Answer:
a compass rose
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
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
20 POINTS! SAVE ME PLS!
Which ion below is fluorine most like to form? A) F+1 B) F+2 C) F-1 D) F-2
c) how many atoms of O are in 45.0g of C12H22011
Answer:
6.022×1023 oxygen atoms
The analysis of data leads to _____.
A. theories
B. variables
C. hypotheses
D. conclusions
Answer: D, Conclusions
Explanation: Gradpoint
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.
How many grams in 65 moles of NaCl?
Answer:0.899076923
Explanation:
Na = 22.99
Cl =35.45
Add them together u get the molar mass of NaCl =58.44
Divide 58.44 by 65
U get 0.899076923
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 moles are there in 36.0 grams of water?
Answer:
There are 4 moles of hydrogen atoms in 36 grams of water,
Explanation:
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].
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:
5. As a sample of matter is heated, its particles *
O A are unaffected
O B. move more quickly
O C. move more slowly
D. stop moving
Answer:
B. move more quickly
Explanation:
As a sample of matter is heated, we know that the particles begins to move more quickly.
This is because the temperature of a substance is directly proportional to the average kinetic energy of a system.
As the temperature increases, the body gains more kinetic energyThis is translated to the particles of the medium. Then they begin to move quickly and very fast enough.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.
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.
learn more about Plate tectonics here: https://brainly.com/question/2325633
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What must be satisfied for a hypothesis to be useful?
A. It must be theoretical.
B. It must be observable.
C. It must be based on scientific law.
D. It must be testable.
helppp nowwww plsss
Answer:
Barb tested the streak and luster.
Explanation:
Pls mark brainliest
Answer:
Mineral size and luster.
Explanation:
What are zebra mussels?
Answer:
The zebra mussel is a small freshwater mussel.
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
helppp nowwww plsss
Answer:
The answer is number 2.
Explanation:
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%).
Learn more in:
https://brainly.com/question/3522181
Which organelle packages materials and distributes them throughout the cell?
lysosome
chloroplast
Golgi body
cell membrane
Pleaseee!!
Answer:
golgi body
Explanation:
trust meeeeeeeeeWhich compound is formed from its elements by an
exothermic reaction at 298 K and 101.3 kPa?
Answer:
H2O(g) (negative)
Explanation:
Pls help me I beg you
Answer:
Es la c
Explanation:
Espero que te ayude
Answer:
D. Nathan applies enough force through pushes to move the piano
Explanation:
What moves the piano is a net force that is applied through the effort of Nathan on the instrument.
Force is a pull or push on a body.
When force is applied on a body, it causes the state of motion of the body to change.
Therefore, if a body has a net force greater than zero, the body will in likewise begin to move. As Nathan pushes on the piano, it will eventually move.
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
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:
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
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.
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 liters are in 3.45 moles of oxygen gas at STP?
A) 2.08 x 10 24 L
B) 110.4 L
C) 77.28 L
D) .15 L
Answer:
22.4L of one mole of any gas
or you can use PV=nRT
3.45*22.4=77.28
Explanation:
4. How many Carbon atoms are present in 1.00 mole of methane, CH,?
6.02 x 1025
o
3.01 x 1023
0
6.02 x 1023
o
O
12.04 x 1023
0
Answer: 6.02*10^23
Explanation:
1 mole of anything is 6.02*10^23
1 atom C per CH4