a tiny particle in the nucleus of an atom that is about the same size as a proton is a(n)
A. electron
B. neutron
C. solid
D. element
Answer:
b. neutron.
Explanation:
I hope this helps.
Answer:
B. Neutron
Explanation:
Neutrons are about the same size as protons. In addition, nuclei are made up of neutrons and protons. Electrons are located in the electron cloud, which is outside of the nucleus. Solids are hard matter, and an element is a substance that cannot be broken down any further.
Hope this helps!
An ideal gas fills a balloon at a temperature of 227ºC and standard pressure. By what factor will the volume of the balloon change if the gas in the balloon is heated to 327ºC at standard pressure? Identify which gas law applies and show your work to receive full credit. Highlight the correct answer below. (2 points)
a. 227/327
b. 5/6
c. 6/5
d. 2/1
e. 327/227
Answer:
e. 327/227
Explanation:
This is the correct standard pressure.
Two tons of water is pumped into a tank 15 ft. High in 5 minutes. Determine the power output of the pump. (Note: One ton is equal to 2,000 lb. And remember to convert the minutes to seconds.)
Answer:
200 lb•ft/s
Explanation:
From the question given above, the following data were obtained:
Force (F) = 2 tons
Time (t) = 5 mins
Height (h) = 15 ft
Power (P) =?
Next, we shall convert 2 tons to pound. This can be obtained as follow:
1 ton = 2000 lb
Therefore,
2 tons = 2 × 2000
2 tons = 4000 lb
Next, we shall convert 5 mins to seconds. This can be obtained as follow:
1 min = 60 s
Therefore,
5 mins = 5 × 60
5 mins = 300 s
Finally, we shall determine the power of the pump. This can be obtained as follow:
Force (F) = 4000 lb
Time (t) = 300 s
Height (h) = 15 ft
Power (P) =?
P = F × h / t
P = 4000 × 15 / 300
P = 60000 / 300
P = 200 lb•ft/s
Thus, the power of the pump is 200 lb•ft/s
Answer:
It's 200 ft-lb/sec
Explanation:
I did it before!
Colin decided to investigate soil erosion by water. He measured rates of erosion on
model hills made of soil, rock, and sand. Which of the following was the test
(independent) variable?
Answer:
i just had a test on this with 2 attempts and got it wrong on both but i do know that the answer is not...
the steepness of the models hillside
or
the rate of erosion on the hills
so the answer is either...
the amount of water sprayed on the hills
or
the type of material used to construct the model hills
but i think its the amount of water sprayed on the hills...i hope i helped a lil ;)
Explanation:
Which property of sulphuric acid makes it suitable to use as a catalyst for the preparation of esters?
Which diagram represents matter with a definite volume but no
definite shape?
i think it is Substance C
What element is found in water?
1. Carbohydrate
2. Carbon
3. oxygen
Explanation:
3. the element is oxygen
What can be concluded from the following statements about a property of metats? • Acast-iron skillet on a stove is used to try bacon • A metal spoon left in a pot of soup heating on a stove is too hot to touch - An aluminum playground slide gets hot on a summer day. O A Metals combine with nonmetals.O B. Metals are good insulators. O C Metals conduct electricity D Metals conduct heat.
Answer:
D - metals conduct heat
HELP!! 30 POINTS!!!! What does the energy graph look like for this reaction??
C3H8+5O2 -> 3CO2+4H2O
I have the data, I just need to know how to make the graph, please!!
total enthalpy of reactants= -103.85
total enthalpy of products= =-2147.81
=-2043.96 kJ/mol exothermic reaction
Answer:
Bottle Nose Dolphin ummmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
Explanation:
1. When _____
are added or removed from an atom, _____
is formed
Answer:
1.) protons or electrons 2.) ion
Explanation:
What causes a substance to be hydrophobic?
A 2.50 L sample of butane gas (C4H10), measured at 22.0
oC and 1.20 atm pressure, is combusted completely and
the carbon dioxide gas collected at the same pressure and
temperature. What volume of CO2 is produced?
Answer:
Same i guess hdjekfhkshfjfkr
The resultant volume of the carbon dioxide gas which is produced by the combustion of butane is 14.4L.
How do we calculate the moles of gas?Moles of any gas will be calculated by using the ideal gas equation as:
PV = nRT, where according to qustion for butane gas
P = pressure = 1.20 atm
V = volume = 2.50L
n = moles = ?
R = universal gas constant = 0.082 L.atm / K.mol
T = temperature = 22 degree celsius = 295.15 K
On putting values we get
n = (1.20)(2.50) / (0.082)(295.15) = 0.124 moles
Given chemical equation is:
C₄H₁₀ + 13/2O₂ → 4CO₂ + 5H₂O
From the stoichiometry of the reaction, it is clear that,
1 mole of C₄H₁₀ = produces 4 moles of CO₂
0.124 mole of C₄H₁₀ = produces 4×0.124=0.496 moles of CO₂
Now we calculate the volume for the carbon dioxide gas at the given pressure and temperature as:
V = (0.496)(0.082)(295.15) / (1.20) = 14.4 L
Hence required volume of CO₂ is 14.4 L.
To know more about ideal gas equation, visit the below link:
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Which body system includes the lungs?m
Answer: The respiratory system
Explanation: It includes the nose, mouth, throat, voice box, windpipe, and lungs. Air enters the respiratory system through the nose or the mouth.
what is the pH when h+=0.045 M?
Answer:
pH≈1.35
Explanation:
-log(0.045)≈1.35
You start with a container that is 8L big and the temperature in the room is 326K.
If the you take the container out in the heat at 352K, how big will it get?
Answer:
The new volume is 8.64 L.
Explanation:
Charles's Law consists of the relationship that exists between the volume and the temperature of a certain quantity of ideal gas, which is maintained at a constant pressure. For a given sum of gas at constant pressure, as the temperature increases, the volume of the gas increases and as the temperature decreases, the volume of the gas decreases.
In summary, Charles's law is a law that says that when the amount of gas and pressure are kept constant, the quotient that exists between the volume and the temperature will always have the same value:
[tex]\frac{V}{T} =k[/tex]
Being an initial state 1 that modifies its conditions until a final state 2, it is fulfilled:
[tex]\frac{V1}{T1} =\frac{V2}{T2}[/tex]
In this case:
V1= 8 LT1= 326 KV2= ?T2= 352 KReplacing:
[tex]\frac{8L}{326 K} =\frac{V2}{352 K}[/tex]
Solving:
[tex]V2=352 K*\frac{8L}{326 K}[/tex]
V2= 8.64 L
The new volume is 8.64 L.
You use a _____ when you are changing compounds
Answer:
coeffeicent!
Explanation:
this balances equations and also changes the amount of a compound/element present
. Chalk is made of CaCO 3 . How many molecules are in 5 grams of chalk?
Answer:
20.02 grams of chalk.
Explanation:
Eight ounces (1 fl. Oz = 29.57 ml) of orange juice contains 160% of the recommended daily allowance of vitamin c (rda = 75-90 mg for adults). How many milliliters of the orange juice will provide 100% of the recommended daily allowance?
El etanol combustiona con el oxigeno produciendo dióxido de carbono gaseoso y agua: En un proceso se hacen reaccionar 450.2 g de dioxígeno con 998. 2 g de etanol . a) ¿Cuál de los reactivos es el limitante? b) Calcule la masa de dióxido de carbono que se formará c) ¿ Cuanto del reactivo en exceso quedará sin reaccionar?
Answer:
uh oh stinky uh oh stinky
19) Which one of the following statements describes a chemical property of hydrogen gas?
A) Hydrogen gas has a density of 0.00009 g/cm’ at STP.
B) Hydrogen gas burns in air.
C) Hydrogen gas has a boiling point of 20. K at standard pressure.
D) Hydrogen gas is colorless.
(PHYSICAL SCIENCE) Help please !!
Covert 50oC to k
(I’ll mark you as brainlister)
Answer:
323 K
Explanation:
To convert Celcius to kelvin first you need to remember this equation:
C + 273 = K (K = kelvin and C = celsius)
Next, you substitute with what you have given:
50 + 273 = K
Solve the equation by adding 50 and 273
k = 323
in pressure dunt
uwing
frost shattering
Answer:
i dont get it???????
Explanation:
How many atoms are in 25.0 moles of calcium (Ca)?
Answer:
1.8066e+24 is the answer
helllllppppppp pleaseeeeeee
6.
Ammonia (NH3) acts as a weak base in aqueous solution. What is the acid that reacts with this base
when ammonia is dissolved in water?
(A) NHA
(B) H2O
(C) Oxygen, which is always dissolved in water
(D) None of the above, there are no acids in pure water
Answer:
90% of people marry there 7th grade love. since u have read this, u will be told good news tonight. if u don't pass this on eight comments your worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of your life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love you.!Explanation:
Ammonia acts as a weak base in aqueous solution. Water is the acid that reacts with this base when ammonia is dissolved in water.
