Pls help me and thank youuuu

Answer: a,

endothermic with the release of energy

Answer:

0.234 M

Explanation:

C- 12.009 x 7

H- 1.001 x 5

N- 14.006

O- 16 x 3

S- 32.059

___________+

183.133 g/mol

[tex]\frac{1mol}{183.133g} *\frac{85.6g}{2.00L}[/tex]  = 0.234 M Cancel out the grams mol/L equals molarity. Lowest significant figure is 3

Answer:

[tex]a=-3.37\ m/s^2[/tex]

Explanation:

Given that,

A car accelerates negatively from 35m/s to 8m/s in 8s.

We need to find the car's acceleration.

Initial speed, u = 35 m/s

Final speed, v = 8 m/s

Time, t = 8 s

The acceleration of an object is equal to the rate of change of velocity. So,

[tex]a=\dfrac{v-u}{t}[/tex]

Put all the values,

[tex]a=\dfrac{8-35}{8}\\\\a=-3.37\ m/s^2[/tex]

So, the acceleration of the car is equal to [tex]-3.37\ m/s^2[/tex].

When methane undergoes combustion the carbon dioxide (CO₂) and water (H₂O) is formed. Therefore, option C is correct.

A chemical reaction between two or more substances, usually involving oxygen, that produces heat and light in the form of a flame is called as combustion. The reaction is as follows:

CH4(g) + 2O₂(g) → CO₂(g) + 2H₂O

Methane burns in the presence of enough oxygen to produce carbon dioxide (CO₂) and water (H₂O). When it is burned, it produces a large amount of heat, making it an excellent fuel source.

Thus, option C is correct.

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Answer:

the answer is b

hope this helps you!!

Have a lovely day!

-millie :D

Answer:

carbon dioxide and oxygen

Answer: S+O2> SO2

Explanation:

Answer:

22.45g of Fe will be produced

Explanation:

The balanced reaction is:

Fe₂O₃(s) + 3CO(g) → 2Fe(s) + 3CO₂(g)

Where 1 mole of Iron (III) oxide reacts with 2 moles of Iron

To solve this question we have to find the moles of iron (III) oxide. With these moles and the balanced reaction we can find the moles of iron produced and its mass:

Moles iron (III) oxide -Molar mass: 159.69g/mol-

32.1g Fe₂O₃ * (1mol / 159.69g) = 0.201 moles Fe₂O₃

Moles Iron:

0.201 moles Fe₂O₃ * (2mol Fe / 1mol Fe₂O₃) = 0.402 moles of Fe

Mass Fe -Molar mass: 55.845g/mol-

0.402 moles of Fe * (55.845g/mol) =

Answer:

It goes through our digestive system then though our bladder.

Answer: When we eat the food gets digested.

Explanation: Once filled with food, the stomach grinds and churns the food to break it down into small particles. It then pushes the small particles of food into the first part of the small intestine, called the duodenum. The small intestine is where most of the digestion and absorption of our food takes place.

the speed of arrow is 83m/per second

that means

83metres = 1 second

●The arrow would cover the distance of 83 metres in 1 second

may this helps you

bye

Answer:

Homeostasis

Explanation:

The blood vessels constrict and you start to shiver, that shivering generates heat to warm the body to help to body temperature go back to normal. Homeostasis is the condition of keeping your body at a normal condition.

Answer:

the limiting reagent is butane

Explanation:

5C₄H₁₀ + 25O₂ → 20CO₂ + 5H₂0

Answer:

is a naturally occurring hydrocarbon gas mixture consisting primarily of methane, but commonly including varying amounts of other higher alkanes, and sometimes a small percentage of carbon dioxide, nitrogen, hydrogen sulfide, or helium.

It is formed when layers of decomposing plant and animal matter are exposed to intense heat and pressure under the surface of the Earth over millions of years. The energy that the plants originally obtained from the sun is stored in the form of chemical bonds in the gas

for heating, cooking, and electricity generation. It is also used as a fuel for vehicles and as a chemical feedstock in the manufacture of plastics and other commercially important organic chemicals.

Answer:

Definition:

Molarity of a given solution is defined as the total number of moles of solute per litre of solution. The molality of a solution is dependent on the changes in physical properties of the system such as pressure and temperature as unlike mass, the volume of the system changes with the change in physical conditions of the system. Molarity is represented by M, which is termed as molar. One molar is the molarity of a solution where one gram of solute is dissolved in a litre of solution. As we know, in a solution, the solvent and solute blend to form a solution, hence, the total volume of the solution is taken.

