), pupa (chrysalis), and adult. For monarch butterflies, it takes about a month to grow from an egg to an adult.
The life cycle of a frog consists of three stages: egg, larva, and adult.
Answer:
false butterfly's do not
What quality is attributed to water due to “capillary action”?
A. change of liquid water into gaseous phase
B. the ability of water molecules to adhere to the surfaces of objects
C. high volatility
D. vapor pressure
Answer:
I think it's B. The ability of water molecules to adhere to the surfaces of objects
A balloon has a volume of 7.00 liters at a pressure of 740 mm Hg. If the temperature remains constant, at what pressure will the volume decrease to 2.00 liters?
a. 749 mm Hg
b. 52.9 mm Hg
c. 211 mm Hg
d. 2590 mm Hg
Answer:
D
Explanation:
P1 x V1 = P2 x V2
7.00(740) = x(2.00)
2590 mm Hg
took me a while because i dont know this, hope its right good luck
When 12.00 moles of potassium chlorate decomposes, how many dm3 of oxygen are produced at 325K and 188 kPa?
2KClO3 →2KCl + 3O2
show work pls
Answer:
258.71 dm³
Explanation:
We'll begin by calculating the number of mole of O₂ produced by the decomposition of 12 moles of KClO₃. This can be obtained as follow:
The balanced equation for the reaction is given below:
2KClO₃ —> 2KCl + 3O₂
From the balanced equation above,
2 moles of KClO₃ decomposed to produce 3 moles of O₂.
Therefore, 12 moles of KClO₃ will decompose to produce = (12 × 3)/2 = 18 moles of O₂.
Finally, we shall determine the volume of the O₂. This can be obtained as follow:
Temperature (T) = 325 K
Pressure (P) = 188 KPa
Number of mole (n) = 18 moles
Gas constant (R) = 8.314 KPa.dm³/Kmol
Volume (V) =?
PV = nRT
188 × V = 18 × 8.314 × 325
188 × V = 48636.9
Divide both side by 188
V = 48636.9 / 188
V = 258.71 dm³
Thus, 258.71 dm³ of oxygen were obtained from the reaction.
A. If the mass of Hydrogen is 1 amu, what is the mass of Hydrogen in the reactant side of the equation above?
B. what is the mass of Hydrogen on the product side of the equation above?
Answer:
there are 4 hydrogen so
A.the mass of Hydrogen in the reactant side of the equation above is 1×4=4 amu.
B.the mass of Hydrogen on the product side of the equation above =1×4=4 amu.
Note: mass of reactant =mass of product.
What are the missing coefficients for C3H8 + o2 = Co2 +H2O
Answer: C3H8 + 5O2 = 3Co2 +4H2O
Explanation: Equations must be balanced
You must have the same amount of C
H and O on both sides of the equation
Which of these pure substances is NOT a compound?
a. water
b. table salt
c. tin metal
Answer:
C
Explanation:
A is made of 2 hydrogen 1 oxygen
B is sodium chloride
C tin is a single element
√625/1000
simplification
Answer:
[tex]\dfrac{1}{40}[/tex]
Explanation:
To find [tex]\dfrac{\sqrt{625}}{1000}[/tex], then we have to solve the square root "625".
A square root is regarded as a factor that occurred from a number, that is when such a number is being multiplied by itself, it gives the actual number.
SO;
[tex]\dfrac{\sqrt{625}}{1000} \\ \\ = \dfrac{25}{1000} \\ \\ = \dfrac{5}{200} \\ \\ \mathbf{= \dfrac{1}{40}}[/tex]
Question 1
What term is used to describe atoms of the same element that have different masses?
O A) radioactive
B) constituents
C) telomers
OD) isotopes
E) None of the above
Answer:
Isotopes
Explanation:
iso means the same like in triangles (isosceles) so the atoms are the same element but different in mass. Since the isotopes have the same number of protons and electrons the isotopes have much the same chemical behavior. Since the isotopes have different numbers of neutrons the nuclear behavior differs.
You need to make 7.2 L of 0.8 M Ca(C2O4) What molarity would the Ca(C2O4) need to be if you were to use only 3.5 L of it ?
Show work
Answer:
i think its 7.4
Explanation:j
dgctfvybhuinjok;l,'
Which of the following alcohols would be the
least miscible with water?
