Finish this statement: The colder it is the ______________

Whats a particle of electormagnetic radiation

Tpy6a [65]

Answer:

<em>Scientists have observed that electromagnetic radiation has a dual "personality." Besides acting like waves, it acts like a stream of particles (called "photons") that have no mass. The photons with the highest energy correspond to the shortest wavelengths.</em>

Explanation:

Hope It Help

5 0

3 years ago

Please help, and if you could also give me a step by step that would be awesome!!

const2013 [10]

Answer:

4.4 g

Explanation:

Step 1: Write the balanced equation

Cu + 4 HNO₃ ⇒ Cu(NO₃)₂ + 2 NO₂ + 2 H₂O

Step 2: Calculate the moles corresponding to 3.2 L of NO₂ at STP

At standard temperature and pressure, 1 mole of NO₂ occupies 22.4 L.

3.2 L × 1 mol/22.4 L = 0.14 mol

Step 3: Calculate the moles of Cu needed to produce 0.14 moles of NO₂

The molar ratio of Cu to NO₂ is 1:2. The moles of Cu needed are 1/2 × 0.14 mol = 0.070 mol.

Step 4: Calculate the mass corresponding to 0.070 moles of Cu

The molar mass of Cu is 63.55 g/mol.

0.070 mol × 63.55 g/mol = 4.4 g

5 0

3 years ago

Water is 11% hydrogen and 89% oxygen by mass. How many grams of oxygen are in a 250 g glass of water?

mylen [45]

Answer:

mass O2 = 222.5 g

Explanation:

%wt = ((mass compound)/(mass sln))×100

balance reaction:

2H2 + O2 ↔ 2H2O

∴ %wt H2 = 11 % = ((mass H2)/(mass H2O))×100

∴ %wt O2 = 89 % = ((mass O2)/(mass H2O))×100

∴ mass H2O 250 g

⇒ mass O2 = (0.89)(250 g)

⇒ mass O2 = 222.5 g

3 0

3 years ago

(70 POINTS) PLEASE HELP ME YOU DONT HAVE TO WRITE 4 PARAGRAPHS JUST HRLP ME EXPLAIN A SCIENTIFIC THERORY

Misha Larkins [42]

Answer:

well its def is : an explanation of observations or events based on knowledge gained from many observations and investigations

Explanation:

you will also need to know this if you dont already ✔

scientific law:✨

a law that describes a repeatable pattern in nature

manipulated/independent variable:✨

variable that stands alone an is not affected by other variables (the variable that is purposely changed)

responding/dependent variable:✨

variable that changes as a result of an experiment (variable that is measured)

control variable:✨

variable that always stays the same in an experiment

7 0

3 years ago

When the temperature of a sample of pure water is raised above 25 °C,(1)the hydronium ion concentration will be greater than the

Ludmilka [50]

Answer:

The correct answer is option 3.

Explanation:

$H_2O\rightleftharpoons H^++OH^-$

The expression of $K_w$ is given by :

$K_w=[H^+][OH^-]$

$K_w\propto [H^+]$

$K_w\propto [OH^-]$

Rise in temperature will result in more dissociation of water molecules into hydrogen ions and hydroxide ions.

With an increase in concentration of hydrogen ions and hydroxide ions value of $K_w$ will also increase.

5 0

4 years ago

Finish this statement: The colder it is the _______________ it is