Respiration changes:

Two friends are arguing about the structure of the universe. Caleb says that the universe is made of many galaxies that are

Nadusha1986 [10]

Answer:

i put b but im not that sure

Explanation:

4 0

3 years ago

Summary the vegetables oil

alekssr [168]

Introduction. Vegetable oils are a group of fats that are derived from some seeds, nuts, cereal grains, and fruits. ... Vegetable oils, as used in foods, are comprised of complex mixtures of triacylglycerols (TAGs; usually > 95%) with some minor amounts of diacylglycerols (usually < 5%).

4 0

3 years ago

Which of the following is true of a compound but not a mixture? (1) A compound contains more than one element.

otez555 [7]

The composition of a compound does not vary because it is made up of fix ratio by mass.

<h3>What is compound?</h3>

A compound is a chemical substance that is composed of more than one element that held together by chemical bonds and produces fix ratio by mass so we can conclude that the composition of a compound does not vary because it is made up of fix ratio by mass.

Learn more about compound here: brainly.com/question/634206

7 0

3 years ago

Nuclei with the same mass number but different atomic numbers are called isobars. Consider Ca-40, Ca-41, K-41 and Ar-41. (a) Whi

SVETLANKA909090 [29]

Answer:

Part a:

Isobars: Ca-41, K-41 and Ar-41

Part b:

Number of proton

Part c:

Incorrect statement

Explanation:

Part a:

Nuclei with same mass number are called isobars.

Given:

Ca-40, Ca-41, K-41 and Ar-41

Ca-41, K-41 and Ar-41 have equal mass numbers, so these are isobars.

Part b:

Atomic number of Ca = 20

Atomic no. = Number of proton.

So, Ca-40 ans C-41 have same number of proton or in other words proton count is common in both.

Part c:

Number of neutrons in Ca-41

Atomic number = 20

Mass number = 41

Number of neutron = Mass number -atomic number

= 41 -20 = 21

Number of neutrons in K-41

Atomic number = 19

Mass number = 41

Number of neutron = Mass number -atomic number

= 41 -19 = 22

Number of neutrons in Ar-41

Atomic number = 18

Mass number = 41

Number of neutron = Mass number -atomic number

= 41 -18 = 23

So, the statement is incorrect.

3 0

3 years ago

Chromium has four naturally occuring isotopes. Cr-50 (mass of 49.946 amu and 4.35% abundance); Cr-52 (mass of 51.941 amu and 83.

Lemur [1.5K]

Answer:

B) 52.000 amu.

Explanation:

An element can have differing numbers of neutrons in its nucleus, but it always has the same number of protons. The versions of an element with different neutrons have different masses and are called isotopes.

The average atomic mass for an element is calculated by summing the masses of the element’s isotopes, each multiplied by its natural abundance on Earth.

Average atomic mass of P = ∑(Isotope mass)(its abundance)

∴ Average atomic mass of Cr = (Cr-50 mass)(its abundance) + (Cr-52 mass)(its abundance) + (Cr-53 mass)(its abundance) + (Cr-54 mass)(its abundance)

Abundance of isotope = % of the isotope / 100.

∴ Average atomic mass of Cr = (49.946 amu)(0.0435) + (51.941 amu)(0.8379) + (52.941 amu)(0.095) + (53.939 amu)(0.0236) = 52.000 amu.

So, the right choice is: B) 52.000 amu.

8 0

4 years ago