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notka56 [123]
3 years ago
15

Zinc metal and lead II nitrate yields zinc nitrate and lead metal

Chemistry
1 answer:
NNADVOKAT [17]3 years ago
3 0

Answer:

i odnt knwonwta whyour sayong

Explanation:

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Some elements are liquids or gases.<br><br><br> True <br> False
gregori [183]
The answer to this ? is true
4 0
3 years ago
What is the main purpose of the curiosity rover ?
alina1380 [7]

Answer:

What is the main purpose of the curiosity rover ?

Explanation:

Curiosity's mission is to determine whether the Red Planet ever was, or is, habitable to microbial life. The rover, which is about the size of a MINI Cooper, is equipped with 17 cameras and a robotic arm containing a suite of specialized laboratory-like tools and instruments.

6 0
3 years ago
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Tooth enamel is ca5(po4)3(oh). calculate the percent composition of the elements present.
Mama L [17]
We shall find the molar mass first.  
Ca5(PO4)3(OH) = (40 * 5) + 3 (31 + 4(16)) + 16 + 1 = 200 + 285 + 17 = 485 + 17 = 502. 
Percent of Calcium = 200/ 502 * 100 = 39.8%
 Percent of Phosphorus = 91/502 * 100 = 18.1%
 Percent of Hydrogen = 1/502 * 100 = 0.19%
 Percent of Oxygen = 100 - (39.8 + 18.1 + 0.19) = 41.91%

8 0
3 years ago
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A key process common to all organisms is the ability to reproduce. Where do all cells come from?
satela [25.4K]

Answer:

It’s d

Explanation:

It’s d 100%

5 0
3 years ago
If hydrochloric acid is obtained commercially at a concentration of 12.1M, how many milliliters of 12.1M HCl(aq) must be used to
rewona [7]

Answer:

V_1=82.6mL

Explanation:

Hello there!

In this case, according to this question, we will need to deal with this dilution problem, because it is asking for the volume of a 12.1-M stock solution of HCl. In such a way, we can use the following equation, under the assumption of no change in the number of moles in the solution:

M_2V_2=M_1V_1

Thus, we solve for the initial volume, V1, as shown below:

V_1=\frac{M_2V_2}{M_1}

And plug in the initial concentration and final concentration and volume to obtain:

V_1=\frac{2000mL*0.500M}{12.1M}\\\\V_1=82.6mL

Regards!

7 0
3 years ago
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