Answer:
Protons are the positive parts in an atom, they are positively charged and they are located in the nucleus of an atom..
Explanation:
prolly not the best explanation but hope it helps <3
¿Cuál de estas sustancias exhibe combustibilidad?
El acero.
El hierro.
El vidrio.
El papel.
Answer:
Acero
Explanation:
Match the parts of the element box as is making a periodic table key
Answer:
10 is the atomic number
Ne is the chemical symbol
Neon is the element name
20 is the atomic mass
Which of these molecules is polar?
A.
N2
B.
NaCl
C.
HF
D.
CH4
Answer:
C
Explanation:
.........................
what is screening effect how does it relate to effective nuclear charge
How many atoms of hydrogen are in 10.25 grams of
water?
PLEASE HELP!! ASAP WILL GIVE BRAILIST (please explain how you got there or show a picture of work)
a) Write the word equation for the reaction of silver chlorate reacts with sodium phosphate to produce silver phosphate and sodium chlorate.
b) Write the balanced formula equation for this reaction.
c) If 287 g of silver chlorate reacts with 52.8 g of sodium phosphate, what is the maximum number of grams mass of silver phosphate will be produced?
d) Identify which reactant is the limiting reactant and which is the excess reactant.
e) How many grams of the excess reactant reacts and how many grams are left over?
Answer:
See Explanation
Explanation:
a) The word equation is;
silver chlorate + sodium phosphate ------> silver phosphate + sodium chlorate
b) The balanced reaction equation of the reaction is;
3AgClO3(aq) + Na3PO4(aq) ------->Ag3PO4(s) + 3NaClO3(aq)
c) amount of silver chlorate reacted = 287 g/191.319 g/mol = 1.5 moles
3 moles of silver chlorate yields 1 mole of silver phosphate
1.5 moles of silver chlorate yields 1.5 * 1/3 = 0.5 moles of silver phosphate
Amount of sodium phosphate reacted = 52.8 g/163.94 g/mol = 0.3 moles
1 mole of sodium phosphate yields 1 mole of silver phosphate
0.3 moles of sodium phosphate yields 0.3 moles of silver phosphate.
Hence the maximum number of grams mass of silver phosphate produced = 0.3 moles * 418.58 g/mol = 125.6 g
d) The excess reactant is silver chlorate while the limiting reactant is sodium phosphate
e) 3 moles of silver chlorate reacts with 1 mole of sodium phosphate
x moles of silver chlorate reacts with 0.3 moles of sodium phosphate
x = 3 * 0.3 = 0.9 moles of silver chlorate reacted
Mass of 0.9 moles of silver chlorate = 0.9 moles * 191.319 g/mol = 172 g of silver chlorate
Hence mass of silver chlorate left over = 287 g - 172 g = 115 g
Which indicator would tell scientists the most about future climate change
How many grams of water are needed to produce 8.11 mol of tetraphorsphorus decaoxide? P4 O10 (s) + 6 H2 O (l) → 4 H3 PO
Answer:
https://brainly.com/question/23218880?answering=true&answeringSource=userQuestions%2FprofilePage%2F1
Explanation:
Answer:
bx id k
Explanation:
What of the following is NOT a common property of metals?
Answer:
liquid at room temperature
mercury is an exception to that though
If I have an unknown quantity of gas at a pressure of 0.72 atm, a volume of 22
liters, and a temperature of 30° C, how many moles of gas do I have?
Answer:
0.64 mol
Explanation:
Using ideal gas equation as follows;
PV = nRT
Where;
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK)
T = temperature (K)
According to the information provided in this question;
P = 0.72atm
V = 22 L
T = 30°C = 30 + 273 = 303K
n = ?
Using PV = nRT
n = PV/RT
n = (0.72 × 22) ÷ (0.0821 × 303)
n = 15.84 ÷ 24.88
n = 0.64 mol
Which of the following is an acceptable method to directly measure volume using the metric system?
A.
Using a balance scale to measure pounds.
B.
Using a graduated cylinder to measure liters.
C.
Using a graduated cylinder to measure gallons.
D.
Using a balance scale to measure grams.
Answer:
c
Explanation:
when measuring liquids you use liters
The acceptable method to directly measure volume using the metric system using a graduated cylinder to measure gallons. Thus, option C is correct.
