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mina [271]
4 years ago
12

Evidence of a chemical reaction includes all of the following EXCEPT: A. baking soda and vinegar release gas bubbles B. while ch

ewing a cookie, it becomes smaller pieces so you can swallow it C. heat is generated after mixing 2 chemicals
Chemistry
1 answer:
Bumek [7]4 years ago
3 0

Answer:

B.

Explanation:

Chemical reaction have to have either a temp change, formation of precipitate, formation of gas, or color change.

- Hope that helps! Please let me know if you need a further explanation.

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Calcium, magnesium, and strontium are near each other on the periodic table and have some characteristics in common, but they di
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Strontium, Calcium, Magnesium

Strontium is the most reactive of the three element because of this, it does not exist free in nature but rather exist in combination with other elements in various compounds such as strontianite. Calcium is more reactive than magnesium because it is larger than magnesium and thus, it is more electropositive in nature.

7 0
4 years ago
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Tyrone mixes some chemicals together. He notices that the mixture gives off heat and is hot to touch. What type of reaction is t
Brrunno [24]
Chemical, if it gives off a reaction like that its chemical
6 0
3 years ago
Suppose you had used the same flask for preparing the standard solution and the dilution. How would the concentration of the dil
mixer [17]

Answer:

Explanation:

We were told to rinse the buret with the base so that the concentration won't be messed up, but when it comes to the flask that is going to hold the acid, there is no need to rinse, because it would not affect the result if it has water in it.

8 0
3 years ago
Which bonds are found inside a water molecule, between hydrogen and oxygen?
Papessa [141]
Hydrogen bond is found between water molecule if im correct
5 0
3 years ago
A 519.93 gram sample of N2O is in a 7.05 L container. What is the pressure of the gas in atmospheres when the temperature is 125
Brut [27]

Answer:

17.27 atm

Explanation:

Use the ideal gas law or PV = nRT

We are solving for pressure here so lets isolate for P before we plug in values:

P = \frac{nRT}{V}

So first to get n or the number of moles we need to convert the grams of N2O to moles of N2O. We can do this by multiplying by the inverse of the molar mass like so:

\frac{519.93g(N2O)}{1} \frac{mol}{44.013g(N2O)}

Our grams of N2O would cancel and give us 11.813 mol of N2O

Now all thats left is to plug in and solve with the correct value for R which in this case for all of our units to cancel is 0.08206

P = \frac{(11.813)(0.08206)(125.63)}{7.05}

P = 17.27 atm

(I would double check the calculator work if it is for correctness just be sure)

4 0
3 years ago
Read 2 more answers
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