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luda_lava [24]
3 years ago
10

Pollen

Chemistry
1 answer:
Leokris [45]3 years ago
5 0

Answer:

Yes! The above answer is correct.

Adding to it, your answer is option A.

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Calculate the mean rate of reaction when 23 cm<br> of gas<br> is produced in 15 seconds.
katrin2010 [14]

Answer:

1.53 cm/s

Explanation:

Rate = Length/time

        = 23/15

        = 1.53 cm/s

<u>BRAINLIEST?</u>

<u>PRETTY SURE IT IS.</u>

3 0
2 years ago
Why is it important to keep the two sides of an equation balanced when solving? what other properties do we use to rewrite expre
kompoz [17]

Answer:

<u>Why is it important to keep the two sides of an equation balanced when solving?</u>

If two expressions are equal to each other, and you add the same value to both sides of the equation, the equation will remain equal. When you solve an equation, you find the value of the variable that makes the equation true.

<u>What other properties do we use to rewrite expressions and equations?</u>

State of matter

Please vote for Brainliest and I hope this helps!

4 0
2 years ago
What is the bohr model for pottasium
guapka [62]
Potassium is an alkali metal with the chemical symbol K. It has an atomic number of 19, meaning that it has 19 positively charged protons. It also contains 19 electrons, which have a negative charge, and 20 neutrons, which do not hold a charge
Hope this help
7 0
3 years ago
The molar heat of fusion of gold is 12.550 kJ mol–1. At its melting point, how much mass of melted gold must solidify to release
KATRIN_1 [288]

The mass of melted gold to release the energy would be  3, 688. 8 Kg

<h3>How to determine the mass</h3>

The formula for quantity of energy is given thus;

Q = n × HF

Where n represents number of moles

HF  represents  heat of fusion

To find the number of moles, we have

235.0 = n × 12.550

number of moles = \frac{235}{12. 550} = 18. 725 moles

Note that molar mass of Gold is 197g/ mol

Let's note that;

Number of moles = mass/ molar mass

Mass = number of moles × molar mass

Mass = 18. 725 × 197

Mass = 3, 688. 8 Kg

Thus, the mass of melted gold to release the energy would be  3, 688. 8 Kg

Learn more about molar heat of fusion here:

brainly.com/question/15634085

#SPJ1

8 0
1 year ago
Su şeker karışımını ayırma yöntemi nedir arkadaşlar
Alinara [238K]
<span>Suda karıştırıldıysa, kaynatma ile hacmi azaltmayı deneyebilirsiniz, ancak bir veya daha fazla çözüm bulunmaması durumunda çok uzun sürecektir. Çözeltiye fazla aseton ilavesi, filtrelenebilen tuzu çöktürmelidir. Asetondan buharlaşma şeker üretecektir.</span>
3 0
3 years ago
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