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ohaa [14]
3 years ago
14

Helppp meee Please

Chemistry
1 answer:
Fynjy0 [20]3 years ago
5 0

Answer:

what do you need help with?

Explanation:

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A solution of ph 5 has _____ times more hydrogen ions than that of pure water.
Alik [6]
PH measures the concentration of hydrogen ions on the log 10 scale. Thus, a pH 5 solution has 2 order of magnitude difference from that of pure water, which has a pH of 7.

Therefore, 10^{2} = 100. A solution of pH 5 has 100 times more hydrogen ions that that of pure water.
3 0
3 years ago
The following reaction occurs in a car’s catalytic converter.
blagie [28]

Answer:The correct answer is ;

The oxidation state of nitrogen in NO changes from +2 to 0, and the oxidation state of carbon in CO changes from +2 to +4 as the reaction proceeds.

Explanation:

2NO(g)+2CO(g)\rightarrow N_2(g)+2CO_2(g)

In an oxidation recation addition of oxygen atom takes place or loss of electrons takes place.

In an reduction reaction removal of oxygen atom takes place or gain of electrons takes place.

In the given reaction , the nitrogen atom is present in +2 oxidation state in NO molecule and present in 0 oxidation state in N_2 molecule. Hence, nitrogen is getting reduced that is reduction reaction. NO is oxidizing agent

In the given reaction , the carbon atom is present in +2 oxidation state in CO molecule and present in +4 oxidation state in CO_2 molecule. Hence ,carbon is getting oxidized that is oxidation reaction. CO is a reducing agent.

8 0
3 years ago
Read 2 more answers
the chemical formula of potassium dichromate is K2Cr2O7.state the ratio of potassium, chromium and oxygen atom in the compounds
Len [333]

Answer:

Potassium Dichromate is an orange to red colored, crystalline, inorganic compound that emits toxic chromium fumes upon heating. Potassium dichromate is highly corrosive and is a strong oxidizing agent. This substance is used in wood preservatives, in the manufacture of pigments and in photomechanical processes, but is mainly replaced by sodium dichromate. Potassium dichromate primarily affects the respiratory tract causing ulcerations, shortness of breath, bronchitis, pneumonia and asthma but can also affect the gastrointestinal tract, liver, kidneys and immune system. This substance is a known human carcinogen and is associated with an increased risk of developing lung cancer and cancer of the sinonasal cavity. (NCI05)

3 0
3 years ago
What is the primary difference between a molecule and a compound?
Korvikt [17]
The Answer is A

Hope this helped ;)
5 0
3 years ago
Read 2 more answers
A sample of zinc is heated to a temperature of 77.4ºC, then placed in a calorimeter containing 65.0 g of water. Temperature of w
ycow [4]

180.189 g was the mass of the zinc sample with a specific heat of zinc is 0.390 j/g°C.

<h3>What is specific heat capacity?</h3>

The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).

Using specific heat capacity formula here:

C_{Zn} × m_{Zn}×  ΔT_{Zn} = C_{H_2O}× m_{H_2O} ×  ΔT_{H_2O}

0.390J/g°C × m_{Zn} ×77.4ºC = 4.184J/g°C×  65.0g ×  20.00ºC.

m_{Zn} = 180.189 g

Hence, 180.189 g was the mass of the zinc sample.

Learn more about the specific heat capacity here:

brainly.com/question/19339241

#SPJ1

5 0
2 years ago
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