Answer:
(1) silicon, oxygen, and one or more metal elements
Explanation:
The earth's Crust is mainly composed of
Oxygen, Silicon, Aluminum, Iron, Calcium, Potassium, Sodium and Magnesium. 90% of the earth's Crust is composed of Silicates.
The earths Mantle is almost completely Silicate, oxygen and magnesium.
What is the molecular formula of the compound with a molecular weight of 112 g/mol and percent composition: 85.6% C and 14.4% H?
Select one:
a. C2H4
b. CH2
c. C4H8
d. C8H16
Answer:
Molecular formula = C₈H₁₆
Explanation:
Given data:
Percentage of hydrogen = 14.4%
Percentage of carbon = 85.6%
Molecular formula = ?
Molecular weight = 112 g/mol
Solution:
Number of gram atoms of H = 14.4/ 1.01 = 14.26
Number of gram atoms of C = 85.6/ 12 = 7.13
Atomic ratio:
C : H
7.13/7.13 : 14.26/7.13
1 : 2
C : H = 1 : 2
Empirical formula is CH₂
Molecular formula:
Molecular formula = n (empirical formula)
n = molar mass of compound / empirical formula mass
n = 112 / 14
n = 8
Molecular formula = n (empirical formula)
Molecular formula = 8 (CH₂)
Molecular formula = C₈H₁₆
What is the work done on an object moved a distance of 63 m with a force of 8.5 x 103
Newtons?
Answer:
5.355 × 10³ JoulesExplanation:
I just had this question on my test
The Guarantee Clause gives the legislature the power to make all necessary and proper laws.
Answer:
True
Explanation:
Answer:
True ;)
Explanation:
what is the value of log1.004?
Answer:
−0.60205999
Explanation:
What dose sediment consisting
Answer:
sediments consist of rocks and minerals, as well as the remains of plants and animals
Explanation:
What is the difference between chlorine -35 and chlorine -37?
Answer:
Free chlorine involves the amount of chlorine that's able to sanitize contaminants, while combined chlorine refers to chlorine that has combined directly with the contaminants. Total chlorine is basically the sum of free chlorine and combined chlorine.
Explanation:
chlorine -35 being chlorine
chlorine -37 being free chlorine
how a neutral object is different from a negatively charged object.
Answer:
Charged objects have an imbalance of charge - either more negative electrons than positive protons or vice versa. And neutral objects have a balance of charge - equal numbers of protons and electrons. ... Their presence (or absence) will have no direct bearing upon whether an object is charged or uncharged.
URGENT!!!! How many molecules of carbon dioxide are produced when a molecule of C7H15 combusts?
Answer:
7 seven
Explanation:
because when C7H15 is heated 7molecules of atoms are displaced
i need to know what occupied vs full means for chemistry
The transfer of energy in the form of invisible waves is
Answer:
Radiation
Explanation:
An 80 gram sample of a radioisotopes decayed to 40 grams in 3 days how many grams of the original sample would remain after 9 days
Answer: 10 grams
Explanation: Original sample is 80 gram and every three days half of its composition decays so 80 down to 40 in the first 3 days, 20 in the next three days, and 10 in the last three days
Which of the following is NOT n intensive property?
A. Magnetism
B. Boiling point
C. Thermal conductivity
D. Volume
How to balance:
_N2+__O2+__H2O-> _HNO3
Answer:
2N2 + 5O2 + 2H2O → 4HNO3
Explanation:
Dinitrogen - N2
N₂ Nitrogen Gas Nitrogen Diazyne
Molar Mass of N2 Bond Polarity of N2
Dioxygen - O2
O₂ Oxygen Molecular Oxygen Diatomic Oxygen Triplet Oxygen Oxygen Gas Liquid Oxygen LOx
Molar Mass of O2 Bond Polarity of O2
Water - H2O
Dihydrogen Monoxide Dihydridooxygen [OH2] HOH Hydrogen Hydroxide Dihydrogen Oxide Oxidane Hydrogen Oxide
Molar Mass of H2O Oxidation State of H2O
Products
Nitric Acid - HNO3
Spirit Of Niter Fuming Nitric Acid Aqua Fortis Engravers Acid Hydrogen Nitrate HONO2 Peroxynitrous Acid [NO(OOH)]
Molar Mass of HNO3 Oxidation State of HNO3
Which of the following statements explains the difference between a lease and a loan?
a. At the end of a loan the car belongs to you, but at the end of a lease, the car still belongs to the
lease company
b. At the end of a loan, the car still belongs to the lease company, but at the end of a lease the car
belongs to you.
c. A loan requires a large down payment at the beginning while a lease does not.
d. A lease requires a large down payment at the beginning while a loan does not.
Please select the best answer from the choices provided
Answer:
letter A is the answer
Explanation:
At the end of a loan the car belongs to you, but at the end of a lease, the car still belongs to the lease company.
HELP! ASAP
WILL MARK DOWN BRAINLIEST
Answer:
SO 4. IS he has small dicke
:D happy to help
Explanation:
What is the lon # for Beryllium (Be)?
Answer:
Number: 4
Charge: +2
Element: Beryllium
I hope this helps!! :)
As ice cream melts, the particles in it will _____ which causes it to ____ thermal energy.
a. Speed up, lose
b. Speed up, gain
c. Slow down, lose
d. Slow down gain
There isn't a subject for science so I put it as chemistry
Answer:
b. speed up, gain
Explanation:
Explain the electroplating process of an iron key with silver. the materials provided for electroplating is AgNO3 solution, silver rod and iron key.
Answer:
See explanation
Explanation:
The process of electroplating an iron key with silver involves electrolysis.
