can somebody please help me ! :(

Answer:

a. Zinc is the limiting reactant.

b. [tex]m_{ZnBr_2}^{by\ Zn}=162.61gZnBr_2[/tex]

c. [tex]m_{Br_2}^{leftover}=6.6g[/tex]

Explanation:

Hello there!

a. In this case, when zinc metal reacts with bromine, the following chemical reaction takes place:

[tex]Zn+Br_2\rightarrow ZnBr_2[/tex]

Thus, since zinc and bromine react in a 1:1 mole ratio, we can compute their reacting moles to identify the limiting reactant:

[tex]n_{Zn}=47.2g*\frac{1mol}{65.38g} =0.722molZn\\\\n_{Br_2}=122g*\frac{1mol}{159.8g} =0.763molBr_2[/tex]

Thus, since zinc has the fewest moles we infer it is the limiting reactant.

b. Here, we compute the grams of zinc bromide via both reactants:

[tex]m_{ZnBr_2}^{by\ Zn}=0.722molZn*\frac{1molZnBr_3}{1molZn} *\frac{225.22gZnBr_2}{1molZnBr_2} =162.61gZnBr_2\\\\m_{ZnBr_2}^{by\ Br_2}=0.763molBr_2*\frac{1molZnBr_3}{1molBr_2} *\frac{225.22gZnBr_2}{1molZnBr_2} =171.95gZnBr_2[/tex]

That is why zinc is the limiting reactant, as it yields the fewest moles of zinc bromide product.

c. Here, since just 0.722 mol of bromine would react, we compute the corresponding mass:

[tex]m_{Br_2}^{reacted}=0.722molBr_2*\frac{159.8gBr_2}{1molBr_2} =115.4gBr_2[/tex]

Thus, the leftover of bromine is:

[tex]m_{Br_2}^{leftover}=122g-115.4g\\\\m_{Br_2}^{leftover}=6.6g[/tex]

Best regards!

Answer:

a chemical bond in which two pairs of electrons are shared between two atoms.

Answer:

114

Explanation:

no

Answer:

n=m/M, so

Explanation:

Molar mass of Na is 22,9... so rounded to 23

n=42g/23g/mol

=1,826mol

Answer:

A solvent is a substance that dissolves a solute, resulting in a solution. A solvent is usually a liquid but can also be a solid, a gas, or a supercritical fluid.

Explanation:

Answer:

The products are Al(NO₃)₃(aq) and H₂(g).

Al(s) + 3 HNO₃(aq) ⇒ Al(NO₃)₃(aq) + 1.5 H₂(g)

Explanation:

Let's consider the reaction between aluminum and nitric acid. This is a single replacement reaction, in which Al replaces H in HNO₃ to form aluminum nitrate. The unbalanced reaction is:

Al(s) + HNO₃(aq) ⇒ Al(NO₃)₃(aq) + H₂(g)

We start balancing N atoms by multiplying HNO₃ by 3.

Al(s) + 3 HNO₃(aq) ⇒ Al(NO₃)₃(aq) + H₂(g)

Finally, we get the balanced equation multiplying H₂ by 1.5.

Al(s) + 3 HNO₃(aq) ⇒ Al(NO₃)₃(aq) + 1.5 H₂(g)

Answer:

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Explanation:

On a scale of 1️⃣ to , you’re a 9️⃣. I’m the 1️⃣ you need.

Answer:

See explanation

Explanation:

The acid commonly used to acidify KMnO4  is H2SO4. The reason why HNO3  is not used is because HNO3  is itself a strong oxidizing agent. HCl is not used because it can react with KMnO4.

FeSO4 solution is usually prepared fresh when needed because if the solution is prepared and left to stand for sometime, FeSO4  is oxidized to Fe2(SO4)3 by air. Fe III does not give the brown ring test.

Alkali are not stored in glass stopped reagent bottles because very strong alkali can cause the stopper to corrode and fuse to the neck of the bottle making it very difficult to open the reagent bottle.

Answer:D the pressure increases

Explanation:

Answer: D

Explanation:

the pressure increases

Explanation:

What happens during gas exchange in the alveoli?

These are called alveoli. They inflate when a person inhales and deflate when a person exhales. During gas exchange oxygen moves from the lungs to the bloodstream. At the same time carbon dioxide passes from the blood to the lungs.

What is the role of alveoli in gas exchange?

The alveoli are where the lungs and the blood exchange oxygen and carbon dioxide during the process of breathing in and breathing out. Oxygen breathed in from the air passes through the alveoli and into the blood and travels to the tissues throughout the body.

Answer:

I hope this helps

Explanation:

Adenosine TriPhospahte

Answer:

Hellloooo

ur answer is

Desktop Publishing.

Explanation:

thanks hope it helps

Answer:

31.58 L

Explanation:

From the question given above, the following data were obtained:

Initial mole (n₁) of gas = 1.90 moles

Initial volume (V₁) = 40 L

Final mole (n₂) = 1.90 – 0.40 = 1.5 moles

Final volume (V₂) =.?

