Answer:
C
Explanation:
Took the test on egde
Burning of wood and coal causes an increases greenhouse gas.
What is greenhouse gas?A greenhouse gas absorbs as well as emits radiant energy in the thermal infrared region, resulting in the effect of greenhouse gas . Water vapor, carbon dioxide ([tex]CO_{2}[/tex]), methane([tex]CH_{4}[/tex]), nitrous oxide, and ozone([tex]O_{3}[/tex]) are the principal greenhouse gases in the earth's atmosphere.
Generally, it is known that by burning of wood and coal carbon di-oxide gas will release. Therefore, burning of wood and coal will be responsible for greenhouse gas.
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Please help Please Help
Answer:
1) false
2) true
3) true
4) false
5) false. I think
6) false
Please help make sure its correct thanks
The empirical formula of metal iodide : CoI₃(Cobalt(III) Iodide)
Further explanation13.02 g sample of Cobalt , then mol Co(MW=58.933 g/mol) :
[tex]\tt mol=\dfrac{mass}{Ar}=\\\\mol=\dfrac{13.02~g}{58.933}\\\\mol=0.221[/tex]
Mass of metal iodide formed : 97.12 g, so mass of Iodine :
[tex]\tt =mass~metal~iodide-mass~Cobalt\\\\=97.12-13.02\\\\=84.1~g[/tex]
Then mol iodine (MW=126.9045 g/mol) :
[tex]\tt \dfrac{84.1}{126.9045}=0.663[/tex]
mol ratio of Cobalt and Iodine in the compound :
[tex]\tt 0.221\div 0.663=1\div 3[/tex]
if 2g of water is at 1C and a copper block at 3C is added to it, and the finall tempertature of mixture is 7 C , what is the mass of the copper?
Answer:
The APA rule for numbers is that you should begin a sentence with a word even if the number is greater than nine, and the word "percent" should also be used.
Explanation:
Which of the following is used to break Water down to its elements:
A) Electricity
B) Pressure
C) Heat
D) Light
How many aluminum atoms are in 3.85 mol?
Answer: 4.00
Explanation:
is the sun a star?explain
Answer:
The Sun is a star. There are lots of stars, but the Sun is the closest one to Earth. It is the center of our solar system. The Sun is a hot ball of glowing gases.
Answer:
the sun is a star
Explanation:
Our Sun is an ordinary star, just one among hundreds of billions of stars in the Milky Way Galaxy. As the only star we can observe in detail, it provides a basis for our understanding of all stars. The Sun is composed almost entirely of hydrogen and helium gas.
How many total atoms does O have in Al2O2
Answer:
2
Explanation:
2.5kg weighing cat climbing at the top of the tree has a potential energy of 986 J. Find the height.
Answer:
The height = 39.44 m
Explanation:
Given:
Mass m = 2.5 kg
Potential energy = 986 J
Find:
The height
Computation:
Potential energy = mgh
g = Acceleration due to gravity = 10 m/s²
986 = (2.5)(10)(h)
h = 39.44 m
The height = 39.44 m
An object's shadow was observed and measured at different times of the day. The data was recorded in the chart below. How does the data provide evidence that the sun is changing position in the sky throughout the day?
Answer:
Yes, the data provides evidence.
Explanation:
The data provides evidence of changing in length of object's shadow at different times of the day which indicates that the sun is changing position in the sky throughout the day. At the sunrise and sunset, the length of shadow is highest as compared to other times of the day while on the other hand, at the afternoon when the sun is present on the head, the shadow's length is the lowest. So we can say that the sun is changing position in the sky throughout the day.
At lower altitudes what does the troposphere have that is a major factor in the formation of weather?
A.) dust particles
B.) water vapor
C.) ozone layer
D.) the jet stream
Answer:
B - Water vapor
Explanation:
Finely ground nickel (II) hydroxide is placed in a beaker of water. It sinks to the bottom of the beaker and remains unchanged. An aqueous solution of hydrochloric acid is then added to the beaker and the Ni(OH)2 disappears. Which reaction best describes what occurred in the beaker?
Your answer:
Ni(OH)2 (s) + HCl (aq) → NiO (aq) + H2 (g) + HCl (aq)
Ni(OH)2 (s) + 2 HCl (aq) → NiCl2 (aq) + 2 H2O (l)
Ni(OH)2 (s) + 2 H2O (l) → NiCl2 (aq) + 2 H2O (l)
Ni(OH)2 (s) + 2 H2O (l) → NiCl2 (aq) + 3 H2O (l) + O2 (g)
Explanation:
Acid-base reaction will give salt and water.
