All categories

3 years ago

PLSSS HELP MEEEEEEEE

Chemistry

1 answer:

Citrus2011 [14]3 years ago

5 0

Answer:

Explanation:

frequency is the product of time and wave length

You might be interested in

What is the atomic radius <br> of mercury?

cricket20 [7]

The answer is 155 pm, hope this helps!

4 0

3 years ago

Calculate the specific heat capacity of the unknown metal given the

Vedmedyk [2.9K]

Answer: The specific heat capacity of the unknown metal given is $0.466 J/g^{o}C$ .

Explanation:

Given: Mass = 225 g

Change in temperature = $13^{o}C$

Heat energy = 1363 J

The formula used to calculate specific heat is as follows.

$q = m \times C \times \Delta T$

where,

q = heat energy

m = mass of substance

C = specific heat

$\Delta T$ = change in temperature

Substitute the values into above formula as follows.

$q = m \times C \times \Delta T\\1363 J = 225 g \times C \times 13^{o}C\\C = \frac{1363 J}{225 g \times 13^{o}C}\\= 0.466 J/g^{o}C$

Thus, we can conclude that the specific heat capacity of the unknown metal given is $0.466 J/g^{o}C$ .

3 0

3 years ago

Which statement describes J.J. Thomson’s plum-pudding model of the atom?

ra1l [238]

Option C: the electrons are embedded in a positive sphere.

As we know that was a wrong model and nowadays the electrons are considered to be around the nucleus, in regions called orbitals.

4 0

4 years ago

Which chemical reaction needs more energy to break bonds in the reactants

MA_775_DIABLO [31]

Answer:An endothermic reaction

Explanation: In an endothermic reaction, it takes more energy to break the bonds of the reactants than is released when the bonds in the products are formed. In an endothermic reaction, the temperature goes down.

6 0

3 years ago

Read 2 more answers

Why do noble gases have the least amount of electronegativity?

sattari [20]

<span>Their orbitals are completely filled</span>

4 0

3 years ago