Coal is burned in the atmosphere to release energy. Which gas is needed for burning to take place?
Answers
Answer:
Oxygen gas is needed for burning to take place.
Explanation:
I don't say you have to mark my ans as brainliest but if it has really helped you plz don't forget to thank me...
Related Questions
Where is the DNA stored in a cell?
Answers
Answer: nucleus
Explanation:
Research on measures taken to reduce the impact of thermal and nuclear electricity.
Answers
Match each letter with the part of the wave it represents in the diagram below.
Answers
See diagram attached
Answer:
A-wavelength, B=amplitude, C=crest, D=trough
Explanation:
Which statement best describes properties of elements? A) All elements have a similar structure and hardness. B) All elements are either metals or gases. C) All elements are solid and magnetic. D) All elements have mass and occupy space
Answers
Answer:
D
Explanation:
That is the right answer
Mimicry is a pattern of coloring that makes an organism resemble another organism. Milk snakes, which are harmless, resemble coral snakes, which are deadly. Milk snakes with which of the following characteristics are most likely to survive?
Answers
Answer:
A
Explanation:
Answer: A
Explanation:
What are all the breeds of dogs and how many breeds of dogs are there?
Answers
Answer:
In the United States alone, the AKC's dog breed list currently includes 190 dog breeds. Worldwide, the FCI lists 360 officially recognized breeds.
Explanation:
There are approximately 400 separate breeds of purebred dogs worldwide. A purebred dog is considered to be one whose genealogy is traceable for three generations within the same breed
There are currently more than 340 different breeds of dogs recognised throughout the world.
What happens to the atoms that make up hydrogen fuel as it burns?
Answers
Answer:
When hydrogen fuel burns, its atoms combine with oxygen atoms in the air, which creates a chemical reaction that releases energy in the form of heat and light. The hydrogen atoms lose their outermost electrons, becoming positively charged ions (protons). These ions combine with the oxygen atoms to form water molecules (H2O), which evaporate into the air as steam. Therefore, the atoms that make up hydrogen fuel ultimately become part of water molecules during the process of combustion.
Explanation:
Millions of years ago in many different regions of the world, large-scale burials of organic matter were followed by the formation of underground traps. Which of the following provides evidence of these past geologic processes?
A.
Areas where these geologic processes occurred now have major petroleum reserves.
B.
Areas where these geologic processes occurred now have very fertile soil.
C.
Areas where these geologic processes occurred now have major groundwater reserves.
D.
Areas where these geologic processes occurred now have very few natural resources.
Answers
The evidence of these past geologic processes is provided by areas where these geologic processes occurred now have major petroleum reserves and the correct option is option A.
What are fossil fuels?
Fossil fuels are compound mixtures made of fossilized plant and animal remnants from millions of years ago. The creation of fossil fuels—either oil, natural gas, or coal—from these fossils is determined by the type of fossil, the amount of heat, and the amount of pressure.
Fossil fuels are a non-renewable source of energy. Most of the energy used by us is obtained by the burning of fossil fuels. These fossil fuels are used up at a faster rate. They cannot be regrown at a scale compared to their consumption.
Petroleum, natural gas, coal, etc. are some examples of fossil fuels.
Therefore, the evidence of these past geologic processes is provided by areas where these geologic processes occurred now have major petroleum reserves and the correct option is option A.
Learn more about Fossil fuels, here:
https://brainly.com/question/3371055
#SPJ2
Why does transporting materials during production release carbon dioxide?
-Materials release carbon dioxide as they move around in vehicles.
-Materials exposed to air get warm easily. The warm materials release more carbon dioxide.
-Materials break down as they move and cause pollution. Pollution releases carbon dioxide.
-Vehicles used to move materials consume fuel and release carbon dioxide.
Answers
Answer:4
Explanation:
What are the physical properties of the cookie/cracker? List 3 or more.
Answers
Answer
cookie
shape:circle
texture: bumpy rough on side
color:brown
size: bigger than a quarter
Explanation:
I cant see it so just describe the color shape size texture
Answer:
1. Delicious
2. Soft
3. Cronchyy (ik its crunchy )
4. Best foods you will ever eat
Explanation:
Try it for yourself!
If 5.85g of table salt, NaCI, are dissolved in water to make a solution of 250ml, what is the concentration of the solution, in mol/dm3 or mol/l?
Answers
Answer:
CONCENTRATION IS 0.4 mol/dm3
Explanation:
If 5.85g of table salt, NaCI, are dissolved in water to make a solution of 250ml, what is the concentration of the solution, in mol/dm3 or mol/l?
Mass = 5.85 g
Substance = NaCl
Volume = 250 mL = 0.25 L
Concentration in mol/dm3 = concentration in g/dm3 / Relative Molecular mass
Step 1: calculate the concentration in g/dm3
5.85 g = 0.25 L
(5.85 / 0.25) g = 1 L
Concentration in g/dm3 = 23.4 g/dm3
Step 2: calculate the relative molecular mass of NaCl
(Na= 23, Cl = 35.5)
RMM = (23+ 35.5)
RMM = 58.5 g/mol
Step 3: calculate the concentration in mol/dm3
Conc. in mol/dm3 = Conc. in g/dm3 / RMM
Conc. in mol/dm3 = 23.4 g/dm3 / 58.5 g/mol
Conc. in mol/dm3 = 0.4 mol/dm3
So therefore, the concentration in mol/dm3 of the solution is 0.4 mol/dm3
Answer:
Explanation: 0.4004mol/L
Given
Mass of NaCl = 5.85g
no of moles of NaCL =Mass/ molar mass
but molar mass of NaCl= (22.99 g/mol + 35.45 gmol )= 58.44 g/mol.
therefore, Number of moles= 5.85g/ 58.44g/mol= =0.100 moles
Also, converting 250ml to litres becomes 250/1000= 0.25L
Concentration of the solution in mol /L =
Concentration = number of moles of solutes/ total volume of solution
therefore C= n/v= 0.100moles/ 0.25L = 0.4004mol/L
1. Using D10W and a vial of NaCl 4 mEq/mL, how many mL of NaCl are needed to prepare 250 mL of a
D10/NS solution?
a. 4.8mL
b. 9.6ml
c. 19.6mL
d. 154mL
Answers
To prepare 250 mL of a D10/NS solution using D10W and a vial of NaCl 4 mEq/mL, you would need 9.6 mL of NaCl. Normal saline (NS) contains 154 mEq/L of sodium chloride (NaCl). To prepare 250 mL of NS, you would need 250 mL * (154 mEq/L) = 38500 mEq of NaCl. Since the vial of NaCl contains 4 mEq/mL, you would need 38500 mEq / (4 mEq/mL) = 9625 mL = 9.6 mL of NaCl. So the correct answer is b. 9.6ml.
Melissa wants to separate a mixture of many tiny beads that are all the same size. Some of the beads are made from pine wood and some of the beads are metal.
What would be the easiest way for her to separate the mixture?
A. Add water and the wooden beads will dissolve.
B. Add water and the wooden beads will float.
C. Sift the beads and the wooden ones will stay on top.
D. Pick out all the wooden beads by hand.
Answers
Answer:
Your answer here is B. Add water and the wooden beads will float.
Explanation:
Please mark me as Brainliest! :)
B. Add water and the wooden beads will float.
Select three (3) types of waves that can be harmful to life.
a. Visible light
b. Ultraviolet rays
c. Radio waves
d. Microwaves
e. X-rays
f. Infrafred rays
g. gamma rays
Answers
Answer:
opt a f g is correct answer ok
Answer:
x-rays,gamma rays and ultraviolet rays are harmful to life.
Explanation:
hope this will hep you!
please helpp, its just true or false
Answers
Answer:true
Explanation:
List at least three properties of matter.