1. methanol (CH3OH)
2. pentanol (CH3CH2CH2CH2CH2OH)
3. ethanol (CH3CH2OH)
4. hexanol (CH3CH2CH2CH2CH2CH2OH)
5. propanol (CH3CH2CH2OH)
Answer:
im not entirely sure but its 3, pentalnol
Hexanol will be the least miscible in the water. Option D is correct.
What is Solubility?
It is the property of a compound to form a homogenous mixture when mixed with a liquid solvent.
The solubility of alcolol is reduced with an increase in the length of the carbon chain.
Therefore, hexanol will be the least miscible in the water because it has the largest carbon chain among the given molecules.
Learn more about Solubility:
https://brainly.com/question/14281540
Calculate the volume of solvent present in a 55.5%
by volume of 10.5 mL alcohol solution.
Answer:
I dont know
Explanation:
good luck
When might a doctor prescribe
steroids?
4. Nitinol alloy is a valuable industrial material mainly because of its (check
all that apply)
A. elasticity
B. color
C. strength
D. brittleness
Answer:
strength is the correct answer
The solubility of N2in blood at 37°C and at a partial pressure of 0.80 atm is 5.6 × 10−4mol/L. A deep-sea diver breathes compressed air with the partial pressure of N2equal to 4.0 atm. Assume that the total volume of blood in the body is 5.0 L. Calculate the amount of N2gas released (in liters at 37°C and 1 atm) when the diver returns to the surface of the water, where the partial pressure ofN2is 0.80 atm.
Solution :
According to Henry's law of solubility, we have c = kp
Henry's law constant, [tex]$k=\frac{c}{p}$[/tex]
[tex]$=\frac{0.00056}{0.80}$[/tex]
= 0.0007 mol/L.atm
When the pressure is = 4 atm
The solubility is c = 0.0007 mol/(L.atm) x 4 atm
= 0.0028 mol/L
Therefore, in a 5 liter of blood, the moles of nitrogen dissolved
= 0.0028 x 5
= 0.014 moles
At the surface, the solubility is = 0.00056 mol/L
So the moles of the nitrogen dissolved = 5 x 0.00056
= 0.0028 moles
Therefore, the number of moles of nitrogen released = 0.014 - 0.0028
= 0.0112 moles
Given total pressure = 1 atm
Temperature = 37 degree C
= 37 + 273
= 310 K
R = [tex]$0.0821\ L -atm/ mol.K $[/tex]
Therefore, volume of the nitrogen is
[tex]$V=\frac{nRT}{P}$[/tex]
[tex]$V=\frac{0.0112 \times 0.0821 \times 310}{1}$[/tex]
= 0.285 L
Question 6 (4 points)
(08.02 MC)
What is the percentage by mass of solution formed by dissolving 27.0 grams of HCl in 102.0 grams of water? (4 points)
а
26.596
D
20.946
с
18.296
d
16.796
Answer:
20.9%
Explanation:
I took the test i hope this helps:)
The percentage by mass of solution formed by dissolving 27.0 grams of HCl in 102.0 grams of water is 20.93%. This is calculated using the definition (formula) of percentage by mass of a solution.
What is meant by percentage by mass?The mass percent of a solution is defined as the ratio of the mass of solute that is present in a solution, relative to the mass of the solution, as a whole.
The formula for percentage by mass is given as
percentage by mass = (mass of the solute/ total mass of the compound solution) × 100
Calculating percentage by mass for the given solution:The mass of the solute ( the chemical which is going to be dissolved) HCl
= 27.0 grams
The mass of the solvent (the substance in which a solute dissolve) water
= 102.0 grams
So, the total mass of the solution = 27.0 + 102.0 = 129.0 grams
Then, the percentage by mass = [tex]\frac{27.0}{129.0}[/tex] × 100 = 20.93%
Which is approximate equal to 20.946 at option B.
Therefore, the percentage by mass of solution formed by dissolving 27.0 grams of HCl in 102.0 grams of water is 20.93%.
Learn more about percentage by mass here:
https://brainly.com/question/17812901
#SPJ2
When two substances at room temperature are combined, the product feels HOT. What
kind of reaction is this?
Answer:
The correct answer is - exothermic reaction.
