Answers
Answer: Yes it's correct.
Explanation: i hoped that helped!!
Answer:
yes this is correctly done
Related Questions
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
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 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 kgExplanation:
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 kgHope this helps you
Answer:
I am so sorry but I need pts...
Explanation:
How many grams are in a sample of 0.55 mol of K?
Answers
mass =moles x Mr
So:
Moles of K - 0.55mol
Mr of K - 39.1
Mass= 0.55x39.1 =21.505g
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
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.
agree or disagree that a scientific theory can be modified provide evidence along!!!!!!!
Answers
Answer:
I agree.
Explanation:
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:
D. Science i think
Explanation:
Please help!!! I can’t figure it out!
Answers
Answer:
The third answer
Explanation:
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
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
is soil a pure or impure substance?
Answers
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:
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:
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 structure is a valid representation of a hydrocarbon molecule?
Answers
Im pretty sure it is the first one
True or False: Neutrons have both a positive and negative charge
Answers
Answer:
false
Explanation:
Answer:
false
Explanation:
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
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
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).
Please help :(
I just need the bottom true or false part
Answers
Answer:
if you mean question 21
true
Explanation:
sorry if wrong
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
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
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.
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 :)
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.
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:
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
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.