Answer:
Hey mate here is your answer. Hope it helps you.
Explanation:
This equation is not balanced. The balanced equation is CH4+ 2O2———-> CO2+ 2 H2O.
Solutions of lead(ii) nitrate and potassium iodide were combined in a test tube. write a formula equation for the reaction.
Answer: yellow
When you mix solutions of lead (II) nitrate and potassium iodide. The precipitate is yellow in colour and the compound is lead (II) Iodide. Pb (NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq). Yes, it is a double displacement reaction.
Explanation: The lead nitrate solution contains particles (ions) of lead, and the potassium iodide solution contains particles of iodide. When the solutions mix, the lead particles and iodide particles combine and create two new compounds, a yellow solid called lead iodide and a white solid called potassium nitrate. When a solution of potassium iodide is added to a solution of lead nitrate taken in a test tube, the precipitation of a yellowish solid is observed. This yellowish solid is lead iodide. Potassium nitrate is formed along with lead iodide. When lead nitrate is mix with potassium iodine, a precipitation reaction occurs and yellow precipitate of lead iodide is formed.
In 4-5 sentences, explain the component's of the universe. How would you arrange these components from simple to complex?
Answer:
The universe is composed of gases like nitrogen, oxygen, and made of atoms
Explanation:
I would combine all of these simple gases to create more complex components and life forms
Reaction rate describes the blank
of a chemical reaction
Answer:
Explanation:
Likewise, the rate of a chemical reaction is a measure of how much reactant is consumed, or how much product is produced, by the reaction in a given amount of time. The rate of reaction is the change in the amount of a reactant or product per unit time.
Which type of window would adds the most insulation to your home? *
Open Window
Single Pane Window
Double Pane Window
Slightly Cracked Window
what happens to energy and temperature when molecules collide using DETAILS from the simulation.
Answer:
Molecules must collide in order to react. In order to effectively initiate a reaction, collisions must be sufficiently energetic ( kinetic energy ) to break chemical bonds; this energy is known as the activation energy.
Explanation:
Hope this helps!
A gas balloon has a volume of 106.0 liters when the temperature is 45.0 °C and the pressure is 740.0 mm of mercury. What will its volume be at 20.0 °C and 780 .0 mm of mercury pressure?
Answer:
New volume V2 = 92.7 Liter (Approx)
Explanation:
Given:
V1 = 106 l
T1 = 45 + 273.15 = 318.15 K
P1 = 740 mm
T2 = 20 + 273.15 = 293.15 K
P2 = 780 mm
Find:
New volume V2
Computation:
P1V1 / T1 = P2V2 / T2
(740)(106) / (318.15) = (780)(V2) / (293.15)
New volume V2 = 92.7 Liter (Approx)
The final volume will be 44.69 L
Initial volume V₁ = 106.0 L
Initial pressure P₁ = 740.0 mm of Hg
Initial temperature T₁ = 45.0⁰C
Final pressure P₂ = 780.0 mm of Hg
Final temperature T₂ = 20.0⁰C
It is required to calculate the final volume V₂
What is an ideal gas equation?
The ideal gas equation is formulated as:
PV = nRT.
In this equation, P refers to the pressure of the ideal gas, V is the volume of the ideal gas, n is the total amount of ideal gas that is measured in terms of moles, R is the universal gas constant, and T is the temperature.
Applying the ideal gas equation considering the gas inside the balloon to be ideal, to get the new volume.
So, from ideal gas law, we get,
[tex]\frac{PV}{T} = constant[/tex]
where P = pressure, V= Volume, T= temperature.
So,
[tex]\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}[/tex]
[tex]V_2 = \frac{P_1V_1T_2}{P_2T_1}[/tex]
On substituting the values;
[tex]V_2=\frac{106.0\times740.0\times20.0}{780.0\times45}[/tex]
V₂ = 44.69 L
Hence, The final volume will be 44.69 L
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Which cell is an animal cell
Answer: the eukaryotic cell
Explanation: Animal cells are typical of the eukaryotic cell, enclosed by a plasma membrane and containing a membrane-bound nucleus and organelles. Unlike the eukaryotic cells of plants and fungi, animal cells do not have a cell wall.
Calculate the mass of an object that is pushed with a force of 13 N and accelerates at 2.5 m/s2
a.5.2m/s2
b.5.2n
c.5.2kg
d.10kg
Can someone help me with this chemical or physical change hw
Answer:
For some reason all of those look like they are true
I REALLY NEED HELP PLZZZZZ!!!!!
In which part or parts of the electromagnetic spectrum are the seven colors of the rainbow found?
telemetry waves
television waves
visible light and television waves
visible light
Answer:
Visible Light
Explanation:
Answer:
I believe that the answer is visible light
PLEASE HELP THIS IS DUE SOON
How many moles of oxygen atoms are present in 6.41×1025 molecules
of dinitrogen pentoxide (N2O5)?
1. 532 mol
2. 106 mol
3. 32 × 1025 mol
4. 266 mol
Answer:
I would say 3 but I not exactly sure
Plate tectonics to erosion why do earthquakes occur
Answer:
n California there are two plates - the Pacific Plate and the North American Plate. The Pacific Plate consists of most of the Pacific Ocean floor and the California Coast line. The North American Plate comprises most the North American Continent and parts of the Atlantic Ocean floor. The primary boundary between these two plates is the San Andreas Fault. The San Andreas Fault is more than 650 miles long and extends to depths of at least 10 miles. Many other smaller faults like the Hayward (Northern California) and the San Jacinto (Southern California) branch from and join the San Andreas Fault Zone.
The Pacific Plate grinds northwestward past the North American Plate at a rate of about two inches per year. Parts of the San Andreas Fault system adapt to this movement by constant "creep" resulting in many tiny shocks and a few moderate earth tremors. In other areas where creep is NOT constant, strain can build up for hundreds of years, producing great earthquakes when it finally releases.
Explanation:
A student measures the heights of four bean plants grown in different types of soil. The amount of water given to each plant is kept the same and they are placed in the same location. What is the independent variable?
Answer:
The independent variable here is the types of soil
Explanation:
An independent variable is the variable that is not affected by the outcome of other variables in a given experiment. This variable is the variable that is intentionally altered/changed (directly or indirectly) by the researcher in order/expected to produce a result for the experiment. Thus, the independent variable here is the types of soil. This is because the soil was intentionally changed/varied by the researcher and it's expected to determine the heights of the bean plants grown.
How many magnesium atoms are in the product
Answer: Im not sure if you are doing this in your class.
Explanation:
So... for the element of MAGNESIUM, you already know that the atomic number tells you the number of electrons. That means there are 12 electrons in a magnesium atom. Looking at the picture, you can see there are two electrons in shell one, eight in shell two, and two more in shell three
really simple answer if you know please
A 400 kg box and a 200 kg are to pushed across a horizontal table, the exact same distance with the exact force. Which box will have the most work done on it? Which box will get to the end first? Explain both of your responses.
1. Box A
2. Box B
Explanation:
Box A has the greatest mass. As mass is directly proportional to Work. ie. Work= Force * Distance and Force= mass* acceleration. So,
Work = Mass* Acceleration * Distance
Box B reaches the end first as according to newtons second law, acceleration is inversely proportional to mass.Since, box B has the less mass, it will have higher acceleration and cover more distance.(Distance is directlyproportionalto speed)
What is the name of the process shown in the above picture?
A intercellular communication
B meiosis
C diffusion or simple diffusion
D osmosis
Answer:
C is the answer to the question
Answer:
C. Diffusion or simple diffusion
Explanation:
I took the test
Positive oxidation number suggest that the element wants to ____ (lose/gain) electrons?
Answer:
lose
Explanation:
its lose because if its positive, assume the electron is a person who has already eaten, theyre full and dont want more, therefore they would want to lose the weight, so its lose.
Please help ill mark brainliest please
Answer:
The moons orbit around planets.
Mass is the force that holds people ans objects to earths surface.
Explanation:
Answer:
A, C, E, G
Explanation:
I think they are your answer
Can I have brainliest
Help with this please
Is tap water electrolytes or nonelectrolytes?
Is sugar solution electrolytes or nonelectrolytes?
Is lactic acid solution electrolytes or nonelectrolytes?
Answer:
electrolytes yes it is
Explanation:
i'm built different
Does the Earth stay in one place throughout the year? If not, describe its motion and location in the solar system?
I NEED HELP THIS DUE I 2 HOURS
There are two kinds of motion that earth possess, one is rotation and other is revolution. Therefore, earth does not stay in one place throughout the year. The earth revolves and spins around the sun. The Earth is situated between Venus and Mars.
What is rotation?The motion of the earth around its axis is known as rotation. Revolution refers to the motion of the earth about the sun in a fixed route or orbit. The earth's axis, which is an invisible line, forms a 6612° angle with its planet's orbit.
No, the earth does not remain stationary throughout the year. The Earth revolves around the sun. The earth revolves and spins around the sun. The Earth is situated between Venus and Mars, therefore it is neither too hot nor too cold.
Therefore, earth does not stay in one place throughout the year. The earth revolves and spins around the sun. The Earth is situated between Venus and Mars.
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What are the "relative mass" and "actual mass" of the electron, proton, and neutron?
Explanation:
Protons are the positively charged particles in an atom
Neutrons do not carry any charges
Electrons carry negative charges
Particles Charge Actual Mass Relative mass compared to proton
Electrons -ve 9.11 x 10⁻³¹kg [tex]\frac{1}{1840}[/tex]
Protons +ve 1.67 x 10⁻²⁷kg 1
Neutrons 0 1.68 x 10⁻²⁷kg 1
How is Earth's surface most likely to change when a river flows across a steep landscape over time?
It will form into a mountain due to deposition.
Physical weathering will create a channel with curvy loops.
A valley will be carved out due to erosion.
A lake will form due to chemical weathering.
Answer:c
Explanation:
A valley will be carved out due to erosion.
Answer:
it was c
Explanation:
Which two substances are reactants in the following chemical equation? CO+H2O -> CO2+H2
A. H2O
B. H2
C. CO2
D. CO
Answer:
a. and d.
Explanation:
H₂O and CO are reactants in the following chemical equation which are water and carbon monoxide respectively.
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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Explain why the sizes of a metal atom and its ion are different.
Answer: the covalent atomic radius is half the internuclear distance in a molecule with two identical.
Explanation:
Which of these form an ionic bond
Answer:
the second 1
Explanation:
In order to turn oxygen gas into a liquid, it must be ___________.
A. turned into a solid first
B. cooled down
C. heated up
D. mixed with water
Answer:
B
Explanation:
what causes the common cold?
Answer: Colds are caused by viruses and are easy to treat. They are usually caused by germs too.
Explanation:
Answer:
Answer: Colds are caused by viruses and are easy to treat. They are usually caused by germs too.v
Explanation:
How did Devils Tower form, and why is it so much
taller than the surrounding landscape?
Answer:
When the Tower formed around 50 million years ago, it was one to two miles below the Earth's surface. The harder igneous rock of the Tower is more resistant to erosion, and the gray columns of Devils Tower began to stand out above the surrounding landscape.
Explanation:
Consider the chemical equations shown here.
Upper N Upper O (g) + Upper O Subscript 3 Baseline (g) right arrow Upper N Upper O Subscript 2 Baseline (g) + Upper O Subscript 2 Baseline (g) delta Upper H Subscript 1 Baseline = negative 198.9 kilojoules. StartFraction 3 Over 2 EndFraction Upper O Subscript 2 Baseline (g) right arrow Upper O Subscript 3 Baseline (g) delta Upper H Subscript 2 Baseline = 142.3 kilojoules. Upper O (g) right arrow one half Upper O Subscript 2 Baseline (g) delta Upper H Subscript 3 Baseline = negative 247.5 kilojoules.
What is Delta.Hrxn for the reaction shown below?
Upper n upper O (g) plus upper O (g) right arrow upper N upper O subscript 2 (g).
Answer:
-304.1
Explanation:
Just took it on Edge 2020
The enthalpy change for the target reaction is obtained as -304.1 kJ.
What is Hess law?The Hess law of constant heat summation states that; the heat of reaction can be obtained as the sum of the heat of several reactions.
In this case, the enthalpy change for the target reaction can be identified as; -198.9 + 142.3 + (-247.5) = -304.1 kJ.
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How many moles of hydrochloric acid does
1.505x10^24 atoms of hydrochloric acid make?
Answer:
2.499 mol HCl
General Formulas and Concepts:
Chemistry - Atomic Structure
Using Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:
Step 1: Define
1.505 × 10²⁴ atoms HCl (Hydrochloric acid)
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
[tex]1.505 \cdot 10^{24} \ atoms \ HCl(\frac{1 \ mol \ HCl}{6.022 \cdot 10^{23} \ atoms \ HCl} )[/tex] = 2.49917 mol HCl
Step 4: Check
We are given 4 sig figs. Follow sig fig rules and round.
2.49917 mol HCl ≈ 2.499 mol HCl