What is proportion?The angles and relative measurements of a polished gem and the relationships between them are called proportion. Proportion is defined as equation in which two ratios are set equal to each other.
The relationship among the different things or parts with respect to comparative size, degree and number. There are several types of proportion and these are direct proportion, compound proportion, continued proportion, and inverse proportion.
Gravitational force is a force which act on objects which have a matter i.e a object which contains mass. Gravitational force is force which act between two objects which have a mass and both object are try to attract each other.
Therefore, The acceptable method to directly measure volume using the metric system using a graduated cylinder to measure gallons. Thus, option C is correct.
Learn more about proportion here:
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Which of the following equilibria would not be affected by a pressure change?
1) C2H4(g) + H2O(g) = C2H5OH(g)
2) 4HCl(g) + O2(g) = 2H2O(g) + 2Cl2(g)
3) PF3Cl2(g) = PF3(g) + Cl2(g)
4) CO(g) + H2O(g) = H2(g) + CO2(g)
Answer:
C2H4(g) +H2O(g)=C2H5OH(g)
dose my hair look good
Answer:very blurry but yes
Explanation:
A greater force is required to move an object with a larger mass than one with a smaller
mass.
Answer:
Explanation:
what do u need to know
Which of the following best describes where cellular respiration occurs?
O A. In muscle cells
B. In the lungs
C. In every body cell
D. In the intestines
Answer:
The answer is 'C. In every body cell'
Explanation:
I hope this was helpful, have a blessed day.
Use
your table of values to solve the problem below:
What is the (delta)Srxn of the following unbalanced reaction?
N2(g) +
O2(g) →
NO2(g)
do not round
what is the name of the chemical used for bleach in sugar industries
Answer: I think Sulfur dioxide
Explanation: sulfur dioxide is highly known as a bleaching agent in chemical factories during chemical processes and production
I am not to sure about bleaching in the SUGAR FACTORIES but if u need more explanation about sulfur dioxide in bleaching feel free to COMMENT!!!
Type of reaction in NaOH + KNO3 → NaNO3 + KOH
Answer:
It is a combustion reaction
Explanation:
WILL GIVE BRAINLIEST!!!
What is the mass of NaCl required to make 160 grams of a 32% solution of NaCl in water?
Answer:
19.20 g. Explanation: ∵ mass % = [mass of solute/mass of solution] x 100
GUYS PLEASE HELP ME
giving brainliest
2
Hope this helps :)
...............................
____ occurs when the vapor pressure of a liquid is equal to the external atmospheric pressure.
Answer:
c
Explanation:
boiling
Which statements correctly match the part of the microscope with its function? (choose all of the correct answers)
A
Ocular (Eyepiece) Lens: The knob that allows you to change the focus.
B
Objective Lenses: The lenses closest to the specimen.
C
Base: The lens at the top that you look through.
D
Arm: The very bottom of the microscope, used for support.
E
Stage: The flat platform where the slide is placed.
F
Stage clips: Metal clips that hold the slide in place.
Answer:
27
Explanation:
Which statement describes aluminum?
A. Aluminum is a conductor because the outer electrons of its atoms can move freely.
B. Aluminum is an insulator because the outer electrons of its atoms can move freely.
C. Aluminum is a conductor because its atoms form polar covalent bonds.
D. Aluminum is an insulator because its atoms do not have any valence electrons.
Answer: A. Aluminum is a conductor because the outer electrons of its atoms can move freely.
Explanation: Quizzed
The statement which best describes Aluminium is Option A , Aluminum is a conductor because the outer electrons of its atoms can move freely.
What is a Metal ?A substance with high electrical conductivity, luster, and malleability, which readily loses electrons to form positive ions (cations).
Metals conduct electricity because they have “free electrons.”
Unlike most other forms of matter, metallic bonding is unique because the electrons are not bound to a particular atom.
This allows the delocalized electrons to flow in response to a potential difference.
Aluminium is a metal and so a conductor.
Therefore , the statement which best describes Aluminium is Option A , Aluminum is a conductor because the outer electrons of its atoms can move freely.
To know more about Metals
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A container is filled completely with 197g of ethyl alcohol (density 0.790g/cm3). What is the volume of the container?
