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balandron [24]
3 years ago
15

Answer yes or no for each question:

Chemistry
2 answers:
Eva8 [605]3 years ago
8 0
No, no, yes. i think
Usimov [2.4K]3 years ago
3 0
1) No 2) No 3) yes hope you do well
You might be interested in
How many square centimeters are in an area of 8.50 inch^2
Paha777 [63]

Explanation:

Given parameters:

  Dimension = 8.5in²

we are to convert from in² to cm²

 in² = in x in

 cm² = cm x cm

   1 in = 2.54cm

Using dimensional analysis;

   8.5in² x \frac{2.54cm}{1in}  x \frac{2.54cm}{1in}

        =  54.84cm²

We solved this problem using dimensional analysis where we multiplied the unit with 1.

learn more:

Conversion brainly.com/question/555814

#learnwithBrainly

5 0
3 years ago
SHOW WORK
Katyanochek1 [597]

M
a
= 6.77M - the initial molarity (concentration)
V
a
= 15.00 mL - the initial volume
M
b
= 1.50 M - the desired molarity (concentration)
V
b
= (15.00 + x mL) - the volume of the desired solution
(6.77 M) (15.00 mL) = (1.50 M)(15.00 mL + x )
101.55 M mL= 22.5 M mL + 1.50x M
101.55 M mL - 22.5 M mL = 1.50x M
79.05 M mL = 1.50 M
79.05 M mL / 1.50 M = x
52.7 mL = x
59.7 mL needs to be added to the original 15.00 mL solution in order to dilute it from 6.77 M to 1.50 M......



Also you kinda cute what’s up :)
4 0
3 years ago
Atomic symbol that has 29 protons
LekaFEV [45]
Copper atom has 29 protons and 34 neutrons in its nucleus
3 0
3 years ago
Calculate the hydronium ion, [ H30+], and hydroxide ion, [OH-], concentrations for a
mixer [17]

Answer:

[H3O+] = 0.0117 M

[OH-] = 8.5 * 10^-13 M

Explanation:

Step 1: Data given

Concentration of HCl = 0.0117 M

Step 2:

HCl is a strong acid

pH of a strong acid = -log[H+] = - log[H3O+]

[H3O+] = 0.0117 M

pH = -log(0.0117)

pH = 1.93

pOH =14 - 1.93 = 12.07

pOH = -log[OH+] = 12.07

[OH-] = 10^-12.07 = 8.5 * 10^-13

Or

Kw / [H3O+] = [ OH-]

10^-14 / 0.0117 = 8.5*10^-13

4 0
3 years ago
A chemical engineer must calculate the maximum safe operating temperature of a high-pressure gas reaction vessel. The vessel is
Inessa05 [86]

Answer:

T=2.78x10^3 \°C

Explanation:

Hello,

In this case, considering that the safe temperature may be computed via the ideal gas law as we now the pressure, mass and volume via the dimensions:

V=\pi r^2 h=\pi *(41.0cm)^2*49.2cm=2.60x10^5cm^3*\frac{1L}{1000cm^3} =260L

The pressure in atm is:

P=3.70MPa*\frac{1x10^6Pa}{1MPa} \frac{1atm}{101325Pa} =36.5atm

And the moles considering the mass and molar mass (66 g/mol) of dinitrogen difluoride (N₂F₂):

n_{N_2F_2}=2.50kg*\frac{1000g}{1kg}*\frac{1mol}{66g} =37.9mol

In sich a way, by applying the ideal gas equation, which is not the best assumption but could work as an approximation due to the high temperature, the temperature, with three significant figures, will be:

T=\frac{PV}{nR}=\frac{36.5Pa*260L}{37.9mol*0.082\frac{atm*L}{mol*K} }\\  \\T=3053.6K-273.15\\\\T=2.78x10^3 \°C

Best regards.

7 0
3 years ago
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