Can someone help me please

Answer: Oxidation reaction:  [tex]Al(s)\rightarrow Al^{3+}(aq)+3e^-[/tex]

Reduction reaction:  [tex]Sn^{2+}(aq)+2e^-\rightarrow Sn(s)[/tex]

Overall redox reaction : [tex]2Al(s)+3Sn^{2+}(aq)\rightarrow 2Al^{3+}(aq)+3Sn(s)[/tex]

Explanation:

Oxidation-reduction reaction or redox reaction is defined as the reaction in which oxidation and reduction reactions occur simultaneously.

Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.

[tex]Al(s)\rightarrow Al^{3+}(aq)+3e^-[/tex]

Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.

[tex]Sn^{2+}(aq)+2e^-\rightarrow Sn(s)[/tex]

Overall redox reaction : [tex]2Al(s)+3Sn^{2+}(aq)\rightarrow 2Al^{3+}(aq)+3Sn(s)[/tex]

Answer:

Bismuth, because when three cubes of the same mass were heated and dropped into the same temperature water, the water the bismuth cube was dropped in heated up much less than the water with iron or tin.

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The greatest heat capacity is possessed by iron.

The heat capacity of materials increases as the number of particles in the material or density of the material increases.

This means that the denser a material is, the higher its heat capacity because it has more particles that absorbs heat.

The heat capacity is the quantity of heat required to raise the temperature of 1 gram of a material by  1°C.

The heat capacities of iron, tin and bismuth are: 0.45 J/g °C, 0.213 J/g °C and 0.123 J/g °C.

This follows from the decreasing densities of the metals in the order; iron > tin > bismuth.

Hence iron has the greatest heat capacity among the three elements.

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Answer:

water is an example of mixture

Answer:

If kept in Celsius: 0.15 L

If kept in Kelvin: 0.89 L = 0.90 L

Explanation:

This formula can be remembered by just remembering the ideal gas law formula, PV=nRT

P= pressure, V= volume, n= moles, R=constant, and T= temperature.

Let's take away what is constant, particles/moles, pressure, and R.

so what we have is P=T -> [tex]\frac{V}{T}[/tex] =x, we want to know how it changes though so we can say that [tex]\frac{V1}{T1} = \frac{V2}{T2}[/tex]. Where P1 and T1 are for the air in your lungs that you expel, the P2 and T2 is the air now in your surroundings after you exhale.

Let's plug it in and solve for V2.

[tex]\frac{1 L}{37 C} = \frac{V2}{5.6}[/tex]

[tex]\frac{(1 L x 5.6 C)}{37 C} =[/tex] V2

0.15 L = V2

Answer:

k

Explanation:

Answer:

GIVEN IT'S A MULTI CHOICE QUESTION:

1. False

2. True

3. False

4. True

IF ITS NOT

2

Explanation:

We haven't made human clones because human cloning is extremely controversial and many people believe it is unethical.

Cloning is a genetic technique that can be used to reproduce genetically identical organisms in a laboratory.

In conclusion, we haven't made human clones because human cloning is extremely controversial and many people believe it is unethical.

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Answer:

A

Explanation:

The coefficents are used when determining mole ratio. So just look in front of O and B

the ratio is 3/4

you cna use this in stoich as well

Answer:

I believe the answer is 3. Carbonic acid has 3 more atoms than water.

Explanation:

Because water has 3 atoms and I think Carbonic acid has 6 so 6-3=3.

Answer:

Its right you dont have to change anything

Answer:

the correct answer is D

Explanation:

Basically, melting ice is an endothermic reaction because the ice absorbs (heat) energy, which causes a change to occur.

Answer:

Weaker attraction between its molecules than the green substance. It's molecules now move away from each other.

Explanation:

Liquid to gas.

The pink substance should be weaker attraction between its molecules than the green substance. It's molecules now move away from each other.

The following information should be considered:

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Answer: C. Horizontal lines where the temperature is constant during phase changes connect upward-sloping lines where the temperature increase.

Explanation:

Answer:

C

Explanation:

Answer: bacteria: e Coli

Explanation:

The bacteria and archaea  are microorganisms. Escheria coli, staphylococcus aureus etc are examples of bacteria. Different types of archaea includes bathyarchaeota, thermoproteota etc. Eukaryotes are multicellular organisms such as plants, fungi, animals etc.

Eukaryotes are multicellular organisms with developed cellular organization and developed nucleus. All the higher level organisms such as humans, animals, fungi, plants etc are eukaryotes.

Microorganisms such bacteria are single celled organisms and they are called unicellular having only one cell without a developed nucleus.There are many types of bacteria based on  their structure and functions such as spirulina, staphylococcus, vibrio coli etc.

Archaea is another type of unicellular organism which first classified as type of bacteria, but later they are included in a new class of domain. They are natural methanogens that is they produce methane gas. Some examples are bathyarchaeota, thermoproteota etc.

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#SPJ2

Answer:

Basically, fragrances reach other person through sense of smell. So, the strength of the fragrances depends a lot on its evaporation, which is strongly related to the boiling point. Esters with higher molecular weight do not have a strong fragrance because it has a higher boiling point.

Answer:

30.1 g NaCl

Explanation:

Your first conversion is converting grams NaOH to moles of NaOH using its molar mass (39.997 g/mol). Then, use the mole ratio of 1 mol NaCl for every 1 mol NaOH to get to moles of NaCl. Then finally multiply by the molar mass of NaCl (58.44 g/mol) to get grams of NaCl.

20.6 g NaOH • (1 mol NaOH / 39.997 g NaOH) • (1 mol NaCl / 1 mol NaOH) • (58.44 g NaCl / 1 mol NaCl) = 30.1 g NaCl

Answer:

Explanation:

You're kidding, right?

Earth is a puny little planet stuck in the Milky Way which is not a particularly large galaxy that has millions of stars with many times more our gravitational influence.

We are very lucky that the gravitational force is so weak. Were it not, We would be pulled in every direction imaginable and swallowed many times by larger and larger black holes until our existence could never be traced.

We would be like 1 electron in all the atoms of the Universe combined. There's no end to the size and scope of the forces involved if the gravitational force were even a small bit larger than what it is now.

Answer:

91.224 mg of caffeine will be extracted from a 60 mL cup of Turkish coffee (100 mg caffeine) by 40 mL of methylene chloride (CH2Cl2)

Explanation:

The distribution co-efficient of Caffeine for methylene chloride (CH2Cl2)/water (H2O) is   8.4

Volume of Turkish coffee = 60 mL

Volume of methylene chloride (CH2Cl2) = 40 ml

Distribution coefficient is represented by K

[tex]8.4 = \frac{\frac{X}{60}}{\frac{100-X}{50} } \\X = 91.224[/tex] mg

Answer:

Hello There!!

Explanation:

The answer is=>a. Gibbs.

hope this helps,have a great day!!

~Pinky~

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a. Gibbs

Answer:

kindly give options

Explanation:

Answer:

Your bones and muscles work together to support and move your body. Your respiratory system takes in oxygen from the air. ... Your circulatory system carries oxygen, water, and nutrients to cells throughout your body. Wastes from the cells are eliminated by your respiratory system, your excretory system, and your skin.

Explanation:

Cr2Na2O7

Sodium Dichromate

Answer:

I- It says horizon so.....what....wth ._.

Explanation:

Answer:

it is cylinder as it has two bases but no lateral faces.

Answer:

A. 30cm³

Explanation:

Based on the chemical reaction:

CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂

1 mol of calcium carbonate reacts with 2 moles of HCl to produce 1 mol of CO₂

To solve this question we must convert the mass of each reactant to moles. With the moles we can find limiting reactant and the moles of CO₂ produced. Using PV = nRT we can find the volume of the gas:

Moles CaCO₃ -Molar mass: 100.09g/mol-

1.00g * (1mol / 100.09g) = 9.991x10⁻³ moles

Moles HCl:

50cm³ = 0.0500dm³ * (0.05 mol / dm³) = 2.5x10⁻³ moles

For a complete reaction of 2.5x10⁻³ moles HCl there are necessaries:

2.5x10⁻³ moles HCl * (1mol CaCO₃ / 2mol HCl) = 1.25x10⁻³ moles CaCO₃. As there are 9.991x10⁻³ moles, HCl is limiting reactant.

The moles produced of CO₂ are:

2.5x10⁻³ moles HCl * (1mol CO₂ / 2mol HCl) = 1.25x10⁻³ moles CO₂

Using PV = nRT

Where P is pressure = 1atm assuming STP

V volume in L

n moles = 1.25x10⁻³ moles CO₂

R gas constant = 0.082atmL/molK

T = 273.15K at STP

V = nRT / P

1.25x10⁻³ moles * 0.082atmL/molK*273.15K / 1atm = V

0.028L = V

28cm³ = V

As 28cm³ ≈ 30cm³

Right option is: