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
sveta [45]
3 years ago
7

An adaptation is a change that _____

Chemistry
1 answer:
aksik [14]3 years ago
7 0
The answer you are looking for is

B) Helps a species survive.

Hope I helped!

You might be interested in
Which part of an atom has most of its mass? electrons neutrons nucleus protons NextReset
sergey [27]
C) Nucleus...... Hope it helps, Have a nice day :)
3 0
3 years ago
Give the nuclear symbol for the isotope of gallium, ga, that contains 40 neutrons per atom. Replace the question marks with the
Cerrena [4.2K]

The nuclear symbol of an element have three parts namely:  

  1. the symbol of an element
  2. mass number of the element
  3. atomic number of the element

The general representation is as:

_{Z}^{A}X

where X is the chemical symbol of the element, A is mass number of the element that is total number of neutrons and protons in the nucleus of an atom, and Z is atomic number of the element that is number of protons in the atom.

Element = Gallium, Ga    (given)

Number of neutrons = 40 (given)

Let the nuclear symbol be _{?}^{?}Ga. So, we need to determine the values of "?" in the symbol.

Atomic number of Gallium, Ga = 31

Since, atomic number = Number of protons.

So, number of protons of Gallium, Ga = 31

Mass number = number of protons + number of neutrons

Substituting the values:

Mass number = 31+40 = 71

So, the nuclear symbol is _{31}^{71}Ga.

7 0
3 years ago
216 grams of carbon 36 grams of hydrogen and 288 grams of oxygen whats the empirical formula
schepotkina [342]
Divide each wight by the  relative atomic mass

C = 216 / 12 =  18
H = 36 / 1 = 36
O = 288/16 = 18

Ratio of C:h:O = 1:2:1

Empirical formula is CH2O   Could be formaldehyde HCHO.
4 0
3 years ago
How do you figure out how many valence electrons an element has?
Alik [6]
It's how many are in the element's outer layer. The layers go: 2, 8, then 8.

Ex-6 electrons. 1 layer is 2, the next layer has 4 left. If that layer holds 8, you can do 8-4 and it has 4 valence electrons.

Ex-10 electrons. 1 layer is 2, the next layer has 0 left. It has 8 valence electrons because the outermost layer is full with 8.

ex-11 electrons. 1 layer is 2, the next layer is full as well. 2+8=10; it has 1 left. So that element has only one valence electron.
4 0
3 years ago
Read 2 more answers
Consider the following unbalanced particulate representation of a chemical equation:
nevsk [136]

Answer:

H2 + I2 --> 2HI

Explanation:

The two reactants are diatomic molecules because they contain two atoms of the same element. Therefore, they would need to have a subscript of "2" next to their symbols.

When balancing an equation, you want the same amount and type of atoms on both sides. By adding a coefficient of "2" in front of the product, two H's and two I's are now on both sides.

3 0
3 years ago
Other questions:
  • Uranium is a metallic element that is used in nuclear reactors and nuclear weapons. the vast majority of uranium found on earth
    11·1 answer
  • What would be the final volume of the new solution if the 0.2 m solution on the left were diluted to 0.04 m? ml quizley?
    15·1 answer
  • Someone send me a pic of a safety cartoon [drawn] neatly and all it needs is
    12·1 answer
  • Sk☺️<br> otp pt2 gt p npp l l li p put pylop lolky g hn
    7·1 answer
  • Vitamin C has the formula CxHyOz. You burn 0.778 g of the compound in a combustion analysis chamber and isolate 1.17 g of CO2 an
    9·1 answer
  • Which liquids are highly sensitive to both changes in temperature and changes in the electrical field?
    14·2 answers
  • H:C::C:H<br> is the following molecule polar or nonpolar
    15·1 answer
  • If there are 100 black beans, 27 brown beans, and 173 white beans in the container, what is the percent composition of the conta
    6·1 answer
  • . How many grams of water would require 4400 joules
    14·1 answer
  • 14. What volume of water vapor in liters could be generated at 1.01 atm and 420. K by the combustion of 273.36 grams of oxygen g
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!