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Elenna [48]
3 years ago
14

Systematic error is defined as:_______.

Chemistry
1 answer:
Andru [333]3 years ago
5 0

Answer:

The correct answer is option d.

Explanation:

It is defined as repeatable and consistent error associated with a faulty equipment. It a fixed amount of deviation of a measurement from the actual measurement.

These error usually caused by incorrectly calibrated instruments or by an incorrect use of the instruments.

For example: observational error , interference of environment etc.

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Please Help, I am so busy and I really don't have time for this. 
DochEvi [55]

I belive it would be A(chemical)

7 0
3 years ago
The table below shows the commonly eaten foods of some organisms.
Aleks [24]
Primary consumers eat plants, which are producers. Producers are essentially he beginning of the food chain. Secondary consumers eat primary consumers. This means that organisms who are both primary and secondary consumers are omnivores. In this case, Organism A is a carnivore, Organism B is an omnivore, Organism C is an omnivore, and Organism D is an omnivore. The difference between Organisms C and D is that Organisms C eat insects, which are primary consumers, whereas Organism D eats fish, which are secondary consumers.

Answer: C and D

Hope this helps!
8 0
3 years ago
What is the name of the compound Si5F7?
svetoff [14.1K]
I think it’s D, silicon Fluoride.
3 0
3 years ago
Chlorine gas can be prepared in the laboratory by the reaction of hydrochloric acid with manganese(IV) oxide.
lana66690 [7]

Answer:

a. HCl

b. 24.3 g of Cl₂

c. 19.4 g of Cl₂

Explanation:

a. In order to determine the limiting reactant we convert the mass of each reactant to moles.

The reaction is: 4HCl (aq) + MnO₂(s) → MnCl₂(aq) + 2H₂O (l) + Cl₂(g)

37.3 g / 86.94g/mol = 0.429 moles of manganese dioxide

50.1 g / 36.45 g/mol = 1.37 moles of HCl

Ratio is 1:4. 1 mol of MnO₂ needs 4 moles of hydrochloric to react

Then, 0.429 moles of dioxide will react with (0.429 . 4) /1 = 1.71 moles of HCl.

At least, we have 1.37 moles, so the HCl is the limiting reactant.

b. In this question, we can work with stoichiometry with a rule of three:

4 moles of HCl produce 1 mol of chlorine

Then, 1.37 moles of HCl will produce (1.37 . 1) /4 = 0.3425 moles of Cl₂

We convert the moles to mass → 24.3 g of Cl₂

c. In order to determine the actual yield of chlorine, we multiply

Theoretical yield . Yield percent/100 → 24.3 g . 79.9/100 = 19.4 g

3 0
3 years ago
What is a simple definition of crude oil?
Margarita [4]

Answer:

Crude oil means a mixture of hydrocarbons that exists in liquid phase in natural underground reservoirs and remains liquid at atmospheric pressure after passing through surface separating facilities.

3 0
3 years ago
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