The 2nd option is correct.
The chemical equation Ni(OH)₂ (s) + 2 HCl (aq) → NiCl₂(aq) + 2 H₂O (l) represents what happened in the beaker as acid and base reaction gives salt and water.
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.
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Describe three characteristics of the outer core and explain why the outer core is so important to humans on earth.
Answer:
The outer core is the only layer that is liquid. It is also mainly made from nickel and iron. The main job of the outer core is that it's responsible for the Earth's magnetic field. As the earth spins, the liquid inside this layer spins aswell, keeping it balanced.
The fourth principal energy level has
33. A basketball bounces on the gym floor nine times and finally comes to a rest. Which of these BEST explains why the
basketball rises to a lower height each time it bounces?
A. Gravity increases as the basketball bounces.
B. The floor adds energy to the bouncing basketball.
C. Energy is transferred from the basketball to the floor.
D. The air inside the basketball is heavier than the surrounding air.
How many manganese atoms are in each formula unit of potassium permanganate?
calculate the volume occupied by 0.500 mol of co2 at a pressure of 150 and temperature if 19 degrees celsius
Answer:
i think its A sorry if im wrong
Explanation:
Read the article and use the information to complete this task: Fuel Cell Vehicles Construct an argument for or against the immediate introduction of fuel-cell cars. Include likely points of objection from those with opposing views (such as environmental and economic impacts) as well as counterarguments to those objections.
Answer:
It causes no pollution.
It is less durable and very expensive.
Explanation:
Fuel Cell Vehicles are the vehicles which moves by using hydrogen gas to power an electric motor as compared to conventional vehicles that moves by burning of fossil fuels. There is no bad effect on the environment because Fuel Cell Vehicles cause no pollution like conventional vehicles. Due to less durable and very expensive, Fuel Cell Vehicles can't take the place of conventional vehicles because its higher price which is not affordable for the people.
Answer:
fuel cost and availability
vehicle cost and availability
domestic fuel sources
pollution
onboard fuel storage
fuel cell performance
How many grams of potassium oxide would be needed to produce 5.00 g of potassium nitrate (KNO3) ?
Answer:
Mass = 2.355 g
Explanation:
Given data:
Mass of K₂O needed = ?
Mass of KNO₃ produced = 5.00 g
Solution:
Solution:
K₂O + 2HNO₃ → 2KNO₃ + H₂O
Number of moles of KNO₃:
Number of moles = mass/molar mass
Number of moles = 5.00 g/ 101.1 g/mol
Number of moles = 0.05 mol
now we will compare the moles of KNO₃ and K₂O.
KNO₃ : K₂O
2 : 1
0.05 : 1/2×0.05 = 0.025 mol
Mass of potassium oxide needed in gram:
Mass = number of moles × molar mass
Mass = 0.025 mol × 94.2 g/mol
Mass = 2.355 g
1.- Escribe sobre la línea el nombre del grupo funcional al que pertenecen los siguientes compuestos. a.) CO2_____________ b).Na2O_______________ c). HgH____________ d.) HCl_____________ e.) Li OH______________ f.) H2sO4___________ ¿?
Answer:
Explanation:
Hola! ¿Cómo estás?
Los grupos funcionales se ocupan de la química orgánica y no de la química inorgánica. La química orgánica son los alcanos, alquenos, alquinos y otros. Lo que ha escrito allí como ejemplos no es química orgánica, sino química inorgánica. Eso hace que sea imposible encontrar su grupo funcional, ya que los elementos y compuestos inorgánicos no tienen grupos funcionales.
Yo espero que entiendes
Iron(II) sulfate and calcium chloride
Answer: [tex]FeSO_4+CaCl_2\rightarrow CaSO_4+FeCl_2[/tex]
Explanation:
A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.
A double displacement reaction in which one of the product is formed as a solid is called as precipitation reaction.
The balanced chemical equation is:
[tex]FeSO_4+CaCl_2\rightarrow CaSO_4+FeCl_2[/tex]
4.5cm wide by 5.750cm long by 1.50cm tall what is the volume of the box
Answer:
volume of box is 38.81 cm³.
Explanation:
Given data:
Width of box = 4.5 cm
Height of box = 5.750 cm
Length of box = 1.50 cm
Solution:
Formula:
Volume = length × height × width
by putting values,
V = 1.50 cm × 5.750 cm× 4.5 cm
V = 38.81 cm³
Thus, the volume of box is 38.81 cm³.
