Answers
helium
Explanation:
because it has the mass number of 4
Related Questions
A mixture of propane and butane is burned with pure oxygen. The combustion products contain 46.7 mole% H2O. After all the water is removed from the products, the residual gas contains 69.0 mole% CO2 and the balance O2 a. What is the mole percent of propane in the fuel?
Answers
Answer:
28%
Explanation:
Basically, all o did was write the equations, balance it and solve for them. Also, at the place I stared, I used simultaneous equation to solve it. Multiplying by 8 and also 3.
It's a pretty straightforward question.
At the final step that's missing, I Did
(y)C3H8 = 2.8 / ( 2.8 + 7.1)
(y)C3H8 = 0.28
Soil horizons develop as a result of
Answers
Answer:
WVCA - Soil Formation and Soil Horizons. Soils develop as a result of the interactions of climate, living organisms, and landscape position as they influence parent material decomposition over time.
Explanation:
The function of hair is to:
a. protect skin from ultraviolet light
b. regulate temperature
C. help keep particles out of eyes and nose
d. all of the above
Answers
Answer:
D I think. I'm not sure. I think it's all of them
If the compound below is oxidized, the resulting product is ___. Select one: a. methane and propane b. butanal c. butanoic acid d. butane
Answers
The complete question is
If the compound below is oxidized, the resulting product is ___.
the compound given is Butanal
Select one:
a. methane and propane
b. butanal
c. butanoic acid
d. butane
Answer:
C. Butanoic Acid
Explanation:
When Butanal is oxidized using reagents like KMnO4, Tollens reagent etc.
When Aldehyde is oxidized corresponding Carboxylic Acid is produced
Butanal → Butanoic Acid
The compound lead(II) acetate is a strong electrolyte. Write the reaction when solid lead(II) acetate is put into water:
Answers
Answer:
Pb(CH3COO)2(s) -------> Pb^2+(aq) + 2CH3COO^- (aq)
Explanation:
Recall that a strong electrolyte is an electrolyte that dissociates completely in solution. Hence, if we say that lead(II) acetate is a strong electrolyte we are actually saying that lead(II) acetate ,dissociates completely in solution to yield lead II ions and acetate ions.
This implies that the reaction equation shown in the answer section tends to go to completion since lead(II) acetate is a strong electrolyte.
3. How has the HST managed to withstand harsh space conditions and operate for
long period of time?
Answers
Answer:Replacing Hubble's Main Computer NASA performed a battery of mechanical, electrical, radiation and thermal tests to guarantee that the computer would survive the trip to orbit, withstand bombardment by cosmic and solar radiation and work flawlessly in the extreme temperatures of space for the rest of Hubble's life.
Explanation:
Why do we need to identify matter?
Answers
Answer:
It's important for scientists to know the properties of matter because all things are made up of matter. Each type of matter has different physical characteristics and scientists need to know and understand these characteristics to make calculations. ... The main phases of matter are solid, liquid, and gas
Explanation:
^^
What is the pH after two solutions are mixed: 1. A 0.155 M H2SO4 solution with a volume of 35.0 mL and 2. A 0.225 M solution of KOH with a volume of 35.0 mL. The volumes are additive.
Answers
Answer:
[tex]pH=1.67[/tex]
Explanation:
Hello.
In this case, since the reaction between the sulfuric acid and the potassium hydroxide is:
[tex]2KOH+H_2SO_4\rightarrow K_2SO_4+2H_2O[/tex]
We can see a 2:1 mole ratio between them, thus, we compute the moles of acid and base that are present in the solution by using the employed volume and its concentration:
[tex]n_{H_2SO_4}=0.155mol/L*0.0350L=0.005425molH_2SO_4\\\\n_{KOH}=0.225mol/L*0.0350L=0.007875molKOH\\[/tex]
Next, we use the 2:1 mole ratio to compute the consumed moles of acid:
[tex]n_{H_2SO_4}^{consumed}=0.007875molKOH*\frac{1molH_2SO_4}{2molKOH}=0.0039375molH_2SO_4[/tex]
It means that the leftover of sulfuric acid is:
[tex]n_{H_2SO_4}^{leftover}=0.005425-0.0039375=0.001488molH_2SO_4[/tex]
Therefore, since sulfuric acid is a strong acid, the pH is defined in terms of its concentration which is actually equal to the concentration of hydrogen ions in solution, which is computed considering the total additive volume:
[tex][H^+]=[H_2SO_4]=\frac{0.001488mol}{0.070L}=0.02125M[/tex]
So the pH turns out:
[tex]pH=-log(0.02125)\\\\pH=1.67[/tex]
Best regards.
