Answer:
B) The subscript.
Explanation: In the chemical formula for water which is H20, the 2 which represents the number of hydrogen atoms is called subscript.
Are there elements with the same atomic number
Explanation:
No because each has specific atomic number and atomic mass
A solution of 0.2 M Sulfuric acid is titrated with a 0.2 M basic solution. In three to five sentences, explain how you can use the results of the titration as evidence for the ratio of sulfuric acid and the base in the balanced chemical reaction for the titration.
If there are 0.2 M solutions of both acid and base, the concentrations of hydrogen and hydroxide ions will be equal at equivalence point.
The reaction of sulfuric acid and a basic solution BOH occurs as follows;
H2SO4(aq) + 2BOH(aq) -----> B2SO4(aq) + 2H2O(l)
In the question, we are told that that both the solution of the sulfuric acid and the basic solution are 0.2 M.
The point where all the hydrogen and hydroxide ions have reacted according to the stoichiometry of the reaction. If there is really equimolar amounts of acid and base, the concentration of hydrogen and hydroxide ions will be equal at equivalence point.
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The measured dipole moment of a polar covalent compound is 1.11 D with a percent ionic character of 18.2%. What is the bond length of this compound
Answer:
80.2
Explanation:
we subtract 18.2 from the total percentage which is 100%
The measured dipole moment of a polar covalent compound is 1.11 D with a percent ionic character of 18.2%. Therefore, the bond length of this compound will be 1.270 angstrom.
What is dipole moment?
Dipole moment results due to the separation of charges in a compound. Dipole moment can occur between the two ions present in an ionic bond or between the atoms present in a covalent bond. Dipole moment occurs due to the differences in electronegativity of atoms. The larger the difference in electronegativity between ions, the larger the dipole moment of the compound.
The bond length of the compound can be calculated with the help of the formula:
Measured dipole moment = 1.11 D
Theoretical bond length = 4.8×bond length
Percentage ionic character = (μ₁ / μ₂) × 100
where, μ₁ = μ theoretical,
μ₂ = μ experimental
Putting the values in formula we get,
18.2 = (1.11/ 4.8 × bond length) × 100
Bond length = (1.11/ 4.8 × 18.2) × 100
Bond length = 111/ 87.36
Bond length = 1.270
Therefore, the bond length of the dipole is 1.270 angstrom.
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30 POINTS!!! ANSWER ASAP!!!!!!!!!!!!!
Energy cannot be created or destroyed; it can however be converted from one form to another. How does God use our spirituality and faithfulness the same way?
HELP!
Answer:
First, the simple part: light exhibits dual nature. It exists as both particles and wave. So light can be considered as “particles” but not molecules.
I need this asap please help
Answer:
A
Explanation:
A, because the chemical causes a varies of heat waves that warms your hand but it also create good light to see in the dark
What are 2 possible options for treating cancer
Answer:
The most common treatments are surgery, chemotherapy, and radiation.
Explanation:
Answer:
The most common treatments are surgery, chemotherapy, and radiation.
Other options include targeted therapy, immunotherapy, laser, hormonal therapy, and others
Which of the following are compounds? (Select all that apply.)
CO2
Cl2
Ne
NaCl
Atoms lose or gain electrons to become like a _____________.
Calculate the mass of 6.9 moles of nitrous acid (HNO2). Explain the process or show your work by including all values used to determine the answer.
Answer:
324.4 grams
Explanation:
47.013 g/mol is the molar mass of the nitrous acid.
Therefore with weight, nitrous acid is equal to 47.013 grams.
This value can be utilized to determine the mass of 6.9 moles within the same compound.
Since a single mole = 47.013 grams, we simply multiply:
6.9 x 47.013 = 324.4
The mass of the given nitrous acid contained in 6.9 moles is 324.3 g.
The molecular mass of the given nitrous acid is calculated as follows;
HNO₂ = (1) + (14) + (16 x 2)
M = 47 g/mol
The mass of the given nitrous acid contained in 6.9 moles of the acid is calculated as follows;
m = nM
where;
n is the number of moles of the acidM is the molecular massm = 6.9 x 47
m = 324.3 g
Thus, the mass of the given nitrous acid contained in 6.9 moles is 324.3 g.
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how long to thaw a 23 pound turkey in the refrigerator
Answer:
Like about 5-6 days in the fridge.
Explanation:
Given the reaction: (NH4)2CO3 → NH3 + CO2 + H20
What is the minimum amount of ammonium carbonate, in grams, that reacts to produce 1.0 mole of
ammonia?
Answer:
This is a simple stoichiometry problem using the ideal gas law.
First, take the grams of ammonium carbonate and convert it to moles using its molar mass and dividing. 11.9 g/96.0932 g/mol= .12384 mol
Now use a molar conversion using the balanced equation,
1 mol (NH4)2CO3 ---> 4 mol gas formed (2 mol NH3 + 1 mol CO2 + 1 mol H2O) = .12384 x 4 = .49535 mol gas
PV=nRT
V=nRT/P= .49535mol (.08206 Lxatm/molxK) (296K)/ (1.03 atm)=11.682 L
Explanation:
Hope this helps
Can I get Braineist.
Stoichiometry is used to determine the mass and the moles of the reactants and the products. 48 gms of ammonium carbonate is required to produce 1 mole of ammonia.
What is the stoichiometry coefficient?Stoichiometry coefficients are the numbers before the molecules of the reactant or the product side of the reaction that presents the numerical quantity of the chemical species.
The balanced chemical reaction is given as:
(NH₄)2CO₃ → 2 NH₃ + CO₂ + H₂0
Hence, 2 moles of ammonia are produced from 1 mole of ammonium carbonate. So, 0.5 moles of ammonium carbonate will be needed to produce 1 mole of ammonia.
Mass of ammonium carbonate is calculated as:
Mass = moles × molar mass
= 0.5 mol × 96.09 g/mol
= 48 gm
Therefore, 48 gm of ammonium carbonate is required to produce 1 mole of ammonia.
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-
True or False: Matter includes elements OR molecules. NOT BOTH *
True
False
Answer:
false
Explanation:
matter is anything that has mass and takes up space
this includes subatomic particles,
atoms (whcih are made of subatomic particles)
elements (whcih consis of atoms)
molecules (which are made of atoms)
compounds (which are made of molecules)
mixtures (homogeneous and heterogeneous)
and even
black holes
cheemistry is the study of the composition, properties, structure and energetic reactions of matter
the middle of an atom is called?
Answer:
In the middle of every atom is the nucleus
Explanation:
The nucleus contains two types of subatomic particles, protons and neutrons.
Answer:
the middle of an atom is called nuclear which contains total number of protons and total number of neutron
The following chart shows the masses and net force of vehicles travelling at the same velocity as they enter the highway. Which vehicle has the least momentum?
Vehicle
Mass (kg)
Force (N)
blue car
1,200
3,500
red car
1,100
3,500
green car
2,500
3,500
white car
2,000
3,500
green car
red car
white car
blue car
Answer:
red car as it has the least momentum
40. Give the chemical symbol of each of the following
elements.
a. the two elements that are liquids at room
temperature
b. the noble gas with the greatest atomic mass
c. any metal from group 4A
d. any inner transition metal
Will give brainliest :)
Answer:
a) bromine , mercury .
b) Oganesson .
c) Group 4A (or IVA) of the periodic table includes the nonmetal carbon (C), the metalloids silicon (Si) and germanium (Ge), the metals tin (Sn) and lead (Pb), and the yet-unnamed artificially-produced element ununquadium (Uuq).
d)thorium (Th), protactinium (Pa), uranium (U).
Bent molecules do not have lone pair on the central atom.
True or False
FALSE. Bent molecules do not have lone pair on the central atom.
What is bent molecules?Bent molecules is a kind of molecular geometry in which the central atom has two lone pairs of electrons and is associated with two bond pairs.
The molecular structure is also known as angular or V-shaped.
Thus, the statement "bent molecules do not have lone pair on the central atom" is FALSE.
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Bismuth (Bi) , What is the correct number of valence electrons
Explanation:
there are five valence electrons in Bismuth
a concern with using genetically modified crops is
Answer: Genetically modified plants may harm organisms that were never indented to be harmed.
After 200 million years, only 1/16 of the original amount of a particular radioactive waste will remain. The half-life of this radioactive waste is how many million years
Answer:
50 millions years
Explanation:
1 to 1/2 to 1/4 to 1/8 to 1/16
It takes 4 half lives to get to 1/16 of the original amount
200 million/4 = 50 millions years
The half-life of the radioactive waste is 50 million years.
To calculate the half-life of the radioactive waste, we use the formula below.
Formula:R/R' = [tex]2^{n/a}[/tex]............... Equation 1Where:
R = Original amount of the radioactive wasteR' = Remaining amount of the radioactive waste after decayn = Total timea = Half-life of the radioactive waste.Assuming: The original amount of the radioactive waste is y
From the question,
Given:
R = yR' = y/16n = 200 million years.Substitute these values into equation 1
y/(y/16) = [tex]2^{200/a}[/tex]16 = [tex]2^{200/a}[/tex]Solve for a
[tex]2^{200/a}[/tex] = 2⁴Equating the base
200/a = 44a = 200a = 200/4a = 50 million years.Hence, The half-life of the radioactive waste is 50 million years.
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. Dãy oxide nào sau đây tác dụng được với hydrochloric acid?
Answer:
ALL
Explanation:
The average yearly temperatures and latitudes of four cities are shown in the table above. Which of the following is demonstrated by the cities in the table?
a As latitude decreases, average yearly temperature generally increases.
B.
Climate is only influenced by latitude in the Southern Hemisphere.
C.
As latitude decreases, average yearly temperature generally decreases.
D.
The climate of an area is never influenced by the region's latitude.
Answer:
.
C.
As latitude decreases, average yearly temperature generally
Answer:
Wanna
Explanation:
J. Oing a meet its going to be fun yzn-dggf-jcq
Natures such as plants captures the suns energy and make their food through blank while blank get it energy by eating food
Answer:
Natures such as plants captures the suns energy and make their food through photosynthesis while Organisms get it energy by eating food
Explanation:
Photosynthesis is the act of transforming sunlight into energy. This is what plants (or natures) do to make their food.
In comparison, animals (or organisms) have to eat their food either by eating the plants (herbivores) or through other animals (carnivores)
This creates a food chain that energy travels down.
I hope this is what you were looking for, the grammar is a little confusing.
A pasageway of food from mouth to the stomach
Explanation:
It is called the : Esophagus
conversion factors are useful in solving problems in which a given measurement must be expressed in
Answer:
In humans, a cleft chin is dominant and no-cleft is recessive. What will the generations look like? Assume that Mendel’s method of crossing two true breeding parents with opposite traits is followed. Check all that apply.
The P generation, F1 generation, and F2 generation will have all cleft chins.
The P generation, F1 generation, and F2 generation will have all no-cleft chins.
The P generation and F1 generation will have all cleft chins.
The F1 generation will have all cleft chins.
The P generation and F2 generation will have all no-cleft chins.
The P generation and F2 generation will have cleft chins and no-cleft chins.
The P generation, F1 generation, and F2 generation will have cleft chins and no-cleft chins.
Explanation:
A 100. mL reactor vessel is charged with 250. mg of P 4 and 4.21 atm of C l 2 at 298 K. The reaction goes to completion. How many moles of chlorine gas are initially in the vessel
There are 0.0172 moles of chlorine gas initially in the vessel.
Suppose we take a look and consider the reaction between P4 and Cl2, the balanced chemical equation between them can be expressed as:
[tex]\mathbf{P_4 + 6 Cl _2 \to 4 PCl_3}[/tex]
Given that:
mass of P₄ = 250 mg = 0.25gpressure of Cl₂ = 4.21 atmvolume of the reactor = 100 mL = 0.1 Ltemperature = 298 KUsing the Ideal gas equation, the number of moles of chlorine gas that were initially present in the vessel is:
PV = nRT
Making (n) the subject of the formula:
[tex]\mathbf{n = \dfrac{PV}{RT}}[/tex]
[tex]\mathbf{n = \dfrac{4.21 \ atm \times 0.1 \ L}{0.0821 \ atm.L/mol*K \times 298 \ K}}[/tex]
n = 0.0172 moles
Therefore, we can conclude that there are 0.0172 moles of chlorine gas initially in the vessel.
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A piece of mefal with mass of 6. 11 g is placed into a graduated cylinder that contains 25. 1 mL of water, raising the water level to 56. 7 mL, what is the density of the metal?.
[tex] \huge\mathrm{Question}[/tex]
Can someone give me step by step Explanation for this question ?
That would be of great help ~
Thanks for Answering ~
From the stoichiometry of the reaction, the mass of AgNO3 required is 340 Kg.
Number of moles of I2 produced in the third step = 254 × 10^3 g/254 g/mol = 1000 molesIn the first step, 1 mole of AgNO3 produces 1 mole of AgIIn the second step, 2 moles of AgI produces 1 mole of FeI2
In the third step, 2 moles of FeI2 produces 2 moles of I2
Hence;In the third step;
1000 moles of I2 is produced by 1000 moles of FeI2
In the second step;2 moles of AgI produces 1 mole of FeI2
x moles of AgI produces 1000 moles of FeI2
x = 2 moles × 1000 moles/ 1 mole
x = 2000 moles
In the first step;2000 moles of AgI is produced by 2000 moles of AgNO3
Mass of AgNO3 required = 2000 moles of AgNO3 × 170 g/mol = 340 Kg
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Properties of a gas are..
-no definite shape or volume
-has definite shape, does NOT
-have definite volume
-has definite volume AND shape
-none of the above
ASAP need help
the answer would be none of the above.
Determine the atomic number, mass number, and number of neutrons in
Answer:
mass number = protons + neutrons i guess
a. Identify the steps of the scientific method?
b. 1. What was the scientific question for this experiment?
b. 2. what hypothesis did the scientist form from the question?
b. 3. What prediction could be used to test the hypothesis?
b. 4. What did the control group consist of?
b. 5. How were the data presented?
b. 6. Was the hypothesis supported or rejected by the data? Explain your answer.
b. 7. Name on possible source of error or bias in this expirement?.
b. 8. How did the fact that the article was not peer reviewed affect the scientist?
Answer:
1. The steps of the scientific method consist of seven things: Ask a question, get the research needed for a experiment, (What are you trying to find out? What materials do I need to complete the experiment? What are the procedures needed to complete the experiment?) create a hypothesis, (your educated guess on what you think the results of the experiment will be) conduct a experiment (complete multiple different trials preferably three) to test your hypothesis, make observations and record data during the experiment, draw a conclusion, (Was your hypothesis correct? Yes or no and explain why it is wrong or right) present your findings.
2. A hypothesis is a educated guess that the scientist believe will be the answer at the end of the experiment which is why they conduct a experiment in the first place to find viable data that will support their hypothesis.
3. Predictions consist of theories that will test the hypothesis (educated guess) because they're the reasoning to why you believe your guess is correct.
4. A control group consists of variables that do not go through change during a experiment, things that remain the same.
5. Data can be presented in many different ways in the form of graphs, charts, or a research paper. You find the data by completing multiple different trials in a experiment, to make sure you have valid results to write down in your data research.
6. Remember that your hypothesis is your educated guess at the beginning of the experiment, what YOU thought was going to happen during the experiment and if the data you received during the experiment supports your hypothesis.
7. Your procedures, perhaps you measured a variable wrong, perhaps you used to much, or to little of a variable, all depends on your experiment.
8. Having people review and test your data by conducting their own experiments will not only make sure that your data is valid but it insures you even more of your conclusion, making it more accepted by other scientists.
Hope this helps.
