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Yakvenalex [24]
3 years ago
9

Choose all the right answers.

Chemistry
2 answers:
stiv31 [10]3 years ago
8 0

a unicellular organism and a plant or an animal

Strike441 [17]3 years ago
7 0

Answer: a unicellular organism & plant or animal

Explanation: a organism is any unicellular plant, animal or single celled life form.

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What element has 2 electrons in the 4s sub level?
ruslelena [56]

is the Calcium because the calcium in group two which group two has 2 electron and also calcium and Potassium 4s sub level group potassium has 1 electron. :)


4 0
3 years ago
How viscosity affects the speed of the liquid in the convection cell.
Fed [463]

Explanation:

eggsus8d8ruttuririiryrey

6 0
2 years ago
A 90.00 mL solution of NaCl and ethyl alcohol has 7.83 g of salt dissolved in the alcohol. Calculate the molar concentration of
nalin [4]
The  molar  concentration  of the solution  is calculated as  follows

find the moles of NaCl used  to  make the solution

moles =  mass/molar  mass
mass =7.83  g
molar  mass =58.5  g/mol
moles = 7.83 g/ 58.5 g/mol = 0.134 moles

molarity (  concentration  in mol/l) =  number  of moles/volume  in  liters

volume  in liters =  90ml/1000 =0.09  liters

molarity  is  therefore = 0.134  moles/0.09 L =1.49   M


8 0
3 years ago
Read 2 more answers
Para saber si se lleva a cabo una reacción donde un metal desplaza a otro metal de su sal u otro compuesto, es preciso:
olga_2 [115]

Answer:

Explanation:

¡Hola!

En este caso, dado que las reacciones de desplazamiento simple se llevan a cabo cuando un metal desplaza a otro metal de su sal u otro compuesto, es preciso tener en cuenta la serie de reactividad de los metales que se muestra en el archivo adjunto.

Así, es mandatorio que el metal con el que la sal original reacciona, sea más reactivo que el catión de la misma, de modo contrario, la reacción tendría lugar. Por ejemplo, si el sodio reacciona con cloruro de zinc, al este primero estar más arriba en la serie, quiere decir que es capaz de desplazar el zinc en el cloruro original y así se formaría zinc metálico y cloruro de sodio.

¡Saludos!

4 0
2 years ago
Is calcium hydroxide an ionic compound, covalent compound, or acid?
elena55 [62]

Answer:

Calcium Hydroxide is an ionic compound

6 0
3 years ago
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