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frez [133]
3 years ago
14

A science class did an experiment in which two substances were mixed. After 15 minutes, everything looks the same, but the stude

nts noticed an odor coming from the experiment. What does this likely indicate?
a.) a liquid was formed.
b.) a temperature change occurred
c.) a chemical reaction occurred
D.) a physical change occurred
Chemistry
2 answers:
valentinak56 [21]3 years ago
5 0

Answer:

C a chemical reaction formed

Explanation:

if something changes smell and nothing else it is a chemical reaction, every other answer does not make sense

Setler [38]3 years ago
5 0

Answer:

chemical reaction

Explanation:

nothing changed with the appearance of how it looks

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Nitrites are commonly found in what food?
makvit [3.9K]
Ham, bacon, sausages, salami, pastrami, hot dogs, and other processed meat that is cured, smoked, or salted. The nitrite is used to preserve them.
7 0
3 years ago
A sample of gas with a volume of 30.0 ml at 25.0c is heated to 50.0c what is the new volume of the gas
garik1379 [7]

Answer:

The new volume is 60ml

Explanation

using the equation p1v1/n1t1=p2v2/n2t2 we would divied 30 by 25 the multiply by 50 to get 60

7 0
2 years ago
A cracker crushed in water will test positive with iodine but negative with benedict’s solution. A
german
A cracker which contains starch,is test positive with iodine solution but not Benedict's solution. This is because Benedict's solution is used to test for reducing sugars like glucose,galactose,fructose,maltose and lactose.In this case, the cracker is added with amylase enzyme which hydolyses starch into maltose,thus benedict's solution is test positive
7 0
3 years ago
The strongest intermolecular interactions between propanol (CH3CH2CH2OH) molecules arise from hydrogen bonding
pickupchik [31]

The claim that the strongest intermolecular interactions between propanol molecules arises from hydrogen bonding is True.

Intermolecular forces are weaker attraction forces that are utilized to define physical characteristics of molecules such as:

  • boiling point
  • temperature
  • density
  • melting points

Hydrogen bonding is an type of intermolecular forces.

It is a type of dipole-dipole interaction that only happens when a hydrogen atom is connected to the atomic element of oxygen, nitrogen, or fluorine.

From the question given, in the propanol (CH3CH2CH2OH) molecule, the hydrogen usually has a partially positive charge which attracts the partially negative charge of the oxygen.

Therefore, we can conclude that the claim is True.

Learn more about Hydrogen Bonding here:

brainly.com/question/10904296?referrer=searchResults

3 0
3 years ago
9) How long would it take 100 molecules of valinomycin to transport enough K+ to change the concentration inside an erythrocyteo
Alenkinab [10]

Answer: Time required for 100 molecules of valinomycin to transport enough K^{+} to change the concentration inside an erythrocyte is 10 minutes.

Explanation:

The given data is as follows.

 Ions to be transported = (10 mM) \times (100 \mu^{3})(N)

            = 0.010 mol \times 10^{-13} L \times 6.02 \times 10^{23} ions/mol

             = 6.02 \times 10^{6} ions

Here, there are 100 ionophores are present and each one of ionophores are required to transport a value of  ions.

Therefore, the time required for 100 molecules of valinomycin to transport enough K^{+} to change the concentration inside an erythrocyte is as follows.

   6.02 \times 10^{6} ions \times \frac{1 sec}{10^{4} ions}

              = 602 sec

or,          = 10 minutes        (as 1 min = 60 sec)

Thus, we can conclude that time required for 100 molecules of valinomycin to transport enough K^{+} to change the concentration inside an erythrocyte is 10 minutes.

3 0
3 years ago
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