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Lana71 [14]
3 years ago
14

There are 25 elements found in living things. How many of these elements are found in some organisms but not all? o 1 O 6 019 o

25
HELP ME PLZZZ​
Chemistry
2 answers:
Andre45 [30]3 years ago
6 0

Answer:

I say 5or6? I'm not to sure

Explanation:

i hope it helped don't just take my answer tho bc I'm not 100% sure

Svetradugi [14.3K]3 years ago
5 0

Answer:

6 i think

Explanation:

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Physical science!!! please help
IgorLugansk [536]

Answer:

The correct answer is : No, because there are 4 hydrogen atoms on the reactants side and 2 on the products side.

Explanation:

NH_4NO_3\rightarrow N_2O+H_2O

The given reaction equation is not balanced because:

  • Number of hydrogen atoms  on both sides are not equal that is 4 on reactants side and 2 on products side.
  • Number of oxygen atoms on both sides are not equal that is 3 on reactants side and 2 on products side.

In a balanced chemical equation number of atoms of each elements are equal on both sides.

So, the balanced chemical equation will be:

NH_4NO_3\rightarrow N_2O+2H_2O

7 0
3 years ago
A rectangular solid has a length of 3 cm a height of 4 cm and a width of 5 cm what is the solid volume ?
andrew11 [14]
Volume is 60 and the area is 94 have a great day
3 0
3 years ago
What are the chemical formulas for..
andrezito [222]
S4O5
S3O
SeF6
N4S5
CCl9

All numbers should be subscripts
6 0
3 years ago
A sample of gas is held at constant pressure. Increasing the Kelvin temperature of this gas sample causes the average kinetic en
Maksim231197 [3]
Increase.
I don't even know the point of the first sentence. Average Kinetic Energy *is* temperature. The higher AVE the higher the temp. The higher the temp the faster the AVE. They're directly correlated.
5 0
3 years ago
How do I calculate the standard enthalpy change for the following reaction at 25 °C ?
ladessa [460]
MgCl2(s) + H2O(l) → MgO(s) + 2 HCl(g) 

Using the standard enthalpies of formation given in the source below: 

(−601.24 kJ) + (2 x −92.30 kJ) − (−641.8 kJ) − (−285.8 kJ) = +141.76 kJ 
So: 

MgCl2(s) + H2O(l) → MgO(s) + 2 HCl(g), ΔH = +141.76 kJ
4 0
4 years ago
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