The anode is a silver rod, the electrolyte is AgNO3 solution while the cathode is the iron key. A battery is connected to provide energy to drive the non-spontaneous electrochemical reaction.
Electrons flow from the anode to the cathode. Silver ions from the silver rod replenishes the silver that is deposited on the iron key in order to continue the electrolytic process.
The silver anode is therefore depleted in mass while the iron key increases in mass.
What is the value for AG at 100 Kif AH = 27 kJ/mol and AS = 0.09 kJ/(mol-K)?
A. AG = 2700 kJ/mol
B. AG = -36 kJ/mol
C. AG = 0 kJ/mol
D. AG = 18 kJ/mol
Answer:
ΔG = 18KJ/mol
Explanation:
Given data:
ΔS = 0.09 Kj/mol.K
ΔH = 27 KJ/mol
Temperature = 100 K
ΔG = ?
Solution:
Formula:
ΔG = ΔH - TΔS
ΔS = entropy
ΔH = enthalpy
by putting values,
ΔG = 27 KJ/mol - 100K(0.09 Kj/mol.K)
ΔG = 27 KJ/mol - 9 KJ/mol
ΔG = 18KJ/mol
Answer:
ΔG = 18kJ/mol
Explanation:
took the quiz on ap ex and it was correct
how many cm is 0.375 ft.
Answer:
11.43 cm
Explanation:
An object is placed at 0 on a number line. It moves 3 units to the right, then 4 units to the left, and then 6 units to
the right. What is the displacement of the object?
1
5
7
13
Answer:
the answer will be five
Explanation:
i got this question on a test and i got it right
Explain the role of family and friends in socialisation.
Explanation:
Family is usually considered to be the most important agent of socialization. They not only teach us how to care for ourselves, but also give us our first system of values, norms, and beliefs. ... Another agent of socialization that relates to school is our peer group.
How many moles of NaOH must be dissolved in 1.00 L of water to make NaOH (aq) with a pH of 12.2?
Answer:
1.58 102 mol
Explanation:
I just looked it up on Quizlet.
1.58 102 moles of NaOH must be dissolved in 1.00 L of water to make NaOH (aq) with a pH of 12.2.
How many moles are present in NaOH?One mole of any substance weighs about the same as the molecular mass of that substance. Hence, the number of moles of sodium hydroxide contained in 160 g of it is 4 moles.
How do I calculate moles?Number Of Moles Formula
1 The formula for the number of moles formula is expressed as.
Given.
2 The number of moles formula is.
3 The number of moles = Mass of substance / Mass of one mole.
4 Number of moles = 95 / 86.94.
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NEEED HELP ASAP
Metals are ductileYou can pull or draw them into a wire. The ductility of a material is a / a *
A) chemical property
B) extensive property C)intensive property
D) reactive property
Is the modern periodic table arranged based on atomic mass?
HELPP ILL GIVE BRAINLIEST
Answer: its b
Explanation:
Methane(CH4) is a gas at room temperature, Methanol (CH3OH) is a liquid. Explain why using types of intermolecular forces present.
Explanation:
Methane is a gas at room temperature but methanol is a liquid because in methane there's London dispersion intermolecular force but in methanol there's H-bond and London dispersion force. H-bond is more stronger than London dispersion force. So, it increases the boiling point of methanol that's why methane is gas at room temperature due to weak attraction of London dispersion force and methanol is liquid.
Methanol has a higher boiling point than methane due to stronger intermolecular forces (IMFs), or attraction between individual molecules. This makes its molecules more difficult to separate, requiring more energy and resulting in a higher boiling point.
What are intermolecular forces?An intermolecular force is a force that mediates the interaction of molecules, including electromagnetic forces of attraction or repulsion that act between atoms and other types of neighboring particles, such as atoms or ions.
Intermolecular forces are classified into five types namely,
Ion-dipole forces.Ion-induced dipole forces.Dipole-dipole forces.Dipole-induced dipole forces.Induced dipole forces.Between ions and polar dipole molecules, ion-dipole forces exist.
Since of stronger intermolecular forces (IMFs), or attraction between individual molecules, methanol has a higher boiling point than methane.
This makes it more difficult to separate its molecules, requiring more energy and resulting in a higher boiling point.
Thus, this is the reason of using types of intermolecular forces present.
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4. (10 Points) Write a single replacement reaction where one of the reactants is
ammonium nitrate.
Include the states of matter for each of the reactants and products.
Answer:
For each balanced reaction, indicate the total number of atoms in the table below. Reaction. Total Number of Atoms. Reactant Side 1 Product Side. (Left).
Explanation:
An object is moving across a surface, but it does not gain or lose speed. Which best describes the object’s force?
Answer:
Explanation:
the vector sum of all such forces which equals zero for an object at rest. CASE 1: Considering a basketball of weight 1kg, if it has been kept stationary on the ground, there are two forces acting on it. These are it's weight (gravity) and equal and opposite force from the ground (normal reaction).
Answer:
The net force is zero. :)
Explanation:
Find three examples of synthetic compounds that contain aromatic rings. Indicate their source or importance
Answer:
Viagra, Cialis, and Levitra each contain aromatic rings.
They are all ED pills and come from drug manufacturing laboratories (you said "synthetic").
Explanation:
What is the molecule that formed between B and F?
Answer:
Hydrogen bond strengths range from 4 kJ to 50 kJ per mole of hydrogen bonds. In molecules containing N-H, O-H or F-H bonds, the large difference in electronegativity between the H atom and the N, O or F atom leads to a highly polar covalent bond (i.e., a bond dipole).
Explanation: