Two Quick Chemistry Questions, Requesting Urgent Help, Please?

Two quick Chemistry questions, requesting urgent help, please?

Two Quick Chemistry Questions, Requesting Urgent Help, Please? 1

Question 1. a. 2 moles of zinc sulfide solid react with 3 moles of oxygen gas to produce 2 moles of solid zinc oxide and 2 moles of sulfur dioxide gas. b. 1 mol of calcium hydride reacts with 2 moles of liquid water to for 1 mole of aqueous calcium hydroxide and 2 moles of hydrogen gas. Question 2. a. H2 Cl2 ----> 2HCl b. 2Al Fe2O3 ----> Al2O3 2Fe c. Pb(CH3COO)2 H2S ----> PbS 2CH3COOH

— — — — — —

In an experiment 10.000 g of magnesium is reacted with 5.267 g of oxygen gas according to the equation:?

1) A. Oxygen is the limiting reactant. The equation is 2Mg O2--> 2MgO. 10 g of Mg is 0.411 mol. therefore, you need 0.2055 mol of O. That translates to 6.576g. However, there is only 5.267g of O. B. You've got 5.267g of O. that is 0.1646 mol. So, you need 0.3292 mol of Mg. However, you have 0.411 mol of Mg. So, you have 0.0818 mol of Mg excess. That weighs 1.99g C. 0.3292 mol of MgO is produced. that weighs 13.27g 2) A. The reaction balanced is SiO2 4HF --> SiF4 2H2O There is 0.401 mol of HF present. So, 0.1 mol of SiO2 is required. However, 0.131 mol of SiO2 is present. So, HF is the limiting agent. B. 0.031 mol of SiO2 is in excess. That weighs 1.863g C. 0.201 mol of water is produced. That weighs 3.618g and that's it. I've run out of patience. Try to do your worksheets on your own. For example, since your questions are similar, post one and do the other 3 on your own

Two Quick Chemistry Questions, Requesting Urgent Help, Please? 2

— — — — — —

Oxygen gas is released from photosynthesis from the...?

Oxygen is a product of the light-driven water-oxidation reaction catalyzed by photosystem II; it is not generated by the fixation of carbon dioxide. Consequently, the source of oxygen during photosynthesis is water, not carbon dioxide. so your answer is:- c. Light reactions

— — — — — —

Calculate the mass of oxygen gas to that yields 5.234 g of water?

tm, The equation tells us that we need 8 moles of O2 to get 6 moles of H2O. Mass of oxygen = 32.00 grams/mole O2 * (8 moles O2/6 moles H2O) * (5.234 g H2O / 18.015 g H2O) = 12.40 g O2 (4 sig figs) Hope that helped!

— — — — — —

explain why the product of the reaction of potassium metal with oxygen gas is teremed a basic oxide ? Write?

4K O2 ==> 2K2O K2O is called a basic oxide because it forms a base (KOH) when reacted with water: K2O H2O ==> 2KOH Contrast that with a nonmetal (acidic) oxide like SO3 that produces an acid when reacted with water: SO3 H2O ==> H2SO4

— — — — — —

If 219 g of aluminum fluoride react with 48 g of oxygen gas, how many grams of fluorine gas will be produced?

YOu need to know the limiting reactant= the reactant that produces least amount of product the least amount of product is the final product 219 g AlF3/1 * 1 mol AlF3/ 83.977 g AlF3 * 6 mol F2/ 4 mol AlF3 * 37.997 g F2/ 1 mol F2= 149 g F2 48 g O2/ 1 * 1 mol O2/ 31.999 g O2 * 6 mol F2/ 3 mol O2* 37.997 g F2 / 1 mol F2= 114 g F2 oxygen gas is the limitng reactant aluminum flouride is the excess reactant some is consumed other there to ensure all limiting reactant is consumed

— — — — — —

Calculating Mass Fractions of a Hydrogen and Oxygen Gas Mixture Pre Ignition

The derivation has a mistake in setting $FA = phi n_fs/n_O2s$. Here is the correction. For simplicity, I use $F$ rather than $FA$, $m_O$ and $n_O$ as the mass and moles, respectively, for O$_2$, and a $star$ for stoichiometric. I use the term $omega$ for mass fraction and $M$ (capital M) for molar mass. $$ phi equiv fracFF_s = fracm_f/m_Om^star_f/m^star_O $$$$ omega_O equiv fracm_Om_f m_O = frac1F 1 $$$$ F = phi F_s = phi fracm^star_fm^star_O = phi fracn^star_f M_fn^star_O M_O$$For the given reaction, $n^star_f = 2$ and $n^star_O = 1$. Therefore$$ omega_O = frac12phi M_f/O 1 $$where $M_f/O$ is the ratio of molar mass of fuel (H$_2$) to oxygen O$_2$.The expression for $omega_f$ is found from a mass balance $omega_O omega_f = 1$.

get in touch with us
Рекомендуемые статьи
Multi Channel Laser Anti-theft Alarm Circuit
The figure shows the circuit of multi-channel laser anti-theft alarm. VT1, vt2, RL1, RP1, R1, K and vd6 constitute an optical control switch. During the day, the photoresistor RL1 is in a low resistance state under light, VT1 is saturated on, vt2 is off, relay K is not energized, normally open contact J is off, and the alarm circuit does not work; At night, RL1 changes to high resistance state, VT1 is cut off, vt2 is saturated and turned on, K is powered on to make j pull in, the circuit supplies power to the whole machine, the red LED is on, the regulated voltage is 6V, and supplies power to the subsequent circuit after voltage reduction by vd7, vd8 and vd9. Laser rods JB1, RL2, VT3, RP2, R3 and R4 form a laser transmitting and receiving network. When the alarm is in the waiting state, the laser rod emits red laser and irradiates it on the photoresist RL2. RL2 is in a low resistance state, and the base potential of VT3 is very low, which provides trigger current for thyristor vs, vs is turned on, IC2 is powered on, and the horn gives an alarm sound. The alarm can be equipped with up to 10 laser transmitting and receiving networks at the same time. The circuit structure is exactly the same, and C3 is an anti-interference capacitor. An is a reset switch. When the power grid is cut off or the gangster cuts off the power supply, the battery immediately supplies power to the whole machine, ensuring the reliability of the alarm device.Component selection: IC1 is voltage stabilizing integrated circuit 7806, and aluminum heat sink shall be added during use. IC2 is KD-9561 four sound chip, and the circuit is connected to the second sound selection terminal sel2 (fire truck alarm sound). The laser source is a red laser rod with voltage of 4.5V and power
How Do I Make My Go Kart Faster, Without Spending too Much Or Nothing?!?
What Solute Will Be Replaced by Liquid Electrolyte in Commercial Lithium Ion Battery?
Pool Stage
Introduction of Tubular Soil Moisture Monitoring Station
From the Perspective of Bridge Lighting System, the Use of LED Technology Has Become a Trend
Olar Energy Phone Charger Stand
Can Boiling Water Purify It? What's a Good Water Medium Sized Water Filter?
Precautions for Installation of Liquid Vortex Flowmeter
How Do I Connect My Desktops to Share the Internet?
Похожие Запросы
Under Which Situations Will Hydrogen and Oxygen Gas Form Water?
Multi Channel Laser Anti-theft Alarm Circuit
How Do I Make My Go Kart Faster, Without Spending too Much Or Nothing?!?
What Solute Will Be Replaced by Liquid Electrolyte in Commercial Lithium Ion Battery?
Pool Stage
Introduction of Tubular Soil Moisture Monitoring Station
From the Perspective of Bridge Lighting System, the Use of LED Technology Has Become a Trend
Olar Energy Phone Charger Stand
Can Boiling Water Purify It? What's a Good Water Medium Sized Water Filter?

Copyright © 2020 Concises YuGa Sports | Sitemap