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ozzi
3 years ago
14

Which of the following statements is true

Chemistry
1 answer:
Morgarella [4.7K]3 years ago
6 0
A. you're exposed to nuclear radiation everyday
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The analysis of 2.12 of a compound gave 0.33 of carbon, 1.82 of the same compound gave 1.53 of sulphur. Calculate the emperical
luda_lava [24]

Answer:

CS₂

Explanation:

To find the empirical formula we need to determine first the percentage of each atom in the molecule. Then, we need to find the moles and, as empirical formula is the simplest whole-number ratio of atoms we can solve the empirical formula:

<em>%C:</em>

0.33gC / 2.12g * 100 = 15.6%

<em>%S:</em>

1.53g S / 1.82g * 100 = 84.1%

In a basis of 100, the moles of each atom are:

<em>C:</em>

15.6g C * (1mol / 12.01g) = 1.30 moles

<em>S:</em>

84.1g S * (1mol / 32.065g) = 2.62 moles

The ratio of Sulphur-Carbon is:

2.62mol / 1.30mol = 2

That means empirical formula is:

<h3>CS₂</h3>
6 0
3 years ago
When a substance is heated, what causes its properties to change?
hoa [83]

The molecules vibrate when the substance is heated, and the shape of the substance begins to form a different shape. For example: when you hear up metal it will melt becuase its molecules are changing and moving.

8 0
3 years ago
Read 2 more answers
Ca(C2H302)2<br> Name the following compounds.
lesya [120]

Answer:

nut

Explanation:

7 0
3 years ago
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A proton in a linear accelerator has a de Broglie wavelength of 132 pm. What is the speed of the wavelength?
kherson [118]

Answer:

The speed of wavelength is 3.0 ×10³ m/s.

Explanation:

Given data:

De Broglie wavelength = 132 pm (132×10⁻¹² m)

Speed of wavelength = ?

Solution:

Formula:

λ = h/mv

λ = wavelength

h = planck's constant

m = mass of proton

v = speed

now we will put the values in formula.

132×10⁻¹² m = 6.63 ×10⁻³⁴ j.s / 1.67 ×10⁻²⁷ kg × v

v =  6.63 ×10⁻³⁴ j.s / 1.67 ×10⁻²⁷ kg × 132×10⁻¹² m

j = kg m²/s²

v = 6.63 ×10⁻³⁴ kg m²/s / 1.67 ×10⁻²⁷ kg × 132×10⁻¹² m

v = 6.63 ×10⁻³⁴ kg m²/s / 220.44 ×10⁻³⁹ kg.m

v = 0.03×10⁵ m/s

v = 3.0 ×10³ m/s

The speed of wavelength is 3.0 ×10³ m/s.

3 0
3 years ago
When salt dissolves completely into water, which term is used to describe the water?
mamaluj [8]

Answer: as salt dissolves in the water

Explanation: water is termed as the solvent

but the water and salt is termed as the solution

As salt is the solute

HOPE THIS HELPS!!!!!!!!!!!!!!!!!!!:)

4 0
2 years ago
Read 2 more answers
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