when sodium carbonate reacts with a dilute acid carbondioxide is produces
Answer: carbon dioxide
Explanation: a salt, carbon dioxide, and water are formed in this reaction
Sn + 2 H2SO4 → SnSO4 + SO2 + 2 H2O If 219.65 grams of SnSO4 are produced, how many moles of H2SO4 were reacted?
Answer:
2.05moles
Explanation:
The balanced chemical equation in this question is as follows;
Sn + 2H2SO4 → SnSO4 + SO2 + 2H2O
Based on the above equation, 2 moles of H2SO4 reacted to produce 1 mole of SnSO4
However, the mass of SnSO4 produced is 219.65 grams. Using mole = mass/molar mass, we can find the number of moles of SnSO4 produced.
Molar mass of SnSO4 where Sn = 118.7, S = 32, O = 16
= 118.7 + 32 + 16(4)
= 150.7 + 64
= 214.7g/mol
mole = 219.65/214.7
mole = 1.023mol
Therefore, if 2 moles of H2SO4 reacted to produce 1 mole of SnSO4
1.023 mol of SnSO4 produced will cause: 1.023 × 2/1
= 2.046moles of H2SO4 to react.
How many moles of helium are needed to fill a balloon to a volume of 6.3 L at 28 °C and 320
mmHg?
Round answer to 0.01 decimals
Answer:
.11 mol
Explanation:
Convert mmHg to atms by dividing by 760. Then multiply 6.3 by the atms and divide by .08206*(273+28) to get mol
A mixture of helium, nitrogen and oxygen has a total pressure of 756 mmHg. The partial
pressure of helium is 122 mmHg, and the partial pressure of nitrogen is 338 mmHg. What is the
partial pressure (in mmHg) of oxygen in the mixture?
Answer:
The partial pressure of oxygen in the mixture is 296 mmHg.
Explanation:
The pressure exerted by a particular gas in a mixture is known as its partial pressure. So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone.
This relationship is due to the assumption that there are no attractive forces between the gases.
So, in this case, the total pressure is:
PT=Phelium + Pnitrogen + Poxygen
You know:
PT= 756 mmHgPhelium= 122 mmHgPnitrogen= 338 mmHgPoxygen= ?Replacing:
756 mmHg= 122 mmHg + 338 mmHg + Poxygen
Solving:
756 mmHg - 122 mmHg - 338 mmHg = Poxygen
Poxygen= 296 mmHg
The partial pressure of oxygen in the mixture is 296 mmHg.
What are two different forms of a single gene called?
A.
traits
B.
factors
C.
alleles <<<
D.
chromosomes
Two different forms of a single gene are called 'alleles
Ms. Garcia's science students are studying scale models. For her science project, Sarah has decided to make a scale model of the solar system. Sarah conducted some research to help her with the diameters of the planets and Sun in her model and found the table you see above. If Sarah uses a marble for Earth that is 1cm in diameter how big would she make the Sun in diameter?
A) 1km
B) 1.9km
C) 100cm
D) 109cm
Answer:
D. 109 cm
hope this helped :)
The Sun in diameter would be 109cm
A light bulb has a resistance of 96.8 Ω. What current flows through the bulb when it is connected to a 120 V source of electrical energy?
Answer:
I = 1.23 A
Explanation:
Given that,
The resistance of the lightbulb, R = 96.8 Ω
Voltage, V = 120 V
We need to find the current flows through the lightbulb. Let the current be I. We can use the ohm's law to find it i.e.
[tex]V=IR\\\\I=\dfrac{V}{R}\\\\I=\dfrac{120}{96.8}\\\\I=1.23\ A[/tex]
So, the current flows through the bulb is 1.23 A.
n E Which is the electron configuration for zinc? O 1s22s22p3s23p64s23d8 O 1s22s22p 3s 3p64s+3d10 01s 2s 2p 3s 23p64523d10 0 1522s 2p 3s23p64533d10
The electronic configuration is used to explain the orbitals of an atom and it helps to determine the physical and chemical properties of the elements. The electronic configuration of zinc is 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰. The correct option is C.
What is electronic configuration?The distribution of electrons in the atomic orbitals is given by the electronic configuration. It is a standard notation in which all the electrons holding atomic subshells are arranged in a sequence. Each element has a unique electronic configuration.
The electronic configuration of an element can be written in two ways, in standard notation, and in condensed form. In the case of elements with larger atomic numbers, the electronic configuration becomes lengthy in standard notation. So in such cases condensed form is generally used.
In condensed form electronic configuration of zinc is [Ar] 3d¹⁰4s² and in standard form it is 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰.
Thus the correct option is C.
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1. When an area is shown to have high
pressure on a weather map, what can typically be expected?
A. clear skies and clear weather
B. dark clouds and wet weather
C. overcast skies and clear weather
Answer:
On number 2.
its c
Answer:
1. A) 2. D) 4. A)
Explanation:
Where is the youngest part of the ocean floor found?
A. along the deep sea trenches
B. where ocean sediments are the thickest
C. near ocean ridges
D. where Earth's magnetic field changes polarity
Answer:
the youngest crust of the ocean floor can be found near the seafloor
(01.06 LC)
Which statement is true about the substances present in a mixture?
They always consist of the same element.
They are always in the same state of matter.
They can be separated by physical methods.
They can only be separated by chemical methods.
Answer:
They can be separated by physical methods.
Explanation:
Substances in a mixture are not subjected to anything that may change their chemical structure, so they are physical all throughout the process. Therefore, they can be separated using physical methods.
Answer:
They can be separated by physical methods.
Explanation:
I took the final
What method can be used to separate benzoic acid and potassium carbonate
Answer:
To separate the components, a water wash may be attempted to remove benzoic acid, but benzoic acid is not particularly water-soluble due to its nonpolar aromatic ring, and only small amounts would be extracted into the aqueous layer
The method that can be used to separate Benzoic acid and potassium carbonate is : The application of water wash separation method
Benzoic acid is slightly soluble in cold water but becomes more soluble as the temperature of water is increased. Water wash separation method is a methodology used for the selective removal of unwanted compounds in a mixture.
Separation method based on solubility water wash methodprecipitationThe separation of benzoic acid and potassium carbonate is based on the solubility differences between Benzoic acid and potassium carbonate when dissolved in a solvent ( water ) therefore the water wash separation method is the most effective method.
Hence we can conclude that The method that can be used to separate Benzoic acid and potassium carbonate is : The application of water wash separation method.
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The region of high pressure is called
answer in one word please
Answer:
anticyclone
Explanation:
3. Lemon juice is an acid. What ion is present in lemon juice that
makes it an acid?
Lemon is an acidic fruit with a pH ranging 2 to 3. The acid in lemons are citric acid which makes lemon tart, which is Vitamin C.
In a unit circle, ø = pi radians What is the terminal point? A. (1,0) B. (0,-1) C. (0,1) D. (-1,0)
Answer:
(-1,0)
Explanation:
According to Le
Châtelier's principle, how will an increase in concentration of a reactant affect the equilibrium system?
Shift it toward the products
O Shift it toward the reactants
O Shift it toward the side with higher total mole concentration
O Shift it toward the side
with lower total mole concentration
The correct option is Shift it toward the side with higher total mole concentration.
Le Châtelier's principle is an observation about the chemical equilibria of reactions. It states that changes in the temperature, pressure, volume, or concentration of a system will result in predictable and opposing changes in the system in order to achieve a new equilibrium state.
If the concentration of reactant increases, the equilibrium will shift toward the side with a higher total mole concentration to maintain the equilibrium.
Hence, the correct option is to Shift it toward the side with a higher total mole concentration.
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Answer:
Shift towards reactant
Explanation:
Where are cardiac muscles used? Are they voluntary?
Answer:
Heart
Not voluntary.
Explanation:
The heart is made up of special muscle called the cardiac muscle that contains interconnected muscle fibres which are supplied with blood through the coronary artery. Also so that the waves of contraction can travel throughout the mass of the muscle.
Answer:
Cardiac muscle is in the heart.
No, they are not voluntary.
Which of the following graphs correctly represents the relationship between the pressure and the volume of an ideal gas that is held at constant temperature
Answer:
B
Explanation:
Pressure is inversely proportional to temperature
3. Add labels for mass extinction and adaptive radiation:
Answer:
I'm assuming you need to label above the lines. So, above the line where the Cretaceous period ends is mass extinction and where the bracket lies is adaptive radiation.
Explanation:
Mass extinctions are periods of time where the organisms are essentially wiped out in an extremely brief period of time. You can see how the species just drops off. Adaptive radiation occurs when there is a diversification of a group of organisms as evident by the rise in the number of marine animal groups shown by the bracketed area.
If we use 18 moles of H2 how many moles of H2O do we make? Use this chemical equation: 6H2 + O2 → 3H2O
9 mol H₂O
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
BracketsParenthesisExponentsMultiplicationDivisionAdditionSubtractionLeft to RightChemistry
Atomic Structure
Reading a Periodic TableMolesAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisAnalyzing reactions RxNExplanation:Step 1: Define
[RxN - Balanced] 6H₂ + O₂ → 3H₂O
[Given] 18 mol H₂
[Solve] mol H₂O
Step 2: Identify Conversions
[RxN] 6 mol H₂ → 3 mol H₂O
Step 3: Stoich
[DA] Set up conversion: [tex]\displaystyle 18 \ mol \ H_2(\frac{3 \ mol \ H_2O}{6 \ mol \ H_2})[/tex][DA] Simplify: [tex]\displaystyle 18 \ mol \ H_2(\frac{1 \ mol \ H_2O}{2 \ mol \ H_2})[/tex][DA] Divide [Cancel out units]: [tex]\displaystyle 9 \ mol \ H_2O[/tex]Answer:
9 mol H₂O
give me brainliest pls
What are determiners
Answer:
a person or thing that determines or decides something.
Explanation:
A determiner, also called determinative, is a word, phrase, or affix that occurs together with a noun or noun phrase and serves to express the reference of that noun or noun phrase in the context. (Wikipedia)
brainliest?
Which of the following is the correct arrangement of energy transformation in a musical christmas light
Answer:
heat energy light energy sound energy
Explanation:
pa follo
Can a chemical reaction of iron pipes form rust
Answer:

Explanation:
A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place over the next few minutes? Molecules in both the metal and the surrounding air will start moving at lower speeds. Molecules in both the metal and the surrounding air will start moving at higher speeds. The air molecules that are surrounding the metal will slow down, and the molecules in the metal will speed up. The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down
Answer:
the air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.
chemistry:
please help:/
Answer:
132.0grams
Explanation:
The formula mass of a compound/molecule is calculated by summing the atomic masses of each individual atom in that compound or molecule.
According to this question, the gram-formula mass of CO2 is given as 44g i.e. by adding 12g of C and 2 × 16g of O. 3CO2 means that 3 moles of the same CO2 molecule.
To find the gram-formula mass of 3 moles of CO2, the following formula is used:
Since 1 mol of CO2 contains a formula mass of 44g
3 moles of CO2 (3CO2) will contain 3 × 44g = 132g of CO2.
How many moles are in a solution that has a molarity of 3.0M and a volume of 1500 ml.
(1L= 1000mL)?
O
4.5 mol
O
0.5 mol
4500 mol
500 mol
Answer:
1.25 Moles
Explanation:
1.25 moles of solute
Explanation:
Molarity is defined as the number of moles of solute per liter of solution.
Molarity = moles of solute / liter of solution
We are given the molarity and volume, both of which have the correct units. All we have to do is rearrange the equation to find the number of moles. You can do this by multiplying both sides of the equation by the volume to cancel it out on the right hand side. Afterwards, you should end up having the volume multiplied by the molarity equaling the number of moles of solute like so:
Moles of solute = Molarity * Volume
2.5M HCl * 0.5 L = 1.25 moles of HCl
I hope this made sense.
Jordan plays baseball. Practices ever where he goes. Where would the ball move fastest
Answer:
A. Jordan is on a moving train. He throws the ball toward the front of the train
Explanation:
24g of methane were burned in an excess of air. What mass of water would be produced in the reaction assuming complete combustion?Use the information below to answer the question.
Answer:
54g of water
Explanation:
Based on the reaction, 1 mole of methane produce 2 moles of water.
To solve this question we must find the molar mass of methane in order to find the moles of methane added. With the moles of methane and the chemical equation we can find the moles of water produced and its mass:
Molar mass CH₄:
1C = 12g/mol*1
4H = 1g/mol*4
12g/mol + 4g/mol = 16g/mol
Moles methane:
24g CH₄ * (1mol / 16g) = 1.5 moles methane
Moles water:
1.5moles CH₄ * (2mol H₂O / 1mol CH₄) = 3.0moles H₂O
Molar mass water:
2H = 1g/mol*2
1O = 16g/mol*1
2g/mol + 16g/mol = 18g/mol
Mass water:
3.0moles H₂O * (18g / mol) =
54g of waterLuisa likes to drink water from a plastic bottle. She knows the bottles were formed from synthetic polymers that were created in a chemical reaction. She also knows that synthetic materials can cause problems. Which statement explains the kind of problem that can develop from using synthetic materials such as plastics?
Complete question: Luisa likes to drink water from a plastic bottle. She knows the bottles were formed from synthetic polymers that were created in a chemical reaction. She also knows that synthetic materials can cause problems. Which statement explains the kind of problem that can develop from using synthetic materials such as plastics?
a) plastics have changed the way people use materials
b) plastics have made the lives of people easier
c) plastics have contributed to more pollution
d) plastics have made more work for people
Answer: The correct statement is plastics have contributed to more pollution. Option C.
Explanation:
Synthetic polymers are commonly called plastics. These are referred to as synthetic materials which can be softened by heat or pressure and then moulded into any desirable shape like the the plastic bottle Luisa drank from.
The raw materials for the manufacture of plastics are readily and cheaply available for the refinement of crude oil through series of chemical reactions. They are made by polymerization of monomers which are derived from petrochemicals.
Although they are used in producing materials used daily, it has contributed to more pollution over the years. POLLUTION is the release of chemicals or substances through man's activities, into the environment which causes harm to both man and the environment.
Plastics have contributed to more pollution because most plastics are non- biodegradable and cannot be broken down by microbial action into simple inorganic forms. Therefore, they cause severe land pollution problems since they are not easily disposable. Also is poses a major problem to the world supply of crude oil as it's limited. This is as a result of heavy dependence on crude oil which provides petrochemicals that is the bulk of the raw materials needed for making plastics.
PLEASE HELP MEEE
this is due like in 10 min
how do you explain that 1 OF2 + H2o --> 1 O2 + 2 HF demonstrates that mass is conserved in a chemical l reaction
Answer:
In order to find the two statements, we must first define what the enthalpy of formation and the enthalpy of reaction mean.
Enthalpy of formation:
The change in enthalpy when one mole of substance is formed from its constituent elemetns at standard state.
Enthalpy of reaction:
The change in enthalpy when a reaction occurs and the reactants and products are in their standard states.
Now, we check the statements. The true ones are:
The Hrxn for C(s) + O₂(g) → CO₂(g) is the same as Hf for CO₂
This is true because the formation of carbon dioxide requires carbon and oxygen in their standard states.
The Hf for Br₂(l) is 0 kJ/mol by definition.
Because the bromine is present in its standard state, the enthalpy of formation is 0.
The Hrxn for the reaction 1.5H₂(g) + 0.5N₂(g) → NH₃(g) is the same as the Hf for NH₃(g)
The reactants and products are present in their standard state, and the reaction is the same as the one occurring during the formation of ammonia.
What process is being shown by the movement of particles from one flower to another? Please help me fast.
Answer:
its diffusion can i get brainly pleasee tyyy