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xeze [42]
3 years ago
11

What is wrong with the following statement? Hal says that his teacher is solely responsible for preventing laboratory accident.

Chemistry
1 answer:
exis [7]3 years ago
3 0

Answer:

Hal is wrong because the teacher can instruct the student, but no make all the choices in a lab.Students must always wear ppe (personal protection equipment) , use proper lab protocol, and conduct themselves in a responsible manner. It is NOT the work of a teacher to ensure lab safety, but in fact the responsibility of said students.

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A(n) ____ is a well blended mixture that appears to be a single substance
Savatey [412]

Answer:

Solution

Explanation:

Compound - a chemical substance made by elements of different densities to form a chemical union.

Element - Any one of the simple chemical substances that can't decompose in a chemical reaction

8 0
3 years ago
What is the specific heat of a substance that absorbs 2500 joules of heat when a sample of 100g of the substance increases in te
Ierofanga [76]

Answer:

0.417 J/gºC

Explanation:

From the question given above, the following data were obtained:

Heat (Q) absorbed = 2500 J

Mass (M) of substance = 100 g

Initial temperature (T1) = 10 °C

Final temperature (T2) = 70 °C

Specific heat capacity (C) =?

Next, we shall determine the change in temperature (ΔT). This can be obtained as follow:

Initial temperature (T1) = 10 °C

Final temperature (T2) = 70 °C

Change in temperature (ΔT) =?

Change in temperature (ΔT) = T2 – T1

Change in temperature (ΔT) = 70 – 10

Change in temperature (ΔT) = 60 °C

Finally, we shall determine the specific heat capacity of the substance as follow:

Heat (Q) absorbed = 2500 J

Mass (M) of substance = 100 g

Change in temperature (ΔT) = 60 °C

Specific heat capacity (C) =?

Q = MCΔT

2500 = 100 × C × 60

2500 = 6000 × C

Divide both side by 6000

C = 2500 / 6000

C = 0.417 J/gºC

Therefore, the specific heat capacity of substance is 0.417 J/gºC

5 0
3 years ago
Balance the equation The synthesis of carborundum for sandpaper. _____ SiO2 + _____ C → _____ SiC + _____ CO
UkoKoshka [18]

Answer:

balanced chemical equation is

2 SiO₂ + 3 C₂ = 2 SiC + 4 CO

3 0
3 years ago
2. Where can the oldest be found in this section of the ocean floor? Drag and drop an arrow to indicate this location
ira [324]

Answer:

The ocean

Explanation:

bc its 99% explored:))

8 0
3 years ago
Read 2 more answers
When a hydrocarbon fuel is burned, almost all of the carbon in the fuel burns completely to form CO2 (carbon dioxide), which is
Monica [59]

Answer:

1.239 * 10^8 Kg

Explanation:

Since all the electricity consumed comes from natural gas;

amount of electricity consumed = 700 * 300,000 = 2.1 * 10^8 kWh

So, amount of CO2 consumed is given by;

amount of electricity consumed * amount of CO2 per kWh

Hence,

Amount of CO2 = 2.1 * 10^8 kWh * 0.59 = 1.239 * 10^8 Kg

8 0
3 years ago
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