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FromTheMoon [43]
3 years ago
14

Why should you never heat a test tube that is closed?

Chemistry
2 answers:
Burka [1]3 years ago
4 0
It will explode.... I think
Ilya [14]3 years ago
3 0
It could explode if the tube was closed at both ends
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Observe this chemical reaction: <br> 4 Fe + 302– 2Fe2O3<br> How many reactants are there ?
kirza4 [7]

Answer:

2 Reactants

Explanation:

its the iron and oxygen

8 0
3 years ago
Read 2 more answers
A chemist needs to neutralize 25.5 L of 3.86 M chloric acid (HClO3). What mass of sodium hydroxide is
Karolina [17]

Answer:

3.94 × 10³ g

Explanation:

Step 1: Write the neutralization reaction

HClO₃ + NaOH = NaClO₃ + H₂O

Step 2: Calculate the moles of chloric acid that react

25.5 L of 3.86 M chloric acid is to be neutralized. The reacting moles are:

25.5L \times \frac{3.86mol}{L} =98.4mol

Step 3: Calculate the required moles of sodium hydroxide

The molar ratio of HClO₃ to NaOH is 1:1. Then, the reacting moles of NaOH are 98.4 moles.

Step 4: Calculate the mass of sodium hydroxide corresponding to 98.4 moles

The molar mass of NaOH is 40.00 g/mol.

98.4mol \times \frac{40.00g}{mol} =3.94 \times 10^{3} g

6 0
3 years ago
Helppp will give brainlist
NikAS [45]

For #7, both hydrogen and oxygen are nonmetals, making it not A,

B would be the correct answer

For #8, chemical properties is the characteristic of a substance observed in a chemical reaction, A and B would be physical.  C would be correct

hope this helped

6 0
3 years ago
Read 2 more answers
REALLY NEED HELP WITH THESE CHEM QUESTIONS!! IF GOOD AT CHEM PLEASE HELP WILL GIVE BRAINLIEST AND WORTH 30 POINTS!
astraxan [27]
The missing isotope in the equation is going to have the atomic mass and atomic number as the difference between the numbers of the other isotopes mass and atomic number respectively.
atomic mass 210-206= 4
atomic number 84-82= 2
the symbol has to correspond to the element with the atomic number. In this case 2 = He
6 0
3 years ago
I need help as soon as posible
In-s [12.5K]
2. CO
3.O2
4.NH3
5.NO
6.NO2
7.CO2
8.H2
3 0
4 years ago
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