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3 years ago

As a human being, we are considered to be a ..... because we rely on other organism for food

Chemistry

2 answers:

AleksandrR [38]3 years ago

7 0

Answer:

As a human being, we are considered to be a <u>heterotroph</u> because we rely on other organisms for food.

ryzh [129]3 years ago

3 0

Heterotrophs i think :)

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In a science experiment, Javi concludes that a chemical reaction has occurred. What evidence would support this conclusion?

Naily [24]

Answer:

B) a substance's color and odor changed Explanation: A signal that a chemical change has occurred is when its odor (its smell) or its appearance has changed.

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2 years ago

Read 2 more answers

The density of copper is 8.9 g/mL. What is the volume of 20.5 g copper?

love history [14]

Answer:

density = 8.9 g/ml

m = 20.5 g

V = ... ?

density = m/V

V = m / density

= 20.5 / 8.9

= 2.30337 ml

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3 years ago

Students find the pH of Substance A to be 2.1 and Substance B to be 4.4. They are told Substance C is less acidic than Substance

Slav-nsk [51]

Answer:

the range should be 2.2 to 4.3

Explanation:

I think so because the numbers at the left side of the scale from 1 are more acidic so as it increases it's still acidic but lesser so 1 is more acidic than 2 so I used 2.2 as the beginning of the range because it's less acidic than A even though its a greater number and 4.3 is lesser than 4.4 but its still greater on the scale. frankly speaking I don't feel so correct because it's in decimal so try and compare facts thank you

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3 years ago

Please help me with this. i also need to know what the word heat means.

aliina [53]

Heat is like the fire it’s hot.
I think it’s B
Sorry if I’m wrong

3 0

3 years ago

1. Find the number of protons, neutrons, electrons and electronic structure of flourine 919F.

77julia77 [94]

1. ₉¹⁹F

2. Mg(OH)₂

3. 2H₂ + O₂ ⇒ 2H₂O

<h3>Further explanation</h3>

1. Fluorine, atomic number : 9 , mass number = 19

Symbol : ₉¹⁹F

protons=electrons=atomic number = 9

neutrons = mass number - atomic mass

$\tt n=19-9=10$

Configuration : [He] 2s² 2p⁵

2. Magnesium hydroxide is an ionic compound and is a strong base consisting of 2 ions:

Positive ion: Magnesium: Mg²⁺

negative ion: Hydroxide: OH⁻

The charges of the two are crossed, so that the compound becomes:

Mg(OH)₂

3. Reaction :

H₂ + O₂ --------> H₂O

give coefficient :

aH₂ + bO₂ --------> H₂O

H, left = 2a, right 2⇒2a=2⇒a=1

O, left = 2b, right 1⇒2b=1⇒b=0.5

Reaction becomes :

H₂ + 0.5O₂ --------> H₂O x 2

2H₂ + O₂ --------> 2H₂O

4 0

3 years ago

As a human being, we are considered to be a ..... because we rely on other organism for food​

As a human being, we are considered to be a ..... because we rely on other organism for food