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Lerok [7]
3 years ago
9

statement 1,mass is conserved durning the reaction. statement 2 sum of mass and energy is conserved durning the reaction. which

statement is true for both nuclear reaction and chemical reaction
Chemistry
1 answer:
maksim [4K]3 years ago
6 0

Answer:

Explanation:

None of the statement is true for both chemical and nuclear reactions. In chemical reactions, mass is always conserved and the type of atoms are also conserved.

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Can anyone help me with the calculations for the Frequency, Wavelength, Energy Chart?
sergeinik [125]
Use the following equations to fill the chart.

E = hf
where
h = 6.63 x 10⁻³⁴ J/s, Planck's constant
f = frequency Hz
E = quanta of energy, J

c = fλ
where
c = 3 x 10⁸ m/s, the velocity of light
λ = wavelength, m

If energy is given in J/mmol, divide by Avogadro's number, N = 6.02 x 10²³, to convert it to J.

The completed table is shown below.

3 0
3 years ago
Which element is least likely to undergo a chemical reaction?
Trava [24]

Answer:

Helium

Explanation:

Helium is most likely to undergo a chemical reaction because

  • It has a complete electron shell, so it does not need any more electrons
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6 0
3 years ago
Read 2 more answers
Chemicals are classified as health hazards when they pose which of the following hazardous effects?
AlexFokin [52]

Answer:

poisoning, breathing problems, skin rashes, allergic reactions, allergic sensitisation, cancer, and other health problems from exposure.

Explanation:

many hazardous chemicals are also classified as dangerous goods.

4 0
2 years ago
Calculate the number of moles of NaOH contained in 250. mL of a 0.05M solution.
steposvetlana [31]

Answer:

0.0125mol

Explanation:

Molarity (M) = number of moles (n) ÷ volume (V)

n = Molarity × Volume

According to this question, a 0.05M solution contains 250 mL of NaOH. The volume in litres is as follows:

1000mL = 1L

250mL = 250/1000

= 0.250L

n = 0.05 × 0.250

n = 0.0125

The number of moles of NaOH is 0.0125mol.

3 0
2 years ago
Calculate the density of a solid if it has a mass of 8.47 g and a volume of 3.24 cms.
gtnhenbr [62]

Answer:

Density =2.614g/cms

Explanation:

Density = mass/volume

Density= 8.47g/3.24cms

3 0
3 years ago
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