Find the mass in grams of 2.00 x 10^23 molecules of C10H15O
Answer:
119.13 g C10H15O
Explanation:
First you have to convert the molecules to moles-
2.00×10^23 molecules ( 1 mole/ 6.02×10^23 molecules)
Then convert the moles to grams (you will need a periodic table)
Looking at the periodic table, we see that C=12, H=1, and O=16
so if we add 15 O's, 10 C's and 1 H, we get 361 g.
0.33 moles ( 361 g/1 mole )= 119.13 g
Tell me the main parts of the Earth Layers.
Answer:
Crust (the surface)
Upper Mantle (dense magma)
Lower Mantle (less dense magma)
Outer Core (pure liquid material)
Inner Core (dense material)
Hope that helps
The science of classifying and naming organisms based on their different characteristics is called _________.
Answer:
taxonomy
Explanation:
Answer:
Taxonomy
Explanation:
The taxonometric way of classifying organisms is based on similarities between different organisms. A biologist named Carolus Linnaeus started this naming system. He also chose to use Latin words.
Which particle has a postive charge? neutron, electron, proton or beta particle
Answer:
Proton I believe
Explanation:
The double replacement reaction between calcium nitrate (Ca(NO3)2) and potassium oxide (K2O ) is shown below:
Ca(NO3) 2 + K2 O → CaO + KNO3
How many grams of potassium oxide would be needed to produce 5.00 g of potassium nitrate (KNO3) ?
Answer:
Mass = 2.355 g
Explanation:
Given data:
Mass of K₂O needed = ?
Mass of KNO₃ produced = 5.00 g
Solution:
Chemical equation:
K₂O + Ca(NO₃)₂ → CaO + 2KNO₃
Number of moles of KNO₃:
Number of moles = mass/molar mass
Number of moles = 5.00 g/ 101.1 g/mol
Number of moles = 0.05 mol
now we will compare the moles of KNO₃ and K₂O.
KNO₃ : K₂O
2 : 1
0.05 : 1/2×0.05 = 0.025 mol
Mass of potassium oxide needed in gram:
Mass = number of moles × molar mass
Mass = 0.025 mol × 94.2 g/mol
Mass = 2.355 g
which terms means the loudness of sound?
A. volume
B. wavelength
C. medium
D. pitch
please help me it makes no sense!?
Explanation:
The answer is D, pitch.
Question 3(1 point)
A product taken orally that conains one or more ingredients that are intended to supplement one's diet and aren't considered food is called
оа
Ob
Oc
salmonella
dietary supplement
E Coli
dehydration
Od
Answer:
Group 8 is a group (column) of chemical elements in the periodic table. It consists of iron (Fe), ruthenium (Ru), osmium (Os) and hassium (Hs). They are all transition metals.
Explanation:
Calculate the volume in L of 12.9 g of NO2 at STP.
46.0 L NO2
12.9 L NO2
26.5 L NO2
6.28 L NO2
Answer:
6.28 L
Explanation:
Given data:
Volume of NO₂ = ?
Mass of NO₂ = 12.9 g
Temperature and pressure = ?
Solution:
First of all we will calculate the number of moles of gas.
Number of moles = mass/molar mass
Number of moles = 12.9 g/ 46 g/mol
Number of moles = 0.28 mol
At standard temperature and pressure 1 mole of gas occupy 22.4 L volume.
Thus,
0.28 mol × 22.4 L/1 mol
6.27 L ≅ 6.28 L
An atom of element Be has four protons, four electrons, and five neutrons. Which element below could be an isotope of this atom? Sodium-10 beryllium-10 boron-9 carbon-9
Answer:
beryllium-10
Explanation:
An isotope is an atom of the same element that has a different number of neutrons.
This means that an isotope of beryllium (Be) would have to be beryllium as well.
The number 10 references the fact that it has four protons and six neutrons:
4 protons + 6 neutrons = 10
While usually the element has 5 neutrons, so it is beryllium-9.
The element that could be an isotope of the atom with four protons, four electrons, and five neutrons is boron-9 and the correct option is option 3.
Isotopes are atoms of the same element that have a different number of neutrons. In this case, the given atom of beryllium has five neutrons, so an isotope of beryllium would have a different number of neutrons.
Among the options provided, boron-9 has a different number of neutrons (four) and is therefore a possible isotope of beryllium. Sodium-10, beryllium-10, and carbon-9 have different numbers of protons and are different elements.
Thus, the ideal selection is option 3.
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