Answer:
Computer hard drives use magnetism to store the data on a rotating disk. More complex applications include: televisions, radios, microwave ovens, telephone systems, and computers. An industrial application of magnetic force is an electromagnetic crane that is used for lifting metal objects.
Explanation:
Computer hard drives use magnetism to store the data on a rotating disk. More complex applications include: televisions, radios, microwave ovens, telephone systems, and computers. An industrial application of magnetic force is an electromagnetic crane that is used for lifting metal objects.
In a chemical reaction, the number of moles of the reactants
A.
should always be equal to the number of moles of the products.
B.
depends on the amount of product that is formed.
C.
should never be equal to the number of moles of the products.
D.
may or may not be equal to the number of moles of the products.
Answer:
may or may not be equal to the number of moles of the products.
Explanation:
A chemical reaction involves the interaction between reactants to yield products. The number of moles of reactants and products in the system depends on the stoichiometry of the reaction.
The balanced reaction equation shows us the number of moles of reactants and products involved in the reaction.
Hence, in the balanced chemical reaction equation; the number of moles of reactants may or may not be equal to the number of moles of the products.
Write the net ionic equation. Don't worry about identifying the state of matter. 2 NH4Cl (aq) + 1 Mg(OH)=2NH3 (g) + 2H2O (l) + 1 MgCl2 (aq)
Answer:
2NH4^+(aq) + 2OH^-(aq) ----->2NH3(g) + 2H2O(l)
Explanation:
Molecular balanced reaction equation;
2NH4Cl (aq) + Mg(OH)2---->2NH3 (g) + 2H2O (l) + MgCl2 (aq)
Complete ionic reaction equation;
2NH4^+(aq) + 2Cl^-(aq) + Mg^2+(aq) + 2OH^-(aq) ----->2NH3(g) + 2H2O(l) + Mg^2+(aq) + 2Cl^-(aq)
Net Ionic reaction equation;
2NH4^+(aq) + 2OH^-(aq) ----->2NH3(g) + 2H2O(l)
The correct formula for finding the relative velocity of an object is:
Vac= vah-vыс
Valc = ab + b c
Vad = ab + b c
b c = ab + b c
Answer:
va/c = v a/b + v b/c
Explanation:
This is the correct formula for relative velocity
In which situation would hydrogen bonding be present?
Answer:
Water ?
Need more info.
Water is [tex]H_{2}[/tex]O
Explanation:
Answer:
Hydrogen bonding occurs when a protonic H is bonded to F, O or N and there must be a lone pair of electron in the F, O or N atom.
Sodium combines with water to produce sodium hydroxide and hydrogen gas. Which word equation represents this violent reaction? O sodium hydroxide + water → Sodium + hydrogen O sodium + water → sodium hydroxide + hydrogen O sodium + hydrogen → sodium hydroxide + water O sodium + sodium hydroxide → Water + hydrogen
The word equation that represents the violent reaction between sodium and water is as follows: sodium + water → sodium hydroxide + hydrogen.
What is a chemical reaction?A chemical reaction is the process, typically involving the breaking or making of interatomic bonds, in which one or more substances are changed into others.
According to this question, sodium (Na) and water (H2O) are involved in a chemical reaction to produce sodium hydroxide (NaOH) and hydrogen gas (H2).
Therefore, the word equation that represents the violent reaction between sodium and water is as follows: sodium + water → sodium hydroxide + hydrogen
Learn more about chemical reaction at: https://brainly.com/question/22817140
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17. A sample of oxygen gas has volume 150.0 mL, at 0.947 atm, what will be the volume of the gas at 750.12 mm of Hg if temperature remain constant.
Answer:
143.9 mL is the new volume for the gas.
Explanation:
Let's apply one of the gases law to solve this problem:
Boyle's law states that the product of pressure and volume remains constant when the T° is not modified.
P₁ . V₁ = P₂ . V₂
Be careful because we have T° in mmHg. We need to convert to atm:
750.12 mmHg . 1 atm / 760 mmHg = 0.987 atm
We replace data:
150 mL . 0.947 atm = 0.987 atm . V₂
V₂ = (150 mL . 0.947 atm) / 0.987 atm
V₂ = 143.9 mL
This term P . V comes from the Ideal Gases Law
P . V = n . R . T
when monomers are joined together, what do they form?
The monomers combine with each other via covalent bonds to form larger molecules known as polymers. In doing so, monomers release water molecules as byproducts.
How do hydrogels retain water?
Answer:
The combination of the polymer opening up and the water molecules sticking to it make a solution of the hydrogel get thicker and more viscous (sticky). Disposable nappies make use of the ability of hydrogels to take up and retain water, even under pressure.
Explanation:
N is another unit for mass True or False
How many grams of ammonia (NH3) can be produced by the synthesis of excess hydrogen gas (H2) and 253.8 grams of nitrogen gas (N2) in a synthesis reaction?
