Answer:
Empirical formula is CH₃Cl.
Explanation:
Given data:
Percentage of hydrogen = 6%
Percentage of carbon = 24%
Percentage of chlorine= 70%
Empirical formula = ?
Solution:
Number of gram atoms of H = 6/ 1 = 6
Number of gram atoms of C = 24 /12= 2
Number of gram atoms of Cl = 70/ 35.45 = 2
Atomic ratio:
C : H : Cl
2/2 : 6/2 : 2/2
1 : 3 : 1
C : H : Cl = 1 : 3 : 1
Empirical formula is CH₃Cl.
Answer:
CH3Cl
Explanation:
a-p-e-x
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.
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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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
The density of carbon tetrachloride is 1.59 g/ml. Calculate the volume of 26.4 grams of the liquid.
Answer:
16.6 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\ [/tex]
From the question we have
[tex]volume = \frac{26.4}{1.59} \\ = 16.60377...[/tex]
We have the final answer as
16.6 mLHope this helps you
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:
Which element below is most reactive ?
A. Oxygen
B. Hydrogen
C. Chlorine
D. Neon
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:
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.
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:
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!
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
Solutions of lead(II) nitrate and potassium iodide were combined in a test tube.
Write a net ionic equation for the reaction between lead(II) nitrate and
potassium iodide.
Answer:
Explanation: When solutions of potassium iodide and lead nitrate are combined?
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. Chemical Equation Balancer Pb(NO3)2 + KI = KNO3 + PbI2. Potassium iodide and lead(II) nitrate are combined and undergo a double replacement reaction. Potassium iodide reacts with lead(II) nitrate and produces lead(II) iodide and potassium nitrate. Potassium nitrate is water soluble. The reaction is an example of a metathesis reaction, which involves the exchange of ions between the Pb(NO3)2 and KI. The Pb+2 ends up going after the I- resulting in the formation of PbI2, and the K+ ends up combining with the NO3- forming KNO3. NO3- All nitrates are soluble. ... (Many acid phosphates are soluble.)
The net ionic equation for the reaction that occurs when solutions of lead(II) nitrate and potassium iodide are combined in a test tube is:
Pb²⁺(aq) + 2 I⁻(aq) ⇒ PbI₂(s)
Solutions of lead(II) nitrate and potassium iodide were combined in a test tube. This is a double displacement reaction. The complete ionic equation is:
Pb²⁺(aq) + 2 NO₃⁻(aq) + 2 K⁺(aq) + 2 I⁻(aq) ⇒ 2 K⁺(aq) + 2 NO₃⁻(aq) + PbI₂(s)
Spectator ions are those that appear both in the reactants and in the products. They do not participate in the reaction, so they do not appear in the net ionic equation. The net ionic equation is:
Pb²⁺(aq) + 2 I⁻(aq) ⇒ PbI₂(s)
The net ionic equation for the reaction that occurs when solutions of lead(II) nitrate and potassium iodide are combined in a test tube is:
Pb²⁺(aq) + 2 I⁻(aq) ⇒ PbI₂(s)
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10 To draw a perfect circle, you'll need: A A protractor B. A sextant С A compass D A spirograph 10 of 10
Answer:
B
Explanation:
Two quick google searches later I grace you with the google has bestowed upon me
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:
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.
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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In order to make 4 cups of tea, 1.00 kg of water is heated from 22.0 oC to 99.0 oC. How much energy is required? 1) One point for how you would set up the problem and correct answer 2) 1 point for explaining any conversions 3) One point for explaining if this is endothermic or exothermic and why
Answer:
[tex]322014\ \text{J}[/tex]
Explanation:
m = Mass of water = 1 kg
c = Specific heat of water = [tex]4182\ \text{J/kg}^{\circ}\text{C}[/tex]
[tex]\Delta T[/tex] = Change in temperature = [tex](99-22)^{\circ}\text{C}[/tex]
Heat or energy required in the system is
[tex]Q=mc\Delta T\\\Rightarrow Q=1\times 4182\times (99-22)\\\Rightarrow Q=322014\ \text{J}[/tex]
The energy required is [tex]322014\ \text{J}[/tex]
Unit of energy is Joule
[tex]mc\Delta T=\text{kg}\times \dfrac{\text{J}}{\text{kg}^{\circ}\text{C}}\times\ ^{\circ}\text{C}=\text{J}[/tex]
As heat is being absorbed by the water it is endothermic in nature.
Can someone help me with this chemical or physical change hw
Answer:
For some reason all of those look like they are true
Which of the following is an example of a chemical change?
25 points
A. water evaporating
B. carbon joining with oxygen to form carbon dioxide
C. ice cream melting
D. salt dissolving into water to form a solution
Answer:
A. water evaporating. it must be there.
Which of the following is true about fossils?
A.
Fossils found in lower layers of sedimentary rock are
as old as fossils found in upper layers of sedimentary rock.
B.
Fossils found in lower layers of sedimentary rock are
older than fossils found in upper layers of sedimentary rock.
C.
Fossils found in upper layers of sedimentary rock are
older than fossils found in lower layers of sedimentary rock.
D.
The relative age of fossils cannot be determined from their
position in sedimentary layers.
Answer:
The answer is B!
Explanation:
if they are lower this means that they have been on the ground longer there for older
The statement that is true about fossils is that fossils found in lower layers of sedimentary rock are older than fossils found in upper layers of sedimentary rock.
What are sedimentary rocks?
They are the types of rocks which are formed as a result of accumulation of minerals or organic particles at the surface of the earth.Sedimentation is the name given to a collective process which cause the particles to settle.
The study of sedimentary rocks is useful in civil engineering and as important sources of coal, fossil fuels and ores.The color of sedimentary rock is often determined by iron content and sometimes due to the presence of organic matter.
They are classified based on origin in to 4 types which are clastic, biochemical ,chemical and other sedimentary rocks.While based on composition they are classified as siliciclastic,carbonate ,evaporite,organic rich,siliceous ,iron-rich and phosphatic sedimentary rocks.
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Which type of window would adds the most insulation to your home? *
Open Window
Single Pane Window
Double Pane Window
Slightly Cracked Window
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.
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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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:
Organize the types of radiation from the largest particles to the smallest.
gamma, beta, alpha
alpha, gamma, beta
gamma, alpha, beta
beta, alpha, gamma
beta, gamma, alpha
alpha, beta, gamma
Answer:
The answer is alpha, beta, and gamma
Explanation:
I took this quiz, and that answer was correct.
(Good luck on primavera my G)
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
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
In an experiment, a scientist adds radioactive oxygen to different parts of the environment in which he grows his plants. Based on the chemical equation, adding radioactive oxygen in which component would produce radioactive glucose? Choose the correct answer.
A. air
B. Water
C. Energy
D. Fertilizer
Answer:
D
Explanation:
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
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