Answer:
collect more sunlight
Answer:
to collect more sunlight
Explanation:
I
go to CALIFORNIA VIRTUAL ACADEMY ONLINE SCHOOL WITH K12
Which sample of matter can be separated into different substances by physical means
Answer:
a heterogeneous mixture
Explanation:
an example would be sand and water because it can be filtered which is a physical mean of separation.
Answer:
Heterogeneous mixtures
Explanation:
It is composed of two or more types of matter that can be present in varying amounts and can be separated by physical means. Heterogeneous mixtures vary in composition from point to point; homogeneous mixtures have the same composition from point to point.
Unit for mass, volume and density
Answer:
kg, m^3, kg/m^3
Explanation:
the SI units for these are:
mass: kilogram
volume: cubic meter
density: kilogram per cubic meter
The appearance of the surface of a mineral when it reflects light is known as
Answer:
Explanation:
The appearance of the surface of a mineral when it reflects light is known as
write formulas: a) 3 nitrogen atoms, b) 2 phosphorus molecules // help please with these
Explanation:
a)3 N
b)2 P4
hope it will help u
Which is the correct order of scientists?
Group of answer choices
Bohr, Dalton, Rutherford, Thomson
Rutherford, Thomson, Dalton, Bohr
Dalton, Thomson, Rutherford, Bohr
Thomson, Dalton, Rutherford, Bohr
What do you think makes an atom “neutral or ion”?
Plz help, i will give five stars and brainliest!
Answer: neutral
Explanation: An atom is made up of three major sub-atomic particles namely protons, electrons and neutrons. The electrons form a cloud around the nucleus and are bound to the nucleus by electromagnetic forces.
A 13.58 g sample of a compound contains 8.67 g of iron, Fe, 1.60 g of phosphorus, P, and oxygen, O. Calculate the empirical
formula for the compound.
Answer:
[tex]Fe_3PO_4[/tex]
Explanation:
To do this, we find the moles of each element. We get around 0.155 moles of Fe, 0.051 moles of P, and 0.206 moles of O. We then divide each one by the smallest one (which is 0.051 moles of P). We then get 3 for Fe, 1 for P, and 4 for O. This correlates to the empirical formula of the compound.
The empirical formula for the compound is [tex]Fe_3PO_4[/tex] if a 13.58 g sample of a compound contains 8.67 g of iron, Fe, 1.60 g of phosphorus, P, and oxygen, O.
What is the empirical formula?
An empirical formula tells us the relative ratios of different atoms in a compound.
We need to calculate the number of moles:
Given data:
Mass of iron - 8.67 g
Mass of phosphorus -1.60 g
Mass of oxygen -3.31 g
Moles of iron - [tex]\frac{mass}{molar \;mass}[/tex]
Moles of iron - [tex]\frac{8.67 g}{56 g/mol}[/tex]
0.15 mole
Moles of phosphorus [tex]-\frac{mass}{molar \;mass}[/tex]
Moles of phosphorus - [tex]\frac{1.60 g}{31 g/mol}[/tex]
0.051 moles
Moles of oxygen -[tex]\frac{mass}{molar \;mass}[/tex]
Moles of oxygen - [tex]\frac{3.31 g}{16 g/mol}[/tex]
0.20 moles
Dividing each mole using the smallest number that is divided by 0.051 moles.
Fe:P:O :: 3:1:4
The empirical formula for the compound is [tex]Fe_3PO_4[/tex].
Learn more about empirical formula here:
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How many moles of sucrose are dissolved in 500 ml of a 1.5 M sucrose solution?
A. 0.75 moles
B. 750 moles
C. 0.003 moles
D. 333 moles
CALCULATE SCIENTIFIC NOTATION (Add and Subtract)
1) 9 × 103 + 2.3 × 104
2) 15 × 102 + 5.2 × 105
3) 10 × 104 + 2.8 × 106
4) 7.0 × 103 + 8.6 × 104
5) 3.0 × 104 + 14.5 × 105
6) 8 x 104 – 2.7 x 102
7) 5.0 x 103 – 8.9 x 104
8) 7.0 x 103 – 8.20 x 102
Answer:
1. 1166.2
2. 2076
3. 1336. 8
4. 733.04
5. 1834.5
6. 556.6
7. - 410.6
8. 836.4
Explanation:
1.9 x 103 =928
How is color a physical change
Answer:Physical changes involve states of matter and energy. No new substance is created during a physical change, although the matter takes a different form. The size, shape, and color of matter may change. Physical changes occur when substances are mixed but don't chemically react.
Explanation:
Which of the following describes a nonmetal
A:brittle shiny and solid at room temperature
B:brittle dull and low density
C:malleable shiny and able to conduct electricity
D:malleable dull and solid liquid or gas at room temperature
Answer:
b is the answer
Explanation:
non metals are not shiny, brittle, unmalleable, and are poor conductors of thermal energy and electrical current.
A nonmetal is brittle, dull, and low in density.
• Non-metals refer to the elements that produce negative ions by gaining or accepting electrons. The non-metals generally possess 4, 5, 6, or 7 electrons in their valence shell. The non-metals are those, which are devoid of all the metallic properties.