Answer:
308.2 g of NH₃.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
3H₂ + N₂ —> 2NH₃
Next, we shall determine the mass of N₂ that reacted and the mass of NH₃ produced from the balanced equation. This can be obtained as follow:
Molar mass of N₂ = 2 × 14 = 28 g/mol
Mass of N₂ from the balanced equation = 1 × 28 = 28 g
Molar mass of NH₃ = 14 + (3×1)
= 14 + 3 = 17 g/mol
Mass of NH₃ from the balanced equation = 2 × 17 = 34 g
Summary:
From the balanced equation above,
28 g of N₂ reacted to produce 34 g of NH₃.
Finally, we shall determine the mass of NH₃ produced by the reaction of 253.8 g of N₂. This can be obtained as illustrated below:
From the balanced equation above,
28 g of N₂ reacted to produce 34 g of NH₃.
Therefore, 253.8 g of N₂ will react to produce = (253.8 × 34)/28 = 308.2 g of NH₃.
Thus, 308.2 g of NH₃ were obtained from the reaction.
i need help answering this question on my homework, could anyone help?
What is the number of Co2 in a 220 gram
1. Ecosystems are composed of biotic and abiotic factors. Which of the following
represent only an abiotic factor in an ecosystem that could have an effect on
the ecosystem?
a. rivers with more dams
b. wood being taken for manufacturing
c. waste not being used by fungi
d. decomposers only taking nutrients from plants
Answer:
wood being taken for manufacturing
What is the percent composition of phosphorus in the compound P3CI8
Answer:
24.68%
Explanation:
Molar mass of phosphorous / molar mass of P3Cl8
= 3 x 30.97 / (3 x 30.97) + (8 x 35.45)
= 92.91/376.51 x 100
= 24.676%
=24.68% (2dp)
What is most likely to happen when two fluorine (F) atoms bond?
A: Electrons will be equally attracted to. both atoms.
B: One atom will attract electrons more strongly
than the other.
help asap please
please explain what a ecosystem is.
Explanation:
An ecosystem includes the environment, living and non-living things and how they interact with each other.
For example, in a Reef ecosystem there
are marine plants and animals that depend on each other and their surrounding to survive.
Does a reaction involving an acid and a base have to take place in a water environment? Justify your answer.
Answer:
Yes, because the water solvent is better
Explanation:
Hope this helps
For an ideal gas, evaluate the volume occupied by 0.3 mole of gas.
Answer:
V=0.3×22.4=6.72 liters hope this helps
Fe2O3 (s) + CO (g) -> Fe(s) + CO2 (g) (unbalanced)
1.Calculate the number of grams of CO that can react with 0.150kg of Fe2O3
2. Calculate the number of grams of Fe and the number of grams of CO2 formed
when 0.150 kg of Fe2O3 reacts
Answer:
1. 78.9g of CO
2. 104.9g Fe and 124.0g CO2
Explanation:
Based on the balanced reaction:
Fe2O3 (s) + 3CO (g) -> 2Fe(s) + 3CO2 (g)
1 mole of Fe2O3 reacts with 3 moles of CO to produce 2 moles of Fe and 3 of CO2
1. The moles of 0.150kg = 150g of Fe2O3 -Molar mass: are:
150g * (1mol / 159.69g) = 0.9393 moles Fe2O3
Moles CO:
0.9393 moles Fe2O3 * (3mol CO / 1mol Fe2O3) = 2.818 moles CO
Mass CO -Molar mass: 28.01g/mol-:
2.818 moles CO * (28.01g/mol) = 78.9g of CO
2. The moles of Fe produced are:
0.9393 moles Fe2O3 * (2mol Fe / 1mol Fe2O3) = 1.8786 moles Fe
Mass Fe -Molar mass: 55.845g/mol-:
1.8786 moles Fe * (55.845g/mol) = 104.9g Fe
The moles of CO2 produced are:
0.9393 moles Fe2O3 * (3mol CO2 / 1mol Fe2O3) = 2.818moles CO2
Mass CO2 -Molar mass: 44.01g/mol-:
2.818moles CO2 * (44.01g/mol) = 124.0g CO2
Use the earthquake distribution map and what you know about boundaries to answer the question
2HCl → H2 + Cl2
Is synthesis?
Answer:
It's decomposition
explanation:
The metal aluminum coils in an air conditioner conduct thermal energy from inside the house and release it outside the house. What can be said about the coils when they are accepting the heat inside the house?
Answer:
c
Explanation:
Answer:
B: They must be cooler than the air inside the house.
Explanation:
I got it right on edge!
The theoretical yield of NH3 is 945 grams. You conducted the experiment and only produced 598 grams.
Answer:
Given theoretical yield of NH3 is 945g.
The actual yield is 598g.
What is the %yield?