Explanation:
Exothermic reactions are the reaction that releases energy into the surrounding and does not require energy to take place due to the total energy of the reactants the total energy of the products is more than tthe total energy of the products. It releases energy usually as heat or light with the product.
In the given condition of room temperature mixing two substance produces hot products, fits with the explanation given above, therefore, it is an exothermic reaction.
How do people determine if a vehicle in which they are sitting is moving?
Group of answer choices
A.by comparing their position to a fixed object inside the vehicle
B.by comparing their position to a fixed object outside the vehicle
C.by comparing their position to a moving object inside the vehicle
D.by comparing their position to a moving object outside the vehicle
Answer:
B.
Explanation:
The only way to make this comparison is by comparing their position to a fixed object outside the vehicle. Comparing to a fixed object inside the vehicle will show no movement, while a moving object inside the vehicle will seem as though the car is still while the object is in motion. Comparing to a moving object outside the vehicle will conflict with the vehicle, if the object is moving at the same speed and direction as the vehicle, it will seem as though neither is moving. The only way to make this comparison correctly is by comparing to an object outside the vehicle that is not moving so that the only variable that can be moving is the vehicle itself.
manganese (V) carbonate + nickel (II) phosphite -->
Answer:
[tex]3Mn_2(CO_3)_5+5Ni_3(PO_3)_2\rightarrow 15NiCO_3+2Mn_3(PO_3)_5[/tex]
Explanation:
Hello there!
In this case, for the given reactants side in this chemical reaction, it is possible for us to firstly write the left side of the undergoing chemical equation as shown below:
[tex]Mn_2(CO_3)_5+Ni_3(PO_3)_2\rightarrow NiCO_3+Mn_3(PO_3)_5[/tex]
Which means that the products are nickel (II) carbonate and manganese (V) phosphite. Next, we balance the reaction as shown below:
[tex]3Mn_2(CO_3)_5+5Ni_3(PO_3)_2\rightarrow 15NiCO_3+2Mn_3(PO_3)_5[/tex]
Which makes 15 carbonate ions, 10 phosphite ions, 15 nicked (II) ions and 6 manganese (V) on both sides of the chemical equation.
Best regards!
A 3.8 g sample of sodium hydrogen carbonate is added to a solution of acetic acid weighing 10.8 g. The two substances react, releasing carbon dioxide gas to the atmosphere. After the reaction, the contents of the reaction vessel weigh 11.6 g. What is the mass of carbon dioxide released during the reaction
Answer:
3.0 g
Explanation:
The total mass at the beginning of the reaction is:
3.8 g + 10.8 g = 14.6 gFollowing the law of conservation of mass, this same mass has to be present once the reaction is complete. This means that the mass diference between the contents of the reaction vessel after the reaction and the mass at the beginning of the reaction is the mass of released carbon dioxide:
14.6 g - 11.6 g = 3.0 ggiven mass of nitrogen is 0.12 dm^3 at 60°C and 1.01*10^5 Nm^2. Find its pressure at the same temperature if its volume is changed to 0.24 dm^3
50500Nm^2 or 5.05Nm^2
Explanation:
so bring out the parameters
p1= 0.12dm3, T1= 60c , because temperature is in kelvin add 273= 333k, v1= 0.12dm3 , T2= to the same value because the temperature didn't change = 333k, v2= 0.24dm3,P2= ?
general gas equation p1v1 over T1 = P2V2 over T2, when you input everything or make p2 the subject of the formula first you'll get the answer, pressure can have an s.i unit of mmhg but I'm using the same si unit as the question given and always check your units in the question to convert. please if this question has options please check, I don't want you to fail so verify from others if I made a mistake
In calorimetry, energy is measured through heat transfer from one substance to
another. Which of the following is NOT a method of heat transfer?
Answer:
Refraction
Explanation:
Why does dark chocolate melt faster in the sun?
Claim
Evidence
Reasoning
Explanation:
The reason as to why the dark chocolate always melted the fastest was because of it's colour. It was a darker shade than the milk and white chocolate and the sun naturally absorbs dark colours therefore it melted faster.

https://prezi.com › science-project
What happens when KCl is dissolved in water?
1.
KCI is the solute in a homogeneous mixture.
2.
KCl is the solute in a heterogeneous mixture.
3
KCI is the solvent in a homogeneous mixture.
4.
KCI is the solvent in a heterogeneous mixture.