What does “circulate” mean in this passage?
Sentence : “When certain mosquitoes bite someone, marlaria enters that persons blood, allowing the disease to circulate.”
Answers
Answer:
Below
Explanation:
Move or cause to move continuously or freely through the blood.
Which of the following is NOT a
homogenous mixture?
Answers
Answer:blacks screen. No answers to choose from. Thanks for the points:))
Explanation:
True or false, physical properties are distinguished by the way something looks, taste, smell, and feels.
Answers
Answer:
True
Explanation:
Physical properties are based on all of our five senses, so yeah
According to the nissani what can be some possible ways to save the forest of third world countries
Answers
Answer:
This question is incomplete
Explanation:
This question is incomplete. However, there are ways to save the forest of third world countries - this includes
1) Creating of forest reserves: Wide areas of land that are still forested can still be preserved and converted to forest reserves which can prevent these areas from being deforested as a result of human activities or industrialization.
2) Government policies: Government can put policies in place to prevent people from embarking on deforestation of certain lands. This is because some parts of the third world countries still rely on wood for cooking and other sources of daily activities.
3) Replanting of deforested areas: Replanting of trees can also help third world countries in saving the forest.
- What part of the ocean absorbs a large amount of solar energy?
Answers
Answer:
artic ocean
Explanation:
An element that has an electronegativity value of zero
Answers
Answer:
Noble gases
Explanation:
Noble gases
lab
table b:eyedrop of blue water in cold water
table c:eyedrop of red water in hot water
table d:see how temperature changes on white + black paper with light shining on them
plz help
brainliest for 1st correct answer
Answers
Answer:
lol, I just did this assignment, cold water
0:30: slowly expand
1:00: still expanding
1:30: expanding is continued
2:00: still expanding slowly
2:30: expanding slowly
3:00: expanded twice the size from the first time
hot water
0:30: expanding quickly
1:00: still expanding
1:30: starts to reach the surface and still expanding
2:00: almost all the of the dye reached the top
2:30: the dye reached the top and is starting to split
3:00: the dye split appart and is moving down again
radiation
white paper
0:30: at a low temp. at around 3.3 C
1:00: still at a low temp. around 4.4 C
1:30: slowly rising temp. around 5.5 C
2:00: still slowly rising temp. around 7.2 C
2:30: still at a low temp. around 8.3 C
3:00: ends at a low temp. around 10 C
black paper
0:30: at a resonable temp. at around 6.6 C
1:00: temp. rises quicker at around 13.3 C
1:30: temp. stil rising quickly at around 17.7 C
2:00: temp. is getting hotter at around 21.6 C
2:30: temp. is still getting hotter at around 26.1 C
3:00: temp. ends at a hot temp. at around 30 C
Explanation:
How many electrons (total number) are in the ion, CO3(2-) ?
Select one:
a.30
b. 24
c. 32
d. 16
Answers
a radioactive substance decays to 1/3 of its original amount in 10 hours. Find the half life of the substance g
Answers
Answer:
Explanation:
[tex]N=N_0(\frac{1}{2} )^\frac{t}{T}[/tex] , T is half life , t is time taken to reduce N₀ to N .
1/3 = [tex](\frac{1}{2})^\frac{10}{T}[/tex]
taking log on both sides
-log3 = 10/Tx log.5
T = 10 x log .5 / - log 3
= 10 x -.3010 / - .4771
= 6.31 hours .
C. If an electron is added to the outer shell, how will this affect the charge and volume of the atom?
if an electron is added on the outer shell
Answers
Answer:
An atom that gains or loses an electron becomes an ion. If it gains a negative electron, it becomes a negative ion. If it loses an electron it becomes a positive ion.
Answer:
when an atom gains an electron, it gains a negative charge . it's volume increases as well due to the increase in repulsion between the electrons
If 342.2 grams of C12H22O11 (sucrose) is dissolved in 1.0 L of solution. What is the molar concentration of the solution? Report your answer with the correct number of significant figures.
