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3 years ago

At standard pressure which substance becomes less soluble as temperature increases from 10. °c to 80.°c

1 answer:

5 0

20 At standard pressure, which substance becomes less soluble in water as temperature increases from 10.oC to 80.OC? (1) HCl (2) KCl (3)NaCl (4)NH4Cl1Use Table G, HCl is a gas and slopes down

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A woman runs a marathon in 90 ºf weather and replaces all volume lost in sweat by drinking distilled water. After the marathon,

gayaneshka [121]

Answer:

Total body water (TBW) will be unchanged because the woman replaced all volume lost in sweat by drinking water. Hematocrit will be increased because of the shift of water from ECF to ICF and the shift of water into the red blood cells (RBCs), which causes their volume to increase.

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2 years ago

A supersonic jet is flying west at one-third of its maximum speed. The jet's top speed is 4,500 kilometres per hour. If the jet'

lana [24]

Answer:

2hrs

Explanation:

Given parameters:

Top speed of the jet = 4500km/hr

Distance = 3000km

Unknown:

Time it will take = ?

Solution:

Velocity is the displacement divided by time.

Velocity = $\frac{displacement}{time}$

Time = $\frac{displacement}{velocity }$

The jet flies at one - third its maximum speed;

So, speed of the jet = $\frac{1}{3}$ x 4500 = 1500km/hr

Time = $\frac{3000}{1500}$ = 2hrs

7 0

3 years ago

How many grams of NaCl are in 0.78 moles of NaCl? *

melomori [17]

The molar mass of NaCl is 23 + 35.5 = 58.5 g/mol, so the mass of the sample ia 0.78 × 58.5 = 45.63 g.

4 0

3 years ago

A blu-ray laser has a wavelength of 405nm. In what region of the electromagnetic spectrum is this radiation? What is its frequen

love history [14]

Answer:

It lies in in the visible region.

Frequency: is 7.407 × 10^-14 Hz

${ \bf{V = f \lambda}} \\ { \tt{3.0 \times {10}^{8} = f \times (405 \times {10}^{ - 9}) }} \\ { \tt{f = 7.407 \times {10}^{14} \: hertz}}$

Explanation:

V is speed of light.

f is frequency

lambda is the wavelength

8 0

2 years ago

A 0.80 L sample of gas has a temperature of 27°C and a pressure of 0.925 atm. How many moles of gas are present?

ololo11 [35]

Answer:

n= 0.03 moles

Explanation:

Using the ideal gas law:

PV=nRT

nRT=PV

n= PV/RT

n: moles

P: pressure in atm

V= volume in L

R= Avogadro's constant = 0.0821

T= Temperature in K => ºC+273.15

n= (0.925 atm)(0.80 L) / (0.0821)(300.15 K)

n= 0.03 moles

6 0

3 years ago