Answer:
The independent variable influences change in the dependent variable whether the points on the scatterplot go up or down from left to right.
Explanation:
Which of the following is a consumer that can be found in the subalpine ecosystem of the Rocky Mountains?
pumas
juniper berries
turkey vultures
condors
Answer:
I am pretty sure it is condor because some condors live in the rocky mountains in all over America and Mexico.
Answer:turkey vultures
Explanation:
A 0.5505 g sample of impure Ca(OH)2 is dissolved in 50.00 mL of water. 20.00 mL of the resulting solution is then titrated with 0.1939 M HCl. What is the percent purity of the Ca(OH)2 if the titration requires 22.18 mL of acid? g
Based on the data provided, the percentage purity of Ca(OH)2 is 28%.
What is the mass of Ca(OH)2 that will be diluted by 22.18 mL of 0.1939 M HCl?The equation of the reaction is given below:
Ca(OH)2 + 2 HCl ----> CaCl2 + 2H202 moles of HCl neutralizes 1 mole of Ca(OH)2Mole of HCl in 22.18 mL of 0.1939 M solution is calculated using the formula:
moles = molarity × volume in Lvolume of HCl = 0.02218 L
moles of HCl = 0.02218 × 0.1939
moles of HCl = 0.0043 moles
Moles of Ca(OH)2 neutralized = 0.0043/2 = 0.00215 moles
mass of 0.00215 moles of Ca(OH)2 is calculated using the formula:
mass = moles × molar massmolar mass of Ca(OH)2 = 74 g/mol
mass of Ca(OH)2 = 0.00215 × 74
mass of Ca(OH)2 = 0.1591
What is the percentage purity of the Ca(OH)2?Percentage purity is calculated using the formula:
Percentage purity = mass of pure Ca(OH)2/mass of impure × 100%Percentage purityof Ca(OH)2 = 0.1591/0.5505 × 100%
Percentage purity of Ca(OH)2 = 28%
Therefore, the percentage purity of Ca(OH)2 is 28%.
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why do actinides form covalent bond?
Answer:
bonding driven by ionic interactions.
Explanation:
What do all acids have in common?
Answer:Both acids and bases produce a part of a water molecule. Bases dissociate hydroxide (–OH) ions and acids, hydrogen (H+) ions
A compound is found to contain 36.5% Na, 25.4% S, and 38.1% O. Find its empirical formula.
The empirical formula of the compound is =NaSO2
Empirical formulaThis is the formula that analyses the different ratios of atoms in a compound in its simplest form.
To calculate the empirical formula use the least atom percentage ratio. That is,
[tex]na = \frac{36.5}{25.4} = 1.437[/tex]
[tex]s = \frac{25.4}{25.4} = 1[/tex]
[tex]o = \frac{38.1}{25.4} = 2[/tex]
From the calculation, the ratio of the various atoms are
NaSO2
Therefore the empirical formula is NaSO2
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if you need 2.5 mole of sodium hydroxide what mass of aodium hydroxide does weight have
Explanation:
[tex]\large{ \star \fcolorbox{magenta}{purple}{ \fcolorbox{magenta}{blue}{ \fcolorbox{magenta}{pink}{ \fcolorbox{magenta}{red}{ \sf{ 2.5g }}}}}} \star[/tex]
2C2H2(g) + 502(g) → 4C02(g) + 2H20(g) reaction type?
Answer:
The answer is combustion.
A mixture that you can see some or all of the parts of is called a:
1) mechanical solution
2) pure substance
3) mechanical mixture
4) solution
Answer:
i think a solution
Explanation:
sry dont get mad if im wrong
How many molecules of CH4 are in 24.1 g of this compound?
1) find molar mass of CH₄
[tex]=12.01+4(1.01)\\\\=16.05\ g/mol[/tex]
2) determine moles of CH₄
[tex]=24.1g\ CH_{4}\ x\ \frac{1\ mol\ CH_{4}}{16.05g\ CH_{4}}\\\\=1.501557632\ mol\ CH_{4}[/tex]
3) multiply by avogadro's number
[tex]=1.501557632\ mol\ CH_{4}\ x\ \frac{6.022\ x\ 10^{23}\ molecules\ CH_{4}}{1\ mol\ CH_{4}} \\\\=9.04238006\ x\ 10^{23}\\\\=9.04\ x\ 10^{23}\ molecules\ CH_{4}[/tex]
Your town is experiencing a drought in which the weather has been hot and dry for weeks. Infer which type of pressure system is stalled over the area. Explain your answer
The system which leads to drought is high pressure system.
What is drought?Drought refers to a situation in which there is no precipitation in an area over a long period of time. It usually results is unusually hot and dry for several weeks.
This condition of drought is usually caused by a high pressure system which leads to the drought.
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The VSEPR theory is an abbreviation for which term?
A Valence shell electron positive repulsion
B Valence shell electron proton relation
C Valence shell electron pair repulsion
D Valence shell electron positive relation
True or false?
Freshwater can occur as a gas, liquid, or solid.
yes they can i am in 9th rade
(GIVING OUT BRAINLIEST)
Compare and contrast the conditions required for snow and rain to form.
Answer:
Snow forms when the atmospheric temperature is at or below freezing, and there is a minimum amount of moisture in the air. Within a cloud, water droplets condense onto one another, causing the droplets to grow. When these water droplets get too heavy to stay suspended in the cloud, they fall to Earth as rain
Explanation:
Explain how storm surges can affect human life in Florida.
100 cm = 1m
(Choose all that apply)
Group of answer choices
this is an incorrect equality
This is a conversion factor
this could be written as 1m / 100 cm
this could be written as 100 cm / 1m
Answer:
This is a conversion factor
Group 1 elements have an average electronegativity of 0.84 (not including hydrogen). Group 17 elements have an average electronegativity of 2.99. These two groups often form bonds. Given this information, which kind of bond will they likely form (ionic or covalent), and what evidence supports your claim? If it is ionic, then include which group gives up its electron to the other group. In three to five sentences, explain your reasoning
The elements of group 1 makes ionic bond with the elements of group 7 due to high difference of electronegativity values.
Type of bond between group 1 and 7The elements of first group lose its one outermost electrons while on the other hand, the elements of seven group needs one electron so they gain that one electron so they make an ionic bond with each other.
So we can conclude that the elements of group 1 makes ionic bond with the elements of group 7 because of the high difference of electronegativity values.
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What orbits, or revolves, around most planets?
(A) Comets
(B) Moons
(C) Rings
(D) Stars
Answer:
B. Moons
In almost every planet in the Milky Way galaxy, there is at least one moon in their orbit.
Calculate the grams of ethane present in a sample containing 0.8286 moles if the molar mass of ethane is 30.067 g/mol.
What different families present in the periodic table
In the periodic table, there are different ways to categorize the element families. One way is to categorize them as 5 element families, Alkali metals, Alkaline earth metals, Transition metals, Halogens, and Noble gases. There is another method of categorization that recognizes nine element families, Alkali Metals: Group 1 (IA) - 1 valence electron, Alkaline Earth Metals: Group 2 (IIA) - 2 valence electrons, Transition Metals: Groups 3-12 - d and f block metals have 2 valence electrons, Boron Group or Earth Metals: Group 13 (IIIA) - 3 valence electrons, Carbon Group or Tetrels: - Group 14 (IVA) - 4 valence electrons, Nitrogen Group or Pnictogens: - Group 15 (VA) - 5 valence electrons, Oxygen Group or Chalcogens: - Group 16 (VIA) - 6 valence electrons,Halogens: - Group 17 (VIIA) - 7 valence electrons, Noble Gases: - Group 18 (VIIIA) - 8 valence electrons.
The columns of the periodic table mark groups or families, in which there are three systems that have been used to number families and groups. The first one is the older IUPAC system that used Roman numerals together with letters to distinguish between the left and right sides of the periodic table. Secondly is the CAS system that used letters to differentiate main group and transition elements. Lastly is the modern IUPAC system that uses Arabic numbers 1-18, simply numbering the columns of the periodic table from left to right. Many periodic tables use both Roman and Arabic numbers, but the Arabic numbering system is the most widely accepted today.
Group 1 or IA
Alkali Metals:
1 valence electronSoft metallic solidsShiny, lustrousHigh thermal and electrical conductivityLow densities, increasing with atomic massRelatively low melting points, decreasing with atomic massVigorous exothermic reaction with water to produce hydrogen gas and an alkali metal hydroxide solutionIonize to lose their electron, so the ion has a +1 chargeSome examples include Sodium and potassium, and under the right conditions of temperature and pressure, hydrogen can be an alkali metal.Next is Alkaline Earth Metals or Group 2 Family of Elements
Group 2 or IIA
Alkaline Earth Metals (Alkaline Earths):
2 valence electronsMetallic solids, harder than the alkali metalsShiny, lustrous, oxidize easilyHigh thermal and electrical conductivityDenser than the alkali metalsHigher melting points than alkali metalsExothermic reaction with water, increasing as you move down the group; beryllium does not react with water; magnesium reacts only with steamIonize to lose their valence electrons, so the ion has a +2 chargeSome examples include calcium and magnesium.Next is the Boron Group or Earth Metal Family of Elements.
Group 13 or IIIA
Boron Group or Earth Metals:
3 valence electronsDiverse properties, intermediate between those of metals and nonmetalsBest-known member: aluminumThen we have the Carbon Group or Tetrels Family of Elements.
Group 14 or IVA
Carbon Group or Tetrels:
4 valence electronsDiverse properties, intermediate between those of metals and nonmetalsBest-known member: carbon, which commonly forms 4 bondsNext, we have the Nitrogen Group or Pnictogens Family of Elements.
Group 15 or VA
Nitrogen Group or Pnictogens:
5 valence electronsDiverse properties, intermediate between those of metals and nonmetalsBest-known member: nitrogenThen we have the Halogen Family of Elements.
Group 17 or VIIA
Halogens:
7 valence electronsReactive nonmetalsMelting points and boiling points increase with increasing atomic numberHigh electron affinitiesChanges state as it moves down the family, with fluorine and chlorine existing as gases at room temperature while bromine is a liquid and iodine is a solidLast but not least we have the Noble Gas Element Family.
Group 18 or VIIIA
Noble Gases or Inert Gases:
8 valence electronsTypically exist as monatomic gases, although these elements rarely form compoundsStable electron octet makes nonreactive inert under ordinary circumstancesHope this helps, sorry it's a lot.
how do you calculate metal density?
Answer:
You can divide the mass by the volume to calculate the density of the metal
Explanation:
can someone please answer this question for me? i will mark brainliest and it would also be really appreciated! :)
which of the following is a sign a chemical reaction has occurred?
A- A blue liquid is mixed into a yellow liquid, and the mixture turns green.
B- A piece of metal is placed in Water and produces sparks and gas.
C- A liquid is heated on a hot plate, And bubbles form.
D- A solid powder is mixed into a liquid and disappears.
Answer:
The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change.
B- A piece of metal is placed in Water and produces sparks and gas.
Write the steps you would use for ing tea. Use the words solution, solvent solute, dissolve, soluble, insoluble, filtrate an residue.
Answer:
Take a cup of water, as solvent, in a kettle and heat it.Add sugar, the solute, to water. Heat it. The sugar dissolves in water.Sugar is soluble in waterAdd some tea leaves. It is insoluble inwater. Colour of tea leaves goes into the solution.Boil the content and add milk, which is soluble in water.Filter the tea with the help of a strainer. The tea collected in the cup is a filtrate.The tea leaves collected on the strainer is residue.
-TheUnknownScientist 72
Explanation:
water, as solvent,
sugar, the solute,
sugar dissolves in water.
sugar is soluble in water
tea leaves is insoluble in water.
milk, which is soluble in water.
Some chemical reactions releases energy other store energy what important chemical reaction storage energy?
Answer:
endothermic reaction
Explanation:
a chemeical reaction that stores energy is called endothermic reaction. More energy released as products form than the energy needed to break the reactants apart.
3.50 moles of a certain compound contains 1.05 x 10^25 carbon atoms. How many carbon atoms are in the formula of this compound
Th formula of this compound contains 3.0 × 10^24 atoms of carbon since the formula of the compound is 1 mole of the compound.
What is the number of atoms in a formula of a compound?A formula of a compound is a mole of that compound.
A mole of a compound contains 6.02 × 10^23 molecules of that compound.
3.50 moles of the compound contains 1.05 x 10^25 carbon atoms.
1 mole of the compound will contain 1.05 × 10^25/3.5 atoms of carbon.
1 mole of the compound contains 3.0 × 10^24 atoms of carbon.
Therefore, the formula of this compound contains 3.0 × 10^24 atoms of carbon.
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In the following reaction, what does water act as? HCl + H2O = H3O+ + Cl-
Answer:
H2O is the base dissociating for H3O+.
Which of the following are forms of ENERGY? Click all that apply!
O LIGHT
O SOUND
O ELECTRICITY
How many grams are in 0.50 moles of water
Answer:
9.01 grams
Explanation:
~18.02 grams are in 1 mole of water so you'd divide that in half to get 9.01 grams.
Which of the following piece of information would allow one to determine how many atoms are in a specific molecule?
a.
mass of the electron
b.
empirical formula
c.
atomic number
d.
electrical charge
e.
molecular formula
Answer:
it a
Explanation:
You have to decide the grams you have or the grams you get once converted to moles by the atomic mass of the electron you find on the periodic table to get your amount of atoms…
For example…
65.3 grams of oxygen, you look at your periodic table to find the mass and you see it’s rounded to 16. So, you divide the 65.3 by 16, to get your atoms.
65.3/16 =4 atoms.
Molecular mass of the electron would allow one to determine how many atoms are in a specific molecule. Thus option A is correct.
What is molecular mass ?Molecular mass can be defined as the measure of mass related to a molecule means the atomic weight that is the mass of every atom present in the molecule.
Suppose water is composed of 2 hydrogen atoms and 1 oxygen atom, the molecular mass of water is equals to the atomic mass of hydrogen increased by two or more the atomic mass of oxygen.
The mass of the molecule can be controlled by many factors such as Mass Spectrometry is used to decide the mass of l molecule which is otherwise called as monoisotopic mass.
It can be controlled by Hydrodynamic Strategy which need calibration and determine the relative atomic weight.
Static Light Scattering is used to determine the molecular weight from the measure of light dispersed utilizing the Zimm technique.
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When the temperature of water increases the density increases as well.
True
False
Answer: False
Explanation: When the temperature of water increases the density decreases.
What is the connection of ascorbic acid when one tablet is dissolved in 200cm cubed of water ?
Answer:
Option-D: 2.3 × 10⁻³ mol/dm³
Explanation:
Calculate moles of ascorbic acid,
Moles = Mass / M.Mass
Moles = 0.080 g / 176 g/mol
Moles = 0.00045 mole
Also,
Molarity = Moles / Vol. in dm³
Molarity = 0.00045 mol / 0.20 dm³
Molarity = 0.00227 mol.dm⁻¹ or 2.3 × 10⁻³ mol/dm³
