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grandymaker [24]
2 years ago
14

That my last Q8 A , can someone help me with

Chemistry
2 answers:
scoray [572]2 years ago
4 0
The first was louder, while the second had a higher pitch
DENIUS [597]2 years ago
3 0
The first whistle is louder while the second whistle has a higher pitch
Loud vs high
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A nucleus emits an alpha particle. What happens to the mass
babunello [35]

Answer:

the mass number decreases by 4 and the atomic number decreases by 2

4 0
2 years ago
A stock solution of ammonia in water is 28 wt% NH3. The Formal Weight (FW) of NH3 is 17.03 g/mol). The solution density at room
weqwewe [10]

Answer:

[NH₃] = 14.7 mol/L

Explanation:

28 wt% is a type of concentration that indicates that 28 g of ammonia is contained in 100 g of solution.

Let's determine the amount of ammonia:

28 g . 1 mol / 17.03g = 1.64 moles of NH₃

You need to consider that, when you have density's data it is always referred to solution:

Mass of solution is 100 g, let's find out the volume

0.90 g/mL = 100 g /V

V = 100 g / 0.90mL/g → 111.1 mL

We convert the volume to L → 111.1 mL . 1 L/1000mL = 0.1111 L

mol/L = 1.64 mol/0.1111L → 14.7 M

mol/L = M → molarity a sort of concentration that indicates the moles of solute in 1L of solution

4 0
2 years ago
Both of the sulfur-oxygen double bonds in so2 is polar. in which direction should the polarity arrows point
kodGreya [7K]

Answer:

Away from the central sulfur atom.

Explanation:

4 0
3 years ago
Read 2 more answers
Silver chloride breaks down to form silver and chlorine in the presence of light. what type of reaction is this? A combination r
Veronika [31]
A decomposition reaction<span> is a type of chemical </span>reaction<span> in which a single compound breaks down into two or more elements or new compounds. These </span>reactions<span> often involve an energy source such as heat, light, or electricity that breaks apart the bonds of compounds. so it is a decomposition reaction because the silver chloride breaks down into silver and chlorine</span>
3 0
3 years ago
Read 2 more answers
In Millikan’s experiment, the oil droplets acquire one or more negative charges by combining with the negative charges that are
zimovet [89]

Answer:

-6.4x10⁻¹⁹ C

Explanation:

The elementary charge of one electron is -1.60x10⁻¹⁹C, so each electron has its charge, and a sample with more than one electrons will have a multiple of its charge, which is proportional to the number of electrons. So, if the oil droplet had 4 electrons, thus the charge will be four times the elementary charge:

4*(-1.60x10⁻¹⁹) C = -6.4x10⁻¹⁹ C

4 0
3 years ago
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