2 years ago

Which characteristics is ALWAYS true for all members of the plant kingdom

Chemistry

1 answer:

fgiga [73]2 years ago

6 0

Answer:

it is heterotrophic. it is unicellular. it does not have a nucleus.

Explanation:

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What would be the formula of the precipitate that forms when pb(no3)2 (aq) and k2so4 (aq) are mixed?

maria [59]

The formula of the ppt. formed is PbSo4 , which is inslouble.

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3 years ago

Cho 4g CuO vào dung dịch axit clohidric 10% thì phản ứng vừa đủ.

Sholpan [36]

Answer:

Explanation:

a. CuO+ 2HCl⇒CuCl2+ H2O

b. $n_{CuO}$ = $\frac{4}{80}$ = 0,05 (mol)

⇒ $n_{CuCl2}$ = $n_{CuO}$ =0,05 mol

⇒ $m_{CuCl2}$ = 0,05×135=6,75 (g)

c. $n_{HCl}$ =2× $n_{CuO}$ =0,1 (mol)

⇒ $m_{HCl}$ = 0,1×36,5= 3,65 (g)

⇒ $m_{dd HCl}$ = $\frac{m_{HCl}}{10}$ ×100=36,5 (g)

⇒ Nồng độ phần trăm dd sau phản ứng= Nồng độ % dd CuCl2= $\frac{m_{CuCl2} }{m_{dd HCl+ m_{CuO} } }$ ×100= $\frac{6,75}{36,5+4}$ ×100≈ 16,67%

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3 years ago

Give two examples of solutions that you might find or prepare in a kitchen.

amm1812

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3 years ago

• What policies might people put in place to conserve water levels in lakes and aquifers?

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Some policies they might do is to put limits on water usage, like making sure that people don't use too much water in baths and when they are tending to their gardens.

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Vegetable.

Asparagus lettuce.

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