Formula :

[tex]m \: = \frac{n}{v} [/tex]

Where,

m = molar concentration

n = moles of solute

v = litres of solution.

Answer: Hewo, there! your Answer is Below

C. group of scientists that analyze scientific experiments

Explanation:

the process of someone reading, checking, and giving his or her opinion about something that has been written by another scientist or expert working in the same subject area, or a piece of work in which this is done: All these papers have been published after being subjected to peer review.

Hope this Helps you !!!

Have a great day!!!

Explanation:

30 to the second power

Answer:

[tex]Cu_{3}P[/tex]

Explanation:

usually, the first step is to calculate the moles but since that is already given in the question we can move onto the next step

least molar ratio:

Cu =  [tex]\frac{1.5}{0.5}[/tex] = 3

P = [tex]\frac{0.5}{0.5}[/tex] = 1

thus, empirical formula = [tex]Cu_{3}P[/tex]

The empirical formula for a compound that has 1.5 moles of copper and 0.5 moles of phosphorus is Cu₃P.

Empirical formula of any compound gives idea about the number of constituents particles present in that compound by mentioning the ration.

In the question, given that:

Moles of copper = 1.5 moles

Moles of phophorous = 0.5 moles

Now we divide the given moles by the smallest number to get the ration number as follow:
Cu  :  P

1.5/0.5  :  0.5/0.5

3  :  1

Hence, required empirical formula is Cu₃P.

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Answer: snake grass hopper and monkey

Explanation: i took the test and this is what i got

Answer:

snake grasshopper and monkey

Explanation:

Answer:

X represents London dispersion forces, and Y represents ion-dipole forces.

Explanation:

London forces occurs between molecules that are normally non-polar (electrically symmetric). It arises from instantaneous dipoles in molecules. It occurs in all substances.

Permanent dipoles are caused by non-symmetric electron distribution in molecules leading to a permanent dipole in the molecule such as in HCl. Interaction between the permanent dipole in these molecules and an ion is called ion-dipole interaction.

Hence; X represents London dispersion forces, and Y represents ion-dipole forces.

X represents London dispersion forces, and Y represents ion-dipole forces.

London forces:

Ion-dipole forces:

Hence; X represents London dispersion forces,

and Y represents ion-dipole forces.

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95.8% is the percent yield for sodium chloride if 56.0 g of sodium chloride is produced in the reaction.

Percentage yield of any chemical reaction can be calculated as:

% yield = (Experimental yield/Theoretical yield) × 100

Given chemical reaction is:

NaHCO₃ + HCl → NaCl + CO₂ + H₂O

In the question it is given that 56 grams of NaCl is produced by mass. But according to the stoichiometry of the reaction 1 mole of NaCl will be produced whose mass should be 58.44 grams. So, % yield will be:

% yield = (56/58.44) × 100 = 95.8%

Hence, option (d) is correct it means 95.8% is the percent yield.

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Answer:

need dim points back ma boi

Explanation:

Answer:

Ore is a deposit in Earth's crust of one or more valuable minerals. The most valuable ore deposits contain metals crucial to industry and trade, like copper, gold, and iron

The naturally occurring material from which a mineral or minerals of economic value can be extracted.

Answer:

Lungs.

Explanation:

This is because the lungs are respiratory organs in the body that are located at the either side of the thorax or chest. These are organs that are incharge of exchange of gases. The air is breathe in through the trachea i.e oxygen is inhaled and carbondioxide which is the waste product is exhaled. Gas exchange take place in the lungs.

Answer:

Normality= molarityX total POSITIVE oxidation number of solute Solvent=substance present in the greatest amount Solute= all other substances in the solution +1 (1 na+) is the total POSITIVE oxidation number of NaOH 2.0X1= 2.0 N=2.0

Explanation:

I had the same question on one of my assignments earlier

Answer:

cool

Explanation:

Answer:

The pool float looked would have looked deflated the next morning.

Explanation:

When temperature decreases the volume decreases

Answer:

The pool float most likely looked a little deflated or pushed in

Explanation:

The pool float most likely looked a little deflated or pushed in. This is because during the night temperatures most likely dropped. These cold temperatures during the night would have caused the air molecules inside the pool float to come closer together which would cause there to be more excess space inside the pool float. Therefore, allowing it to collapse into itself. This would be far worse if the float was filled with helium or another gas other than O2.

Answer:

A. The 100 mL of water would be a higher temperature than the 1,000 mL of water.

Explanation:

Since the volume of water affects temperature, when the volume increases this results in a lower temperature. This means that the water with the smaller volume will have a higher temperature.