Answer:
KCI is rhe solute in a homogeneous mixture
Answer:
1. KCI is the solute in a homogeneous mixture.
Explanation:
if 6.2 mold of H2SO4 is dissolved to make 750 ml of sulfuric acid what is the molarity
Answer: The molarity of given solution is 8.26 M.
Explanation:
Given: No. of moles = 6.2 mol
Volume = 750 mL (1 mL = 0.001 L) = 0.75 L
Molarity is the number of moles of a substance present in a liter of solution.
Therefore, molarity of given solution is converted as follows.
[tex]Molarity = \frac{no. of moles}{Volume (in L)}\\= \frac{6.2 mol}{0.75 L}\\= 8.26 M[/tex]
Thus, we can conclude that the molarity of given solution is 8.26 M.
0.850 moles of N2 originally at 85°C is cooled such that it now occupies 17.55L at 1.25 atm. What is the final temperature of the gas?
The final temperature of the gas is 269.9 K, or -3.25 °C, which was calculated with the help of ideal gas equation.
What is the ideal gas equation?The ideal gas equation gives the relation between pressure, volume and temperature.
PV = nRT
where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.
To find the initial volume of the gas. We can use the fact that the number of moles of gas does not change during the cooling process:
n = 0.850 moles
We can also use the ideal gas law to find the initial volume of the gas:
PV = nRT
V = nRT/P
where R = 0.08206 L atm/K mol is the gas constant.
Convert the initial temperature from Celsius to Kelvin:
T1 = 85 °C + 273.15 = 358.15 K
Substitute the given values into the equation:
V₁ = (0.850 mol)(0.08206 L atm/K mol)(358.15 K)/(1 atm) = 24.03 L
Now we can use the combined gas law to find the final temperature:
(P₁V₁/T₁) = (P₂V₂/T₂)
Substitute the given values into the equation:
(1.25 atm)(24.03 L)/(358.15 K) = (P₂) (17.55 L)/(T2)
Solve for T₂:
T₂ = (P₂)(17.55 L)(358.15 K)/(1.25 atm)(24.03 L)
T₂ = 269.9 K
Therefore, the final temperature of the gas is 269.9 K, or -3.25 °C.
Learn more about ideal gas equation, here:
https://brainly.com/question/14826347
#SPJ3
A gas expands from a volume 2.0 L at 36oC to a volume of 2.5 L, what is the final temperature, if the pressure is constant?
Answer:
386.45 K
Explanation:
We can solve this problem by using Charles' law, which states that at constant pressure:
V₁T₂=V₂T₁Where subscript 1 stands for initial conditions of volume and temperature, while 2 stands for the final ones. Meaning that in this case:
V₁ = 2.0 LT₂ = ?V₂ = 2.5 LT₁ = 36 °C ⇒ 36 +273.16 = 309.16 KWe input the data:
2.0 L * T₂ = 2.5 L * 309.16 KAnd solve for T₂:
T₂ = 386.45 KGiven: glow is a find the indicated measure.
Answer:
is there supposed to be some type of image or ...
Explanation:
What is formed when a carboxylic acid and an amine combine? Give an example of the type of polymer that is formed by this reaction.
Answer:
The reaction between amines and carboxylic acids to form amides is biologically important. It is through this reaction that amino acids (molecules containing both amine and carboxylic acid substituents) link together in a polymer to form proteins.
is benzene saturated or unsaturated?
Answer:
Benzene shows that it is actually unsaturated because it adds hydrogen or chlorine, although only when allowed to react under very vigorous conditions (higher temperature or pressure) compared to those required for alkenes and alkynes.
Explanation:
If you have 3cm of each
substance, which would
have the MOST MASS
From the given graph, it is clear that the element with highest mass ate a volume of 3 cm³is lead and that with least mass is aluminium.
What is density?Density of a substance is the measure of its mass per unit volume. Thus, mathematically it is the ratio of mass to the volume. Therefore, as the mass increases density also increase.
Density of an element depends on its mass, volume, temperature and pressure. In periodic table, from left to right density decreases whereas down a group density increases.
From the graph showing the mass-volume-density relation it is clear that the element with with higher mass at a particular volume is lead and the element with least mass among the group is aluminium. The density of these elements also showing the same trend.
To find more on density, refer here:
https://brainly.com/question/15164682
#SPJ2