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frutty [35]
3 years ago
6

What three mechanisms regulate the heart

Chemistry
1 answer:
Kazeer [188]3 years ago
5 0
The SA node, the cardiac center in the medulla oblongata, and the endocrine system
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What mass of agno3 can be dissolved in 250g of water at 20°c?
Mice21 [21]
Hello there,

You should know the <span>solubility of AgNO3 in water at 20°C equals to 2220 g/L.

So we can say that in 1 L of water, 2220 g of AgNO3 can be dissolve.

Now you should know 1L = 1000g.

Which means 1000 g of water can dissolve 2220 g of AgNO3.

Therefore :

</span>250 g<span> --> x
1000 g --> 2220 g

So : </span>x = \frac{250*2220}{1000} =  \frac{555000}{1000}= 555g.

In short, 555g of AgNO3 can be dissolved in 250g of water at 20°C.

Hope this helps !

Photon
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3 years ago
cuantos electrones se necesitan para formar una carga -38uC sabiendo que la carga de un solo electrón es -1.6×10-19 C???​
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When two ionic compounds are dissolved in water, a double replacement reaction can... Group of answer choices occur if two of th
sergey [27]

Answer:

occur if two of the ions form an insoluble ionic compound, which precipitates out of solution

Explanation:

When two ionic compounds are dissolved in water, a double replacement reaction takes place if two of the ions form an insoluble ionic compound, which precipitates out of solution. In double displacement reaction ions switch partners. And hence, produce an insoluble precipitate.

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