Answer:
Add a coefficient of 3 in front of the 02 to balance the 6 O atoms in the products
Explanation:
Add a coefficient of 3 in front of the 02 to balance the 6 O atoms in the products
what is the speed of a car traveling east 85 miles over 45 minutes ? 0.5 mph
1.9 miles per minute
1.9 miles per minute East
0.52 mph
Answer:
1.9 miles per minute
Explanation:
The speed of a substance can be calculated by using the formula:
S = d/t
Where;
S = speed (m/s)
D = distance (m)
t = time (s)
In this question, the units for the distance and time are miles and minutes respectively. Hence, the speed is:
S = 85miles ÷ 45 mins
S = 1.888 miles/min
S = 1.9 miles per minute
What was the carbon cycle on the prairie like?
Answer:
Explanation:
Carbon cycle explains the movement of carbon between the earth's biosphere, geosphere, hydrosphere and atmosphere. ... Carbon atoms are then released as carbon dioxide when organisms respire. The formation of fossil fuels and sedimentary rocks contribute to the carbon cycle for very long periods.
I need help ASAP ... please
Answer:
help with what?
the cost of table NaCl is Rs.20 per kg.Calculate its cost permole.
plzzzzz answer me
Answer:
Rs. 1.2 per mole
Explanation:
Given parameters:
Cost of NaCl = Rs. 20 per kg
Unknown:
Cost per mole = ?
Solution:
The problem here is simply to convert the unit to:
Rs. per mole
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of NaCl = 23 + 35.5 = 58.5g/mol
Now, for 1kg;
Number of moles = [tex]\frac{1000}{58.5}[/tex] = 17.1moles
So;
[tex]\frac{Rs. 20}{kg}[/tex] x [tex]\frac{1kg}{17.1moles}[/tex] = Rs. 1.2 per mole
Predict what would happen if a positive charge is placed between the two charges and allowed to move. Explain.
Answer: The same effect happens when you put two electrons near each other (or two protons). We know that if you have a single positively charged particle, a positively .
Explanation: i hope that helped. have a good day.
Which chemical equation follows the law of conservation of mass?
A. 2NaOH + H2S04 - Na2SO4 + H20
B. NaOH+H2SO4 - Na2SO4 + 2H20
C. 2NaOH + H2S04 - Na2SO4 + 2H20
D. NaOH + H2SO4 - Na2SO4+H20
Answer:
C. 2NaOH + H₂SO₄ -> Na₂SO₄ + 2H₂O
Explanation:
Simply count up the elements in the reactants and the products, then compare.
Reactants:
2 Na = 2 Na
2 O + 4 O = 6 O
2 H + 2 H = 4 H
Products:
2 Na = 2 Na
4 O + 2 O = 6 O
2 x H₂ = 4 H
Because the constituent elements in the reactants = products, the law of conservation of mass is preserved. You can check the other 3 options to see that they will not equal each other.
Don't forget to distribute the coefficients to every part of the formula; on the other hand, subscripts only apply to the element they are under. If a coefficient needs to be multiplied to an element with a subscript, use the subscript instead of 1 (1 is when there are no subscripts).
*blank* carry blood away from the heart, while *blank* carry blood back to the heart.
fill in the blank spaces...
A. capillaries
B. arteries
C. Blood vessels
D. Veins
Answer:
i think its C im not so sure
Explanation:
nrjdkfkzhsugogo
A
occurs when what the scientist expects changes how the results of an experiment are viewed?
A. conundrum
B. bias
C. impass
Answer:
conundrum
Explanation:
its not bias or impass
Explain how Earth is heated through radiation
Answer:
Radiation happens when heat moves as energy waves, called infrared waves, directly from its source to something else. This is how the heat from the Sun gets to Earth. In fact, all hot things radiate heat to cooler things. When the heat waves hits the cooler thing, they make the molecules of the cooler object speed up.
Which element has the highest first ionization energy?
A) Si
B) P
C) S
D)Ci
And why?
Answer:
see the pic for more details
An atom with 2 protons and 4 neutrons is called?
Answer:
Its nucleus
Explanation:
also contains two neutrons. Since 2 + 2 = 4, we know that the mass number of the helium atom is 4. Finally, the helium atom also contains two electrons since the number of electrons must equal the number of protons.
Answer: Its nucleus also contains two neutrons. Since 2 + 2 = 4, we know that the mass number of the helium atom is 4. Finally, the helium atom also contains two electrons since the number of electrons must equal the number of protons.
Explanation:
Why would farmers in the United States be especially concerned about a decrease in ground water?
Answer:
yes probably
Explanation:
the decrease would affect the plants growing in the ground cause there is no access water they can get
Using dimensional analysis, how many kilometers are there in 34 inches?
Answer:
There are many ways to figuring this out: you could use a ruler, a calculator or scrap paper.
