How was Dr. Martin Luther King , Jr. , an important force in creating a more just world ?

Answer:

Martin Luther King, Jr. worked hard to bring greater equality to America and ensure civil rights for all people, regardless of race.

draw a segment of polybutadiene containing three monomer units. connect each end of the segment with a bond to one of the r groups. the r groups represent the connecting carbon atoms in the monomers adjacent to the segment. be sure to draw all hydrogen atoms.

Some copper is palced in a previouly weighted crucible and reweighed .
Mass of crucible + copper = 5.92g
Mass of crucible = 4.65g
Clculate the mass of copper used in the experiment

Why Leaves Change Color in the Fall

The electron configuration for Helium (He) is shown below.

1s2

Which diagram shows the correct distribution of electrons in the electron shells of a helium atom?

24) When salt and water are mixed, they form a solution like in the ocean. When sand and
water are mixed, they form a mixture where the sand does not dissolve. Which statement
might summarize this observation?
A) Mixtures and solutions are the same.
B) All substances mixed with water are solutions.
In mixtures, you cannot see the separate substances.
D) In solutions, you cannot see the separate substances.

PLS HELP

1. Describe the structure of atoms, including the electrical charges, the location (in or out of nucleus) and atomic mass (1 amu or
less than 1 amu) of the following particles:

I need help with this question please

Do all particles pass right through the atoms undeflected?​

Carbon tetrachlordie (CCI4) is ___

A. iconic

B. Covalent

HELP IM BEING TIMED: science

A negatively charged balloon comes close to a positively charged cloth. What will happen?
A. Nothing will happen.
B. The balloon will be attracted to the cloth.
C. The balloon will repel the cloth.
D. There will be a change of shape.

An atom that gains one extra electron forms an ___________with a 1- charge.

Rita measures the temperature of a pot of hot water and finds that it is 85.6
°C. What is this temperature in °F?
A. О 96.5 °F
B. O 212 °F
C. O 79.6 °F
D. O 186 °F

water is formed when 48g of oxygen combine with 6g of hydrogen. what mass of oxygen combines with 2g of hydrogen

Two pendulums colliding are example of?

Which of the following is similar in size to an atom?
O A ball used in sports, such as a basketball
O A large building, similar to a shopping mall
O A particle you cannot see with your eyes
O A seed of a fruit from an apple or orange

write True If the statement Is Correct And False If Not​

I need help with this

Suppose that you are dissolving a solute into 500 mL of water at 0°C. You find that no more than 495 g of solute will dissolve. Calculate the solubility of the solute in g/L.

Chemical & Earth Science Name:______________________________________

Date: ________________________________

Nonmetals & Metalloids Worksheet

Write the letter of the correct answer on the line at the left.


1. _____ Which of the following is NOT a

property of most nonmetals?

A found on the right side of the

periodic table

B solids tend to be dull and brittle

C excellent electric conductivity

D many are gases at room temperature


3. _____ Two of the same atoms bonded

together is called a(n)

A isotope

B diatomic molecule

C binary atom

D semiconductor


2. _____ The only nonmetal in Group 14 is

A carbon

B oxygen

C nitrogen

D fluorine



4. _____ The highly reactive nonmetals of

Group 17 are called the

A noble gases

B metalloids

C halogens

D actinides


If the statement is true, write true. If the statement is false, change the underlined word

or words to make the statement true.

5. ___________________ Atoms of nonmetals usually lose electrons when they combine

with other atoms.

6. __________________ When two or more atoms bond by sharing electrons, they form

a molecule.

7. __________________ The elements that have some properties of metals and some

properties of nonmetals are called halogens.

8. __________________ Helium has chemical properties so different from those of the

other elements that it cannot be placed in any group.

9. __________________ Substances that can carry electric current under some

conditions but not under others are called semiconductors.

10. __________________ The Group 15 element oxygen is used to make compounds

known as fertilizers.

balance CHCl3 + O2 = CO2 + H2O + Cl2

1) What is the time a projectile object is in flight (in the air) if it is launched at a velocity of 15
m/s at an angle of 37 degrees?

2) What is the range (horizontal distance traveled) of this object?

3) What is the time a projectile object is in flight (in the air) if it is launched at a velocity of 47
m/s at an angle of 15 degrees?

4) What is the range (horizontal distance traveled) of this object?

5) What is the time a projectile object is in flight (in the air) if it is launched at a velocity of 60
m/s at an angle of 55 degrees?

6) What is the range (horizontal distance traveled) of this object?

What can you say about the reactants of photosynthesis and the products of cellular respiration?​

discrib acidic oxide that can be Thermal Decomposetio of carbonat​

Element with the largest electron cloud

This table displays which one is it A. Price values of the metals ,B. Physical properties of the metals ,C. Chemical properties of the metals ,D. Corrosive resistance of the metals

Which of the ions below has the following of election configuration?

1s2 2s2 2p6 3s2 3p6 3d10

A.Co2+

B.Zn2+

C.Cu2+

D.Ni2+

An unknown element X forms a compound with chlorine: XCL2. Predict the chemical formula of the compound that element X makes with oxygen. Justify your answer.​

why does magnesium in an aqueous solution of magnesium chloride conduct electricity but solid magnesium chloride does not?

When asked why a chlorine atom gains one electron to form an anion with a 1- charge, a classmate answered, "Because noble gas configurations are stable." Is this statement generally true?

What gas in our atmosphere is thought to have come from plants and algae alone?