CHEMISTRY HIGH SCHOOL

A 12 kg object experiences a net force of 120 N. What acceleration will this object experience?

Answers

Answer 1

Answer:

Answer:

10 m/s²

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

$a = (f)/(m) \n$

f is the force

m is the mass

From the question we have

$a = (120)/(12) \n$

We have the final answer as

10 m/s²

Hope this helps you

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Multiple answers are allowed.

Why are alloys preferable at times?

Answers

Alloys are preferable at times because they offer interesting properties than pure metal. Alloys are made in order to modify or enhance properties, especially mechanical properties. Examples are stainless steel, brass and wrought iron.

Which substances have atoms of the same element but different molecular structures?A. He(g) and Ne(g)
B. K(s) and Na(s)
C. O2(g) and O3(g)
D. P4(s) and S8(s)

Answers

Answer: Th correct answer is option C.

Explanation:

Atoms are the smallest unit of a chemical element.

An element is defined as the simplest substance which cannot be further divided.

A molecule is defined as the combination of two or more atoms of same or different elements.

Fro the given options, option 3 and 4 are the molecules, but Option 3 has the different number of atoms of same element. These molecules have different molecular structures.

$O_2$ is the oxygen gas and $O_3$ is ozone.

Hence, the correct answer is option C.

You can see that's C.
Both $O_2$ and $O_3$ have atoms of oxygen but the first molecule is diatomic but the second is triatomic.

What location is 90 degrees away from the equator?A) The south pole
B) Polaris
C) Both A & B
D) The north pole

Answers

C) both A and B

Each parallel measures one degree north or south of the Equator, with 90 degrees north of the Equator and 90 degrees south of the Equator
Hope this helps!

Answer:

C) Both A and B

Explanation:

The axis of 0 degrees latitude is known as the Equator. With 90 degrees north of the Equator and 90 degrees south of the Equator, each parallel measures one degree north or south of the Equator. The North Pole is 90 degrees north latitude, and the South Pole is 90 degrees south latitude.

How many molecules are in 2.6 grams H4C

Answers

Molar mass of H4C = 1 * 4 + 12 = 16 g/mol

Number of moles:

n = m / mm

n = 2.6 / 16

n = 0.1625 moles

Number of molecules:

number of moles * 6.02x10²³

0.1625 * 6.02x10²³

= 9.78x10²² molecules

hope this helps!

When lithium reacts with bromine to form the compound LiBr, each lithium atom:(1) gains one electron and becomes a negatively
charged ion
(2) gains three electrons and becomes a negatively
charged ion
(3) loses one electron and becomes a positively
charged ion
(4) loses three electrons and becomes a positively
charged ion

Answers

(3) loses one electron and becomes positively charged
Lithium has one valence electron and Bromine has seven. Therefore Lithium will give up its one to Bromine for both to have an octet

Answer:

loses one electron

Explanation:

A sample of CO2(s) and a sample of CO2(g) differ in their1) chemical compositions
2) empirical formulas
3) molecular structures
4) physical properties

Answers

The correct answer is D.
CO2(s) is a solid.
CO2(g) means it is gas.

So they differ in their physical properties.
Physical propertiers means that they differ in their look.

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