2 years ago

Need help is label a warm area or is b Orr are they both warm

Chemistry

1 answer:

Galina-37 [17]2 years ago

4 0

Answer:

your image is a blavk screen so we cant tell

Explanation:

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Karolina [17]

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2 years ago

The vapor pressure of ethanol at its normal boiling point would be

Galina-37 [17]

The normal boiling point<span> of </span>ethanol<span> is 78.4 degrees C and, at thistemperature, </span>the vapor pressure<span> is 101325 Pascals (Pa) or 760manometric units

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2 years ago

Lanthanium found in the......... period

Gnesinka [82]

I'm preatty sure it is in the periodic table xxx

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2 years ago

What mass of NaCl would you have dilute to 1L to make up a 0.25M solution?<br> Asap please

gavmur [86]

Answer: 0.25m

Im not sure but i think

Explanation:0.25/0.25

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2 years ago

could you please explain operations with scientific notation using this example. 5 × 10³ + 4.3 × 10⁴ i dont understand how to so

TEA [102]

Explanation:

The scientific notation:

$a\times10^k$

where

$1\leq a$ and k is integer.

We have the example:

$(5\times10^3)+(4.3\times10^4)$

You can write the numbers in a "normal" form:

$5\times10^3=5\times1000=5000\\\\4.3\times10^4=4.3\times10000=43000$

Make the sum:

$5000+43000=48000$

And next write it in the scientific notation:

$48000=4\underbrace{8000}_{\leftarrow4}=4.8000\times10000=4.8\times10^4$

<h3>Other method:</h3>

You can add numbers in scientific notation if the power of tens in both number is the same.

Therefore you must convert the first number:

$5\times10^3=0.5\times10\times10^3=0.5\times10^4$

Now, you can make the sum:

$(5\times10^3)+(4.3\times10^4)=0.5\times10^4+4.3\times10^4=(0.5+4.3)\times10^4=4.8\times10^4$

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2 years ago