Answers
Answer: Mass, Volume, shape
Explanation: that’s the three basic properties of matter
Write a lab report on the lab ¨How do the process of conduction, convection, and radiation help distribute energy on earth.¨ for edge 1. Purpose- state the purpose of the lab.
2. Hypothesis- (Use if, then, because in your statement)
3. Materials- list all materials used in the lab
4. Procedures- state step by step what is being done in the lab
5. Observation/data- state what is being measured
6. Analysis/conclusion-state by summing up what was done in the lab and evaluate your
hypothesis with what actually happened
Answers
Answer: The sections of a lab report can vary between scientific fields and course requirements, but they usually contain the purpose, methods, and findings of a lab experiment. Each section of a lab report has its own purpose. 1. Title: expresses the topic of your study 2. Abstract: summarizes your research aims, methods, results, and conclusions
Explanation:
True or False: Organic substances are always made from the same four elements including carbon, hydrogen, oxygen, and nitrogen.
FALSE
TRUE
Answers
Answer:
Four elements, hydrogen, carbon, oxygen and nitrogen, are the major components of most organic compounds.Answer:
true
Explanation:
A chemical reaction occurs. Which statement is true of the reactants and the products in the reaction?
A- The atoms in the products were regrouped into different molecules to form the reactants
B- The atoms in the reactants were regrouped into different molecules to form the products
C- The atoms in the products were destroyed and new molecules appeared to form the reactants
D- The atoms in the reactants were destroyed and new molecules appeared to form the products.
Answers
Answer:
Explanation:
b
brainliest pls
D
Step by step explanation:
Chemical reactions occur when chemical bonds between atoms are formed or broken. The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.
How is the momentum of an object determined?
What happens every time one of the boys playing ping pong hits the ball?
How could the boy playing ping pong keep from hitting the ball off the table?
I GIVE 20 PTS PLS HEELP
Answers
Answer: He needs to hit the ball with less force.
Explanation:
hope this helps
2. Based off the answer to the first question, by hitting the ping pong ball, momentum is transferred from the boy to the ball. Causing the ball to have more velocity/speed and gain more momentum.
3. Momentum before = momentum after
Every time the ball hits the table, some momentum transfers from the ball to the table. Every time the player hits the ball, some momentum transfers from the player to the ball. This allows the player to continue playing ping pong as the ball always has momentum.
PLSSSSSSSS HELP MEEEEEEEEEEEEEE
Answers
Answer: The answer to your question is B,C,D.
Answer: i think A, B, D?
Explanation:
Determine the overall energy change for the reaction between hydrogen and oxygen shown in Question 13. Use Figure 2.
Answers
Answer:
–500KJ
Explanation:
Data obtained from the question include the following:
Heat of reactant (Hr) = 800KJ
Heat of product (Hp) = 300KJ
Enthalphy change (ΔH) =..?
The enthalphy change is simply defined as the difference between the heat of product and the heat of reactant i.e
Enthalphy change = Heat of product – Heat of reactant
ΔH = Hp – Hr
With the above formula, we can easily calculate the enthalphy change as follow
ΔH = Hp – Hr
ΔH = 300 – 800
ΔH = –500KJ.
Therefore, the overall energy change for the reaction between hydrogen and oxygen shown in the diagram above is –500KJ
A student wants to know how the number of geese in a study area affects the number of parts in their songs. She performs an experiment and records the data in a table.
Which two terms describe this type of data?
A.
Quantitative
B.
Empirical
C.
Theoretical
D.
Qualitative
Answers
The two terms that describe this type of data are Quantitative and Qualitative. Therefore, the correct options are A and D.
Data that can be measured and expressed numerically, denoting quantities or amounts, is called quantitative data. In this example, the number of geese is counted and correlated with the number of pieces in their symphony. Instead of being numerical, descriptive and categorical data are called qualitative data. In this example, it is observed and noted how many sections are in the swan songs (descriptive categories).
Therefore, the correct options are A and D.
