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kakasveta [241]
3 years ago
6

Can someone help me, please?

Chemistry
1 answer:
Korolek [52]3 years ago
6 0
6.B. NADPH and 8.B. ETHYNE
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Select the correct answer. Which substance is made of polymers? A. marble B. protein C. salt D. steel
Greeley [361]

Answer:

the answer is B proteins

Explanation:

brainliest pls

4 0
3 years ago
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50.0 mL of a solution of HCl is combined with 100.0 mL of 1.05M NaOH in a calorimeter. The reaction mixture is initially at 22.4
VikaD [51]

Answer:

2.1 M is the molarity of the HCl solution.

Explanation:

HCl+NaOH\rightarrow H_2O+NaCl

Molarity of HCl solution = M_1=?

Volume of HCl solution = V_1=50.0mL

Ionizable hydrogen ions in HCl = n_1=1

Molarity of NaOH solution = M_2=1.05 M

Volume of NaOH solution = V_2=100.0 mL

Ionizable hydroxide ions in NaOH = n_2=1

n_1M_1V_1=n_2M_2V_2 (neutralization )

M_1=\frac{M_2V_2}{V_1}=\frac{1.05M\times 100.0 mL}{50.0 mL}

M_1=2.1 M

2.1 M is the molarity of the HCl solution.

3 0
3 years ago
your aunt tells you that she gets cold when the temperature falls below 60 degrees. does she mean Celsius or degrees Fahrenheit?
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8 0
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Can someone answer that first this pls im lost
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What exactly does the 2+ mean on element Fe2+?
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