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Monica [59]
4 years ago
6

Meteoroids fall into three main classifications. What are they?

Chemistry
1 answer:
Advocard [28]4 years ago
3 0

Answer:

Iron, Stone, Stony-Iron

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Need Answer ASAP. Scientists design drugs alongside which type of engineers? Structural, civil, chemical, aerospace
g100num [7]

Answer:

Chemical I would assume.

Explanation:

This is because drugs have chemicals in them.

4 0
3 years ago
Read 2 more answers
Which chemical equation represents a precipitation reaction? A. Mg(ClO3)2(aq) + 2HCl(aq) → MgCl2(aq) + 2HClO3(aq) B. AlBr3(aq) +
Rama09 [41]

Answer is D.

Among the given options, the products of equation A, B and C are aqueous solutions. Those are indicated by using (aq).

The balanced equation for the reaction between Li₂CO₃(aq) and FeCl₂(aq) is Li₂CO₃(aq) + FeCl₂(aq) → 2LiCl(aq) + FeCO₃(s)

LiCl is a salt while FeCO₃ is a Grey/green color precipitate. Hence, option D represents a precipitation reaction.

5 0
4 years ago
Phosphoric acid (h3po4) is tribasic, with pka's of 2.14, 6.86, and 12.4. The charge of the ionic form that predominates at ph 3.
Annette [7]

Correct answer is H_2PO_4^-.

Phosphoric acid is a polyprotic acid having 3 acidic hyrdogen therefore it will have 3 pka values.

The equations for the release of acidic hydrogen can be written as:

\\H_3PO_4\rightleftharpoons H_2PO_4^-+H^+\text{ pka=2.14}\\H_2PO_4^-\rightleftharpoons HPO_4^2^-+H^+\text{ pka=6.86}\\HPO_4^2^-\rightleftharpoons PO_4^3^-+H^+\text{ pka=12.4}

From the pka values we can judge the idea of pH as using Henderson-Hasselbalch Equation, we get the relation between pH and pka.

HA\rightarrow H^-+A^-

Using the following equation, relation of pH and pka is

pH=pka+log\frac{[A^-]}{HA}

Using this equation, we can find that the equation having pka= 2. 14 is closest to the pH=3.2 so the ionic form in this equation will be dominant at the same pH.

Therefore at pH=3.2 the ionic form H_2PO_4^- of H_3PO_4 is dominant.


7 0
3 years ago
Read 2 more answers
A 4.80g piece of magnesium (Mg) displaces 2.76mL of water when it is placed in a graduated cylinder. What is the density of magn
AnnZ [28]

Answer:

<h2>1.74 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question we have

density =  \frac{4.80}{2.76}  \\  = 1.73913...

We have the final answer as

<h3>1.74 g/mL</h3>

Hope this helps you

8 0
3 years ago
Which is not one of the parts of the cell theory.
alekssr [168]

Answer:

Pretty sure the answer is d) cells come from nonliving objects

Explanation:

i just think i remember xd

7 0
3 years ago
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