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Andru [333]
3 years ago
7

A scientific theory is _____.What have chemists done to help people conserve energy?

Chemistry
1 answer:
Lena [83]3 years ago
5 0

Answer:

the have done so many things to help

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Is Sucrose a ionic or covalent bond
yKpoI14uk [10]

Answer:

covalent bond

Explanation:

hope this helps :D

4 0
3 years ago
A sample of a compound is determined to have 1.17 g of carbon and 0.287 g of hydrogen. what is the correct representation of the
yarga [219]

CH3 is the empirical formula for the compound.

A sample of a compound is determined to have 1.17g of Carbon and 0.287 g of hydrogen.

The number of atom or moles in the compound is

1.17 g C X  1 mol of C / 12.011 g C = 0.097411 mol of C.

0.287 g H x 1 mol of  H / 1 g H = 0.28474 mol H.

This compound contains 0.097411 mol of carbon and 0.28474 mol of Hydrogen.

So we can represent the compound with the formula C0.974H0.284.

Subscripts in formulas can be made into whole numbers by multiplying the smaller subscript by the larger subscript.

we can divide 0.284 by 0.0974.

0.284 / 0.0974 = 3.

So here, Carbon is one and hydrogen is 3.

We can write the above formula as a CH3.

Hence the empirical formula for the sample compound is CH3.

For a detailed study of the empirical formula refer given link brainly.com/question/13058832.

#SPJ1.

5 0
2 years ago
How many moles of co2 are produced when 5.70 mol of ethane are burned in an excess of oxygen
sweet-ann [11.9K]
I believe the answer is 6
4 0
3 years ago
G= 10N/Kg
densk [106]

Answer: In classical physics terms, you do work on an object when you exert a force on ... One Newton is the force required to accelerate one kilogram of mass at 1 meter per second per second. ... The Newton-meters are termed joules (J). ... of the working object is transferred to that object raising its energy state.

Explanation:

7 0
3 years ago
The gas phase reaction, A2 + B2 ---->2AB, proceeds by bimolecular collisions between A2 and B2 c,o(\'e'9 molecules. The rate
Varvara68 [4.7K]

Answer:

The reaction rate becomes quadruple.

Explanation:

According to the law of mass action:-

The rate of the reaction is directly proportional to the active concentration of the reactant which each are raised to the experimentally determined coefficients which are known as orders. The rate is determined by the slowest step in the reaction mechanics.

Order of in the mass action law is the coefficient which is raised to the active concentration of the reactants. It is experimentally determined and can be zero, positive negative or fractional.

The order of the whole reaction is the sum of the order of each reactant which is raised to its power in the rate law.  

Thus,  

Given that:- The rate law is:-

r=k[A_2][B_2]

Now, [A'_2]=2[A_2] and [B'_2]=2[B_2]

So, r'=k[A'_2][B'_2]=k\times 2[A_2]\times 2[B_2]=4\times k[A_2][B_2]=4r

<u>The reaction rate becomes quadruple.</u>

5 0
3 years ago
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