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Varvara68 [4.7K]
3 years ago
11

How many seconds elapsed in 2.0 hours

Chemistry
1 answer:
maxonik [38]3 years ago
8 0
60 seconds times 60 minutes is 3,600 seconds, or one hour. 3,600 times 2 is 7,200 seconds.
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The electron dot diagram for a neutral atom of chlorine (atomic number 17) is shown below.
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A. 35Cl1-

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Chlorine needs 1 more electron to have full octet thus will take 1 electron and possess a -1 charge.

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______is the condition of the atmosphere at any given time and place and ______is the weather over a long period of time (fill i
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Most atoms have no net charge because they have
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Atoms have no electric charge because the protons and electrons "cancel out" each others charges. Neutrons have no charge. What is the atomic number of an element? The atomic number is the number of protons in the atom's nucleus.

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6 0
3 years ago
Read 2 more answers
Can you please help me and can you show your work please
natali 33 [55]

Answer:

1. 25 moles water.

2. 41.2 grams of sodium hydroxide.

3. 0.25 grams of sugar.

4. 340.6 grams of ammonia.

5. 4.5x10²³ molecules of sulfur dioxide.

Explanation:

Hello!

In this case, since the mole-mass-particles relationships are studied by considering the Avogadro's number for the formula units and the molar mass for the mass of one mole of substance, we proceed as shown below:

1. Here, we use the Avogadro's number to obtain the moles in the given molecules of water:

1.5x10^{25}molecules*\frac{1mol}{6.022x10^{23}molecules} =25 molH_2O

2. Here, since the molar mass of NaOH is 40.00 g/mol, we obtain:

1.2mol*\frac{40.00g}{1mol} =41.2g

3. Here, since the molar mass of C6H12O6 is 180.15 g/mol:

45g*\frac{1mol}{180.15g}=0.25g

4. Here, since the molar mass of ammonia is 17.03 g/mol:

20mol*\frac{17.03g}{1mol}=340.6g

5. Here, since the molar mass of SO2 is 64.06 g/mol:

48g*\frac{1mol}{64.06g} *\frac{6.022x10^{23}molecules}{1mol} =4.5x10^{23}molecules

Best regards!

5 0
3 years ago
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