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Bogdan [553]
3 years ago
8

300×175 Express your answer using the correct number of significant figures.

Chemistry
1 answer:
icang [17]3 years ago
3 0

Answer:

300×175=52500

Explanation:

caculator

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el nitrogeno es un gas que se utiliza para conservar embriones,su temperatura es de -195,8ºc calcula esta temperatura en K y ºF
kipiarov [429]
Answer:
            -195.8 °C  =  77.35 K  =  -320.44 °F 

Explanation:

Temperature is commonly measured in following three scales;

1) Kelvin

2) Fahrenheit<span> 

3) </span>Celsius<span> 

Other scales are Rankine, Romer, Newton, Delisle e.t.c

Temperature given is -195.8 </span>°C. Degree Celsius is related to Kelvin and Fahrenheit as follow,

Celcius to Kelvin;
 
                          K  =  °C + 273.15
So,
                          K  =  -195.8 + 273.15

                          K  =  77.35 

Celcius to Fahrenheit;

                         
°F  =  °C × 9/5 + 32
So,
                         °F  =  -195.8 × 9/5 + 32

                         °F  =  -320.44
8 0
3 years ago
How many valence electrons are in the outermost energy level of each of the following elements? A. Helium B. Lithium C. Nitrogen
aleksklad [387]
<span>A. Helium </span>atomic number 2
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8 0
2 years ago
HELP PLZ !!! 15 points
Ulleksa [173]
Hi I’m here, what can I do to help
3 0
3 years ago
Read 2 more answers
Write Qc for each of the following:(1) Gaseous sulfur tetrafluoride reacts with liquid water to produce gaseous sulfur dioxide a
snow_tiger [21]

Answer : The expression for reaction quotient will be :

(1) Q_c=\frac{[SO_2][HF]^4}{[SF_4]}

(2) Q_c=\frac{[O_2]^2[Xe]}{[XeF_2]}

Explanation :

Reaction quotient (Q_c) : It is defined as the measurement of the relative amounts of products and reactants present during a reaction at a particular time.

(1) The given balanced chemical reaction is,

SF_4(g)+2H_2O(l)\rightarrow SO_2(g)+4HF(g)

In this expression, only gaseous or aqueous states are includes and pure liquid or solid states are omitted.  So, the expression for reaction quotient will be :

Q_c=\frac{[SO_2][HF]^4}{[SF_4]}

(2) The given balanced chemical reaction is,

2MoO_2(s)+XeF_2(g)\rightarrow 2MoF(l)+Xe(g)+2O_2(g)[/texIn this expression, only gaseous or aqueous states are includes and pure liquid or solid states are omitted.  So, the expression for reaction quotient will be :[tex]Q_c=\frac{[O_2]^2[Xe]}{[XeF_2]}

7 0
3 years ago
A sample of pure tin metal is dissolved in nitric acid to produce 15.00 mL of solution containing Sn2+. When this tin solution i
Rudik [331]

Answer:

1.00 M

Explanation:

Sn^2+ reacts with KMNO4 as follows;

5Sn^2+(aq) + 2MnO4^-(aq) + 16H^+(aq) ----> 5Sn^4+(aq) + 2Mn^+(aq) + 8H2O(l)

The number of moles of MnO4^- reacted = 42.1/1000 L × 0.145 mol/L

= 0.0061 moles

If 5 moles of Sn^2+ reacts with 2 moles of MnO4^-

x moles of Sn^2+ reacts with 0.0061 moles of MnO4^-

x= 5 × 0.0061/2

x= 0.015 moles

Since the volume of the Sn^2+ solution is 15.00mL or 0.015 L

number of moles = concentration × volume

Concentration = number of moles/volume

Concentration= 0.015 moles/0.015 L

Concentration = 1 M

6 0
3 years ago
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