Learn more about Qualitative data, here:
https://brainly.com/question/1417786
#SPJ3
Match these items.
1. imprint of plant or animal
original-remains fossil
2. undecayed plant or animal part
carbonized fossil
3. replaced by a mineral
petrified fossil
4. only carbon remains
cleavage
5. mountain
geology
6. from magma
metamorphic
7. from physical and chemical changes
igneous
8. sandstone
print fossil
9. helps identify rocks
landform
10. science of Earth
sedimentary
Answers
1. print fossil
2. carbonized fossil
3. petrified fossil
4. cleavage
5. landform
6. igneous
7. metamorphic
8. print fossil
9. geology
10. sedimentary
\(\)
The print fossil, original-remains fossil, petrified fossil, carbonized fossil, landform, igneous, metamorphic, sedimentary, cleavage, and geology are the respective matches as given in the question.
Print fossil is imprint of plant or animal and basically known as fossil impression. Original-remains fossil comprises of the original tissues and parts of organism and undecayed plant or animal part. Petrified fossil is replaced by a mineral. Carbonized fossil is only carbon remains. Landform is a mountain. Igneous is from magma.
Metamorphic is from physical and chemical changes. Sedimentary rocks are sandstone. Cleavage helps to identify rocks. Geology is the study of science of earth.
Learn more about rocks and fossils:
brainly.com/question/2168243
HURRY PLEASE In Maglev trains, fields exist between objects that are not in contact but can interact at a distance.
True
Or
False
Answers
In Maglev trains, magnetic force exist between objects that are not in contact but can interact at a distance.Hence, the statement is true.
What is a force?Force is defined as a cause which is capable of changing the motion of an object. It can cause an object which has mass to change it's velocity. It is also simply a push or a pull . It has both magnitude as well as direction.Hence, it is a vector quantity.
It has SI units of Newton and is represented by'F'.Newton's second law states that force which acts on an object is equal to momentum which changes with time. If mass of object is constant, acceleration is directly proportional to net force acting on an object.
The concepts which related to force are thrust and torque .Thrust increases the velocity of an object and torque produces change in rotational speed of an object.
Learn more about force,here:
https://brainly.com/question/26115859
#SPJ6
Compare the human and the Amoeba together, here are the questions you'll be answering.
How does the
organism move?
How does the
organism breathe?
How does the
organism eat?
How many cells are in
the organism?
Neat fact (one) about
your organism.
Neat fact (two) about
your organism.
Neat fact (three) about
your organism
Answers
Answer:
1.They can move in a variety of ways, including walking, running, jumping, crawling, climbing, swimming, gliding, and flying.
2.Can breathe thanks to our respiratory system and lungs.
3.All animals eat other living things to obtain food. Carnivores consume other animals, whilst herbivores consume vegetation. As omnivores, or animals that consume both plants and other animals, humans are. Feeding on decomposing plants and animals are decomposers like fungus and earthworms.
4.36,2 trillion cell units. Although not the final figure, this is a pretty strong beginning.
2. They breathe through the lungs with the help from the contraction and expansion of the intercostal muscles
3. They use their teeth to eat
4. There are trillion cells
Oceans can store large amounts of thermal energy. How does this affect climates?
Answers
Answer: It stabilizes the Earth's climate system
Explanation:
Water has a boiling point of 100 degrees Celsius, a melting point of 0 degrees Celsius, and a density of 1 g/cm. What is this a list of?
1. unimportant details
2. chemical properties
3. incorrect facts
4. physical properties
Answers
Answer:
Chemical properties
Explanation:
Water has a boiling point of 100°C or 373 KWater has melting point of 0°C or more exactly 273.16KThe density of water at 4°C is 1000kg/m^3Where does most fresh water exist?
Answers
Answer:
aquifers, ice caps, and glaciers I think
(C) aquifers, ice caps and glaciers
can praseodymium conduct electricity
Answers
Answer:
praseodymium can conduct electricity as it is one of it's conductivities