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Nataly [62]
3 years ago
13

How can watching fish decrease heart rate ?

Chemistry
1 answer:
Leokris [45]3 years ago
3 0

Answer:

Explanation:

Whe it dies

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30.5 g of sodium metal reacts with chlorine gas to produce sodium chloride. How much (in grams) chlorine gas must react with thi
Lena [83]

Answer:

Mass of chlorine = 47.22 g

Explanation:

Given data:

Mass of sodium = 30.5 g

Mass of chlorine= ?

Solution:

Chemical equation:

 2Na + Cl₂      →      2NaCl  

Number of moles of Na:

Number of moles = mass/molar mass

Number of moles = 30.5g/ 23 g/mol

Number of moles = 1.33 mol

Now we will compare the moles of Cl ₂ with Na from balance chemical equation.

                    Na            :              Cl ₂

                     2              :               1

                     1.33          :            1/2×1.33 = 0.665 mol

Mass of chlorine gas:

Mass = number of moles × molar mass

Mass = 0.665 mol × 71 g/mol

Mass = 47.22 g

6 0
3 years ago
Relative to electrons and electron states, what does the ml quantum number specify
Anastaziya [24]
<span>Magnetic quantum number specify orientation of electrons in magnetic field </span>and number of electron states (orbitals) in subshells..
Magnetic quantum number (ml) specifies the orientation in space of an orbital of a given energy and shape . Magnetic quantum number divides the subshell into individual orbitals which hold the electrons, there are 2l+1 orbitals in each subshell. For example, p orbitals (and their electrons) have three orientations in spase (px, py and pz).
8 0
3 years ago
What is another name for a chemical change? A. chemical spill B. physical change C. physical property D. chemical reaction
Elenna [48]

The correct answer is D. chemical reaction.

5 0
4 years ago
Is it possible for number of moles to be less than one?​
Advocard [28]

Answer:

yes is very possible to be

8 0
3 years ago
What is the percentage by mass of copper in copper oxide (CuO)?
Viefleur [7K]

Answer:

79.89%

Explanation:

Copper has a molar mass of 63.55

Oxygen has a molar mass of 16.00

If you add these you get 79.55

To get the mass percent of copper divide copper by the whole. 63.55/79.55*100= 79.89%

7 0
3 years ago
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