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Ostrovityanka [42]
3 years ago
11

A scientist observes how a particular South American bird cares for its young. Why is a field study an appropriate type of scien

tific investigation? A. It allows the scientist to simulate the natural environment of the bird in the laboratory. B. It allows the scientist to conduct a controlled experiment. C. It allows the scientist to watch the animals without disturbing them or their environment. D. It allows the scientist to change how the bird cares for its young.WHOEVER ANSWERS FIRST GETS BRAINLIEST ANSWER
Chemistry
1 answer:
mixer [17]3 years ago
7 0
The best answer would be A. Hope i helped
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Which of these substances i) jello ii) the liquid called tea iii) distilled water is a mixture?
11111nata11111 [884]

The answer is ii) the liquid called tea.

That is ii) the liquid called tea is a mixture.  

the liquid called tea is a homogeneous mixture that contains organic and inorganic compounds,  sugar(organic carbohydrate),tea leaf extract(organic), water(inorganic).

Whereas (iii) distilled water, is a pure substance while (I) gello is a colloid.

7 0
3 years ago
can the list below. Which did you include in your answer? Foam is a colloid. Colloids include gas dispersed in a liquid. Colloid
VikaD [51]

Answer:

Its all of them

Explanation:

4 0
3 years ago
Read 2 more answers
The chemical equation below shows the reaction between tin (Sn) and hydrogen fluoride (HF). Sn + 2HF mc017-1.jpg SnF2 + H2 The m
Sergio [31]
Tin and Hydrofluoric Acid reacts as shown,

<span>                              Sn  +  2 HF    </span>→    SnF₂<span>  +  H</span>₂

According to Equation,

40.02 g (2 Moles) HF Required  =  <span>1 Mole of Sn for complete Reaction

So,
              40 g of HF will require  =  X Moles of Sn

Solving for X,
                                       X  =  (40 g </span>× 1 Mole) ÷ 40.02 g

                                       X  =  0.999 Moles  ≈  1 Mole
Result:
            40 g 
of HF requires 1 Mole of Tin (Sn) for complete Reaction to produce SnF₂ and H₂.
7 0
3 years ago
Read 2 more answers
1. What way do Convergent plates move?
amid [387]

Answer:

Convergent plates move towards each other.

Explanation:

7 0
3 years ago
Which energy profile best shows that the enthalpy of formation of CS2 is 89.4 KJ/mol?
Anna11 [10]

Answer:

Option C. Energy Profile D

Explanation:

Data obtained from the question include:

Enthalpy change ΔH = 89.4 KJ/mol.

Enthalpy change (ΔH) is simply defined as the difference between the heat of product (Hp) and the heat of reactant (Hr). Mathematically, it is expressed as:

Enthalpy change (ΔH) = Heat of product (Hp) – Heat of reactant (Hr)

ΔH = Hp – Hr

Note: If the enthalpy change (ΔH) is positive, it means that the product has a higher heat content than the reactant.

If the enthalpy change (ΔH) is negative, it means that the reactant has a higher heat content than the product.

Now, considering the question given, the enthalpy change (ΔH) is 89.4 KJ/mol and it is a positive number indicating that the heat content of the product is higher than the heat content of the reactant.

Therefore, Energy Profile D satisfy the enthalpy change (ΔH) for the formation of CS2 as it indicates that the heat content of product is higher than the heat content of the reactant.

7 0
3 years ago
Read 2 more answers
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