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ipn [44]
3 years ago
7

A 2 m3 wooden block has a mass of 10 kg. What is the density of the block?

Chemistry
1 answer:
Alex73 [517]3 years ago
6 0

Answer:

5

Explanation:

density is equal to mass over volume

p=m/v

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A student studies photosynthesis and cellular respiration in plants. Which of the following reactions would produce 12 grams (g)
spayn [35]

Answer:

The answer is A

Explanation:

Because I used the elimination rule none of the other ones could be an answer.

6 0
3 years ago
Which of the following is not an example of a chemical change? (hint:
Lena [83]

Answer:

C. Boiling water

Explanation:

Boiling water is a physical change only; the H20 molecules are moving from a liquid state to a gas state and not turning into a new substance.

3 0
3 years ago
True or false: Sometimes older rocks end up on top of younger rocks.
olchik [2.2K]

Answer:

true

downstream to the riverbed. However, the most common mechanism to produce older rocks on top of younger is by thrust faulting. Thrust faults form where rocks are being compressed, usually by plate tectonic mechanisms. Thrust faults rip up older strata and pile it on top of younger rocks.

Explanation:

5 0
3 years ago
Read 2 more answers
H2PO4-(aq) ⇆ H+(aq) + HPO42-( which ion plays the role of hydrogen ion donor and which one plays the hydrogen ion acceptor in BP
alexgriva [62]

Answer:

<u>H2PO4- is a proton donor and HPO42_ is a proton acceptor</u>

Explanation:

Step 1: What are hydrogen ion donor and acceptor

in the following reaction we see that:

⇒ H2PO4- is more likely to give a H+ ion to form HPO42-.  

⇒HPO42- is more likely to take a H+ ion, to form H2PO4-

The reaction of an acid in water solvent is described as a dissociation :

HA ⇔ H+ + A-

⇒where HA is a proton acid

So, H2PO4- = HA   and  HPO42- = A-

Acids are proton donors. So, <u>H2PO4- is a proton donor and HPO42_ is a proton acceptor</u>

6 0
3 years ago
What is a characteristic of a lewis base?
statuscvo [17]
A Lewis base is characterized as any species that can donate a lone pair of electrons the Lewis acid (which has a vacant orbital for the lone pair to bond with)

8 0
3 years ago
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