The final volume of the gas can be obtained as follow;

V₁ / n₁ = V₂ / n₂

40 / 1.9 = V₂ / 1.5

Cross multiply

1.9 × V₂ = 40 × 1.5

1.9 × V₂ = 60

Divide both side by 1.9

V₂ = 60 / 1.9

V₂ = 31.58 L

Thus, the final volume of the gas is 31.58 L

Answer:

The arteries should be your answer!

Explanation:

Answer:

[tex]H_{2} + Cl_{2} --> 2HCl[/tex]

Explanation:

Hydrogen and chlorine are both diatomic, which means they occur in molecular pairs as gases. This means you will have two atoms of each on the left in the reactants, so you will need to add a coefficient of 2 to have 2 atoms of each on the right in the products.

Answer:

The SI base units of length, mass, and time are the meter (m), kilogram (kg), and second (s), respectively. SI units are a metric system of units, meaning values can be calculated by factors of 10. Metric prefixes may be used with metric units to scale the base units to sizes appropriate for almost any application

Answer: 1. Meters per second

2.meters per second squared

3.newtons

4. Kilo

Explanation:

Answer:

 1* 6.022*10^23=6.022*10^23 molecules of CO2 are present.

Answer:

2Al + 3Br2 = 2AlBr3 so the second option is right

Answer:

About two times faster.

Explanation:

Hello!

In this case, since we need a k2/k1 ratio to figure out the increase in the reaction rate for a chemical process, we need to use the following version of the Arrhenius equation:

[tex]ln(\frac{k_2}{k_1} )=-\frac{Ea}{R}(\frac{1}{T_2} -\frac{1}{T_1} )[/tex]

Thus, we plug in Ea, R and the temperatures to obtain:

[tex]ln(\frac{k_2}{k_1} )=-\frac{50,000J/mol}{8.314J/mol*K}(\frac{1}{322K} -\frac{1}{310.0K} ) \\\\ln(\frac{k_2}{k_1} )=0.723[/tex]

Now, we use exponential to obtain:

[tex]\frac{k_2}{k_1} =exp(0.723)\\\\\frac{k_2}{k_1}=2.1[/tex]

Thus, we infer that the reaction is about two times faster.

Best regards!

We have that at temperature of 325k reaction will be 2.45 times faster than at 310k.

Question Parameters:

Generally the Arrhenius  equation  is mathematically given as

[tex]log\frac{k^2}{k^1}=\frac{Ea}{2.303R}(\frac{1/t1}{1/t2})\\\\Therefore\\\\log\frac{k^2}{k^1}=\frac{50e3}{2.3038.314}(\frac{1/310}{1/325})1/k\\\\log\frac{k^2}{k^1}=\frac{2611.35*15}{310*325}\\\\K2=2.45*k1\\\\[/tex]

Therefore, we infer that

At Temperature of 325k reaction will be 2.45 times faster than at 310k.

For more information on Temperature visit

https://brainly.com/question/13439286

Answer:

113.80 mL

Explanation:

Given that:

Volume [tex]V_1 = 140 mL[/tex]

Temperature [tex]T_1 = 35.0^0C[/tex]

[tex]= (273 + 35) = 308 \ K[/tex]

Pressure [tex]P_1 = 697 mmHg[/tex]

At standard temperature and pressure;

Temperature [tex]T_2 = 273 K[/tex]

Pressure[tex]P_2[/tex] = 760 mmHg

Using the formula for a combined gas law:

[tex]\dfrac{P_1V_1}{T_1} = \dfrac{P_2V_2}{T_2}[/tex]

[tex]V_2 = \dfrac{P_1V_1T_2}{T_1P_2}[/tex]

[tex]V_2 = \dfrac{697 \ mmHg \times 140 \ mL \times 273 \ K }{308 \ K \times 760 \ mmHg}[/tex]

[tex]\mathbf{V_2 = 113.80 \ mL}[/tex]

Answer:

C. The less energy the organism requires, the more efficient the energy transfer.

Answer:

C

Explanation:

Trust the process

Edge 2021

EXPLANATION:

Alliance is an approach in which two or more companies agree to pool their resources together to form a combined force in the marketplace. Unlike a merger, an alliance does not involve the emergence of a new combined entity. ... The joint venture is a very popular form of an alliance.

Answer:

Alliance is an approach in which two or more companies agree to pool their resources together to form a combined force in the marketplace. Unlike a merger, an alliance does not involve the emergence of a new combined entity. ... The joint venture is a very popular form of an alliance.

Answer:

true

Explanation: becuase if you add the same liquid to a small container and then add it to a big container its going to have the same liquid amount it started with

Answer: a. exothermic

Explanation:

An Endothermic reaction is a type of chemical reaction in which energy is absorbed from the surrounding. The temperature of the surrounding decreases.

An Exothermic reaction is a type of of chemical reaction in which energy is released into the surrounding. The temperature of the surrounding increases.

When sodium hydroxide is dissolved in water, the temperature of water rise which means the heat has been released during dissolution of sodium hydroxide, thus the reaction is exothermic.

Answer:

K and Cl

Explanation:

Answer:

C

Explanation:

The battery is chemical energy. When it is used in the flashlight, it produces light and thermal energy

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Answer:

Magnesium

Explanation:

Magnesium is above iron in the reactivity series, which means that Mg can take oxygen from iron as it is a more reactive metal.