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goldfiish [28.3K]
3 years ago
7

"how is the stomach lining protected from the strongly acidic ph of its contents?"

Chemistry
1 answer:
SIZIF [17.4K]3 years ago
6 0
It is protected by a mucus layer formed on the surface regularly that ressist ph values.If it isn't formed our body will eat itself.
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Neptune is 30 AU (astronomical units) from the sun. How long, in light minutes, would it take for light from the sun to reach Ne
shtirl [24]

Answer:

250 light minutes takes

Explanation:

1 astonomical unit is equal to 1.50x10¹¹m

The light travels at the speed of 3.0x10⁸m/s. That means in 1 second, travels 3.0x10⁸m. To solve this question we must find the distance of neptune to the sun in meters. In this way we can find the seconds (And minutes) that need the light to travel from the sun to neptune:

<em>Distance from Sun to neptune:</em>

30AU * (1.50x10¹¹m / 1AU) = 4.5x10¹²m

<em>Time transcurred:</em>

4.5x10¹²m * (1s / 3.0x10⁸m) = 15000s

15000s * (1min / 60s) =

<h3>250 light minutes takes</h3>

7 0
3 years ago
To conclude through reasoning from something known or assumed is to ___.
sp2606 [1]
Is it to hypothesize?
6 0
3 years ago
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Find the mass of 5.82 mol of MgCl2. Round to the nearest tenth.
Oksana_A [137]

Answer:

554.13 grams

Explanation:

8 0
3 years ago
Where is earths mantle located
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<span>it is located directly under the sima</span>
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Find the mass in grams of 4.52
Tanzania [10]

Answer:

Mass = 1274 .64 g it would be option C if it is converted into kilogram

1274 .64 / 1000 = 1.27 Kg

Explanation:

Given data:

Number of moles of C₂₀H₄₂ = 4.52 mol

Molar mass of carbon = 12 g/mol

Molar mass of hydrogen = 1.0 g/mol

Mass of C₂₀H₄₂ = ?

Solution:

Number of moles = mass / molar mass

Molar mass = 20× 12 + 42× 1.0 = 282 g/mol

Now we will put the values in formula:

Number of moles = mass / molar mass

4.52 mol = mass / 282 g /mol

Mass = 4.52 mol × 282 g/mol

Mass = 1274 .64 g

7 0
3 years ago
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