any help would be much appreciated, i'm being timed :( i'll mark brainliest and 5 star
Answer:
GROUP 16
Explanation:
Answer:
group 2
Explanation:
50 POINTS?!!!!!!
2 KClO3 (s) → 2 KCl (s) + 3 O2 (g)
how many atoms are in 3.2 moles of KCl?
Answer:
If u use math why It will give u the answer like 3x3=9
Explanation:
I Whoever answers correct I’ll give you a Brainly
Answer:
D. An endothermic reaction absorbs energy, and an exothermic reaction releases energy.
Explanation:
Endothermic reactions absorb things such as heat while exothermic reaction would do the opposite and release the heat or energy.
Which statements accurately describe volume? Check all that apply.
1. Volume is a physical property of an object.
2. Volume is measured using a balance.
3. The volume of a solid changes with the shape of the container.
4. One unit of volume is the milliliter.
5. Liquids and solids have constant volume.
Answer:
the answer is the number three
Answer: the right answer is 1,4&5
what is the molecular formula of zinc nitrate by criss cross method
Explanation:
zinc nitrate
zn no3
valency :
2 -1
So, zn(no3)2
Nitroglycerin contains 60% as many carbon atoms as hydrogen atoms, three times as many oxygen atoms as nitrogen atoms, and the same number of carbon and nitrogen atoms. The number of moles in 1.00g of nitroglycerin is 0.00441. What is the molecular formula?
Answer:
C₃H₅N₃O₉
Explanation:
Molar mass of nitroglycerin (Ratio of mass and moles of the compound) is:
1.00g / 0.0041mol = 226.8g/mol
We can write the equations:
0.6H = C (1)
-60% as many carbon atoms as hydrogen atoms-
3N = O (2)
C = N
Using as basis the atoms of Carbon:
Carbon = 1
Nitrogen = 1
Oxygen = 3
Hydrogen = 1/0.6 = 1.67
A molecular formula has just whole numbers. This ratio of atoms times 3:
Carbon = 3
Nitrogen = 3
Oxygen = 9
Hydrogen = 5
C₃H₅N₃O₉. Molar mass of this formula is:
C = 12.01g/mol*3 = 36.03g/mol
H = 1.01g/mol*5 = 5.05g/mol
N = 14g/mol*3 = 42g/mol
O = 16g/mol*9 = 144g/mol
Molar mass:
36.03g/mol + 5.05g/mol + 42g/mol + 144g/mol = 227g/mol ≈ 226.8g/mol
That means molecular formula of nitroglycerin is:
C₃H₅N₃O₉The molecular formula of nitroglycerin is C₃H₅O₉N₃
Mass of nitroglycerin = 1.00 g
A number of moles of nitroglycerin = 0.0041 mol
It is required to calculate the molecular formula of nitroglycerin.
What is the empirical formula?An empirical formula tells us the relative ratios of different atoms in a compound.
The molecular formula of nitroglycerin can be estimated with the help of empirical formula.
The molar mass of nitroglycerin (Ratio of mass and moles of the compound) is:
1.00g / 0.0041mol = 226.8 g/mol
We can write the equations:
0.6H = C (1)
-60% as many carbon atoms as hydrogen atoms-
3N = O (2)
C = N
Using as basis the atoms of Carbon:
Carbon = 1
Nitrogen = 1
Oxygen = 3
Hydrogen = 1/0.6 = 1.67
A molecular formula has just whole numbers. This ratio of atoms times 3:
Carbon = 3
Nitrogen = 3
Oxygen = 9
Hydrogen = 5
C₃H₅N₃O₉.
Molar mass of this formula is:
C = 12.01g/mol*3 = 36.03g/mol
H = 1.01g/mol*5 = 5.05g/mol
N = 14g/mol*3 = 42g/mol
O = 16g/mol*9 = 144g/mol
Molar mass:
36.03g/mol + 5.05g/mol + 42g/mol + 144g/mol = 227g/mol ≈ 226.8g/mol
That means molecular formula of nitroglycerin is:
C₃H₅N₃O₉
To learn more about empirical formula, click here:
https://brainly.com/question/11588623
3. Two substances, both liquids, start at the same temperature. You transfer
the same amount of energy out of both liquids, but substance 1 becomes a
solid before substance 2. Which substalice has a stronger molecular
attraction?
