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2 years ago

How many of the zeros in the measurement 0.050060 are significant

Chemistry

2 answers:

Feliz [49]2 years ago

6 0

I think 3 of them are its been 1 half years since ive done this i dont take chemistry anymore

earnstyle [38]2 years ago

6 0

3 of them are significant. Two are sandwiched by nonzero significant numbers and since there is a decimal in the number, the zero on the end is also significant

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Which of the following is the test for oxygen has?

dem82 [27]

A or B depends on what you mean by lit or glowing but when you place a wooden split in the sample the gas must reignite but there can be some confusion between hydrogen and oxygen mainly because a splint can cause a slight popping sound while it reignites but hydrogen pops are more violent and can most time extinguish the splint.

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3 years ago

The specific gravity of gold is 19.3. What is the length of one side of a 0.4 kilograms cube of solid gold, in units of inches?

zepelin [54]

Specif gravity = density of the material / density of water

density of the material = specific gravity * density of water

density of gold = 19.3 * 1 g/mL = 19.3 g/mL

density = mass / volume ==> Volume = mass / density

Volume = 0.4 kg * 1000 g/kg / 19.3 g/mL = 20.725 mL

Length of one side of the cube = $\sqrt[3]{20.725 {cm}^{3} }$ = 2.75 cm

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2 years ago

Read 2 more answers

How many liters of oxygen gas can react with 84.0 grams of lithium metal at standard temperature and pressure? Show all of the w

ddd [48]

From the equation:
4mol Li react with 1 mol O2
Molar mass Li = 7g/mol
mol in 84g Li = 84/7 = 12 mol Li
From the equation - 12 mol Li will react with 3 mol O2

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2 years ago

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What is the energy in joules of one photon of microwaveradiation with a wavelength 0.122m?

pentagon [3]

Answer: The energy of photon is $162.93\times 10^{-26}J$

Explanation:

The relation between energy and wavelength of light is given by Planck's equation, which is:

$E=\frac{hc}{\lambda}$

where,

E = energy of the light = ?

h = Planck's constant = $6.626\times 10^{-34}Js$

c = speed of light = $3\times 10^8m/s$

$\lambda$ = wavelength of photon = 0.122 m

Putting values in above equation, we get:

$E=\frac{(6.626\times 10^{-34}Js)\times (3\times 10^8m/s)}{0.122m}\\\\E=162.93\times 10^{-26}J$

Hence, the energy of photon is $162.93\times 10^{-26}J$

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2 years ago

What is the pH of 0.0001 M NaOH

kow [346]

Well. NaOH is a base. That's the first thing you need to watch for.
So to find the pOH, you take -log(.0001)
that would be 4. So now you have the pOH and you still need to find the pH
To find pH from pOH, you take 14(the maximum pH,sorta)-pOH(in this case 4)
14-4=10 The pH of NaOH is 10

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2 years ago