• The non-metals in their solids-state are brittle, thus, they lack ductility and malleability exhibited by the metals.
• The non-metals are not shiny like metals, they are dull in color.
• The non-metals seem to possess low density, primarily as non-metals seem to prevail either in a liquid or solid-state. The non-metals lack the dense and closed packing in the lattice, which is seen in metals.
Thus, non-metals are brittle, dull, and low in density.
To know more about:
https://brainly.com/question/17811524
Which of the following excited state electron configurations of C would require the longest wavelength of light to produce?
Question 23 options:
1s22s22p13s1
1s22s22p2
1s22s22p24s1
1s22s22p13p1
Answer:
Explanation:
Well ik its not math for this but for the first one if u add
22+22+13+1 u get 58
then second one 1+22+22+2=47
1+22+22+24+1=70
1+22+22+13+1=59
U notice how that most or some are all going up to 50 except the third one
So that means its 1s22s22p24s1
The longest wavelength is required for the excited state, 1s22s22p13s1.
According to the Bohr model, an atom absorbs energy and moves from a lower energy level to a higher energy level. Also energy is emitted when an electron moves from a higher to a lower energy level.
The lowest energy state of an atom is called the ground state. The excited state is a higher energy level. The smaller the energy difference between the energy levels, the longer the wavelength required for the transition.
Hence, the longest wavelength is required for the excited state, 1s22s22p13s1.
Learn more: https://brainly.com/question/4048378
Which statement about Earth's core helps explain Earth's magnetic field?
-Earth's core is composed of magnets.
-Earth's core is composed of iron and nickel.
-The outer core is solid,
-The inner core is liquid and moving
Answer:
it should be B. earths core is composed of iron and nickel, if not let me know.
Answer: B. Earth's core is composed of iron and nickel.
Explanation: The inner core is solid so C and D are incorrect and A is incorrect because the core isn't made of magnets so it has to be B.
Explain why according to the kinetic theory of matter there is a problem with the Celsius scale for temperature.
Answer:
The Celsius scale is currently defined by two different temperatures: absolute zero and the triple point of Vienna Standard Mean Ocean Water (VSMOW; specially purified water). Based on this, the relationship between Celsius and Kelvin is as follows: TCelsius=TKelvin−273.15 T Celsius = T Kelvin − 273.15 .
Aluminum metal reacts with chlorine gas to form aluminum chloride. The reaction can be represented by the following balanced chemical equation:
2 Al(s) + 3 Cl2(g) → 2 AlCl3(s).
If you were trying to react 52.9 grams of chlorine gas completely, how many grams of aluminum would you need?
_____________________ [grams of Aluminum] Do NOT enter the unit in your answer. Report your answer with 3 SFs.
Given to us is the Reaction of Aluminium metal with Chlorine gas . That is ,
[tex]\boxed{\red{\bf \underset{\blue{Aluminium}}{2Al(s)}+\underset{\blue{Chlorine}}{3Cl_2(g)}\longrightarrow \underset{\blue{Aluminium\: chloride}}{2AlCl_3}}}[/tex]
Now Mass of 1 mole aluminium = 27g . So mass of 2 moles of it would be 27×2 g = 54g .
Also , Mass of 1 mole of chlorine gas = 35.5 g . So mass of 2 Atoms will be 71g . And mass of 3 moles of atom will be 71 × 3g = 213g .
Now , use unitary method ;
213 g of Chlorine reacts with 54g of Aluminium.
1 g of Chlorine will react with [tex]\sf\dfrac{54g}{213g}[/tex] of Aluminium.
Hence 52.9 g of Chlorine will react with [tex]\sf \dfrac{54}{213}\times52.9g[/tex]=[tex]\bf 13.41g[/tex] of Aluminium.
How many different types of elements are there in acetone C3H6O?
Answer:
3
Explanation:
Answer:
10
Explanation:
What type of energy transfer is taking place when someone plays a violin?
A. Potential energy to kinetic energy
B. Elastic energy to electromagnetic energy
C. Kinetic energy to sound energy
D. Sound energy to heat energy
Answer:
C.
Explanation:
The movement of the bow is Kinetic Energy.
Answer: C. Kinetic energy to sound energy
Explanation: The vibration of the string is kinetic energy that transforms into sound energy.
How many C atoms are there in a sample of C,H, that contains 6.59 x 1026 H atoms?
A. 1.98 x 1027 C atoms
B. 2.47 x 1026 C atoms
C. 4.94 x 1026 C atoms
D. 3.17 x 1024 C atoms
Answer:
bill gates
Explanation:
If a liquid has a pH of 7 it is what?
Answer:
Neutral
Explanation:
A pH of 7 is neutral. A pH less than 7 is acidic. A pH greater than 7 is basic. The pH scale is logarithmic and as a result, each whole pH value below 7 is ten times more acidic than the next higher value.
Answer:
I believe it is neutral.
Explanation:
Since higher than 7 pH is alkaline, and lower than 7 pH is acidic.
The density of a gas is 0.88 g/mL. What is the mass of 500.0 mL of this gas?
Answer:
The answer is 440 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
volume of gas = 500 mL
density = 0.88 g/mL
We have
mass = 0.88 × 500
We have the final answer as
440 gHope this helps you
Why is Cobalt (Co) placed before Nickel (Ni) on the Periodic Table of the Elements even though it has a higher average atomic mass than nickel?
Nickel has fewer electrons.
Cobalt has a lower density.
Cobalt was discovered first.
Nickel has one more proton.
Answer: Nickel has one more proton.
Explanation:
The Periodic table orders elements based on their atomic number not by their atomic mass even though this order usually coincides with the atomic masses of the elements. Occasionally however, this is not the case as is proven by Cobalt and Nickel.
The atomic number of an element refers to the number of protons that the element has in its nucleus. Cobalt has 27 protons whilst Nickel has one more proton at 28 which is why it comes after Cobalt.
Answer:
lower density
Explanation:
Use the drop-down menus to complete each sentence.
A
is an organism that eats other organisms to gain energy; it is also called
.
A
is an organism that makes its own food; it is also called
.
A
is an organism that breaks down waste and dead organisms.
Answer:
A consumer is an organism that eats other organisms to gain energy; it is also called a heterotroph.
A producer is an organism that makes its own food; it is also called an autotroph.
A decomposer is an organism that breaks down waste and dead organisms.
Explanation:
Green plants are examples of autotrophs that make their own food by photosynthesis - they don't rely on other organisms to provide them with energy.
In contrast, many organisms rely on other organisms as an energy source. These organisms are called consumers or heterotrophs. They consume producers and other consumers.
Decomposers such as some fungi, bacteria, and certain insects break down dead or decaying biological material and recycle the nutrients back into the soil.
Answer:consumer a heterotroph producer an autotroph decomposer
Explanation:
Which is NOT a reason why we use the scientific method?
To have something to share with other scientists
To minimize any mistakes and bias.
Because my teacher said so
To maintain good record keeping
Answer:
C. Because my teacher said so
Hope this helps :)
Answer:
Because my teacher said so
Explanation:
You good? lol
What is the definition of the word: Property (the scientific definition A makes up matter; makes up the world around us B an object or diagram C something that can be observed about a substance D to change the position of something HEalPPPPPPpPP
Answer:
i feel like the answer is A
What is the primary energy conversion that takes place in plants during photosynthesis? A. Electrical energy to heat energy B. Heat energy to chemical energy C. Light energy to chemical energy O D. Chemical energy to heat energy
Answer:
Photosynthesis in plants converts solar energy into chemical energy using electrons and protons from water. ... In the energy-transduction reactions, solar energy is converted into chemical energy in the form of two energy-transporting molecules, ATP and NADPH.
Answer:
light energy to chemical energy :]
Explanation:
Solve for Density using D=M/V
10. A toy has a mass of 45g and Volume of 10 CM3.What is it's density?
Answer:
4.5 g/cm^3
Explanation:
use formula d=m/v
45/10
d= 4.5 g/cm^3
if you know the answer to any of these pls help out I'll give brainiest. also a lot of points
Answer:
5. Divergent boundaries. Divergent boundaries can make underwater ocean trenches.
Complete the Lewis Dot structure for the molecule H-C≡N and determine how many bonding and non-bonding electrons nitrogen has:
Answer:
I believe that in H-C≡N, Nitrogen has 4 bonding electrons and 2 non-bonding electrons.
(:
Explanation:
Questions and Problems 22 When water is heated, the temperature eventually reaches a constant value and forms a plateau on the graph. What does the plateau indicate?
Answer:
It indicates phase changes: melting then later boiling.
Explanation:
On the heating curve of water, the plateau marks phase change transitions.The temperature remains constant during this period.The first phase change is melting of water.The second phase change is boiling of water to gas.
How many moles are in 1.93x1023 particles of Na3PO4?
Answer:
The answer is 0.32 molesExplanation:
To find the number of moles given the number of entities we use the formula
[tex]n = \frac{N}{L} \\ [/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question
N = 1.93 × 10²³ particles
We have
[tex]n = \frac{1.93 \times {10}^{23} }{6.02 \times {10}^{23 } } \\ = 0.320598006...[/tex]
We have the final answer as
0.32 molesHope this helps you
No. of particles of Na₃PO₄ = 1.93×10²³
We have to find number of moles of the given compound[tex].[/tex]
Number of moles cam be found by using this formula :
[tex]\bigstar\:\boxed{\bf{\purple{n=\dfrac{N}{N_A}}}}[/tex]
n denotes number of molesN denotes number of particles[tex]\sf{N_A}[/tex]denotes avogadro's constantWe know that,
[tex]\bf{N_A}[/tex] = 6.022×10²³★ Calculation :
➠ n = N/[tex]\sf{N_A}[/tex]
➠ n = (1.93×10²³)/(6.022×10²³)
➠ n = 0.32 moles
★ Explore More :
n = weight / Molar massn = volume / 22.4Hope It Helps!