Answer:
Explanation:
The nucleus of an atom contains neutrons and protons bonded tightly together. The same chemical element can have a different number of neutrons and still be the same element.
Help please! What is the number that can balance the equation KClO3 → 2KCl + 3O2?
Answer:
2KClO3 → 2KCl + 3O2 is balanced equation
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
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:
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:
Find the number of moles of argon in 534 g
of Argon
Answer:
13.4 mol Ar
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisExplanation:
Step 1: Define
534 g Ar
Step 2: Identify Conversions
Molar Mass of Ar - 39.95 g/mol
Step 3: Convert
[tex]534 \ g \ Ar(\frac{1 \ mol \ Ar}{39.95 \ g \ Ar} )[/tex] = 13.3667 mol Ar
Step 4: Check
We are given 3 sig figs. Follow sig fig rules and round.
13.3667 mol Ar ≈ 13.4 mol Ar
Answer:
The number of moles in 452 grams of Argon is 13.31 moles.
Explanation:
What Phase is water at 120 degrees Celsius?
Balance the following equation
ANSWER ASAP!
How does a combustion reaction form?
Please help its easy but i don't feel like doing it
Looking at the hills for the drawing of the roller coaster above complete the following statements with the correct answers.
At Point___ will have the most potential energy (the most ability to do work) because it is the (Highest or lowest) point on the coaster.
At point___ the roller coaster would have the most kinetic energy (energy of moving) because it will be going the (Fastest or slowest)
Answer:
first one is a second one is e
Explanation:
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.
A material that conducts electricity only at high temperatures.
A.Semiconductor
B.Compound
C.Luster
D.Brittle
Answer:
Semiconductor
Explanation:
Semiconductors conduct electricity as the temperatures increase.
Hope this helped.
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.
The membrane enclosing the nucleus of an eukaryotic cell is
called the nuclear ___
Answer:
It's called the nuclear envelope.
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.
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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)
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?!!!!!!
Which term refers to the ability to do work?
energy
power
force
motion
Answer:
Energy
Explanation:
Answer: energy
Explanation:just learned it last month
Which organelle captures sunlight and helps in food synthesis?
Answer:
Chloroplasts! :)
Explanation:
Hope this helps
1. Which of the following is Newton's First Law? *
A-An object in motion will stay in motion unless acted on by a balanced force.
B-An object at rest will stay at rest and an object in motion will stay in motion in the same speed and same direction unless acted on by an unbalanced force.
C-Moving objects will stay in motion forever
Answer:
B .............
hope it helps
Answer: B
Explanation:
How many moles of carbon are there in 5 g of carbon?
Answer:
0.416666667
Explanation:
number of moles= mass of sample ÷ molar mass
=5÷12
=0.41666667
The number of moles of carbon are there in 5 gram of carbon is 0.41 moles.
How do we calculate moles from mass?Moles of any substance will be calculated by using the mass by following the below equation:
n = W/M, where
W = given mass of carbon = 5g
M = molar mass of carbon = 12g/mol
On putting values, we get
n = 5 / 12 = 0.41 moles
Hence required moles of carbon is 0.41 moles.
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Using the VSEPR theory , what would the representation mean A central atom with 2 connected atoms atom with I lone pair of Jone pair of electrons electrons with 2 connected atoms to the central atom central atom with 2 pairs of lone pair none of these electrons and commected atom to the central
Answer:
The molecule has a bent geometry
Explanation:
Let us look again at the principles of VSEPR theory. The shape of a molecule depends on the number of electron pairs that surround the valence shell of the central atom in the molecule.
Lone pairs distort the molecular geometry away from what is expected on the basis of VSEPR theory.
The molecule described in the question has the form AEX2. Two substituents and one lone pair form three electron domains around the central atom. The expected geometry is trigonal planar but the observed molecular geometry is bent because of the lone pairs present.
Calculate the number of milliliters of 0.440 M KOH required to precipitate all of the Fe2+ ions in 187 mL of 0.692 M FeSO4 solution as Fe(OH)2. The equation for the reaction is: FeSO4(aq) + 2KOH(aq) Fe(OH)2(s) + K2SO4(aq)
Answer:
588.2 mL
Explanation:
FeSO₄(aq) + 2KOH(aq) → Fe(OH)₂(s) + K₂SO₄(aq)First we calculate how many Fe⁺² moles reacted, using the given concentration and volume of FeSO₄ solution (the number of FeSO₄ moles is equal to the number of Fe⁺² moles):
moles = molarity * volume187 mL * 0.692 M = 129.404 mmol Fe⁺²Then we convert Fe⁺² moles to KOH moles, using the stoichiometric ratios:
129.404 mmol Fe⁺² * [tex]\frac{2mmolKOH}{1mmolFeSO_4}[/tex] = 258.808 mmol KOHFinally we calculate the required volume of KOH solution, using the given concentration and the calculated moles:
volume = moles / molarity258.808 mmol KOH / 0.440 M = 588.2 mLhow to name iupac compounds
Answer:
In order to name organic compounds you must first memorize a few basic names. These names are listed within the discussion of naming alkanes. In general, the base part of the name reflects the number of carbons in what you have assigned to be the parent chain. The suffix of the name reflects the type(s) of functional group(s) present on (or within) the parent chain. Other groups which are attached to the parent chain are called substituents.
what is the molecular formula of zinc nitrate by criss cross method
Explanation:
zinc nitrate
zn no3
valency :
2 -1
So, zn(no3)2
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Which of these is a characteristic of warm air? (5 points)
a It transfers energy through radiation.
b Its molecules are far apart.
c It sinks due to convection.
d It cools the land below i
Answer:
B.
Explanation:
The air molecules of warm air has higher energy. It causes them to move away from each other
what is the chemical formula of tetranitrogen tetrabromide?
How do magnetic stripes show the history of Earth's magnetic field?
A. As you move away from an ocean ridge, the rocks get older.
B. As you move away from a coast, the rocks get younger.
C. As you move down through the seafloor, rocks get older.
D. As you move eastward along a continent, rocks get older.
The way that magnetic stripes show the history of the Earth's magnetic field is A. As you move away from an ocean ridge, the rocks get older.
What do magnetic strips show of Earth's history ?By looking at how our planet's magnetic field changes throughout time, scientists may estimate the age of the seafloor. A geomagnetic reversal is the periodic reversal of the currents in the liquid core that generate the Earth's magnetic field. Throughout Earth's history, this has occurred frequently.
When researchers examined the seafloor's magnetic characteristics, they found normal and reversed magnetic stripes of varying widths. These magnetic patterns are symmetrical on both sides and parallel to the mid-ocean ridges.
Away from midocean ridges, they observed that the age of the bottom became progressively older.
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How many grams of O2 are in 1.51 x 1023 molecules?
Group of answer choices
8.00 g
0.251 g
4.00 g
16.0 g
Answer:
I think is c 4.00 g
Explanation:
that was my answer
What is responsible for the blue sky?
Answer:
The blue color of the sky is caused by the scattering of sunlight off the molecules of the atmosphere.
Explanation:
Answer:
sun shine
Explanation:
Sunlight reaches Earth's atmosphere and is scattered in all directions by all the gases and particles in the air. Blue light is scattered more than the other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time
How many grams are in 2.94 x 1017 atoms of Iron?
Answer:
8.677
⋅
10
8
g
Explanation:
