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SpyIntel [72]
3 years ago
10

What is the only type of invertebrate that may be smarter than some vertebrates?

Chemistry
2 answers:
Stolb23 [73]3 years ago
8 0
I think the best answer would be D. Dolphin!
bulgar [2K]3 years ago
7 0
D.
Dolphins is the answer I think
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Connects the arteries to the veins.
Nitella [24]

Answer:

D, capillaries

Explanation:

Capillaries connect the two.

7 0
3 years ago
Calculate the pH of the solution that results when 20 mL of 0.2M HCOOH is mixed with 25mL of 0.2M NaOH solution.(post-equivalenc
Paul [167]

The pH of the solution : 12

<h3>Further explanation</h3>

Reaction

HCOOH    +     NaOH   ⇒     HCOONa   +   H₂O

mol HCOOH =

\tt 20~ml\times 0.2~M=4~mlmol

mol NaOH =

\tt 25~ml\times 0.2~M=5~mlmol

Mol NaOH>mol HCOOH ⇒ at the end of the reaction there will be a strong base remains from mol NaOH, so that the pH is determined from [OH⁻]

ICE method :

HCOOH    +     NaOH   ⇒     HCOONa   +   H₂O

4                          5

4                          4                     4                   4

0                          1                      1                    1

Concentration of [OH⁻] from NaOH :

\tt \dfrac{1~mlmol}{20+25~ml}=0.02

pOH=-log[OH⁻]

pOH=-log 10⁻²=2

pH+pOH=14

pH=14-2=12

3 0
3 years ago
Consider the balanced reaction: 4Ga(s) + 3O2(g)⟶ 2Ga2O3(s)
Paha777 [63]

First we need to find the number of moles that 43.9g of gallium metal is. We can do this by finding the molar weight of gallium and cross-multiplying to cancel out units:


\frac{1mole}{69.723g}*\frac{43.9g}{1}=0.63mol_{Ga}


So we are dealing with 0.63 moles of gallium metal.


We can take from the balanced equation that 4 moles of gallium metal will react completely with 3 moles of oxygen gas. We can take this ratio and make a proportion to find the amount of oxygen gas, in moles, that will react completely with 0.63 moles of gallium metal:


\frac{4moles_{Ga}}{3moles_{O_{2}}} =\frac{0.63moles_{Ga}}{xmoles_{O_{2}}}


Cross multiply and solve for x:


4x=1.89


x=0.47moles_{O{2}}


So now we know that 0.47 moles of oxygen gas will react with 43.9g of gallium metal.

5 0
3 years ago
Carbon burns with oxygen to produce carbon dioxide gas. Which of these shows the correct chemical reaction? CO2 = C + O C + O =
kiruha [24]

Answer:

C(s) + O2(g) 》CO2 (g)

Explanation:

to check CO2 is release mix the gas with quick lime you see colour is change

4 0
3 years ago
Read 2 more answers
A deep sea diver must descend and ascend in short steps
Black_prince [1.1K]
A deep-sea diver must descend and ascend in short steps to equalize pressure on his body.
4 0
2 years ago
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