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ss7ja [257]
3 years ago
11

In word equations, what do plus signs actually mean?

Chemistry
2 answers:
weqwewe [10]3 years ago
5 0
It means positive sign
shepuryov [24]3 years ago
3 0
<span>It means that your combining those two chemical substances</span>
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An atom of aluminum has 13 protons and 14 neutrons. what is the atomic mass
PtichkaEL [24]
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3 years ago
A mass of 100.0 g of NaCl is added to 100.0 mL of water, but not all of it dissolves. A mass of 59.5 grams of NaCl solid remains
Taya2010 [7]

Answer:

The molarity of the dissolved NaCl is 6.93 M

Explanation:

Step 1: Data given

Mass of NaCl = 100.0 grams

Volume of water = 100.0 mL = 0.1 L

Remaining mass NaCl = 59.5 grams

Molar mass NaCl= 58.44 g/mol

Step 2: Calculate the dissolved mass of NaCl

100 - 59. 5 = 40.5 grams

Step 3: Calculate moles

Moles NaCl = 40.5 grams / 58.44 g/mol

Moles NaCl = 0.693 moles

Step 4: Calculate molarity

Molarity = moles / volume

Molarity dissolved NaCl = 0.693 moles / 0.1 L

Molarity dissolved NaCl = 6.93 M

The molarity of the dissolved NaCl is 6.93 M

8 0
2 years ago
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3 years ago
Need help with 14 please &amp; thank you
Andrei [34K]

Answer:

B

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