Answer:The answer is 3.33%. Anna reduced her CO2 emissions by 3.33% from using 600 gallons of gas annually than from using 900 gallons of gasoline annually.
Explanation:
What elements make something organic?
Answer:
I think the elements are carbon, hydrogen and oxygen but I'm not completely sure.
What are two ways that atoms of different elements are different?
Answer:Explanation:Protons and other subatomic particles will be discussed a little later. The atoms of different elements are different from each other because they have different numbers of protons. The graphic below illustrates this point by showing the atoms of two elements in the containers of oxygen and hydrogen.
Which statement best describes the relationship between igneous and metamorphic rocks?
Metamorphic rocks are formed from melting igneous rocks.
O Metamorphic rocks and igneous rocks do not follow a rock cycle
Igneous rocks must go through the sedimentary process to change into metamorphic rocks.
Igneous rocks are chemically changed into metamorphic rocks because of high temperature and pressur
Answer:
Igneous rocks must go through the sedimentary process to change into metamorphic rocks. Igneous rocks are chemically changed into metamorphic rocks because of high temperature and pressure. Metamorphic rocks are formed from melting igneous rocks. Metamorphic rocks and igneous rocks do not follow a rock cycle.
Explanation:
hope this helps!
Answer:
C
Explanation:
It's igneous rocks must go through the sedimentary process answer thing
What is DNA fingerprinting?
FORENSICS
Answer:
It is a method used to identify a suspect.
Explanation:
DNA fingerprinting is a method used to identify an individual from a sample of DNA by looking at unique patterns in their DNA.
Please help... its due today and my teacher isn't explaining very good I have 100 points will give 40 to you a brainliest and thanks answers are at the bottom but I need the work done also
Answer:
2Na2O2 + 2H2O → 4NaOH + O2 is the balanced ver of Na2O2 + H2O - NaOH + O2
Explanation:
Which equation represents a conservation of atoms?
1.
2Fe + 202 → Fe2O3
2.
2Fe + 302 → Fe2O3
3.
4Fe + 202 → 2Fe2O3
4.
4Fe + 302 → 2Fe2O3
From the options, the reaction that shows the conservation of atoms is 4Fe + 302 → 2Fe2O3.
What is conservation of atoms?The idea of the conservation of atoms is that the number of atoms on the right hand side is equal to the number of atoms on the left hand side.
In this case, we have to a reaction equation which is balanced which is 4Fe + 302 → 2Fe2O3.
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1. You are stirring a bowl of hot soup with a metal spoon. The spoon starts to feel warmer
A) conduction
B) convection
C) radiation
You are stirring a bowl of hot soup with a metal spoon. The spoon starts to feel warmer, this represents conduction.
What is conduction?One of the three primary methods for the transfer of heat energy is conduction. Radiation and convection are the other two methods through which heat is transferred. Heat energy is transferred through the mechanism of conduction when nearby atoms or molecules collide.
In liquids and solids where particles are more closely spaced, conduction happens more easily than in gases, wherein particles are more widely spaced. When there is a significant temperature differential between both the substances that are in contact, the rate of energy transfer through conduction is increased. You are stirring a bowl of hot soup with a metal spoon. The spoon starts to feel warmer, this represents conduction.
Therefore, the correct option is option A.
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Please help me A 0.200 M NaOH solution was used to titrate a 18.25 mL HE
solution. The endpoint was reached after 31.20 mL of titrant
were added. Find the molar concentration of the original HF
solution.
The molar concentration of the original HF solution : 0.342 M
Further explanationGiven
31.2 ml of 0.200 M NaOH
18.2 ml of HF
Required
The molar concentration of HF
Solution
titration formula
M₁V₁n₁=M₂V₂n₂
n=acid/base valence (amount of H⁺/OH⁻, for NaOH and HF n =1)
Input the value :
[tex]\tt 0.2\times 31.2=M_2\times 18.25\\\\M_2=0.342[/tex]
What gas makes up the majority of the Earth's atmosphere
Answer: Nitrogen
Explanation: The atmosphere is actually mostly Nitrogen at 78% not oxygen.
Which states of water can you find in your home? Explain.
Answer:
all
Explanation:
water vapor is everywhere
ice is in the freezer and hopefully you drink water.
How many moles of NaCl are present in 2.50 L of a 0.070 M solution?
a
2.8 x 10-2 moles of NaCl
b
35.7 moles of NaCl
c
1.75 x 10-4 moles of NaCl
d
0.175 moles of NaCl
Given :
Volume of NaCl solution 2.5 L .
Molarity of NaCl solution is 0.070 M .
To Find :
How many moles are present in the solution.
Solution :
Let, n be the number of moles.
We know, molarity is given by :
[tex]M = \dfrac{n}{V(in\ L)}[/tex]
So,
[tex]n = M \times V\\\\n = 0.070\times 2.5 \\\\n = 0.175\ moles[/tex]
Therefore, number of moles of NaCl is 0.175 moles.
If you heat a liquid and measure the temperature at which it vaporizes (or boils) you are measuring...
A.) an atomic property
B.) a physical property
C.) a chemical property
Answer:
I believe that it is B
Explanation:
Two important ways that energy is transported in the world around us is through
Explanation:
The two ways that energy can be transferred are by doing work and by heat transfer.