Answers
Answer:
M = 1 M
Explanation:
Given data:
Mass in gram = 342.2 g
Volume of solution = 1.0 L
Molar concentration = ?
Solution:
Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.
Formula:
Molarity = number of moles of solute / L of solution
Number of moles of sucrose:
Number of moles = mass/molar mass
Number of moles = 342.2 g/ 342.2 g/mol
Number of moles = 1 mol
Molarity:
M = 1 mol / 1.0 L
M = 1 mol/L
M = 1 M
The molar concentration of the solution is :
- M = 1 M
Check below to see the full solution.
Molar ConcentrationMolarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.
What information do we have?
Mass in gram = 342.2 g
Volume of solution = 1.0 L
Molar concentration = ?
Number of moles of sucrose:
Number of moles = mass/molar mass
Number of moles = 342.2 g/ 342.2 g/mol
Number of moles = 1 mol
Molarity:
Molarity = number of moles of solute / L of solution
M = 1 mol / 1.0 L
M = 1 mol/L
M = 1 M
Learn more about "Molarity":
https://brainly.com/question/15450572?referrer=searchResults
what is the form of light
Answers
Answer:
most likely Energy that's what I'm thinking
As you move from earth's inner core through the mantle to the crust, how would
temperature, pressure and density of the surrounding rock change?
The temperature would decrease, but pressure and density would increase.
They would all decrease.
O They would stay the same.
O They would all increase.
Answers
Answer:
all decrease
Explanation:
Would you expect Nio to dissolve in an aqueous solution of NaNO3?
Answers
Answer:
NiO Does Not Dissolve In An Aqueous Solution Of NaNO3.
Explanation:
At his favorite restaurant, Dylan orders a soda with his dinner. The ice in his drink has a mass of 6 g and a volume of 20 cm3. What is the density of the ice? Explain the steps you took to solve this problem, showing your work.
Answers
Based on the synthesis reaction, what would the product of the reaction be? NaPO3 + CuO → ? NaO + CuPO3 Na + P + Cu + O4 NaCuPO4 NaCu + PO4
Answers
Answer:
C
Explanation:
Based on the synthesis reaction,the product of the given chemical equation is NaCuPO4 .
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
Learn more about chemical equation,here:
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Complete the sentence by using "Direct", "Inverse", or equal. The pressure and volume of a gas change in opposite directions. This can be described as an " upside-down" relationship. We can also say that the relationship between the pressure and volume of a gas is a __________________ relationship
Answers
answer:
i believe the answer is inverse.
if i'm wrong sorry :(
if i'm right your welcome :)
1. The
in an atom of that element.
number of an element equals the number of protons
2. The exact position of the electrons of an atom cannot be determined because they are
in constant
to the nucleus of an atom have the least
3. The electrons
amount of energy
4. The number of
bonds that atom can form.
in an atom tells you how many chemical
Answers
Answer:
1. Proton = electron if the element is not in an ionic state
proton = atomic number
The Law of Superposition is most relevant when studying which type of rock?
A.
metamorphic
B.
granite
C.
sedimentary
D.
igneous
Answers
Answer:
Sedimentary
Explanation:
Sedimentary rock is formed when pieces of eroded earth are deposited in layers. These layers are piled upon one another, slowly pressed down into the earth, and pressurized to become rock. The Law of Superposition states that, of these layers, the younger are found on top of the older.
The Law of Superposition is most relevant when studying this type of rock: C. sedimentary.
A sedimentary rock can be defined as a rock that is typically formed as a result of the accumulation, lithification or deposition of sediments (minerals or organic particles) at or near Earth's surface.
According to Nicolas Steno, the four (4) laws of stratigraphy include the following:
Law of original horizontality.Law of cross-cutting relationships.Law of lateral continuity.Law of superposition.Steno's Law of Superposition states that within a sequence of rock layers (rock strata) in sedimentary rocks, the oldest (first) strata lies at the base (bottom) of the sequence while younger (newer) strata sit atop the older strata.
Hence, the sequence of rock layers (rock strata) in sedimentary rocks typically marks the time of deposition of each of the rock layers according to Steno's Law of Superposition.
Read more: https://brainly.com/question/20901220
Which particles are equal in number for an atom with a neutral charge?
Answers
It get hotter towards the center
Answers
Answer:
earth
Explanation: