Answer:
5 minutes because he is good guy
A. 63 kg ball is moving at 4. 3m/s. What is the momentum of the ball?
What is the group number and period number for Selenium?
group 7A, period 4
group 6A, period 4
group 6a. period 3
group 4a, period 6
Answer:
Group 6a, period 4
Explanation:
Refer to image
A sample of oxygen that occupies 1.00 * 10^6 at 575 mm Hg is subjected to a pressure of 1.25 atm. What will the final volume of the sample be if the temperature is held constant?
A sample of oxygen occupies 1.00 × 10⁶ mL at 575 mmHg. If the pressure is increased to 1.25 atm, the volume decreases to 6.06 × 10⁵ mL.
What does Boyle's law state?Boyle's law states that the pressure of a given mass of an ideal gas is inversely proportional to its volume at a constant temperature.
Step 1: Convert the initial pressure to atm.We will use the conversion factor 1 atm = 760 mmHg.
575 mmHg × 1 atm/760 mmHg = 0.757 atm
Step 2: Calculate the final volume of the gasA sample of oxygen occupies 1.00 × 10⁶ mL (V₁) at 0.757 atm (P₁).
If the pressure is increased to 1.25 atm (P₂), we can calculate the new volume (V₂) using Boyle's law.
P₁ × V₁ = P₂ × V₂
V₂ = P₁ × V₁ / P₂
V₂ = 0.757 atm × 1.00 × 10⁶ mL / 1.25 atm = 6.06 × 10⁵ mL
A sample of oxygen occupies 1.00 × 10⁶ mL at 575 mmHg. If the pressure is increased to 1.25 atm, the volume decreases to 6.06 × 10⁵ mL.
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(VIEW PHOTO) Identify the parts of the equation by dragging each label below to the correct arrow on the diagram. Drag the items on the left to the correct location on the right.
The location are Solid, reactants, aqueous, liquid, gas.
A strong has a precise form and volume. A liquid has a particular quantity, but takes the shape of its field. A gasoline lacks either a defined form or quantity. Plasma is similar to a gasoline in that its particles are very some distance aside, but a gasoline is electrically neutral and plasma has a rate.
What's chemical response?A chemical reaction occurs while one or greater chemical substances are modified into one or greater other chemical compounds. Examples: iron and oxygen combining to make rust. vinegar and baking soda combining to make sodium acetate, carbon dioxide and water.
What's strong ?A strong is a state of be counted that keeps its form and density when now not constrained.
What are 3 forms of gases?Elemental gasses. those are the factors that exist as gasses at trendy temperature and stress.pure and mixed gases. pure gases can be made of person atoms consisting of inert gases or may be constructed from a group of various atoms which include carbon dioxide. poisonous gases.Learn more about chemical compounds here: https://brainly.com/question/26487468
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Which compound can inadvertently be created through the distillation process and can be fatal if consumed
Answer:
lWhich compound can inadvertently be created through the distillation process and can be fatal if consumed?
Methanol
True or false, some molecules have the same molecular formula as their empirical formula.
Answer:
True, some molecules have the same molecular formula as their empirical formula.
Explanation:
The empirical formula of many compounds may be the same. Formaldehyde, for example, has the chemical formula CH2O, which is equal to the empirical formula of glucose. Each molecule of formaldehyde has one carbon atom, two hydrogen atoms, and one oxygen atom.
Why does one boil the charcoal-unknown-water mixture as opposed.
In a charcoal-water-unknown mixture, this must be boiled in opposition because the coal is insoluble, and with the heated mixture the coal can be removed.
What is the recrystallization process?It is used in the chemical sciences as a technique used to purify chemicals by heating materials to temperatures above the crystallization of each compound.
Therefore, when a component is heated, the impurities are dissolved and can be removed from the solution, generating the purification of the compound.
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HELP ME PLEASE 100 POINTS!!!!!!!!!
Record the weight showing on the scales by clicking on the Report button below.
How many foot-pounds of work were done?
Force (weight from scale reading in above question) times the distance (1 foot) = work done.
Type your foot-pounds answer in your Report document.
2. Place the box on a smooth surface.
Pull the box 1 foot across a smooth desk or table.
Record the weight showing on the scales.
A. How many foot-pounds of work were done?
(Force [weight from scale reading] times the distance [1 foot] = work done.)
Type your foot-pounds answer in your Report document.
B. What is the difference between the amount of foot-pounds required to lift the box and to pull the box?
Record this difference.
C. Why is there a difference between lifting an object and pulling it across a surface?
Clue: What force are you working against when you lift the object?
3. Find another object to lift and pull with the spring scale. Write the difference in foot-pounds between lifting and pulling.
a. lifting
b. pulling
c. difference
d. Write your conclusions from both experiments in your own words.
Answer:
the answer is c
Explanation:
i took the test
three ways in which atmosphere nitrogen can be fixed
There are three major ways in which this happens: first, by lightning, when the energy of lightning strikes breaks apart the N2 bonds; second, by industrial methods, when humans break the bonds with high pressure and temperatures, and hydrogen; finally, by biological fixation, with bacteria living in the soil.
Give the characteristic of a first order reaction having only one reactant.
Answer:
As the first order reaction depends on (a uni-molecular reaction) the concentration of only one reactant.
And the rate law of the reaction of first order with a reactant A is:
rate = K[A]^-1
when K is the rate constant.
As molecules move in a current of air or water, heat is transferred by ____________.
Answer:
It is called Convection. Hope this helps!!!
How many atoms are in 15.1g of potassium?
Answer:
2.32 x10^23 atoms
Explanation:
15.1/39.10 x (6.02 x10^23)
= 2.32 x10^23 atoms
First, you divide 15.1 g of potassium by its molar mass. (Molar mass of potassium is 39.10 g). Then you multiply using Avogadro's number (6.02 x10^23) to get your answer.
how many CO2 molecules exist in the following reaction? C3H8 + 5O2 >>> 3CO2 + 4H2O
Answer:
21.0g of CO2
Explanation:
This question is about the extraction of metals.
Element R is extracted from its oxide by reduction with hydrogen.
The equation for the reaction is:
3H2 + RO3 R + 3H20
03
1
The sum of the relative formula masses (M) of the reactants (3H2 + RO3) is 150
Calculate the relative atomic mass (A) of R.
Relative atomic masses (A): H = 1 O= 16
I
I
[2 marks]
Relative atomic mass (A) of R =
The relative atomic mass of the element R is 96.
What is the relatives atomic mass of an element?The relative atomic mass of an element is the number of times the mass of one mole of that element is heavier than 1/12 the mass of one atom of carbon-12.
The relative atomic mass of an element can also be obtained from the fomula mass of the compound the element occurs in
The sum of the relative formula masses (M) of the reactants (3H2 + RO3) = 150
3 × 2 × 1 + R + 16 × 3 = 150
R = 150 - 54
R = 96
Therefore, the relative atomic mass of R is 96.
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What do you notice about the Total
height lost in each set of trials?
Answer: In each set of trails, the total height lost was the same.
Explanation:
what is osmosis and it's functions
Answer:
Osmosis is a passing of material and especially water through a membrane (as of a living cell) that will not allow all kinds of molecules to pass. Osmosis allows water to pass through cell membranes. The transfer of water from a dilute solution to a concentrated solution over a partly permeable membrane is defined as osmosis.
Explanation:
I hope this helps :)
Determine what’s wrong with these electronic configurations
Answer:
Explanation:
19) it is 3d10 instead of 4d10
20) it is missing 3p6, and 4s2 before 3d5
21) Ra is not a noble gas
22) Cs is not a noble gas
What are bubbles (fizzes) in a soda can be described as??
Liquid to Gas or Gas to Liquid
Answer:
Liquid to Gas
Explanation:
The drink in the soda is a liquid and when you open the can, the CO2 leaves the container.
Hope this helped! :)
Use the periodic table to determine the molar mass of silver oxide (Ag20).
Type the correct answer in the box. Use numerals, and express your answer to the correct number of significant figures
(blank) g/mol
The molar mass of the compound (i.e silver oxide) Ag₂O obtained from the periodic table is 232 g/mol
What is the molar mass of a compound?The molar mass a compound is simply defined as the sum of the molar masses of the individual elements found in the compound.
How to determine the molar mass of the compound Formula = Ag₂OMolar mass of Ag = 108 g/mol Molar mass of O = 16 g/mol Molar mass of Ag₂O =?Molar mass of Ag₂O = (2×108) + 16
Molar mass of Ag₂O = 216 + 16
Molar mass of Ag₂O = 232 g/mol
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Answer: 231.753 g/mol
Explanation:
got it right on Exact Path
what is the trophic level of common Prawn? primary,secondary,or tertiary consumer?
Answer:
secondary consumer
Explanation:
The salt water food web begins with producers (plants, algae, phytoplankton) that create food from sunlight, and continues with primary consumers (zooplankton) that eat the producers, followed by secondary consumers (shrimp, crustaceans, small fish) that eat the primary consumers, then tertiary consumers
A population of deer live in a forest ecosystem. Which of these describes a density-independent factor that could affect this population?
A. An invasive species causes increased competition for space.
B. A new predator is introduced into the ecosystem.
C. A wildfire occurs in the ecosystem.
D. The deer population's food supply decreases.
Answer:C. A wildfire occurs in the ecosystem.
Explanation: I just got it right
What kind of metal are spoons typically made out of?.
Answer:
Spoons are usually made out of steel
Answer:
Aluminum and steel
Explanation:
PREDICT THE PRODUCTS AND AND BALANCE THE EQUATION
Al(s) + __O2 (g)
Answer:
See below.
Explanation:
Products :-
Al₂O₃ (aluminum oxide)
Balanced Equation :-
4Al + 3O₂ => 2Al₂O₃
Hope it helps.
If 17. 6 g of hcl are used to produce a 14. 5 l solution, what is the ph of the solution?.
This problem is providing us with the mass of hydrochloric acid and the volume of solution and asks for the pH of the resulting solution, which turns out to be 1.477.
pH calculationsIn chemistry, one can calculate the pH of a solution by firstly obtaining its molarity as the division of the moles of solute by the liters of solution, so in this case for HCl we have:
[tex]M=\frac{17.6g*\frac{1mol}{36.46g} }{14.5L} \\\\M=0.0333 M[/tex]
Next, due to the fact that hydrochloric acid is a strong acid, we realize its concentration is nearly the same to the released hydrogen ions to the solution upon ionization. Thereby, the resulting pH is:
[tex]pH=-log(0.0333)\\\\pH=1.477[/tex]
Which conserves as much decimals as significant figures in the molarity.
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A gas at 7.75 x 104 Pa and 17°C occupies a volume of 850. cmº. At what temperature, in degrees Celsius, would the gas occupy 720. cm3 at 8.10 x 104 Pa?
[tex]\tt \dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}[/tex]
T₁=17+273=290 K
7.75x10⁴.850/290 = 8.10x10⁴.720/T₂
T₂=256.74 K = -16.26°C
The final temperature can be measured using combined gas law. The final temperature of the gas with the volume of 8 L and 1 atm pressure is 260 °C.
What is combined gas law :Combined gas law states the relation between volume, temperature and pressure of a gas as written below:
PV/T = constant.
This law is the combination of Boyle's law, Charle's law and Gay-Lussac's law.
Given the initial quantities:
P1 = 7.75 × 10⁴
V1 = 850 cm³
T1 = 17 °C
Final quantities:
P2 = 8.10 × 10⁴
V2 = 720 cm³
Then, P1 V1/T1 = P2 V2/ T2
The final temperature T2 = P2 V2 T1/P1 V1
T2 = ( 8.10 × 10⁴×720 cm³× 17°C)/ ( 7.75 × 10⁴ × 850 cm³ L) = 15°C
Therefore, the final temperature is 15°C.
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A solid has a very high melting point, great hardness, and poor electrical conduction. This is a(n) ________ solid
is the tendency of an object to resist a change in its state of motion.
Answer:
Inertia is the tendency of an object to resist changes in its state of motion.
Explanation:
hope this helps
14. When weathering breaks down rocks with water, wears things away with wind, and scorches or freezes the earth
with temperature, it is called
weathering
15. In chemical weathering chemicals in the air mix with water to make
that eats
away at limestone rock Oxygen reacts with iron and forms
16. Erosion is the flow of water that moves rocks and sand, the push of the wind that carries sediments away and
even the movement of a
dropping pieces of rock at the bottoms of oceans and lakes.
Go onto brainpop.com and find the tutorial called Weathering. Login with sawgrassmid and poplearn.
and eventually
17. Weathering is the process that breaks down rocks into
18.
formation depends on sediments from weathering and those same bits make up sedimentary
rocks.
Answer:
14. Mechanical Weathering
15. & 16. I'm not sure
17. Smaller Pieces, Minerals I think
18. I can't remember
Explanation:
I'm not 100% sure about these but I hope they help. Sorry I couldn't do any more.
Philip finds this information while doing research about margarine, which is a synthetic food product.
Hydrogenation is a process through which vegetable oil is changed from a liquid into a solid. During hydrogenation, a chemical reaction occurs. Hydrogen is added under pressure to the vegetable oil, resulting in a synthetic form of fat called trans fat. Trans fats typically taste better and can be stored longer than natural vegetable oils. A food product that results from hydrogenation is margarine. The Mayo Clinic website explains that margarines that contain trans fats increase the risk of heart disease and increased levels of cholesterol in the blood. Trans fats also reduce the amount of “good” cholesterol in the blood. Trans fats occur naturally in meat and dairy products. A 2009 report in Advances in Nutrition suggests that trans fats from animal products, such as dairy, beef, and lamb, may have beneficial health effects, including reducing the chance of developing heart disease or cancer. Which conclusion is best supported by the information that Philip gathered?
0 A) Trans fats have little effect on your health.
O B) Experts recommend avoiding trans fats altogether.
O C) Research shows conflicting evidence of the effect of trans fats on human health.
O D) Trans fats produced by hydrogenation have the same overall effect on human health as naturally occur- ring trans fats.
Answer:
Research shows conflicting evidence of the effect of trans fats on human health.
help this mirrorball, please
Answer:
Option B
Explanation:
Avagadro's hypothesis showed that at constant temperature and pressure equal volume of all gases contains equal no of molecules.
Avagadro's constant is known as 6.022×10^23
Which of the following represents Avogadro's hypothesis?
Equal volumes of all gases under same conditions of temperature and pressure contain equal number of moleculesAvogadro's hypothesis is an experimental gas law that relates to the volume of gas to the amount of gas present. Its formula is :
[tex] \sf \frac{V_1}{ n_{1} } = \frac{V_2}{ n_{2} } [/tex]
Where,
V1 is first volumeV2 is second volumen1 is first amount of gas (in moles)n2 is second amount of gas (in moles)