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natima [27]
4 years ago
9

How would you write a balanced equation for the combustion of zinc sulfide?

Chemistry
1 answer:
lara31 [8.8K]4 years ago
6 0

Answer:

The solution is: ZnS + O^2 => ZnSO

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What is the pressure of 5.0 mol nitrogen gas in a 2.0 L container at 286 K
g100num [7]
The "Ideal Gas Law Equations" is 
PV=nRT
P= Pressure (in Pascals)
V=Volume (in Liters)
n=amount, or <u>n</u>umber (in moles)
R= 8.3145 \frac{Pascals*Liters}{Moles*Kelvin} or \frac{PaL}{molK}
T= Temperature (In Kelvin)

P= \frac{nRT}{V}

Plug into the equation and you're good!
P=\frac{nRT}{V}
P =\frac{(5mol)(8.3145)(286K)}{2L}
P=5944.8675Pa

If your teacher cares about sig figs,
2 sig figs (significant figures)
P=5900Pa

For other units of pressure,
1 atm = 760 mmHG = 760 Torr = 101326 Pa = 1.01325 bar<u />
5 0
4 years ago
An enzyme is discovered that catalyzes the chemical reaction:SAD --------&gt;HAPPY
jekas [21]

Answer: Km = 10μM

Explanation: <u>Michaelis-Menten constant</u> (Km) measures the affinity a enzyme has to its substrate, so it can be known how well an enzyme is suited to the substrate being used. To determine Km another value associated to an eznyme is important: <em>Turnover number (Kcat)</em>, which is the number of time an enzyme site converts substrate into product per unit time.

Enzyme veolcity is calculated as:

V_{0} = \frac{E_{t}.K_{cat}.[substrate]}{K_{m}+[substrate]}

where Et is concentration of enzyme catalitic sites and has to have the same unit as velocity of enzyme, so Et = 20nM = 0.02μM;

To calculate Km:

V_{0}*K_{m} + V_{0}*[substrate] = E_{t}.K_{cat}.[substrate]

K_{m} = \frac{E_{t}.K_{cat}.[substrate]-V_{0}*[substrate]}{V_{0}}

K_{m} = \frac{0.02*600*40-9.6*40}{9.6}

Km = 10μM

<u>The Michaelis-Menten for the substrate SAD is </u><u>10μM</u><u>.</u>

3 0
3 years ago
In one or two sentences, explain why the combined weight of several liquids mixed in an open flask can be less than but never mo
Rasek [7]

Answer:

Liquids in a form of mixture has less weight as compared to sum of all liquid's weight due to release of gases.

The combined weights of several liquids mixed in an open flask be less than the sum of all the weights of the liquids because when the reaction occurs new products are formed and also some gases which releases in the atmosphere.

These gases also contribute in the weight of the product so when it is released the weight of the mixture of liquids are less than the sum of the weights of all liquids so we can conclude that liquids in a form of mixture has less weight as compared to sum of all liquid's weight.

Explanation:

4 0
3 years ago
Read 2 more answers
What causes the rock layers of mountains to form zigzag shape?
creativ13 [48]
Answer =B) folding of rock
4 0
3 years ago
Number of moles in 145.7 g of squaric acid
Nesterboy [21]
To find moles : moles= Mass (C₄H₂O₄) / RFM (C₄H₂O₄)

so moles = 147.7 / 114 = <span>1.2956mol

hope that helps </span>
3 0
3 years ago
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