Explanation:
This is not an actual flat out answer, but it’s helpful methods to getting the answer the next time you are stuck. Hope you are having a nice day. Bless your heart and soul.
I need help (yes again)
Answer:
with what?
Explanation:
When would it be appropriate to use a model instead of a controlled experiment
a
is the correct answer
The four molecules shown here are made of different combination of carbon, oxygen or hydrogen atoms. Below each molecule, list the types of atoms in it and how many atoms there are of each type. The the first is complete as an example
Answer:
1. Water molecule: Composed of two atoms of hydrogen and one atom of oxygen.
2. Oxygen gas molecule: composed of two oxygen atoms.
3. Carbon (iv) gas molecule: composed of one atom of carbon and two atoms oxygen.
Methane gas molecule: composed of one atom of carbon and four atoms of hydrogen.
Explanation:
1. The first molecule is a molecule of water. It is composed of two atoms of hydrogen and one atom of oxygen. The atom of oxygen is depicted in red color while the two hydrogen atoms are red in color.
2. The second molecule is an oxygen gas molecule. It composed of two oxygen atoms.
3. The third molecule is carbon (iv) oxide. It is composed of one atom of carbon (black color) and two atoms oxygen (in red color).
4. The fourth is the methane gas molecule. It is composed of one atom of carbon (black color) and four atoms of hydrogen (white color).
7. Think and discuss: As you move down a group, you will recall that the radius increases.
Why do you think an increase in atomic radius would result in a lower
ionization energy?
8. Think and discuss: As you move across a period, you will recall that the radius decreases.
Why do you think a decrease in atomic radius would result in a greater ionization energy?
9. Predict: Electron affinity (EA) refers to the energy released when an electron is added to
an atom. This release of energy is always expressed as a negative value. The greater the
magnitude of the negative value, the greater the attraction for electrons. (An EA of -100
kJ/mol would indicate a stronger attraction for electrons than an EA of -50 kJ/mol.)
How do you think the size of an atom will affect its ability to attract additional electrons?
Answer:
See explanation
Explanation:
7. As we move down the group more shells are added. The addition of more shells means that the atom becomes larger and the outermost electron is now at greater distance from the nucleus and screening effect becomes very important. This greater screening effect of the inner electron reduces the magnitude of effective nuclear charge on the outermost electron thereby lowering the ionization energy.
8. As we move across the period, the effective nuclear charge increases without a corresponding increase in the number of shells. As a result of this, the outermost electron becomes more tightly bound to the nucleus as the atom becomes smaller and atomic radius decreases causing a rise in the ionization energy from left to right across a period.
9. Actually, the smaller an atom is the greater its electron affinity. The smaller the atom is, the more the outermost shell is drawn closer to the nucleus and this means that the atom is better able to attract electrons to itself.
It is due to the size of atom which varies its force of attraction.
As you move down a group, the atomic radius increases due to addition of more number of shells in an atom. This increase in atomic radius would result in a lower ionization energy because the valance electron is farther from the nucleus and held with weak attractive force so less energy is required to remove it.
While on the other hand, as we move from left to right in a periodic table the atomic radius decreases due to addition of more electrons which shrinks the atom and brought the valance shell closer to the nucleus so it becomes harder to remove an electron because the nucleus held these electrons very tightly.
The size of an atom will affect its ability to attract additional electrons because of its force of attraction. Atoms with small radius has more ability to attract electrons due to higher force of attraction as compared to higher atomic radius atoms.
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Please answer fast!!!!!!!The table shows the distance that car 2 traveled during three trials. What is the average distance traveled by car 2 without a bumper? Be sure to show your work.
Trial 1 Trial 2 Trial 3
25, 27, 29
Answer: 25 + 27 + 29 = 81
81 divided by 3 = 27
your answer is 27
Explanation: you add them all together then however many numbers there are is how you divide it
Answer:
81 and 27 i think
Explanation:
Explain what makes a cirrus cloud.
Answer:
the answer is below
Explanation:
Cirrus clouds form from the ascent of dry air, making the small quantity of water vapour in the air undergo deposition into ice (to change from a gas directly into a solid). Cirrus is made up completely of ice crystals, which provides their white colour and form in a wide range of shapes and sizes.
Copernicus challenged the way in which people of his time thought about the solar system. How did Copernicus describe the motion of the sun?
A.The sun is stationary.
B.The sun revolves around Earth.
C.The sun moves in an elliptical orbit.
D.The sun moves in a straight line through space.
Answer:
A. The sun is stationary and we rotate around it.
Hope This Helps!
Answer:
A
Explanation:
the sun is stationary
What are the coefficients that would correctly balance this equation? __Zn+__K2CrO4 > __K + __ZnCrO4
A. 2,1,2,1
B. 1,2,3,1
C. 1,2,1,2
D. 1,1,2,1
Can someone please help
D. 1,1,2,1
Further explanationEqualization of chemical reactions can be done using variables. Steps in equalizing the reaction equation:
1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c, etc. 2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index (subscript) between reactant and product 3. Select the coefficient of the substance with the most complex chemical formula equal to 1Reaction(unbalanced)
Zn+K₂CrO₄ ⇒ K + ZnCrO₄
Give coefficient
aZn+K₂CrO₄ ⇒ bK + cZnCrO₄
Zn, left=a, right=c⇒a=c
K, left=2, right=b⇒b=2
Cr, left=1, right=c⇒c=1⇒a=1
O,left=4,right=4c⇒4c=4⇒c=1
Reaction(balanced0
Zn+K₂CrO₄ ⇒ 2K + ZnCrO₄
Need help ASAP . Anybody ?
- 20 points
The element magnesium is a
O Group 12, Transition Metal
O Period 3, Alkaline Earth Metal
Period 4. Alkali Metal
O Period 4, Halogen
How did you organize the tiles in part A? Describe the method that you used.
Answer:
I ordered the tiles from left to right and top to bottom as the numbers kept increasing. The tiles were also organized based on the color and shape that they were. The tiles with the same color and shape were arranged in the same column.
Explanation:
In the modern periodic table, the elements are listed in order of increasing atomic number and elements having similar chemical properties naturally line up in the same column (group).
Based on the quantity as well as shape of each tile, arrange them in the table.
What is tile?The majority of the time, tiles are thin, square usually rectangular coverings made of durable materials like ceramic, stone, metals, baked clay, or perhaps even glass. They are typically put in place inside an arrangement to cover surfaces including tabletops, borders, floors, walls, and roofs.
In another definition, a tile is indeed a building material or a comparable object, such the rectangular game counters. The word comes taken from the Latin phrase tegula, which means a roof tile made of heated clay. Based on the quantity as well as shape of each tile, arrange them in the table.
Therefore, based on the quantity as well as shape of each tile, arrange them in the table.
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Which is the process by which a gas changes to a solid?
deposition
evaporation
freezing
sublimation
Answer:
Deposition
Explanation:
I know this is correct because i just took the test JDHSGVDK
Answer:
it's a (deposition)
Explanation:
right on edge
Green light has a frequency of 6.01 x 10^14 Hz. What is the wavelength? (Round to the nearest hundredth) *
Answer:
4.99 x 10⁻⁷ meters or 499 nanometers
Explanation:
Use the formula:
λ = c/ν, where λ = wavelength, c = the speed of light (it's constant, 2.998 x 10⁸ m/s), and ν = frequency
λ = (2.998 x 10⁸ m/s)/(6.01 x 10¹⁴ 1/s)
λ = 4.98835 x 10⁻⁷
Round to nearest hundreth and you get 4.99 x 10⁻⁷ meters, or 499 nanometers.
The ____ energy of an object increases with its height.
Thermal
Chemical potential
Gravitational Potential
kinetic
Answer:
chemichal potential
Explanation:
Answer:
Gravitational Potential
Which air is driest? Air Temp 30F Dew-point 29F, Air Temp 77F Dew-point 19F, Air Temp 66F Dew-point 60F, or Air Temp 50F Dew-point 36F
Answer:
Air Temp 77F Dew-point 19F
Explanation:
Quiz
The dew point can be described as the temperature required by the air to be cooled. The driest air will have a higher dew point, therefore, at an air temperature of 66°F and a dew point of 60°F. Therefore, option (C) is correct.
What is dew point?The dew point can be defined as the temperature at which air should be cooled to become saturated with water vapor assuming constant air pressure and water content.
Moisture capacity will decrease below the dew point. Airborne water vapor will condense to form liquid water or dew. Dew develops on the surface and occurs through contact with a cooler surface.
The dew point is called the frost point when the temperature is below the freezing point because frost is produced by deposition rather than a condensation of water.
The humidity also impacts the dew point. The dew point increases when there is higher moisture in the atmosphere. Therefore, the higher dew point refers to less humid air or drier.
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Can somebody help me with this??!
Which mineral can be found in the rocks phyllite, sandstone, and granite?
1.
quartz
2.
pyroxene
3.
gypsum
4.
calcite
Sub
Answer:
1 quartz
Explanation:
pls tell me if I'm wrong
Quartz can be found in the rocks phyllite, sandstone, and granite.
Hence, Option (1) is correct answer.
What is Rocks phyllite ?Rock phyllite are composed of mainly quartz, mica and chlorites. It is a soft and durable rock.
What is Sandstone ?Sandstone are composed of mainly quartz, feldspar and lithic fragments. It is a sedimentary rock.
What is Granite ?Granite are composed of three minerals mainly that is quartz, plagioclase and potassium feldspar and usually carry mica or hornblende. It is a light coloured igneous rock.
Thus from above conclusion we can say that Quartz can be found in the rocks phyllite, sandstone, and granite.
Hence, Option (1) is correct answer.
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