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oksano4ka [1.4K]
3 years ago
11

How do you write 400000 in scientific notation?

Chemistry
2 answers:
Sidana [21]3 years ago
7 0
4x10^2 pls brainliest me
Andrej [43]3 years ago
6 0

Answer:

4 x 10 5

Explanation:

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Which of the following statements are true? Heat is converted completely into work during isothermal expansion. Isothermal expan
icang [17]

Answer:

Heat is converted completely into work during isothermal expansion

Explanation:

first law:

  • ΔU = Q + W

∴ ΔU = CvΔT = 0....isothermal

⇒ Q = - W

5 0
4 years ago
When considering light moving through a diffraction grating, you should treat the light as what?
liraira [26]

Answer:

A particle

Explanation:

Modern quantum theory holds that light has both wave-like and particle-like properties. When the length scales involved are large compared to the wavelengths of light (ex., forming images with thin lenses), the

particle nature of light dominates.

5 0
3 years ago
Read 2 more answers
2 Which two substances cause iron to rust?
guapka [62]

Answer:

water and oxygen

Explanation:

this is because

iron + water + oxygen ----> hydrated iron (III) oxide (which is rust in lame terms )

hope this helps

please mark it brainliest

8 0
3 years ago
What are two processes that result in rocks being broken down into smaller pieces !?
Snowcat [4.5K]
<span>"Chemical weathering and physical weathering" would be the correct answer

Chemical weathering breaks down the bonds holding the rocks together, and the physical weathering will crush and break them apart.</span>
7 0
3 years ago
What mass of sucrose (C12H22O11) should be combined with 546 g of water to make a solution with an osmotic pressure of 8.80 atm
lesya [120]

<u>Answer:</u> The mass of sucrose required is 69.08 g

<u>Explanation:</u>

To calculate the concentration of solute, we use the equation for osmotic pressure, which is:

\pi=iMRT

Or,

\pi=i\times \frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}\times RT

where,

\pi = osmotic pressure of the solution = 8.80 atm

i = Van't hoff factor = 1 (for non-electrolytes)

Mass of solute (sucrose) = ?

Molar mass of sucrose = 342.3 g/mol

Volume of solution = 564 mL    (Density of water = 1 g/mL)

R = Gas constant = 0.0821\text{ L.atm }mol^{-1}K^{-1}

T = Temperature of the solution = 290 K

Putting values in above equation, we get:

8.80atm=1\times \frac{\text{Mass of sucrose}\times 1000}{342.3\times 546}\times 0.0821\text{ L.atm }mol^{-1}K^{-1}\times 290K\\\\\text{Mass of sucrose}=\frac{8.80\times 342.3\times 546}{1\times 1000\times 0.0821\times 290}=69.08g

Hence, the mass of sucrose required is 69.08 g

5 0
3 years ago
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