1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Harlamova29_29 [7]
2 years ago
14

Hydrogen, calcium, and boron are examples of

Chemistry
2 answers:
Yakvenalex [24]2 years ago
5 0

Answer:

the correct answer is D Elements

torisob [31]2 years ago
5 0
Oh yeep thats “Elements”
You might be interested in
Which of these items best describes the arrangement of electrons in an atom of sulfur? A. Eight electrons in its first energy le
Serga [27]

D. Two electrons in its first energy level; eight electrons in its second energy level; six valence electrons in its outermost energy level.

Please correct me if I'm wrong!! :)


6 0
3 years ago
Read 2 more answers
A 0.245-L flask contains 0.467 mol co2 at 159 °c. Calculate the pressure using the ideal gas law.
lubasha [3.4K]

Answer:

Pressure, P = 67.57 atm

Explanation:

<u>Given the following data;</u>

  • Volume = 0.245 L
  • Number of moles = 0.467 moles
  • Temperature = 159°C
  • Ideal gas constant, R = 0.08206 L·atm/mol·K

<u>Conversion:</u>

We would convert the value of the temperature in Celsius to Kelvin.

T = 273 + °C

T = 273 + 159

T = 432 Kelvin

To find the pressure of the gas, we would use the ideal gas law;

PV = nRT

Where;

  • P is the pressure.
  • V is the volume.
  • n is the number of moles of substance.
  • R is the ideal gas constant.
  • T is the temperature.

Making P the subject of formula, we have;

P = \frac {nRT}{V}

Substituting into the formula, we have;

P = \frac {0.467*0.08206*432}{0.245}

P = \frac {16.5551}{0.245}

<em>Pressure, P = 67.57 atm</em>

4 0
3 years ago
The nutritional energy content (in Calories) present in 86g of broccoli with 6g of carbohydrates, 2.6g of protein, and 0.3g of f
asambeis [7]

Answer:

37.1 calories.

Approximately, 37.1 = 40 calories.

Explanation:

So, without mincing words let's dive straight into the solution to the question above.

We are given the following parameters which are going to help in solving this particular Question.

The mass of broccoli = 86g of broccoli, mass of carbohydrates present = 6g of carbohydrates, the mass of protein present = 2.6g of protein and the mass of fat present = 0.3g of fat.

Therefore, the nutritional energy content (in Calories) = (6 × 4) + (2.6 × 4) + (0.3 × 9) = 10.4 + 24 + 2.7 = 37.1

Hence, the nutritional energy content (in Calories) = 37.1 calories.

Approximately, 37.1 = 40 calories.

5 0
3 years ago
NO LINKS!!!
Alex Ar [27]
Hey there!

Static electricity is a missing charge. When positive ions are formed (where an electron is missing), this imbalance is called static electricity.

7 0
2 years ago
Read 2 more answers
Helium (He), oxygen (O), carbon (C), and selenium (Se) are all nonmetals. Using the periodic table, which pair of these nonmetal
Lisa [10]
Using the periodic table, the pair of non metals that has the most similar properties would be :
Oxygen and Selenium
at the periodic table, these both located on the same period

hope this helps
7 0
4 years ago
Read 2 more answers
Other questions:
  • What does the color and smooth texture of this
    15·2 answers
  • Chemistry:give the number of significant figures in this number: 0.025
    6·1 answer
  • This is the type of attraction that holds elements like nickel, sodium and gold together. For these elements, stationary, positi
    14·2 answers
  • How so you kniw when you need to use ate, ide, and ite
    7·2 answers
  • How many electrons does uranium have​
    15·2 answers
  • What is a primary difference between bacteria that are
    10·1 answer
  • Hello! I have a green pigment called the chlorophyll. I also absorb solar
    15·1 answer
  • Sodium is going in group 1, period 3. It contains A. One valence electron in its 3rd energy shell B three valence electron in it
    9·1 answer
  • Bill bye states that “ as more and more species disappear, it is harder and harder to keep the ecosystem in balance because we d
    10·1 answer
  • Using the solubility curves, approximately how many grams of NaNO3 can be dissolved in 100. grams of water at 80 °C?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!