HURRY PLEASE!! An atomic physicist determines that an atom is composed of 8 positively charged particles and has a mass of 15 amu. Which is the best conclusion that can be drawn?
A)The atom has 7 neutrons and 8 protons.
B)The atom has 7 electrons and 8 protons.
C)The atom has 8 neutrons and 7 electrons.
D)The atom has 8 electrons and 7 protons.
⚠️HELP⚠️
Balance this equation
zinc ( s) + hydrogen sulfate (aq) hydrogen( (g) + zinc sulfate (aq) (hydrogen sulfate is a compound, not ion) +
Answer:
The balanced equation is :
Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g)
pls help me balance this equation
C8 H18 + O2 CO2 + H2O
Answer:
2C8H18 + 25O2 → 16CO2 + 18H2O
Explanation:
Explain Joule's law in your own words. pls help
Answer:
Joules first law is a law that expresses the relatioship between heat that is generated and the current flowing heat thats through a conductor. The second law says that internal energy is independent of volume and pressure, depending only on temperature!
Explanation:
Which of the following atoms has 12 protons?
A) Mg
B) He
C) F
D) Li
Mg
...
.....
......
..............
Giving brainliest please help with this question
Answer:
B
Explanation:
Cells get chemical energy from food through a series of chemical reactions called _______________
Answer: oxidation reactions
Explanation:
A gas has a volume of 25.0 mL when under a pressure of 525 mmHg. What is the new pressure when the volume has been increased to 86.2 mL while temperature remains constant?
Answer:
152.26 mmHg
Explanation:
pv=p'v'
525× 25=p'×86.2
p'=525×25÷ 86.2
p'=152.26
How many formula units are in 2.5 moles of NaCl?
Answer: 1.5 x 10 24
Explanation:
One mole of NaCl contains 6.022 x 1023 NaCl formula units
In 2.5 moles of NaCl there will be basically 5 moles of ions as per the given data.
What is a compound?A material created by joining two or more distinct elements chemically in science.
A compound in chemistry is a material comprised of two or more separate chemical elements mixed together in a certain proportion.
Chemical connections that are challenging to break are created when the elements interact with one another.
2.5 mol of NaCl contains 5 moles of ions. This is due to the fact that 1 mol of NaCl contains 2 mol of ions, so you must multiply the molecular weight of the molecule by two to obtain the number of ions.
Thus, the answer is 5 moles.
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CO2 + H20 ----> C6H1206 + 02
*
14. What are the reactants of the reaction?
Explanation:
[tex]CO _{2} \: and \: H _{2} O[/tex]
Reactants must be on the left hand side of the reaction
Science and technology are different, yet related, fields of study. Which action is best classified as science?
A.
making a prosthetic leg to help a person walk
B.
building houses that can withstand strong earthquakes
C.
designing a faster type of computer
D.
analyzing cells of a newly discovered species
Answer:
Option D
Explanation:
analyzing cells is something I'm doing in science class right now!
Hope this helped, have a nice day! :)
Answer:
Science and technology are different, yet related, fields of study. Which action is best classified as science?
Explanation:
How would you balance this chemical equation?
Answer:
CH4 + 4Cl2 ===> CCl4 + 4HCl
Explanation:
If you are having trouble understanding how to balance equations, use chemical equation calculators and they tell you step by step.
How many different elements are involved in the chemical reaction shown
Ca+2H2O>ca(OH)2+H2
Explanation:
1.ca
2.H
3.O
.................
Did I get 6 and 7 correct or no?
Answer:
Yes
Explanation:
Answer: both are correct
Explanation:
In the reaction
Fe2O3 + 3 CO --> 2 Fe + 3 CO2,
What is the total number of moles of CO used to produce 112 grams of iron?
Answer:
3 moles of CO are needed
Explanation:
Given data:
Number of moles of CO used = ?
Mass of Fe produced = 112 g
Solution:
Chemical equation:
Fe₂O₃ + 3CO → 2Fe + 3CO₂
Number of moles of Fe:
Number of moles = mass/ molar mass
Number of moles = 112 g/ 55.85 g/mol
Number of moles = 2.00 mol
Now we will compare the moles of iron and CO.
Fe : CO
2 : 3
Thus, 3 moles of CO are needed.
Is it true that the direct transfer of thermal energy between particles of matter that are touching is called conduction.
Choose the statement that correctly describes how elements and compounds are related.
Multiple choice question.
A compound is a substance in which the atoms of two or more elements are physically combined in variable proportions.
An element is a substance in which the atoms of two or more compounds are chemically combined in a fixed proportion.
A compound is a substance in which the atoms of two or more elements are chemically combined in a fixed proportion.
Answer:
A compound is a substance in which the atoms of two or more elements are chemically combined in a fixed proportion.
Explanation:
The correct answer is that a compound is a substance in which the atoms of two or more elements are chemically combined in a fixed proportion.
A compound is a substance composed of two or more kinds of atoms joined together in a definite grouping.
The properties of a compound are distinct and different from those of the individual elements that are combined in its make - up.
There are several millions of compounds known.
An element is a distinct substance that cannot be split-up into simpler substances. They are made up of only one kind of atom.