A Substance 1
B Substance 2
Pleas help I will give you Brainlyest
Answer:
Substance 1
Explanation:
Because if it becomes a solid BEFORE the other it means that the structure is more sound than the other substance. and if you add heat to something that becomes a solid it means it will come closer
I Hope this helps <3 and again i don't need the crown
Changes that occur during a chemical reaction are represented by a(n) _?_.
Answer:
Explanation:
What does it mean by are represented by is it like cells when things can a cell molecule?
What is true about matter in a chemical reaction? *
None of these statements are true.
Matter can be created or destroyed.
Matter can sometimes be created or destroyed.
Matter cannot be created or destroyed.
Answer:
the last option,matter cannot be created or destroyed
Which term refers to the ability to do work?
energy
power
force
motion
Answer:
Energy
Explanation:
Answer: energy
Explanation:just learned it last month
what is the chemical formula of tetranitrogen tetrabromide?
ANSWER ASAP!
How does a combustion reaction form?
How many significant digits would you report an answer to if you divided 2.654 by 3.2?
answer choices
1
2
3
4
Answer:1
Explanation:
Balance the following equation
a Gardner crosses a plant with red flowers with one with white flowers. each plant is pure for its trait for flower color
if the gene for the flower color shows incomplete dominance what kind of coloring will the flower on the offspring plants most likely have
a. white and red
b. red only
c. pink only
d. white pink
Answer:
Pink only
Explanation:
AP3X
How are organisms organized from simple to complex?
Answer:
The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere
Explanation:
Answer:
i do believe that the answer above mine is correct
Explanation:
i know this was a few months ago but i think that person deserves brainliest
hope everyone is having an amazing day <3
7.62 x 10^23 molecules of CO2 are contained in a tire. How large is the tire (in liters)?
Answer: 7.62e+23
Explanation:
Which energy transformation produces electricity and is least likely to negatively impact the environment?
A) Generating electricity from a natural gas-fired power plant
B) Generating electricity from a coal-fired power plant
C) Generating electricity from a nuclear power plant
D) Generating electricity from a solar panel system
Hello!
The answer to this question is: D) Generating electricity from a solar panel system.Thank you for asking this question!
It would be greatly appreciated if you thanked me and marked me as the brainliest!
Have an amazing day.
The energy transformation which produces electricity and is least likely to
negatively impact the environment is generating electricity from a solar
panel system.
Generating electricity from solar panel involves the use of solar energy from
the sun to generate electricity . This type of energy doesn't emit any type of
harmful radiation or release toxic compounds into the atmosphere which
makes it the least likely to negatively impact the environment.
Other options emit any type of harmful radiation or release toxic compounds
into the atmosphere which makes option D the most appropriate.
Read more on https://brainly.com/question/11867576
Sodium is a soft, white metal that reacts violently with water. Chlorine is a poisonous yellow-green gas. During the chemical reaction between sodium and chlorine, table salt is produced. Which of the following statements correctly compares and contrasts the reactants with the resulting products used in a chemical equation?
A. The reactants are dangerous and the product can be eaten
B. The reactants and the products observe the law of conservation of mass
C. The reactants are a solid and a gas and the product is a gas
D. The reactants and the products are the same color
Answer:
B. The reactants and the products observe the law of conservation of mass
Explanation:
The reaction equation is given as:
2Na + Cl₂ → 2NaCl
Such a chemical reactions usually obeys the law of conservation of mass. The law states that "in a chemical reaction, matter is neither created nor destroyed but bonds are rearranged".
So, the most correct thing is that reactants and products observe the law of conservation of mass. The number of atoms on both sides of the expression will be the same. Therefore, option B is correct.Which of the following redox conditions will produce a spontaneous reaction?
A. The voltage of the reduction half-reaction is negative.
B. The voltage of the reduction half-reaction is positive.
C. The sum of the voltages of the half-reactions is negative.
D. The sum of the voltages of the half-reactions is positive.
Answer:
D. The sum of the voltages of the half reactions is positive.
Explanation:
It's correct on apeex
The statement, that describes the redox conditions will produce a spontaneous reaction is "the sum of the voltages of the half-reactions is positive."
What is spontaneous reaction?A spontaneous reaction is one that favors the creation of products under the conditions of the reaction. It can move in a specific direction without being propelled by an external source of energy. If the standard electrode potential for the redox reaction is positive, the reaction is spontaneous.
If [tex]E^{0}[/tex] (redox reaction) is positive, the reaction will move onward (spontaneous). The redox conditions will cause a spontaneous reaction, and the sum of the half-reaction voltages is positive. Hence the correct option is D.
Learn more about spontaneous reaction here
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Which of the following is an example of a chemical change?
a. freezing water to make ice.
b. a firework exploding.
c. breaking a glass bottle.
d. melting gold jewelry to make a gold bar.
Answer:
b. a firework exploding
Explanation:
True or False: If you find the percent by mass of all of the elements in a compound, it will always add up to exactly 100.00%
Answer: true
Explanation: because Mass percentage composition is found by calculating a fraction of the total mass by each element present in a compound. The whole compound itself would equal one or 100% in all the elements that make it up would only be a fraction, so it will always have to add up to 100%
A solution has a density of 1.50 g/mL. How many grams are needed to obtain 10.0 mL of solution?
Answer:
15 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volume
From the question we have
mass = 1.5 × 10
We have the final answer as
15 gHope this helps you
5. An anion of carbon C-4 has how many electrons?
a. 6
b. 8
C. 9
d. 10
Answer:
A.6
Explanation:
An atom of carbon can share four electrons. Carbon has a total of six electrons, with two in the first orbital and four in the second orbital.
As we approach fall, the trees begin to drop their leaves. If a leaf, with a mass of 0.00006 kg, drops 3.66 meters from the top of a tree and the acceleration due to gravity is 9.81 m/s2. Calculate the force at which the leaf will hit the ground.
(F = m * a)
Weathering, erosion, and deposition act together in a cycle that wears down
and builds up Earth's surface. true or false???
Answer:
The answer is true. Hope this helps
How do I balance these?
Answer:
[tex]1S_{8} +12O_{2}=8SO_{3}[/tex]
[tex]2Al+6HCl=2AlCl_{3} +3H_{2}[/tex]
[tex]2Fe+3Cl_{2}=2FeCl_{3}[/tex]
[tex]2K+1Cl_{2}=2KCl[/tex]
Explanation:
Assignment Summary For this assignment, you will construct a scientific model of the water cycle to show how water is recycled through an ecosystem. Once you have drawn your model on a poster board, you will write one to two paragraphs explaining how water is transferred within and between organisms and the environment. Background Information Water is a very important compound. Organisms need water to carry out life-maintaining processes such as growth and development. Without water, living things will not survive. Water continually flows among the atmosphere, land, water, and living organisms. This process, called the water cycle, allows water to be recycled as it moves through Earth’s spheres. Materials Assignment Instructions Step 1: For this project, you are expected to submit the following: 1. Your model of the water cycle 2. One to two typewritten paragraphs describing the water cycle Step 2: Prepare for the project. a) Read through the guide before you begin so you know the expectations of this project. Pay particular attention to the instructions you need to follow to create a model on your poster board. b) If anything is not clear to you, be sure to ask your teacher. Step 3: Gather materials for the model. a) Start with a blank poster board. Be sure to put your name on it. b) You may either draw the parts of the water cycle or print images to construct a model on your poster board. Gather any drawing tools that you will need, or print any images you want to use. Step 4: Create a model of the water cycle. a) Your model should include bodies of water such as lakes and oceans, organisms, air, and land. b) Draw arrows indicating how water moves within an ecosystem and between organisms and their environment. Be sure to include the Sun and gravity in your model. c) Include short phrases on your poster that summarize what occurs at each stage of the water cycle. Large poster board Markers, crayons, or colored pencils Scissors Glue or tape Student Guide (continued) Step 5: Write a paragraph describing the water cycle. a) Type one to two paragraphs describing the full water cycle. Be sure to use full sentences and proper grammar.
Answer:
the water cycle is a system that goes through evaporation then the water goes into the clouds and rains down as preparation
Explanation:
thats the cycle but if I were u I would do more Reasearch
Help please! What is the number that can balance the equation KClO3 → 2KCl + 3O2?
Answer:
2KClO3 → 2KCl + 3O2 is balanced equation
Explanation:
What Phase is water at 120 degrees Celsius?
