On July 4, 2020, America turned 7.69 x 10^9
seconds old. On that day, how old was America
in years? (Assume 365 days in a year)

America's age = 243.85 years

When converting units, list and multiply all the units until you find the unit you want

Time unit conversion

1 year = 365 days

1 day = 24 hours

1 hour = 3600 s

7.69 x 10⁹ seconds to years :

[tex]\tt =7.69\times 10^9~s\times \dfrac{1`hour}{3600~s}\times \dfrac{1~day}{24~hours}\times \dfrac{1~years}{365~days}\\\\=\dfrac{7.69\times 10^9}{3600\times 24\times 365}\\\\=\boxed{\bold{243.85~years}}[/tex]

How many moles of NH3 can be produced from 3.76 moles of nitrogen
in the following reaction:
N2 (g) + 3 H2 (g) → 2 NH; (g)

In an ionic bond
a. electrons are shared equally
b. protons are transferred
c. electrons are shared unequally
d. electrons are transferred

Which of the following contains the GREATEST number of atoms of argon gas?
20.0 g of Ar
5.0 L of Ar at STP
6.02 x 10^23 atoms of Ar
0.75 moles of Ar

A hypothetical element has two main isotopes with mass numbers of 59 and 62. If 73.00% of the isotopes have a mass number of 59 amu, what atomic weight should be listed on the periodic table for this element? Answer in units of amu.

If 130 J of energy were added to 1 kg of each of these samples, which would experience the GREATEST temperature
increase?

A) Aluminum
B) Brass
C) Copper
D) Platinum

Which statement describes an unanticipated impact of a technological
advance?
O A. Birds known as starlings were introduced to North America from
Europe and have since competed with native species for
resources.
O B. A laser system developed by NASA to help spaceships dock with
space stations was later adapted to help doctors perform eye
surgery.
O C. Used glass can be recycled as an additive to concrete, which gives
structures made of concrete more strength and better thermal
insulating properties.
O D. A network of undersea cables was constructed to provide Internet
connections between continents that are faster and more reliable
than other transmission methods.

A 15 % salt (NaCl)solution is made with 750.0 grams of solution. What is the mass of sodium chloride used to make the solution?

The size of the gray circle represents atomic radius, or
the size of an atom. Which area of the periodic table
has elements with the largest atomic radius?

1. An atom has 57 neutrons and 42 protons. How many electrons will this atom have if it
neutral?
57
44
42
40

Directions: Use the words in the word box to complete the following sentences.
acceleration
gravity
counteract
resistance
balanced
force
When the forces acting on an object are _______________ , there is no change in the object's motion.
A _________________ acting on a resting object can cause the object to move.
On Earth, __________________ pulls all objects toward the ground.
When a force acts in the opposite direction of another force, the forces ______________ each other.
More than one force acting on a falling object can reduce its downward ____________________.
Air _____________________ is caused by molecules of air pushing against a moving object.

Which statements describe functions of the backbone? Check all that apply.
o It supports the body's weight.
O It helps to break down food.
It surrounds and protects the brain.
It replaces the spinal cord in vertebrates.
O It allows for flexibility and movement.
It helps regulates water balance.
The answer is it supports body weight and it allows flexibility and movement

why does a liquid take the shape but not the volume of its container

The ___ has many functions; one is to regulate growth.

Selena breaks a piece off the end of a stick she found and notes that’s a physical change has occurred which of the following properties of the remaining piece of the stick has changed

The Mass of the mineral is 9.6 grams . The mineral is placed in a graduated cylinder containing 8.0 ml of water . The water rises to 16.0 ml of water. What is the Density of the mineral ?

At the top of a hlgh mountaln, the welght of an object Is:
O the same as that at sea level
O less than at sea level
Ogreater than at sea level​

FAST I NEED THIS TO STUDY MY QUIZ IS TOMORROW!!!!
How is an atom’s atomic number related to its number of protons? To its number of electrons?

A roller skater has a mass of 75 kg and accelerates at 1.5 m/s 2 squared. What is the net force acting on her?

The temperature at which a substance in its solid state melts into the same substance in a liquid is known as

What causes the change within every twenty four hours from day to night on Earth?
A)
Earth's rotation on its axis
the tilt of Earth on its axis
Tarth's revolution around the sun
the distance from Larth to the Sun
Tamashenomena on the top of the sun that appear as dark spots compar
Please answer

Does changing the number of neutrons change the identity of the element you have built?

what types of cells did Matthias Schleiden study?... HELP PLZ!!!

Burning is a type of_________reaction.

O replacement
O decomposition
O synthesis
O combustion

Which of the following configurations would form a bent molecule?
A. A molecule with three bound atoms and no lone electron pairs
B. A molecule with two bound atoms and no lone electron pairs
C. A molecule with one bound atom and two lone electron pairs
D. A molecule with two bound atoms and one lone electron pair

PLZ HELP ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

which of these elements is most likely to be magnesium the most metallic of all samples?

HELP!!!!PLEASE which to terms describe how waves the them blue light are different from waves of bright red light? A. Higher amplitude B. Lower amplitude C. Longer wavelength D. Shorter wavelength choose two answers

HELP ME ASAP PLEASE IDK THIS

A sample of a gas occupies 6.00 liters at a temperature of 200 K. If the pressure remains constant and the temperature is raised to 600 K, the volume of gas sample would be 1.)18.0 L 2.)2.00 L 3.)3.00 L 4.)12.0 L​

There is no pattern between boiling point and where the substance is located on the periodic table.
O True
O False