Which term means finding ways to describe and explain the natural world
through observations and experiments?
A. Pseudoscience
B. Philosophy
C. Chemistry
D. Science

Answers

Answer 1

Answer:

D. Science i think

Explanation:


Related Questions

agree or disagree that a scientific theory can be modified provide evidence along!!!!!!!

Answers

Answer:

I agree.

Explanation:

Which structure is a valid representation of a hydrocarbon molecule?

Answers

Im pretty sure it is the first one

Which of these elements is the most chemically reactive?
A zinc (Zn)
B. iron (Fe)
C. potassium (K)
D. germanium (Ge)

Answers

Answer:

a zinc is the most reactive

Identify the following examples as either physical or chemical change.
(Ill give brainliest if right)

Answers

Answer:

7. Chemical

8. Chemical

9. Physical

10. Physical

11. Physical

12. Physical

Explanation:

How many grams are in a sample of 0.55 mol of K?

Answers

The equation you use here is
mass =moles x Mr

So:
Moles of K - 0.55mol
Mr of K - 39.1

Mass= 0.55x39.1 =21.505g

PLEASE HELP!!!!! NEED HELP ASAP!!!!!

Write the chemical formula for the ionic compounds below
EXAMPLE- Calcium Phosphide= Ca3P2

Magnesium chloride=
Aluminum Fluoride=
Lithium Bromide=
Potassium Sulfide=

Answers

Answer:

down below

Explanation:

MgCl2

AlF3

LiBr

K2S

Please help :(
I just need the bottom true or false part

Answers

Answer:

if you mean question 21

true

Explanation:

sorry if wrong

Substance
Formula
Mass,
(g)
Physical Color
State
Density Boiling
, (g/cm) Point,
Methane
сн.
16.0
Gas
Colorless
0.423
-161.5
Ammonia
NH,
17.0
Gas
Colorless
0.70
-33
Unknown
???
???
???
???
???
???
Propane
CH
44.1
Gas
Colorless
0.493
-12.1
Bromine
Br.
159.8
Liquid
Red
4.04
58.8
Lithium
Li
6.94
Solid
0.534
1342
Silvery,
white
metal
Magnesium Mg
24.3
Solid
1.74
1090
Silver,
white
metal

Answers

Answer:what are u asking to do?

Explanation:

You are at a carnival fun house standing 3m in front of a lens with a focal length of 2.5m. What would happen to your image if the lens was concave? What would the image look like if the lens was convex?

Answers

The convex lens would produce a virtual

I need help with the bottom part of the paper

Answers

Answer:

ur really pretty :)

Explanation:

plssss help for a and b and if possible pls give an explanation but you don’t have to!

Answers

Answer:

0 net force it is balanced

Explanation:

If the amount of force is the same on both sides the net force equals 0

How much water (H2O ) would form if 4.04 g of hydrogen (H2) reacted with 31.98 g of oxygen (O2 )?
(2H2 + O2 2H2O)

Answers

Answer:

Mass = 36 g

Explanation:

Given data:

Mass of water formed = ?

Mass of hydrogen = 4.04 g

Mass of oxygen = 31.98 g

Solution:

Chemical equation:

2H₂ + O₂   →   2H₂O

Number of moles of hydrogen:

Number of moles = mass/molar mass

Number of moles = 4.04 g/ 2 g/mol

Number of moles = 2.02 mol

Number of moles of oxygen:

Number of moles = mass/molar mass

Number of moles = 31.98 g/ 32 g/mol

Number of moles = 1.0 mol

Now we will compare the moles of water with hydrogen and oxygen.

                O₂         :         H₂O

                 1           :           2

                H₂         :         H₂O

                 2          :          2

               2.02       :      2.02

Number of moles of water formed by oxygen are less thus oxygen will limiting reactant.

Mass of water:

Mass = number of moles × molar mass

Mass = 2 mol × 18 g/mol

Mass = 36 g

What is the pressure inside a 2.0 L bottle filled with 0.25 mol of carbon dioxide gas at 25 °C?

Answers

Answer:

3.1atm

Explanation:

Given parameters:

Volume of gas = 2L

Number of moles  = 0.25mol

Temperature  = 25°C = 25 + 273  = 298K

Unknown:

Pressure of the gas = ?

Solution:

To solve this problem, we use the ideal gas equation.

This is given as;

       PV  = nRT

P is the pressure

V is the volume

n is the number of moles

R is the gas  constant  = 0.082atmdm³mol⁻¹K⁻¹

T is the temperature

          P  = [tex]\frac{nRT}{V}[/tex]  

 Now insert the parameters and solve;

         P  = [tex]\frac{0.25 x 0.082 x 298}{2}[/tex]   = 3.1atm

Please help!!! I can’t figure it out!

Answers

Answer:

The third answer

Explanation:

melting is considered a(n) ___ change because energy is gained by the substance as it changes state
A. Physical.
B. Chemical.
C. Volume.
D. Dynamic.

Answers

melting is a physical change

Which of the choices is an example of an element?
O CO
O Co
O C2H2O2
O CO2

Answers

Answer:

Co(cobalt) is the answer

Explanation:

Cobalt is a chemical element with the symbol Co and atomic number 27. Like nickel, cobalt is found in the Earth's crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal.