Explanation:
%yield of a chemical reaction can be calculated by using the formula:
[tex]%yield=\frac{actual yield}{theoretical yield} * 100[/tex][tex]\frac{actual yield}{theoretical yield} * 100[/tex]
Substitute the given values in this formula to get the %yield.
[tex]\frac{598g}{945g} * 100\\=63.3[/tex]
Hence, the %yield for the formation of ammonia is ---- 63.3.
How many Carbon Atoms are there on the PRODUCT SIDE
Answer: There are 6 carbon atoms on the product side.
Explanation:
The given reaction equation is as follows.
[tex]6CO_{2} + 6H_{2}O \rightarrow C_{6}H_{12}O_{6} + 6O_{2}[/tex]
Species present on the left side of an arrow in a chemical equation depicts the reactants.
Species present on the right side of an arrow in a chemical equation depicts the products.
Hence, products in the given reaction equation are [tex]C_{6}H_{12}O_{6}[/tex] and [tex]6O_{2}[/tex].
Therefore, there are 6 carbon atoms present on the product side.
Thus, we can conclude that there are 6 carbon atoms on the product side.
WILL GIVE BRAINLIEST - A solution has a [H3O+] of 1 × 10−3 M. What is the [OH−] of the solution?
11 M
14 M
1 × 10−14 M
1 × 10−11 M
Answer:
The answer is 1 x 10 - 11 M. :))
What is the oxidation state of each element in the compound CaSO4?
What volume will 106.476 g N, gas at STP occupy?
O 85.1808L
O 170.362L
O 7.60543L
0 3.80271L
Answer:
170.362 L
General Formulas and Concepts:
Atomic Structure
Reading a Periodic TableMolesGas Laws
STP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 KStoichiometry
Using Dimensional AnalysisExplanation:
Step 1: Define
Identify variables
[Given] 106.476 g N
[Solve] L N
Step 2: Identify Conversions
[STP] 1 mol = 22.4 L
[PT] Molar Mass of N: 14.01 g/mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 106.476 \ g \ N(\frac{1 \ mol \ N}{14.01 \ g \ N})(\frac{22.4 \ L \ N}{1 \ mol \ N})[/tex][DA] Divide/Multiply [Cancel out units]: [tex]\displaystyle 170.24 \ L \ N[/tex]1. Two hypothetical elements in the periodic table have different characteristics as shown in the following table.
ELEMENT, ELECTRONEGATIVITY, TYPE OF ION, ELECTRICAL CONDUCTIVITY, BRIGHTNESS
X Low Electro cation ion high conduc brightness yes
Y High Electro anion ion none conduc brightness no
According to the data in the table, answer the following questions.
a. If you were to carry out an experiment with these 2 hypothetical elements, write a hypothesis to differentiate them and write another hypothesis about how they would react with oxygen and water.
HYPOTHESIS 1:
HYPOTHESIS 2:
In four steps, design an experiment (write step 1, step 2, step 3 and step 4) to check and verify what types of links would form these elements X and Y if after a series of reactions these elements join in some type chemical bonding.
STEP 1
STEP 2
STEP 3
STEP 4
b. A series of reactions of elements X and Y are given below, complete these reactions bearing in mind that X has an oxidation number +2 and Y has an oxidation number +6.
I. X + O2 XO
II. Y + O2 YO3.
III. XO + H2O X(OH)2
IV. YO3 + H20 H2YO4.
V. X(OH)2 + H2YO4 A + H2O.
d. Considering the result (A) in reaction number 5, answer:
I. What type of chemical bond do you think A has?
II. What are its physical and chemical properties?
III. Design a four-step experiment so that you can identify the type of chemical bond that substance A obtained in reaction 5 has. The design must contain at least 2 variables to be measured and 2 hypotheses with these variables.
Answer:
gas and element and compound
Explanation:
because it's different and more power so the elements
3. What are the planets called that are mostly made of gas?
Explanation:
The gas planets are Jupiter, Saturn, Uranus and Neptune.
Answer:
A gas giant is a large planet composed mostly of gases, such as hydrogen and helium, with a relatively small rocky core. The gas giants of our solar system are Jupiter, Saturn, Uranus and Neptune. These four large planets, also called jovian planets after Jupiter, reside in the outer part of the solar system past the orbits of Mars and the asteroid belt. Jupiter and Saturn are substantially larger than Uranus and Neptune, and each pair of planets has a somewhat different composition.Although there are only four large planets in our solar system, astronomers have discovered thousands outside of it, particularly using NASA's Kepler Space Telescope. These exoplanets (as they are called) are being examined to learnmore about how our solar system came to be.Explanation:
hopeit helps...how many atoms of zirconium are in the molecule of zirconium sulfide
Answer:
1 atom of zirconium
Explanation:
Zirconium sulfide or zirconium disulphide can be written as ZrS2.
