Cardenolides, with the chemical formula CH₁₈C₂₀H₁₅CHCO₂ have (D) 23 carbon atoms, 34 hydrogen atoms, and 2 oxygen atoms.
Milkweed contains a poison known as cardenolides. The chemical formula for cardenolides CH₁₈C₂₀H₁₅CHCO₂.
The subscripts in the formula represent the atomicities, that is the number of atoms of each element in each part of the formula.
We can calculate the total number of atoms of each element by adding its atomicities.
Carbon atoms[tex]C = 1 + 20 + 1 + 1 = 23[/tex]
Hydrogen atoms[tex]H = 18 + 15 + 1 = 34[/tex]
Oxygen atoms[tex]O = 2[/tex]
Cardenolides, with the chemical formula CH₁₈C₂₀H₁₅CHCO₂ have (D) 23 carbon atoms, 34 hydrogen atoms, and 2 oxygen atoms
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How does a cation attract an anion?
An ionic bond is formed through the transfer of one or more valence electrons, typically from a metal to a non-metal, which produces a cation and an anion that are bound together by an attractive electrostatic force.
The atoms of platinum and silver are identical (true or false)
Answer:
I think it's false but not sure
The atoms of platinum and silver are identical. This statement is false.
What is platinum ?Platinum is a chemical element which is represented by the symbol Pt. Its atomic number is 78. It is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal.
The elements silver and platinum have the same properties in terms of ductility, malleability, and conductivity of heat and electricity.Platinum is more ductile than gold, silver or copper.
Both metals silver and platinum appear silver. They have gray undertones, unlike white gold which has a warmer, yellow undertone, instead platinum is much brighter and shinier and silver is a duller, gray appearance.
Thus, The atoms of platinum and silver are identical. This statement is false.
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PLEASE HURRY Potential energy is described as
Question 1 options:
Stored energy
Friction
Decreasing energy
Movement
Answer:
Potential energy is the stored energy of position possessed by an object.
Potential energy is described as stored energy. Depending on the relative positions of various system components, stored energy. When a spring is squeezed or extended, its potential energy increases.
What is potential energy ?Potential energy is the power that an item may store due to its position in relation to other things, internal tensions, electric charge, or other circumstances.
A boulder perched precariously atop a cliff. The rock will be moving if it falls, converting the potential energy to kinetic energy. a longbow's stretched-elastic string.
Potential energy is the energy that is stored in any item or system as a result of its location or component arrangement. The environment outside the object or system, such as air or height, has no impact on it. Conversely, kinetic energy is the force that propels the particles of an item or a system into motion.
Since light has no mass and is an example of electromagnetic radiation, it possesses neither kinetic nor potential energy. The remaining forms exhibit both kinetic and potential energy characteristics.
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What are atoms made of.
Answer: Atoms are made of dust because God made us with dust.
Explanation:
9. Circle the element in each pair that has the greater electronegativity.
→ Ca or Ge
→ Li or o
→ CI or s
→ Br or As
Answer:
1. Ga
2. O
3. Cl
4. Br
aldosterone plays a primary role in adjustment of ____________ excretion.
an empty aerosol can at 25°c still contains gas at 1.00 atmosphere pressure. if an empty can is thrown into a 475°c fire, what is the final pressure in the heated can?
The final pressure in the heated can is 2.51 atm
From the question given above, the following data were obtained:
Initial temperature (T₁) = 25 °C = 25 + 273 = 298 K
Initial pressure (P₁) = 1 atm
Final temperature (T₂) = 475 °C = 475 + 273 = 748 K
Final pressure (P₂) =?The final pressure can be obtained as illustrated below:
[tex] \frac{P_1}{T_1} = \frac{P_2}{T_2} \\ \\ \frac{1}{298} = \frac{P_2}{748} \\ \\ cross \: multiply \\ \\ 298 \times P_2 = 1 \times 748 \\ \\ divide \: both \: side \: by \: 298 \\ \\ P_2 = \frac{748}{298} \\ \\ P_2 = 2.51 \: atm[/tex]
Therefore, the final pressure in the heated can is 2.51 atm
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An endothermic process may be spontaneous if ______. Multiple choice question. the endothermic process results in a precipitation of a crystalline solid from a liquid solution the endothermic process converts a gas reactant into a liquid or solid product the product particles have more freedom of motion than the reactant particles the product particles have less freedom of motion than the reactant particles
An endothermic process may be spontaneous if: C. the product particles have more freedom of motion than the reactant particles.
An endothermic reaction can be defined as a type of chemical reaction in which heat energy is absorbed from the environment.
Generally, heat energy is absorbed in a chemical reaction when the energy of the products is greater (more) than the energy of the reactants and this is referred to as an endothermic reaction.
Similarly, an endothermic process may be spontaneous when the product particles have more freedom of motion than the reactant particles.
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Describe how calcium and fluorine bond together to form calcium fluoride
Answer: A transfer of electrons occurs when fluorine and calcium react to form an ionic compound. This is because calcium is in group two and so forms ions with a two positive charge. ... A pairs of shared electrons makes one covalent bond. The compound formed is known as a molecule***
IF U HAAD THEE RIGHHT ANSWERRR PLZZZ
- Which of the following is NOT part of Dalton's atomic theory?
A) Atoms are the smallest, indivisible particles in nature.
B) Chemical reactions are simple rearrangements of atoms.
C) Atoms follow the law of multiple proportions.
D) Each atom of an element is identical to every other atom of that element. b
Answer:A
Explanation: I’m pretty sure
which dilute acid is used to make sodium carbonate salt
Answer:
Sulfuric acid.
The sulfuric acid can react with common salt to produce Na2SO4, and after that you add CaCO3 and carbon to get Na2CO3
which of the following molecules can form hydrogen bonds with others like it?
Answer:
nitrogen, oxygen and fluorine
Question 4 of 5
Which characteristic describes the living things in the domain Eukarya?
A. They can be made up of prokaryotic cells.
B. They are made up of eukaryotic cells.
C. They are all multicellular organisms.
D. They are made up of cells that lack a nucleus.
SUBMIT
Answer:
he presence of nucleus which contains genetic material and is enclosed by a nuclear membrane sets them apart from prokaryotic cells. All complex organisms are eukaryotic and they reproduce by mitosis or meiosis. Eukaryotic cells are typically much larger than those of prokaryotes.
Explanation:
Which statement best describes the effect of radioactive decay on a nucleus?.
When radioactive decay occurs, the original nucleus splits into daughter nuclei and the resulting nucleus is more stable than the original nucleus. The nucleus can be of a different element than the original.
Unstable nuclei often undergo radioactive decay. In a radioactive decay, the unstable nucleus is broken up into other nuclei. Usually, the nuclei formed during radioactive decay are smaller in mass compared to the original nucleus.
Also, the resulting nucleus is more stable than the original nucleus. The nucleus can be of a different element than the original.
Answer:
radiation travels from its source in the form of energy waves or energized particles
Explanation:
radiation is energy
T’Keyah puts salt in ice water and then in boiling water to see which will dissolve faster.Which dissolving rate factor is she testing in these tests?
Answer:
temperature
Explanation:
its in the book
Answer: agitation
Explanation:
what is an environmental result from burning fossil fuels?
Answer:
The burning of fossil fuels contributes to the addition of greenhouse gases to the atmosphere. These gases trap thermal energy in the Earth's atmosphere.
Please hurry and help 20 and points and brainelest
please help me with the attachment down bellow its about metal nonmetal and metalloids
Answer:-
a. Non metals
b. Metals
c. Metals
d. Nonmetal
e. Metalloid
f. Metalloid
g. Metal
h. Nonmetal
i. Metal
j. Metal
k. Nonmetal
l. Nonmetal
Hope this helps you!
In which container are the particles of water moving fastest? In which container are the particles moving slowest
Answer:
Particles move faster the farther they are apart, so the container with the most spread out particles.
Which list includes only bulk properties of matter?
-boiling point, kinetic energy, surface tension
-kinetic energy, the strength of electrical forces, vapour pressure
-boiling point, the strength of electrical forces, vapour pressure
-boiling point, surface tension, vapour pressure
Boiling point, surface tension and vapour pressure is the list that includes only bulk properties of matter.
Bulk matter refers to those materials that contains large numbers of atoms, molecules, or ions. Its can be present into all states of matter that may be solid, liquid or gas.
Boiling is a bulk process and occurs throughout the liquid as well as surface tension and vapour pressure is also bulk properties of matter so we can conclude that boiling point, surface tension and vapour pressure is the list that includes only bulk properties of matter.
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Define the mass number of an atom
Answer:
The mass number of an atom, which is also called the atomic mass number, is the total number of protons and neutrons in an atom,
Explanation:
Hope this is helpful.
Dividing the distance a wave travels by the time it takes to travel that distance gives you the wave’s speed.
True
False
Answer:
true
Explanation:
hope this helps
which type of spectra would be produced by a hydrogen lamp?
Answer: Emission spectra
The Emission spectrum can be separated into three types:
Line emission spectrum Continuous emission spectra.Band emission spectrumWhat is a Hydrogen lamp?
A gas of hydrogen atoms will create an absorption line spectrum if it is between you (telescope+spectrograph) and a continuum light source, and also an emission line spectrum if considered from a distinguishable angle.
When The emission spectrum of atomic hydrogen has been divided into several spectral sequences, with wavelengths given by the Rydberg formula.
These experimental spectral lines are due to the electron-making transitions between two energy positions in an atom.
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A sample of gold has a mass of 100 grams and a volume of 5cm^3, calculate the density by dividing the mass by volume
Answer:
20cm^2
Explanation:
Here, Density= Mass/ Volume
=100/5
= 20 cm^2
If anhydrous mgso4 is the desired product, what is the atom economy of this reaction?.
This problem is referring to an anhydrous salt that is derive from a hydrated Epson salt (magnesium sulfate hydrate) and the atom economy is required. However, not enough information is provided, yet we can use the attached file as a reference to provide a methodology of calculation.
To begin with, we need to calculate the [tex]x[/tex] which refers to the degree of hydration of the salt, so that we use the mass before and after heating the sample to figure out the grams and subsequently moles of water that are in there:
[tex]m_w=3.648g-1.782g=1.866g\\\\n_w=0.103molH_2O[/tex]
Next, since 1.782g corresponds to the anhydrous salt, we calculate the moles in such a amount:
[tex]1.782gMgSO_4*\frac{1molMgSO_4}{120.4gMgSO_4}=0.0148mol[/tex]
Then, we divide the moles of water by those of the anhydrous salt to calculte [tex]x[/tex]:
[tex]x=\frac{0.103mol}{0.0148mol} =6.96=7[/tex]
This means the formula of the hydrate is:
[tex]MgSO_4\ 7H_2O[/tex]
Finally, for the atom economy we just divide the molar mass of the anhydrous salt by that of the hydrate:
[tex]A.E=\frac{120.4g/mol}{246.47g/mol} *100\%\\\\A.E=48.8\%[/tex]
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https://brainly.com/question/20796771Which sentence from the article BEST describes HOW fireworks produce colors in the sky?
(A)
It needs an oxidizer, a fuel and a chemical mixture to produce the color.
(B)
Over the years, scientists have staged various chemical reactions to produce fireworks of different
colors.
(C)
The color of that light depends on what chemical elements are present.
(D)
When the casing explodes, pellets containing the chemical color mixtures fly out.
Fireworks need an oxidizer, fuel, and a chemical mixture to produce the colour in the sky. Therefore, option (A) is correct.
How do colours come from firecrackers?The chemicals which are used in crackers are the main reason for the colours in the sky. The colours in the fireworks come from different compounds which are the binder and the colourant. The colourant chemicals provide the colours in the firework while the binder is the agent that binds the fuel and is responsible to burn up the colourant in the firework.
The colourants in the firecrackers can be generated with the use of various metallic salts. These salts can be defined as iconic compounds which possess an anion or an acid and a cation or a base. The metal salts are responsible for generating intense colours when they are burned.
For example, if use calcium salts in the firework will produce an orange colour, and copper salts will produce a bright blue colour.
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Melting point of 20 g of ice
Answer:
6680 J
Explanation:
does apple pie need to be stored in the refrigerator?
Answer:
yes/no
Explanation:
I prefere it refrigerated because it lasts longer in my opinion. but some people keep it out
Answer:
yes.
Explanation:
It does unless you want warm soggy pie.
Choose all the answers that apply. According to Newton's second law of motion: objects at rest will remain at rest unless acted upon by an outside force the greater the magnitude of force, the faster the acceleration mass has an inverse relationship with acceleration every action has an equal and opposite reaction acceleration is caused by unbalanced forces
Answer: The answers aplicable would be
1) The greater magnitude of force, the faster the acceleration.
2) Acceleration is caused by unbalanced forces.
If an iron nail was placed in the copper sulfate solution, would you see a
change?
Explain your answer.
Answer:
Iron displaces copper ions
Explanation:
which means that iron in more reactive than copper.
(Fe2+) and cupric ion (Cu2 +) is converted into metallic copper. Fe (s) + Cu2 + (aq) —→ Fe2+ (aq) + Cu (s).