True or False: Neutrons have both a positive and negative charge

Answers

Answer:

false

Explanation:

Answer:

false

Explanation:

1 mol of titanium,
Ti, is 47.88 g is that true?

Answers

Answer: True.

Explanation:

Molar mass is the mass of a given substance divided by the amount of that substance, measured in g/mol. For example, the atomic mass of titanium is 47.88 amu or 47.88 g/mol. In 47.88 grams of titanium, there is one mole, or 6.022 x 1023 titanium atoms.

The characteristic molar mass of an element is simply the atomic mass in g/mol. However, molar mass can also be calculated by multiplying the atomic mass in amu by the molar mass constant (1 g/mol). To calculate the molar mass of a compound with multiple atoms, sum all the atomic mass of the constituent atoms.

For example, the molar mass of NaCl can be calculated for finding the atomic mass of sodium (22.99 g/mol) and the atomic mass of chlorine (35.45 g/mol) and combining them. The molar mass of NaCl is 58.44 g/mol.

molecules are always moving no matter what phase they are in solid liquid gas

true or false

Answers

Answer:

Solids - vibrational (and rotational); moving very slowly.

Liquids - vibrational, rotational, and translational; moving quickly.

Gases - vibrational, rotational, and translational; moving very quickly.

Explanation:

Particles are always moving. No matter what. There is a certain point where they move so slowly it is considered minuscule, but they are in fact moving.

Thus, in solids, liquids, and gases, you can expect particles to move in a certain trend. That trend is average kinetic energy of the particles and the forces holding them together (attraction).

Suggest a change of state, other than ice melting, that is an endothermic
process.​

Answers

Answer:

Vaporization and Sublimation

Explanation:

Answer:

Well there's solid states, liquid states, and gas states in matter.

An atom with which atomic diagram is most similar to calcium?

Answers

Answer:

C

Explanation:

Calcium is an element with a total of 20 electrons.

 It has 4 shells with a configuration of:

          2, 8, 8, 2

Option C is the most similar to calcium but the number of shells is not complete.

It still requires two more shells with 8 and two electrons respectively.

which best explains why a scientist would share these details in a conference?


a it tells the audience if the results support or contradict the hypothesis

b it tells the peers if the study is supported by mathematical models

c it informs the peers of the results are supported by other scientists

d it informs the audience if the study included controlled tests

Answers

The question is incomplete, the complete question is; During a conference presentation, a scientist described the materials that she used and how she performed her experiments.

Which best explains why a scientist would share these details in a conference?

It tells the audience if the results support or contradict the hypothesis.

It tells the peers if the study is supported by mathematical models.

It informs the peers if the results are supported by other scientists.

It informs the audience if the study included controlled tests.

Answer:

It informs the audience if the study included controlled tests.

Explanation:

Usually, scientific conferences involve presentation of papers by scientists. These paper presentations are actually the sharing of details of the scientific research carried out by other scientists.

Presenting the materials and methods section of the a research project  to a scientific conference informs the audience if the study included controlled tests.

The inclusion of controlled tests in a scientific study enhances the validity of the results obtained in the study.

is soil a pure or impure substance?​

Answers

Impure substance, because pure would be dirt from the earth
Soil is a impure substance

A 2.9 kg model rocket accelerates at 15.3 m/s2 with a force of 44 N. Before launch, the model rocket was not moving. After the solid rocket engine ignited, hot gases were pushed out from the rocket engine nozzle and propelled the rocket toward the sky.

Which of Newton’s laws apply in this example? Check all that apply.

Answers

Answer:

newton's firts law

Explanation:

because it states that everybody continue its state in rest unless an external force is appy to change its state from rest to motion.

Answer:

A, B, C

Explanation:

Which event most likely occurs at point V?

cooling
erosion
heating
melting



I will mark Brainlyest and 20 points

Answers

[tex]\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}[/tex]

Actually Welcome to the Concept of the Geography.

Answer is 1.) Cooling.

On cooling of magma, we get the hardened igneous rocks in the nature.

Answer:

Cooling

Explanation:

I did quiz

why do chemical equations have to be equal

Answers

Answer:

Every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. Therefore, there must be the same number of atoms of each element on each side of a chemical equation.

Explanation:

YW :)

What is the mass of an object that is accelerated 4 m/s2 by a force of 180 N?
kg
Asap!!!!!!!

Answers

Answer:

The answer is 45 kg

Explanation:

The mass of the object can be found by using the formula

[tex]m = \frac{f}{a} \\ [/tex]

f is the force

a is the acceleration

From the question we have

[tex]m = \frac{180}{4} \\ [/tex]

We have the final answer as

45 kg

Hope this helps you

Answer:

I am so sorry but I need pts...

Explanation:

From smallest to largest put these in order of their atomic radius Mg, Ba,
Sr, Ca
O Ca, Mg, Ba, S
O Ra, Sr, Ca, Mg
Mg, Ca, Sr, Ra
Mg, Sr, Ra, Ca

Answers

Answer:

b

Explanation:

i jus did it

What mass of NO2 can be produced when 678 mL of oxygen at STP and 256 grams of NH3 are mixed together?

Answers

Answer:

WHT55

Explanation:

i experianced this before

Describe the ammonium ion, NH4+, and the sulfate ion, SO42-. What compounds would these ions form with potassium and fluoride ions? Write the formula units for the resulting compounds.

Answers

Explanation:

Ammonium Fluoride and Potassium Sulphate

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