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jarptica [38.1K]

3 years ago

7

Choose one of these alternative energy sources. Research ways in which the energy from your source is distributed to users. Prep

are a brochure explaining your energy source

1 answer:

Crank3 years ago

5 0

sorry help yo self

cant help u delighted to not care

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Dominic needs some bleach to clean up a spill. He finds a bottle of cleaning solution, but there is no label on it. What should

Angelina_Jolie [31]

Answer:

He should ask an adult if they know what the solution is. if they dont, put it back and find a different cleaning solution to use

6 0

3 years ago

What is the name for MgBr2

Alexus [3.1K]

MgBr2: It's formed of Magnesium Mg, and dibromide Br2. And since Magnesium is a metal and Dibromide a no-metal, it's more appropriate while naming the substance to remove the "di" from "dibromide". Following the rules for naming compounds, the prefixes "mono", "di", etc... should only be used between 2 nonmetals.
So, the name for MgBr2 is Magnesium Bromide.

Hope this Helps! :)

5 0

3 years ago

How many liters of hydrogen gas is produced from 3.712 g of magnesium with 104.2ml of 1.385 mol/L HCL (aq) at SATP?

Savatey [412]

Answer:

The correct answer is 1.61 L.

Explanation:

Based on the given information, 3.712 grams of Mg reacts with 104.2 ml of 1.385 mol per L HCl at SATP, there is a need to find the amount of hydrogen gas produced in liters.

The chemical reaction taking place in the given case is,

Mg + 2HCl = MgCl2 + H2

The reacting moles of each reactants is,

Moles of Mg = 3.712 g/24.305 g = 0.153 moles

Moles of HCl = 1.385 mol/L * 0.1042 L = 0.144 moles

From the reaction it is clear that Mg and HCl are present in 1:2 molar ratio. Therefore, 0.153 moles of Mg can completely react with 0.306 moles of HCl. However, the moles of HCl obtained in the given case is only 0.144 moles, thus, HCl is a limiting reactant.

Now the moles of hydrogen produced is,

n = 0.144 moles of HCl * (1 mole H2/2 mol HCl) = 0.072 moles

Finally to find the liters of hydrogen gas produced, the ideal gas equation is used, that is, PV = nRT

At STAP, the value of T is 273 K and pressure is 1 atm, the value of R is 0.082 atm.L/mol.L. Now putting the values we get,

PV = nRT

V = nRT/P

V = 0.072 mol * 0.082 atm.L/mol.L*273/ 1 atm

V = 1.61 L

8 0

3 years ago

Olivia bought new gym shoes to play volleyball because she kept slipping when she ran in her old shoes. How will the new soles h

HACTEHA [7]

Maybe her old shoes had soft worn out bottoms and she slips in them. So her new shoes had more grip than her old ones so they kept her from falling.

6 0

3 years ago

Read 2 more answers

A human lung at maximum capacity has a volume of 3.0 liters. If the partial pressure of oxygen in the air is 21.1 kilopascals an

MrRa [10]

Answer : 0.026 moles of oxygen are in the lung

Explanation :

We can solve the given question using ideal gas law.

The equation is given below.

$PV = nRT$

We have been given P = 21.1 kPa

Let us convert pressure from kPa to atm unit.

The conversion factor used here is 1 atm = 101.3 kPa.

$21.1 kPa \times \frac{1atm}{101.3kPa}= 0.208 atm$

V = 3.0 L

T = 295 K

R = 0.0821 L-atm/mol K

Let us rearrange the equation to solve for n.

$n = \frac{PV}{RT}$

$n = \frac{0.208atm\times 3.0L}{0.0821 L.atm/mol K\times 295 K}$

$n = 0.026 mol$

0.026 moles of oxygen are in the lung

3 0

3 years ago