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
sesenic [268]
3 years ago
15

Help me with this, please. Thanks

Chemistry
1 answer:
Len [333]3 years ago
8 0
Answer ———hardness ...........
You might be interested in
815 yd to km (need 3 sig fig)
SpyIntel [72]

<u>Answer:</u> The correct answer is 0.745 km

<u>Explanation:</u>

We are given:

A numerical value of 815 yards

To convert this into kilometers, we use the conversion factor:

1 km = 1093.6 yards

Converting the given value into kilometers, we get:

\Rightarrow 815yd\times \frac{1km}{1093.6yd}=0.745km

Hence, the correct answer is 0.745 km

5 0
3 years ago
Compare the following sodium atoms in terms of their neutrons and mass numbers 24Na, 23Na​
olga_2 [115]

Na-24 and Na-23 have the same number of atoms=11, different neutrons(13 and 12),different mass number(24 and 23)

<h3>Further explanation </h3>

The elements in nature have several types of isotopes

Isotopes have the same number of protons and having a different number of neutrons.

So Isotopes are elements that have the same Atomic Number (Proton)

  • ₁₁²³Na

number of atoms = 11

mass number = 23

number of neutrons=23-11=12

  • ₁₁²⁴Na

number of atoms = 11

mass number = 24

number of neutrons=24-11=13

7 0
3 years ago
Choose the correct order of electron structures from largest to smallest.
Yakvenalex [24]
A. <span>principal energy level, sublevel, orbital, electron</span>
6 0
3 years ago
Read 2 more answers
According to the octet rule, atoms tend to gain, lose, or share electrons until they are surrounded by ________ valence electron
Mazyrski [523]
According to the octet rule, atoms tend to gain, lose, or share electrons until they are surrounded by__8__ valence electrons.
6 0
2 years ago
Find the final pressure of gas at 150k. If the pressure of the gas is 210 kPa at 120 K.
katrin [286]
Since the volume is constant,
p1/t = p2/ t
210/120 = p2/150
p2= 262.5kpa
4 0
3 years ago
Other questions:
  • It takes 11.2 kj of energy to raise the temperature of 145 g of benzene from 22.0°c to 67.0°c. what is the specific heat of benz
    12·1 answer
  • What elements do not fit the pattern of electron affinity
    14·1 answer
  • A solution contains 225 g of glucose, c6h12o6, dissolved in enough water to make 0.825 l of solution. what is the molarity of th
    8·1 answer
  • Using your senses to gather information is called
    9·1 answer
  • How does density differ from concentration?
    6·1 answer
  • When dynamic equilibrium is achieved, the rate of the forward and backward reactions go to zero. (T&amp;F)
    12·1 answer
  • Which type of disease is caused by pathogens?<br><br> a(n) <br> disease
    9·1 answer
  • How many significant figures are in 195.01
    11·1 answer
  • A ball has a mass of 2.0 kg and travels a distance of 24 meters in 10 seconds what is the Velocity
    5·1 answer
  • suppose a student poured equal volumes of water and naoh in two different flasks. he forgets to label his flasks and is confused
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!