What is a base?According to the Arrhenius concept, base is defined as a substance which yields hydroxyl ions on dissociation.These ions react with the hydrogen ions of acids to produce salt in an acid-base reaction.
Bases have a pH higher than seven as they yield hydroxyl ions on dissociation.They are soapy in touch and have a bitter taste.According to the Lowry-Bronsted concept, base is defined as a substance which accepts protons .Base react violently with acids to produce salts .Aqueous solutions of bases can be used to conduct electricity .They can also be used as indicators in acid-base titrations.
They are used in the manufacture of soaps,paper, bleaching powder.Calcium hydroxide ,a base is used to clean sulfur dioxide gas while magnesium hydroxide can be used as an antacid to cure acidity.
Learn more about base,here:
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Question 15 (3 points)
How are cations and anions related to metals and nonmetals?
Answer:
uff mere dil ma ture kali chadiya ha uff tumi apne buni ha
Answer:
Cations (positively-charged ions) and anions (negatively-charged ions) are formed when a metal loses electrons, and a nonmetal gains those electrons. ... And all of them form an anion with a single negative charge.
PLEASE HELP WITH CHEM !! Calculate the [OH-] of each of the following solutions given the [H+]. AND Classify each of the solutions in the question above as either acid, base, or neutral. AND FIND THE PH
pH, pOH, [H+], and [OH-] are all interrelated. For simplicity, we assume that we're working with aqueous solutions at 25 °C.
The following mathematical relations are relevant here:
pH = -log[H⁺]pOH = -log[OH⁻][H⁺] = 10^-pH[OH⁻] = 10^-pOHpH + pOH = 14[H⁺] × [OH⁻] = 10^-14A pH of 7 is neutral; a pH less than 7 is acidic; and a pH greater than 7 is basic.
---
We are given four solutions of varying [H⁺], and we want to find the pH and the [OH⁻]. The pH will tell us whether the solution is neutral, an acid, or a base.
Finding the [OH⁻]Using the relationship [H⁺] × [OH⁻] = 10^-14, we can calculate the [OH⁻] of each solution by dividing 10^-14 by the given [H⁺]:
[OH⁻] = 10^-14/(3.3 × 10^-5) = 3.0 × 10^-10
[OH⁻] = 10^-14/(4.0 × 10^-8) = 2.5 × 10^-7
[OH⁻] = 10^-14/(7.2 × 10^-11) = 1.4 × 10^-4
[OH⁻] = 10^-14/(8.2 × 10^-4) = 1.2 × 10^-11
Note: While not indicated here, the units for [H⁺] and [OH⁻] are moles/liter (M).
Finding the pHTo find the pH of each solution, we take the negative logarithm of the [H⁺] with base 10, i.e., pH = -log₁₀[H⁺]:
pH = -log(3.3 × 10^-5) = 4.48
pH = -log(4.0 × 10^-8) = 7.40
pH = -log(7.2 × 10^-11) = 10.14
pH = -log(8.2 × 10^-4) = 3.09
Note that, for significant figures involving logarithms, the number of decimal places should equal the number of significant figures in the argument of our logarithm (the argument is what we're taking the -log of). Since we're taking the -log of quantities given to two significant figures, our corresponding pH values are given to two decimal places.
Acid, Base, or Neutral?As mentioned above, a pH = 7 is neutral, a pH < 7 is acidic, and a pH > 7 is basic.
4.48 < 7, so the first solution is an acid.
7.40 > 7, so the second solution is a base.
10.14 > 7, so the third solution is a base.
3.09 < 7, so the fourth solution is an acid.
Which is an example of a chemical change?
A. heating a block of ice to form liquid water
B. heating a tungsten wire until it glows brightly
C. adding sugar crystals to water to form a clear, colorless liquid
D. passing an electric current through water to form hydrogen and oxygen
Answer:
D. passing an electric current through water to form hydrogen and oxygen
Explanation:
only one that's not just a physical change.
Each solute in the table is mixed in a volume of 500 mL of water. Organize the solutions from least conductive to most conductive.
A)
4,2,1,3
B)
4, 1, 2, 3
C)
2, 4, 3,1
D)
1, 3, 4,2
Answer:
b
Explanation:
Answer:
B) 4,1,2,3
Explanation:
Did it on USA Test prep. :)