Please help!!!!!!!!
Alyssa has four different subjects oil water sand and air. she would like to fill four Identical balloons with these materials until all of the balloons have the same mass. Which balloon would take up the most space
Answer:
air
Explanation:
The material that will take up the most space is air. Air and most gases have no definite volume.
They simply take up shape and volume of any medium they are introduced into.
The attribute of no fixed shape and volume sets gases apart from other matter. The air will fill the entire space of the balloon and it will have the most volume. Oil, water and sand have fixed volume that is predetermined.Answer:
Air
Explanation:
The material that will take up the most space is air. Air and most gases have no definite volume.
They simply take up shape and volume of any medium they are introduced into.
The attribute of no fixed shape and volume sets gases apart from other matter.
The air will fill the entire space of the balloon and it will have the most volume.
Oil, water and sand have fixed volume that is predetermined.
How many grams are contained in 19.7 moles of Copper (III) Hydroxide?
Answer:
1912.1893280000002 or rounded to the nearest tenth is, 1912.19
Explanation:
Stars A and B have the same absolute brightness and are the same temperature, but when you look in the sky, Star A
looks dimmer. Why is this?
Star Ais closer than Star
B
Star A is farther away than Stars
с
Stars A and B are the same distance
None of the above
Answer:
star a is farther away
Explanation:
2H2O = 2H2 +O2
If 30mL of hydrogen are produced in above reaction, how many mL of oxygen are produced? Please show work.
Answer:
15 mL of O₂.
Explanation:
The balanced equation for the reaction is given below:
2H₂O —> 2H₂ + O₂
From the balanced equation above,
2 mL of H₂O reacted to produce 2 mL of H₂ and 1 mL of O₂.
Next, we shall determine the volume of H₂O needed to produce 30 mL of H₂. This can be obtained as follow:
From the balanced equation above,
2 mL of H₂O reacted to produce 2 mL of H₂.
Therefore, 30 mL of H₂O will also react to produce 30 mL of H₂.
Thus, 30 mL of H₂O is needed for the reaction.
Finally, we shall determine the volume of O₂ produced from the reaction. This can be obtained as follow:
From the balanced equation above,
2 mL of H₂O reacted to produce 1 mL of O₂.
Therefore, 30 mL of H₂O will react to produce = (30 × 1)/2 = 30/2 = 15 mL of O₂.
Thus, 15 mL of O₂ were produced from the reaction.
c) how many atoms of O are in 45.0g of C12H22011
Answer:
6.022×1023 oxygen atoms
how do people and water affect each other?
Answer:
is this for science or another class?
Answer:
Water is peace. They include sedimentation, pollution, climate change, deforestation, landscape changes, and urban growth. ... Each type of change to a landscape will have its own specific impact, usually directly on natural ecosystems and directly or indirectly on water resources.
Explanation:
The analysis of data leads to _____.
A. theories
B. variables
C. hypotheses
D. conclusions
Answer: D, Conclusions
Explanation: Gradpoint
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Answer:
Barb tested the streak and luster.
Explanation:
Pls mark brainliest
Answer:
Mineral size and luster.
Explanation:
Select all of the ways collection areas use to gain water. precipitation falls direction into the collection area runoff from precipitation water evaporates from the collection area
"Precipitation falls direction into the collection area" and "runoff from precipitation" are the correct ways.
Ways of collecting waterThe ways such as "Precipitation falls direction into the collection area" and "runoff from precipitation" through which collection areas use to gain water because these two activities bring water to the collection areas
While on the other hand, "water evaporates from the collection area" is the activity which removes water from the collection area so we can conclude that "Precipitation falls direction into the collection area" and "runoff from precipitation" are the correct ways.
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Balance the equation N2 +H20= NH3 + NO
Answer:
N₂ + 3H₂O → 2NH₃ + 3NO
Explanation:
The reaction expression is given as:
N₂ + H₂O → NH₃ + NO
We are to balance this reaction expression.
To do this, assign a,b,c and d as the coefficients that will balance the expression:
aN₂ + bH₂O → cNH₃ + dNO
Conserving N: 2a = c
H: 2b = 3c
O: b = d
let a = 1, c = 2, b = 3 and d = 3
So;
N₂ + 3H₂O → 2NH₃ + 3NO
What can break light apart
Given the Punnett Square above, with Y=dominant yellow allele and y= recessive green allele, what is the probability of an offspring plant having a green phenotype?
Question 5 options:
25% green phenotype
50% green phenotype
75% green phenotype
100% green phenotype
Answer:
50 percent
Explanation:
Considering one heterozygous parent and a homo-zygous recessive parent, the probability of an offspring plant having a green (recessive) phenotype is 50 percent (50%).
What is a Punnett square?A Punnet square is a diagram used to represent the gametic combination that will give rise to a given genotype/phenotype.
