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Olegator [25]
4 years ago
6

Atom X contains seven protons and seven neutrons. Atom Z contains seven protons and eight neutrons. Which of the following state

ments correctly describes the two atoms? A. They are isotopes. B. They are radioactive. C. They are atoms of different elements. D. They have the same mass number.
Chemistry
1 answer:
Shtirlitz [24]4 years ago
3 0

Answer:

it is A. They ate isotopes

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if you want to see how the water molecules are split inside the thylakoid space, how many membranes would you have to cross to g
Feliz [49]

Answer:

4 biological membranes.

Explanation:

So in total, your water molecule has to go through your cell membrane, reach the outer membrane of your chloroplast and then through the inner membrane, and then lastly, it has to go through your thylakoid membrane to reach its final destination of the illumine. So in total 4 biological membranes.

3 0
1 year ago
Please help with word equations?
Delvig [45]
For the answer to the questions above, 

a) Ag2CO3(s) => Ag2O(s)+CO2(g) 

<span>b) Cl2(g)+2(KI)(aq) => I2(s)+2(KCl)(aq) (coefficients are for balanced equation) </span>
<span>net ionic is Cl2(g)+2I- => I2(s)+2Cl-(aq) </span>

<span>c) I2(s)+3(Cl2)(g)=>2(ICl3)
</span>I hope I helped you with your problem
7 0
4 years ago
Why is Cl weaker base
Helen [10]
Because cl atoms are bonded with hydrogen. hydrogen bond is very strong bond
6 0
3 years ago
Using a spectrophotometer, and a cuvette with a path length of 1 cm you measure the absorbance (A275) of Guanosine to be 0.70. C
Anton [14]

Answer : The concentration of guanosine in your sample is, 8.33\times 10^{-5}M

Explanation :

Using Beer-Lambert's law :

A=\epsilon \times C\times l

where,

A = absorbance of solution  = 0.70

C = concentration of solution = ?

l = path length = 1.00 cm

\epsilon = molar absorptivity coefficient guanosine  = 8400M^{-1}cm^{-1}

Now put all the given values in the above formula, we get:

0.70=8400M^{-1}cm^{-1}\times C\times 1.00cm

C=8.33\times 10^{-5}M

Thus, the concentration of guanosine in your sample is, 8.33\times 10^{-5}M

5 0
3 years ago
Solids and liquids have both mass and volume, but a gas has only mass.<br> a. True<br> b. False
tino4ka555 [31]
True. A gas does not have a definite volume. Therefore, making this statement correct. <span />
6 0
3 years ago
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