Answer:
The volume of the container is 249.367 cm³
Explanation:
Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space. In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance. Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
[tex]density=\frac{mass}{volume}[/tex]
From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.
Density, according to the International System of Units, is usually expressed in kilogram per cubic meter (kg/m³) or gram per cubic centimeter (g/cm³).
In this case:
density= 0.790 g/cm³mass= 197 gvolume= ?Replacing:
[tex]0.790 \frac{g}{cm^{3} } =\frac{197 g}{volume}[/tex]
Solving:
[tex]volume=\frac{197 g}{0.790 \frac{g}{cm^{3} } }[/tex]
volume= 249.367 cm³
The volume of the container is 249.367 cm³
Which choices are uses of electrical energy?
Choose all that apply.
A. creates useful gases
B. supplies energy for heat
C. provides power to lights
D. creates a magnetic force
Answer:
option A,B and C.
are the options I chose.
The electrical devices include those that are needed to power appliances and those that are used in daily life. In order to make things operational, they need power or energy.
Electrical energy is taken from the movement of electronically charged particles. These when collide produce energy that can be used for heating, lighting, etc.Hence the option C is correct.
Learn more about the choices are uses of electrical energy.
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A beach ball has a volume of 2.5 L of gas while at a temperature of 500 K. If the volume decreases to 2 L, what is the new temperature?
Answer:
250k
I Really This Helps A Little Bit.
A farmer wants to build a pond for her cows. What step must she take in order to build the pond?
A. Dig into the zone of aeration.
B. Place a permeable material on the ground.
C. Keep the soil moist.
D. Place an impermeable material on the ground.
Answer:
Option A:
Dig into the zone of aeration
Explanation:
Within the lithosphere of the earth's surface, the zone of aeration is the zone directly above the water table, with a lot of pore spaces within the rocks. These pore spaces contain air and water, which can be used to water the cows.
Once the zone of aeration has been dug into, the farmer can tap into the underground reserve of water, which is stored within the pores of rocks. This water can now sip into the hole that was dug up by the farmer, forming a pond for the cows.
Isaiah rolls a tennis ball along the ground. Which of the following best explains what will happen if forces act on the ball?
Answer:
what are the following
Explanation:
what are the options?
Answer:
the ball will stop moving
Which of the following is not an example of a chemical change?
A. rusting iron B. an apple ripening C. cutting paper D. a piece of wood burning
Answer:
cutting paper is not an example of chemical change.
Explanation:
cutting paper is physical change, its physical properties (size, shape ) change but chemical composition remain same.
The cutting paper is not a example of chemical change of a chemical reaction.
What is chemical reaction?The kind of reaction in which one kind of element get converted into another kind of elements or molecule is referred as chemical reaction.
What is chemical changes?
Chemical changes take place when a material combines with the other to generate a new substance, a process known as chemical synthesis, or when a molecule decomposes into more than one separate chemicals, a process known as chemical decomposition. These processes are known as chemical reactions, and they are generally irreversible unless they are followed by more chemical reactions.
Cutting paper is just a physical change not chemical change since the paper's characteristics did not change; only the shape, which would be a physical attribute, changed. The term "chemical change" refers to a change in a substance's chemical properties. Burning of paper, for example, or rusting of iron.
Therefore, cutting paper is not a example of chemical change.
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Which solution is more concentrated show work and EXPLAIN your reasoning
Solution A
2 L of water
135.75 g of MgO
or
Solution B
2 L of water
119.6 g of CaCl2
Answer:
Solution A
Explanation:
Solution A
1 mole of MgO = 24 + 16 = 40 g
? moles of MgO = 135.75g
[tex]\frac{135.75}{75}[/tex] = 1.81 moles
1.81 moles of MgO is in 2 liters of water
? moles of MgO is in 1 liter of water
[tex]\frac{1.584}{2}[/tex] = 0.905moles/liter or 0.905M
Solution B
1 mole of CaCl₂ = 40 + 35.5 = 75.5 g
? moles of CaCl₂ = 119.6g
[tex]\frac{119.6}{75.5}[/tex] = 1.584moles
1.584 moles of MgO is in 2 liters of water
? moles of MgO is in 1 liter of water
[tex]\frac{1.584}{2}[/tex]= 0.792moles/liter or 0.792M