All categories

3 years ago

Why do we balance chemichal reactions

Chemistry

2 answers:

Delvig [45]3 years ago

6 0

Answer:

We balance chemical equations due to the law of conservation of mass, which states that mass can neither be created or destroyed. Therefore, in a chemical reaction, the total mass of the reactants must be equal to the total mass of the products. Balancing equations accounts for the total mass of the reactants and the total mass of the products.

Explanation:

weeeeeb [17]3 years ago

3 0

Answer:

to satisfy the law of conservation of matter.

the law of conservation states that matter can not be created nor destroyed.

You might be interested in

This chart show the amount of radioactivity measured from three unknown isotopes. Which statement describes each of the isotopes

Natalija [7]

Answer: Isotope A was measured at day 24, Isotope B was measured at day 6, and Isotope C was measured at day 10.

Explanation:

The half-life time is defined as the time needed for the radioactive isotope to decay to the half of its initial concentration.

Isotope A: its starting weight 95 g and its ending measured weight is 5.9.

95 → 47.5 (half-life 1) → 23.75 (half-life 2) → 11.875 (half-life 3) → 5.9 (half-life 4).

It needs 4 half-lives to decay from 95 to 5.9.

half-life time of isotope A = 6 days.

the time taken to measure isotope A = (4 x 6 days) = 24 days.

Isotope B: its starting weight 20 g and its ending measured weight is 2.5.

20 → 10 (half-life 1) → 5 (half-life 2) → 2.5 (half-life 3).

It needs 3 half-lives to decay from 20 to 2.5.

half-life time of isotope B = 2 days.

the time taken to measure isotope B = (3 x 2 days) = 6 days.

Isotope C: its starting weight 45 g and its ending measured weight is 22.5.

45 → 22.5 (half-life 1)

It needs 1 half-life to decay from 45 to 22.5.

half-life time of isotope C = 10 days.

the time taken to measure isotope C = (1 x 10 days) = 10 days.

4 0

3 years ago

Read 2 more answers

Read the descriptions below of two substances and an experiment on each. Decide whether the result of the experiment tells you t

Phantasy [73]

Answer:

Samples A and B are mixtures

Explanation:

For sample A, we were told that the initial density of the solution is 0.77/gmL. After distillation, the liquid left has a density of 1.04/gmL. Apparently, A is a mixture of liquids.

As for sample B, the spread of the chromatogram resulting in different colours show that the sample B is not pure. It is a mixture of substances. A pure sample will yield only a single spot.

7 0

3 years ago

To use the gas law constant R=0.0821 the unit for temp should be kelvin and the unit for pressure should be atmospheres True or

hoa [83]

It is crucial to match your units of Pressure, Volume, number of mole, and Temperature with the units of R. If you use the first value of R, which is 0.082057 L atm mol-1K-1, your unit for pressure must be atm, for volume must be liter, for temperature must be Kelvin.

7 0

4 years ago

Read 2 more answers

Chrysanthenone is an unsaturated ketone. If Chrysanthenone has M+ = 150 and contains 2 double bond(s) and 2 ring(s); what is its

snow_lady [41]

Answer:

the Molecular formula will be; C10H14O

Explanation:

Given the data in the question;

Chrysanthenone is an unsaturated ketone,

it has M+ = 150 and contains 2 double bond(s) and 2 ring(s).

molecular formula = ?

we know that ketone contain 1 oxygen and mass of oxygen is 16

so mass of the C and H remaining will be;

⇒ 150 - 16 = 134

Now we determine the number of C atoms;

⇒ 134 / 13 = 10

hydrocarbon with 10 hydrogen atom have CnH2n+2 means

⇒ ( 10 × 2 ) +2 = 22 hydrogens

But then we have 3 unsaturation meaning 6 hydrogens less and also we have ring meaning 2 more hydrogens

⇒ 22 - 6 - 2 = 14

Hence the Molecular formula will be; C10H14O

4 0

3 years ago

Solution of the Schrödinger wave equation for the hydrogen atom results in a set of functions (orbitals) that describe the behav

kvv77 [185]

Answer :

'n' specifies → (B) The energy and average distance from the nucleus.

'l' specifies → (C) The subshell orbital shape.

'ml' specifies → (A) The orbital orientation.

Explanation :

Principle Quantum Numbers : It describes the size of the orbital. It is represented by n. n = 1,2,3,4....

Azimuthal Quantum Number : It describes the shape of the orbital. It is represented as 'l'. The value of l ranges from 0 to (n-1). For l = 0,1,2,3... the orbitals are s, p, d, f...

Magnetic Quantum Number : It describes the orientation of the orbitals. It is represented as $m_l$ . The value of this quantum number ranges from $(-l\text{ to }+l)$ . When l = 2, the value of

Spin Quantum number : It describes the direction of electron spin. This is represented as $m_s$ . The value of this is $+\frac{1}{2}$ for upward spin and $-\frac{1}{2}$ for downward spin.

As per question we conclude that,

'n' specifies → The energy and average distance from the nucleus.

'l' specifies → The subshell orbital shape.

'ml' specifies → The orbital orientation.

5 0

3 years ago