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Tanzania [10]
3 years ago
9

if lance armstrong is riding his bicycle at speeds of 15 m/s, how long will it take him to travel 81.9 meters?

Chemistry
2 answers:
Leona [35]3 years ago
4 0

Answer:

5.46

Explanation:

wlad13 [49]3 years ago
4 0

Answer: 5.46

Explanation:

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Which statement is true for nuclear reactions but not for chemical reactions?
IrinaVladis [17]

Answer:maybe C

Explanation:

4 0
2 years ago
Read 2 more answers
Dissolved hydrofluoric acid reacts with dissolved sodium hydroxide to form water and aqueous sodium fluoride
GalinKa [24]

Answer:

HF(aq)+NaOH(aq)→NaF(aq)+H2O(l)

Explanation:

Complete question

Dissolved hydrofluoric acid reacts with dissolved sodium hydroxide to form water and aqueous sodium fluoride. What is the net ionic equation

Equilibrium equation between the undissociated acid and the dissociated ions

HF(aq)⇌H+(aq)+F−(aq)

Sodium hydroxide will dissociate aqueous solution to produce sodium cations, Na+, and hydroxide anions, OH−

NaOH(aq)→Na+(aq)+OH−(aq)

Hydroxide anions and the hydrogen cations will neutralize each other to produce water.

H+(aq)+OH−(aq)→H2O(l)

On combining both the equation, we get –  

HF(aq)+Na+(aq)+OH−(aq)→Na+(aq)+F−(aq)+H2O(l)

The Final equation is  

HF(aq)+NaOH(aq)→NaF(aq)+H2O(l)

5 0
3 years ago
What are the coefficients to balance the following equation?<br> ba+br=babr2
scoray [572]
1 ba+2 br——>1 babr2

u just have to make sure u have the same number of each type of atom on either side of the equation:)
8 0
3 years ago
HELP. Answer as much as possible. Thnx.​
blondinia [14]

Answer:4

Explanation:

6 0
3 years ago
What is the ph of a solution of 0.550 m k2hpo4, potassium hydrogen phosphate?
Solnce55 [7]
We assume that we have Ka= 4.2x10^-13 (missing in the question)
and when we have this equation:
H2PO4 (-) → H+  + HPO4-
and form the Ka equation we can get [H+]:
Ka= [H+] [HPO4-] / [H2PO4] and we have Ka= 4.2x10^-13 & [H2PO4-] = 0.55m
by substitution:
4.2x10^-13 = (z)(z)/ 0.55
z^2 = 2.31x 10^-13
z= 4.81x10^-7
∴[H+] = 4.81x10^-7
when PH equation is:

PH= -㏒[H+]
     = -㏒(4.81x10^-7) = 6.32

3 0
3 years ago
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