In this case, one parent is heterozygous (genotype Yy, carrier of the recessive allele), whereas the other parent is recessive homo-zygous (genotype yy).Here, the Punnett square is equal to:Y y
y 1/4 Yy 1/4 yy
y 1/4 Yy 1/4 yy
In conclusion, considering one heterozygous parent and a homo-zygous recessive parent, the probability of an offspring plant having a green (recessive) phenotype is 50 percent (50%).
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How many grams are in 2.2 moles of sodium hydroxide (NaOH)?
Answer:
1 mole is equal to 1 moles NaOH, or 39.99711 grams.
(( hoped this helped ))
Answer:
1 mole is equal to 1 moles Sodium Hydroxide, or 39.99711 grams. Note that rounding errors may occur, so always check the results.
How many grams of aluminum in required to produce 17.5 g of hydrogen
Mass of Aluminum = 157.5 g
Further explanationGiven
17.5 g of Hydrogen
Required
Mass of Aluminum
Solution
Reaction
2Al + 3H₂SO₄ → Al₂(SO₄)₃ + 3H₂
mol Hydrogen :
= mass : molar mass
= 17.5 g : 2 g/mol
= 8.75
From the equation, mol Al :
= 2/3 x mol H₂
= 2/3 x 8.75
= 5.83
Mass Al :
= 5.83 x 27 g/mol
= 157.5 g
How many moles are in 4.85 x 10^25 atoms of carbon?
Answer:
4.85 x 10^25
Explanation:
thats what i was told by a calculator
Diagram electron configuration of hydrogen (1), sodium (11), K (19) what do they have in common?
They can only hold 2 electrons in the first outershell
Prepare 800 mL of 2M sodium chloride. How many grams of NaCl needs to be dissolve in a 800 mL distilled water?
Answer:
93.6 g of NaCl.
Explanation:
We'll begin by converting 800 mL to litre (L). This can be obtained as follow:
1000 mL = 1 L
Therefore,
800 mL = 800 mL × 1 L / 1000 mL
800 mL = 0.8 L
Next, we shall determine the number of mole of NaCl in the solution. This can be obtained as follow:
Molarity = 2 M
Volume = 0.8 L
Mole of NaCl =?
Molarity = mole / Volume
2 = mole of NaCl / 0.8
Cross multiply
Mole of NaCl = 2 × 0.8
Mole of NaCl = 1.6 moles
Finally, we shall determine the mass of NaCl needed to prepare the solution. This can be obtained as follow:
Mole of NaCl = 1.6 moles
Molar mass of NaCl = 23 + 35.5
= 58.5 g/mol
Mass of NaCl =?
Mole = mass /Molar mass
1.6 = Mass of NaCl / 58.5
Cross multiply
Mass of NaCl = 1.6 × 58.5
Mass of NaCl = 93.6 g
Therefore, 93.6 g of NaCl is needed.
93,6 grams of NaCl is needed to prepare a 800ml of 2M sodium chloride.
Molar concentrationIn a 2M solution, there are 2 moles of the substance per 1 liter, that is, in 800 ml we have:
[tex]\frac{2 mol}{x mol} =\frac{1000 ml}{800ml}[/tex]
[tex]x = 1.6 mol[/tex]
Thus, 1.6 mol of NaCl is needed to prepare the solution.
Mass calculationTo calculate the mass in an amount of moles, we use the molar mass, so that:
[tex]MM_{NaCl}= 58.5g/mol[/tex]
[tex]m = MM \times mol[/tex]
[tex]m = 58.5 \times 1.6[/tex]
[tex]m = 93.6g[/tex]
So, 93,6 grams of NaCl is needed to prepare a 800ml of 2M sodium chloride.
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Which of the following correctly describes molecules of two different gases if they are at the same temperature and pressure?
CA. They must have the same mass.
CB. They must have the same velocity
CC. They must have the same average kinetic energy
CD. They must have the same average potential energy
Answer: C. They must have the same average kinetic energy.
Explanation: I got it right
convert 2.39 x 1022 molecules of water into moles of water
Answer:
[tex]0.0397\ \text{mol}[/tex]
Explanation:
Number of molecules of water = [tex]2.39\times 10^{22}[/tex]
[tex]N_A[/tex] = Avogadro's number = [tex]6.022\times 10^{23}\ \text{mol}^{-1}[/tex]
Number of moles is given by
[tex]\dfrac{2.39\times 10^{22}}{6.022\times 10^{23}}[/tex]
[tex]=0.0397\ \text{mol}[/tex]
The number of moles of water is [tex]0.0397\ \text{mol}[/tex].
What is the mass of reactants in the following equation? N2 + 3H2 ----> 2NH3 Question 3 options: 34.05 amu 31.03 amu 30.02 amu 15.01 amu
Answer:
34.06amu
Explanation:
The reaction expression is given as:
N₂ + 3H₂ → 2NH₃
We are to find the mass of reactants in the equation given;
Here:
Mass of reactants = 2(atomic mass of N) + 3[ 2 x atomic mass of H]
Atomic mass of N = 14.0067amu
Atomic mass of H = 1.008amu
Mass of reactants = 2(14.0067) + 3(2 x 1.008) = 34.06amu
Water in the atmosphers is in its gas form and is called water vapor. Where does most of the water vapor in the atmosphere
evaporate from?
Answer:
Water vapor can be produced from the evaporation or boiling of liquid water or from the sublimation of ice. Water vapor is transparent, like most constituents of the atmosphere. Under typical atmospheric conditions, water vapor is continuously generated by evaporation and removed by condensation.
Perform the following conversions. Show your work and give answer in scientific
notation with correct units.
4.390 m → dm
4.39 x 10^1 dm
we need to change the m to dm first then make it in scientifiv notation
Why water is able to stick to the side of a glass
Answer:
Water uses adhesive forces that allow it to stick to certain surfaces such as glass.
Explanation:
When the angle between vertical direction and the glass wall is small, surface tension is stronger and the component of gravity perpendicular to the glass wall is small. The result of this causes water to stick to the side of a glass.
Hope this helps!
starting with the idea of isostasy and ending with plate tectonics, explain how scientists understanding of the earth's crust has changed
Plate Tectonics is the study of the movement and changes in the rocks that make up the earth's crust. Isostasy is the equilibrium in the earth's crust maintained by a flow of rock material in the asthenosphere.
The concept behind pre-continental drift was that in addition to the pressure of contraction, isostatic adjustments also caused the crust's heavier portions to sink and its lighter portions to rise. It was believed that the Earth's interior was a viscous fluid that could support this rising and sinking.Wegener put up the theory that continents can move in 1915 based on fossil data, how coasts appeared to fit together, and other traits, but it was not well received at the time.He noticed that rock ages, and mountain belts match up across the boundaries of continents if you put the continents back together as the "jigsaw puzzle fit" proposes.On continents that are currently divided by water, fossils of identical terrestrial flora and animals have been discovered.New data from the ocean floor, including topography and rock magnetism, played a major role in the development of plate tectonic theory in the 1960s.On the basis of symmetrical patterns, seafloor spreading was hypothesized as a mechanism to propel the migration of the continents.Hence this led to scientists understanding of the earth's crust has changed.
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What are zebra mussels?
Answer:
The zebra mussel is a small freshwater mussel.
The speed of light in a vacuum is 2.998 x 108 m/s. How long does it take for light to circumnavigate the Earth, which has a circumference of around 24,900 miles? Do not enter "seconds" as part of your answer. Watch your Sig Figs!
Answer:
0.13 s
Explanation:
We'll begin by converting 24900 mile to metres (m). This can be obtained as follow:
1 mile = 1609.344 m
Therefore,
24900 mile = 24900 mile × 1609.344 m / 1 mile
24900 mile = 4.01×10⁷ m
Finally, we shall determine the time taken for light to circumnavigate the Earth, this can be obtained as follow:
Distance = 4.01×10⁷ m
Speed = 2.998×10⁸ m/s
Time =?
Speed = distance / time
2.998×10⁸ = 4.01×10⁷ / time
Cross multiply
2.998×10⁸ × time = 4.01×10⁷
Divide both side by 2.998×10⁸
Time = 4.01×10⁷ / 2.998×10⁸
Time = 0.13 s
Thus, it will take 0.13 s for light to circumnavigate the Earth.
Students want to replace the material that connects the battery and the bulb in the circuit. Which material would be the best choice?
A Copper, because it is a conductor
B String, because it is flexible.
C Plastic, because it is an insulator.
D Glass, because light energy can move through it.
Answer:
a is ok
Explanation:
if they had gold it would be better but no
What is the density of a rock that has a mass of 35 grams and a volume of 7.0 g/mL
Answer: 5
Explanation: Density equals mass divided by volume (D=M/V). Thus, 35/7=5.
The density of a rock : ρ = 5 g/cm³
Further explanationGiven
mass = 35 g
volume = 7 cm³
Required
The density
Solution
Density is a quantity derived from the mass and volume
Density is the ratio of mass per unit volume
Density formula:
[tex]\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}[/tex]
ρ = density
m = mass
v = volume
Input the value :
ρ = 35 g : 7 cm³
ρ = 5 g/cm³
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Answer:
The answer is number 2.
Explanation:
How many moles are there in 36.0 grams of water?
Answer:
There are 4 moles of hydrogen atoms in 36 grams of water,
Explanation: