The empirical formula of the given compound is [tex]\bold{SO_3}[/tex].
The correct option is B.
What is an empirical formula?
The empirical formula of a chemical compound is the simplest whole-number ratio of atoms contained in the substance.
Given,
1.0 g of S
1.5 g of O
To calculate the empirical formula, we will divide the masses of the elements by their atomic weight.
For sulfur
[tex]\bold{\dfrac{1.0}{32} =0.03125\; mol}[/tex]
For oxygen
[tex]\bold{\dfrac{1.5}{16} =0.09375\; mol}[/tex]
Now, divide the greater value of mole came by the smaller value
[tex]\bold{\dfrac{0.09375\; mol}{0.03125\;mol} = 3}[/tex]
Thus, the empirical formula for the given compound is 1 for S and 3 for O
[tex]\bold{SO_3}[/tex]
Learn more about empirical formula, here:
https://brainly.com/question/11588623
After finishing a lab, you have some chemicals left over. You do not want to waste
them, so you carefully pour them back into the container you got them from.
Answer:
Instead, pour a small amount into a beaker or clean weigh dish. Once you have added a chemical to a container, label it promptly. When you are finished with the experiment, dispose of the excess chemical as chemical waste. Do not simply pour the excess chemical down the sink.
Avogadro's number represents the number of units in a mole. What is this value?
Answer:
The value for Avogadro's number is 6.02 × 10^23
Explanation:
[tex]{ \tt{6.02 \times {10}^{23} }}[/tex]
Why do trees produce carbon dioxide (CO2) at night?.
Answer:
Because photosynthesis ceases due to the lack of sunlight.
Explanation:
Plants typically absorb CO2 and release oxygen, but they also “exhale” CO2, particularly at night, when photosynthesis ceases due to the lack of sunlight. Forests also emit more CO2 when they are stressed by increasing temperatures.
which two practices are examples of how people use sciense
Answer: A: Explaining natural events using facts and data AND B:Developing theories using many lines of evidence
Explanation: trust me.
Heat is transferred in there ways wat and wat ???
Answer:
Radiation
Conduction
Convection
Explanation:
Radiation: Transfer of heat by electromagnetic rays (Example: A microwave heating food)
Conduction: Transfer of heat energy from one object to another through direct contact (Example: Getting out of bed and your warm feet touch cold tile, making the tile warm and your feet cold)
Convection: Movement of heat by a fluid such as air or water (Example: A convectional oven works by heating the air inside the oven to evenly cook food)
Hope this helps!
Question 15 (5 points)
The maximum allowed daily dosage of Imitrex is 0.2 g. If tablets contain 25 mg, how
many tablets are able to be ingested in a day? Provide numerical values in standard
notation (not scientific notatio) not including units.
This problem is providing us with the maximum mass of Imitrex a patient can get daily as 0.2 g. Also, the mass of a tablet is given as 25 mg so the number of tablets they get in a day is required. After the calculations, the result turns out to be 10 tablets.
Dimensional analysis:In chemistry, dimensional analysis is used to calculate specific outcomes given useful information to do so. Despite not having specific formulas for every problem, one can come up with a feasible proportional-factor-based setup, in order to obtain the required.
In this case, since the mass per tablet is 25 mg, one can divide the maximum dosage by this mass per tablet, both in grams, to obtain the required number of tablets for a daily dosage:
[tex]25\frac{mg}{tablet}*\frac{1g}{1000mg}=0.025\frac{g}{tablet} \\\\\#tablets=\frac{0.25g}{0.025\frac{g}{tablet}} \\\\\#tablets=10 tablets[/tex]
Learn more about dimensional analysis: https://brainly.com/question/10874167
How many moles of water contain 1. 3 x 1024 molecules?.
Hope it helps.
If you have any query, feel free to ask.
Answer:
2.2 moles
Explanation:
right on test
Earths mantle is made of a dense thick material that allows movement of crystal plates. Crust plate movement occurs because the the mantle flows as a result of uneven heating inside the mantle. ________ are created by very hot material deep in the mantle rising then cooling sinking again and then heating again and then repeating the cycle
Answer:
Convection cells
Solar power plants convert a form of
energy to an
form of energy
Answer:
not sure what to say to this but the rays of the sun contain solar energy which is then converted into energy to use for electrical power
What adaptation does a tufted titmouse have that allows it to stay in a broadleaf forest year-round?
They eat mice for energy to warm themselves.
They fluff their feathers for warmth.
They hibernate for the winter.
They migrate for the winter.
Answer: They use their feathers
Explanation: They fluff their feathers for warmth I think so at least
Because I'm sure they stay in the forest and don't really hibernate
Answer:
They fluff there feathers for warmth
Explanation:
I did the test and got 100
Can someone please help me it’s not hard I just need to get it done now!!
Answer:
The Chinese created black powder roughly 1000 years ago. It's a 75:15:10 mix of potassium nitrate (saltpeter), charcoal, and sulfur. Black powder is contained in a tube around a fuse in basic firework rockets. When lighted, more sophisticated fireworks shells are fired from a mortar containing black powder, which generates a lift-off response.
Distinct metals are mixed to generate different colors in fireworks. The difference between incandescence and luminescence is that incandescence is light created by heat and luminescence is light produced by other sources. Pure components are required for any type of light since traces of other chemicals will cloud the hue. Copper chloride produces a blue tint, while barium chloride produces a luminous green color.
What is the difference between alkalinity and basicity?.
Mia has been learning about the ways scientists study rocks and how they determine their relative ages.
She enjoys studying fossils. She learned how fossils called index fossils are found in the rock layers. The index fossils help scientists study rock ages. In what way do index fossils help determine rock ages?
Answer:
The shapes and lines they hold within the rock. Rocks can simply be regenerated and melted back into a new and different form. Lines and texture usually prove how old the rocks are.
Explanation:
I hope this helps and I'm sorry if it's wrong! <3
All the chemical reactions that occur in a cell are called.
how does sticky notes work ?
Answer:
sticky notes will open where you left them in the list of notes Tao or double click a notes to open it or from the keyboard press ctrl+n to start a new note to close a note tap or double click the class icon (x)
What type of bond involves the unequal sharing of electrons.
Answer:
Polar covalent bond
What sequence of bases on the strand of DNA is complementary to the sequence TATGCAT on another strand?
Explanation:
Predicting the Complementary Base Sequence Worked Examp in Double-Stranded DNA 28. What sequence 0f bases strand of DNA is complementany t0 the sequence TATGCAT on another strand? sratec Remembertnat and form complementary painswith and respecinely. andtheng0 through the sequence replacing 4 by L.Gby C Tby Aand Cby 6.Rememberalso that the end on the left andthe 3' endis on the right in the original strand: Solutlon Original: (52 TATGCAT () Complement () ATACGTA (5)
Ex 1) 45.2 g of Zn = _____ moles Zn
Ex 2) 0.568 moles Ag = _____ grams Ag
the molar mass of Zn is 65
number of mole(n)=reacting mass/molar massn=45.2/65=0.70g/mol2.the molar mass of Ag is 108
0.568=m/108then cross multiplym=0.568×108m=61.3gMethyl hydrazine (N2H3CH3) is a common liquid propellant used in rocket fuels. Look for the standard molar enthalpies of formation of the reactants and products. Calculate the ∆H˚ for the reaction per mole of N2H3CH3.
4N2H3CH3(l) + 5N2O4(l) → 12H2O(g) + 9N2(g) + 4CO(g)
The standard enthalpy of reaction of the given reaction is -865.71 kJ per mole of N₂H₃CH₃.
What is the standard molar enthalpy of formation?The standard molar enthalpy of formation of a compound is defined as the enthalpy of formation of 1.0 mol of the pure compound in its stable state from the pure elements in their stable states at P = 1.0 bar at a constant temperature.
Let's consider the following equation.
4 N₂H₃CH₃(l) + 5 N₂O₄(l) → 12 H₂O(g) + 9 N₂(g) + 4 CO(g)
We can calculate the standard enthalpy of the reaction using the following expression.
ΔH° = Σnp × ΔH°f(p) - Σnr × ΔH°f(r)
where,
ΔH° is the standard enthalpy of the reaction.n is stoichiometric coefficient.ΔH°f is the standard molar enthalpy of formation.p are the products.r are the reactants.ΔH° = 12 mol × ΔH°f(H₂O(g)) + 9 mol × ΔH°f(N₂(g)) + 4 mol × ΔH°f(CO(g)) - 4 mol × ΔH°f(N₂H₃CH₃(l)) - 5 mol × ΔH°f(N₂O₄(l))
ΔH° = 12 mol × (-241.81 kJ/mol) + 9 mol × (0 kJ/mol) + 4 mol × (-110.53 kJ/mol) - 4 mol × (54.20 kJ/mol) - 5 mol × (-19.56 kJ/mol)
ΔH° = -3462.84 kJ
In the balanced equation, there are 4 moles of N₂H₃CH₃. The standard enthalpy of reaction per mole of N₂H₃CH₃ is:
-3462.84 kJ / 4 mol = -865.71 kJ/mol
The standard enthalpy of reaction of the given reaction is -865.71 kJ per mole of N₂H₃CH₃.
Learn more about enthalpy here: https://brainly.com/question/11628413
Calculate the total number of protons, neutrons, and electrons for Bromine (Br).
Answer:
protons=35 neutrons=44.9 electrons=35
Explanation:
Jose and Denise are having a conversation about mechanical energy. Jose
says that mass has no affect on an object's potential energy. Denise
disagrees and believes that mass does have an affect on an object's
potential energy.
The mass of the body affects the potential, energy.
What is mechanical energy?The mechanical energy is energy possessed by a body by virtue of its position or its state of motion. There are two kinds of mechanical energy;
Kinetic energypotential energyThe potential energy is given by; PE = mgh hence the mass of the body affects the potential, energy.
Learn more about potential energy: https://brainly.com/question/999862
If you use 104 kiloliters of water per year, approximately how many liters of water do you use in a day?.
what effect does gravity have on stars?
Answer: creates the pressure to fuse atoms
What is the empirical formula of the polymer formed from ethene?
Answer:
C5H10
1-Propene, polymer with ethene | C5H10 - PubChem.
Explanation:
not sure.
Answer:
C5H10
Explanation:
1-Propene, polymer with ethene | C5H10 - PubChem.
What effect does the speed of molecules have on matter?.
Answer:
An increase in the speed of the molecules competes with the attraction between molecules and causes molecules to move a little further apart. Cooling a liquid decreases the speed of the molecules.
Explanation:
Which statement best describes the motion of the water molecules
when heat is added to the beaker?
Answer:
when heat is add to something that that odject gets hot or it turns into a gas or it milces
Explanation:
- Ibrahim and Emmanuel have been investigating the amount of copper sulfate that
can be dissolved in water at different temperatures. They added copper sulfate until
no more would dissolve and they carefully measured the mass of the copper sulfate
they added. Here are their results.
+ Temperature of water / °C
20
30
40
50
60
70
80
+Mass of copper sulfate dissolved / g
22
24
28
32
30
46
58
a. What is the range of temperatures that the boys used?
b. What interval did they use for the temperatures?
c. Name a variable the boys should have kept the same.
d. Which is the independent variable?
e. What conclusion can the boys make from their results?
The boys can arrive at the conclusion that as temperature increases, a greater mass of copper sulfate is dissolved in water.
What is an experiment?An experiment is a scientific investigation that seeks to obtain cause and effect relationships. There must be a dependent and an independent variable in every experiment.
The average of the temperature readings is; 20 + 30 + 40 + 50 + 60 + 70 + 80/7 = 50
They used an interval of 10 degrees for the temperature readings. The boys should have kept the heating time the same. The independent variable in this experiment is the temperature. The boys can arrive at the conclusion that as temperature increases, a greater mass of copper sulfate is dissolved in water.
Learn more about dependent and independent variables: https://brainly.com/question/967776
a. The range of temperatures that the boys used is 60.
b. The interval used for temperature = 10
c. Boys must have kept the amount of water same.
d. Independent variable is the amount of water.
e. The conclusion that can be made is the mass dissolved increases at higher temperature.
An experiment is a scientific investigation that seeks to obtain cause and effect relationships. There must be a dependent and an independent variable in every experiment.
An independent variable is the variable you manipulate or vary in an experimental study to explore its effects. It’s called “independent” because it’s not influenced by any other variables in the study.
A dependent variable is the variable that changes as a result of the independent variable manipulation. It’s the outcome you’re interested in measuring, and it “depends” on your independent variable.
Given,
a. Initial temperature = 20°C
Final temperature = 80 °C
Range = final temperature - initial temperature
= 80 - 20
= 60
Learn more about Scientific investigation, here:
https://brainly.com/question/12877465
#SPJ6
What do you observe at the bottom of the test tube after heating?
Answer:
If you heat the test tube from the bottom, any liquid can turn into a gas. The gas will rapidly expand shooting heated liquid out of the test tube like a cannon. ... Accidents happen even heating the test tube gently at an angle can result in heating liquid being shot out of the test tube
Carbon reacts with oxygen to produce carbon dioxide (CO2 (g), Delta. Hf = –393. 5 kJ/mol) according to the equation below. Upper C (s) plus 2 upper O subscript 2 (g) right arrow upper C upper O subscript 2 (g). What is the enthalpy change of the reaction? Use Delta H r x n equals the sum of delta H f of all the products minus the sum of delta H f of all the reactants. –393. 5 kJ –196. 8 kJ 196. 8 kJ 393. 5 kJ.
The change in enthalpy for the reaction of carbon dioxide is -393.5 kJ/mol. Thus, option A is correct.
The change in enthalpy of the reaction is given by the energy of the product and the energy of reactant difference.
The chemical equation for the reaction is:
[tex]\rm C \;(s)\;+\;2\;O_2\;(g)\;\to\;CO_2\;(g)[/tex]
Computation for the enthalpy changeThe standard enthalpy change for carbon dioxide is -393.5 kJ/mol
The standard enthalpy change for oxygen is 0 kJ/mol
The change in enthalpy of reaction is given as:
[tex]\rm \Delta \textit H=CO_2-2\;\times\;O_2\\\Delta \textit H=-393.5\;kJ/mol-2\;\times\;0\;kJ/mol\\\Delta \textit H=-393.5\;kJ/mol[/tex]
The change in enthalpy for the reaction of carbon dioxide is -393.5 kJ/mol. Thus, option A is correct.
Learn more about change in enthalpy, here:
https://brainly.com/question/1301642
Answer:
-393.5 kJ
Explanation:
edg 22, goodluck!
Water has a unique property. Like most liquids, it becomes denser as it cools, but at 4°c it reaches maximum density. Solid ice is less dense than liquid water, which is why ice floats. How would this property protect aquatic life in a lake?.
This unique property of water protects the aquatic life in a lake because this unique property prevents the lower layer of water to become solid.
How the unique property of water protects the aquatic life?If this property does not exists in water then in very low temperature all the water will turn to solid and all the aquatic animals present in the deep layer of water will die so we can conclude that this property of water protects the aquatic life in a lake due to prevent the water to change into solid.
Learn more about property here: https://brainly.com/question/2807928
