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katen-ka-za [31]
3 years ago
5

Someone help me with these questions please, asap.

Chemistry
2 answers:
pshichka [43]3 years ago
7 0

1. to improve how people live

2. a constraint???

thats all i got

svetoff [14.1K]3 years ago
5 0
I will try my best.
1. To improve how people live
2. A constraint
3. Test product safety
4. None of the above.
Sorry if any of them are wrong.
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The longer it takes sound from a Sonar to return to the ship....................
Vlad1618 [11]
The farther away the object is from the ship. For sound to bounce back, it has to travel there and back. Thus, the longer it's out there, the farther it is. 
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4 years ago
Which of the substances below would dissociate into ions when dissolved in water? Select all that apply.
dusya [7]

Answer:

B. NaBr

D. KOH

Explanation:

Below is the solubility rules given for you knowledge.

Salts of

  • Group 1 elements are soluble(Li^+, Na^+, K^+,Cs^+, Rb^+)
  • Ammonium ion is soluble (NH4^+)
  • The nitrate are generally soluble( NO3^-)
  • of Cl- , Br- , and I- are soluble, except Ag+ , Pb+2, and (Hg2)+2
  • most sulfate are soluble, except Ba+2, Ca+2,Pb+2, Ag+, Sr+2.
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  • most phosphate are insoluble except group 1 and NH+4  

so using the rules above

NaBr , KOH are soluble, Pb(OH)2 is slightly soluble and AgCl is not soluble.

7 0
3 years ago
What does the air in the troposphere do as it heats up from the sun?
Digiron [165]
It usually holds more water because of evaporation and makes the earth very hot.
3 0
3 years ago
6th grade Science!!
Salsk061 [2.6K]
C- wind sock and wind vane
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3 years ago
If the strike of a unit is 10 degrees west of north, what is the correct notation? A ONW10 B N10W C Northwest 10 D) S10E​
IgorC [24]

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N10W

Explanation:

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correct notation is N10W if the strike of a unit is 10 degrees west of north.

6 0
2 years ago
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