CHEMISTRY HIGH SCHOOL

Q4. What are the different ways in which human being use rocks ?

Answers

Answer 1

Answer:

Answer:

To hit someone on the head

Explanation:

self protection

Related Questions

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Magnesium and nitrogen react in a combination reaction to produce magnesium nitride: 3 Mg + N2 → Mg3N2 In a particular experiment, a 9.27-g sample of N2 reacts completely. The mass of Mg consumed is __________ g.
Calculate the density of argon gas at a pressure of 753 mmHg and a temperature of 35 °C
How does the rule of zero charge help you predict the formula of an ionic compound?
Name 4 toxicants that are heavier than air

The central core of an atom is called thea. reactor vessel.
b. neutron.
c. proton.
d. nucleus.

Answers

Answer:

The central portion is called neutron.

Explanation:

An atom has a central part known as nucleus and outer shells.

The central nucleus contains protons (the positively charged sub atomic particle) and neutrons (the neutral sub atomic particle).

The outer portion has negatively charged sub atomic particle known as electrons.

The atomic number of an element is the number of protons present in the nucleus.

Answer:

The Answer is Nucleus

Explanation:

The Nuleus is the brain of the atom always like the "boss"

How many moles are equal to 89.23g of calcium oxide?

Answers

mass of calcium oxide equals 89.23 g

molar mass of calcium oxide equals 56 G / Mole

the formula which is used as much of CaO equals molar mass of CaO

now put all of the Given values in this formula, we would get the moles of calcium oxide.

moles of CaO= 88.23g over 56g/mole which would get you 1.593 moles

Friends can __________. A.

help you learn about yourself and how to get along with others

B.

show you a different aspect of the world

C.

give you a sense of belonging and a safe place to talk

D.

all of the above

Answers

Answer:

the answer would be d. all of the above

How many moles are in 4.818 x 1024 chloride ions

Answers

Answer:

The answer is 8.00 moles

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = (N)/(L) \n$

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

$n = \frac{4.818 * {10}^(24) }{6.02 * {10}^(23) } \n = 8.00332225...$

We have the final answer as

8.00 moles

Hope this helps you

In Rutherford’s gold foil experiment, many of the alpha particles passed straight through the gold foil, completely undeflected. What did Rutherford conclude from this observation? A. Alpha particles have a positive charge.

B. Electrons have a negative charge.

C. An atom is made up of mostly empty space.

D. There is a dense area within an atom that has a negative charge.

Answers

Answer: C

Explanation:

Rutherford's Gold Foil Experiment

These were his conclusions.

Aimed beam of alpha particles at a thin piece of gold foil and found most of the particles passed through the gold foil without being scattered, except for a few particles.
He found the volume of an atom is mostly empty space.
He proposed there is a heavy, positively charged body at the center of each atom that contains most of the mass.
Electrons are throughout the atom.
Number of electrons outside the nucleus equals the number of protons in the nucleus. Atom is electrically neutral.

A sample of gas in a balloon has an initial temperature of 2.0 ∘C and a volume of 1.53×103 L . If the temperature changes to 99 ∘C , and there is no change of pressure or amount of gas, what is the new volume, V2, of the gas?