Answer:
4 MolExplanation:
Just divide the mass of how much AgCl by the mass per mole to give you the number of moles, 573.28g 143.318gmol−1 AgCl = 4.00molAgCl
Hope this helps! <3
1. Determine the number of significant figures in the following measurements.
a. 38.7 g 3 significant figures
b. 3 486 002 kg 7 significant figures
c. 0.00013 cm
d. 0.001400 g/L
e. 9 740 000 nm/s
Answer:
2 and 4 and 3
Explanation:
in c. leading 0's are never significat. Numbers 1-9 are always significant.
d. leading 0's are never significant. numbers 1-9 are always significant. ending 0's are only significant when there is a decimal.
e. numbers 1-9 are always significant. 0's are not significant because there is no decimal.
WILL GIVE BRAINLIEST
Answer:
1 Mole
Explanation:
1 mole is equal to 1 moles NH4, or 18.03846 grams.
state the volume of SO2 and O2 at RTP that would produce 180cm3 of SO3
Answer:
(180 cm^3 SO3) x (2 mol SO2 / 2 mol SO3) = 180 cm^3 SO2
(180 cm^3 SO3) x (1 mol O2 / 2 mol SO3) = 90 cm^3 O2
Which of the following would be a clue that rock is igneous?
A.It has crystals.
B.It has a complete fossil in it.
C.It has bands.
D.It is very soft.
Answer:
A is the answer to your question
They usually have crystals since they are formed from lava
What is the most common acid and base on earth?
Answer:
hydrochloride acid
Explanation:
hope this helps :D
The type of response when a plant moves away from the stimulus
Answer:
A tropism is a turning toward or away from a stimulus in the environment. Growing toward gravity is called geotropism. Plants also exhibit phototropism, or growing toward a light source. This response is controlled by a plant growth hormone called auxin.
Explanation:
The chemical equation below shows the burning of magnesium (Mg) with oxygen (O2) to form magnesium oxide (MgO). 2Mg + O2 Right arrow. 2MgO Niven wants to calculate the mass of MgO that is produced by the burning of 28.0 g of Mg. What is the first step in Niven’s calculation?
- Balance the chemical equation.
- Convert grams of Mg to moles.
- Determine whether heat is given off by this reaction.
- Find the number of Mg atoms in the sample.
Answer:
Convert grams of Mg to moles
Explanation:
In stoichiometric calculations, the first thing is always to balance the chemical reaction equation. However, in this particular instance, the equation is already balanced; 2Mg + O2 ---------->2MgO as shown in the question.
Hence, what Niven now has to do is to convert grams of Mg to moles so that the amount of MgO obtained can be calculated and subsequently converted to mass.
Which has a lower freezing point oxygen or ethanol
Answer:
Oxygen
Explanation:
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Answer:
kevin gates with his fine self.
Explanation:
50mL of ethanol (density=0.79 g/mL) is dissolved by 400 mL of water. What is the concentration of ethanol in this solution?
The concentration of ethanol in this solution : 2.14 M
Further explanationMolarity is a way to express the density of the solution
Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution
[tex]\tt \large{\boxed{\bold {M ~ = ~ \dfrac {n} {V}}}[/tex]
Where
M = Molarity
n = Number of moles of solute
V = Volume of solution
Ethanol(C₂H₅OH) MW =46,06844 g/mol[
mass of solute (Ethanol)[tex]\tt 50\times 0.79=39.5~g[/tex]
mol of Ethanol[tex]\tt \dfrac{39.5}{46.06844}=0.8574[/tex]
molarity[tex]\tt \dfrac{0.8574}{0.4}=2.14~M[/tex]
The Top Thrill Dragster, a rollercoaster at Cedar Point in Ohio, soars through the air at 176ft/sec. How fast is this in mph?
The rollercoaster has a speed of 176 ft/sec. This can be converted to miles per hour. The speed is equivalent to 120 mph.
What is speed ?Speed is a physical quantity measuring the distance travelled by an object per unit time. Speed is a scalar quantity. The rate of speed is called velocity.
The speed can be expressed in different units. such as m/s, km/h, ft./s miles per hour etc. These units can be interconverted using specific relations.
One ft/s = 0.682 mph
then, 176 ft./s = 0.682 × 176 = 120 mph.
Therefore, the speed of the roller coaster is 120 mph.
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Ionic compound to name ai2o3
Explanation:
aluminium oxide had the chemical formula Al2O3
The name of ionic compound Al₂O₃ is aluminium oxide.
The naming of ionic compounds involves using the names of the constituent ions to form the compound's name. The name of the cation (positively charged ion) comes first, followed by the name of the anion (negatively charged ion).
Here are the general steps to name an ionic compound:
Name the cation: Use the name of the metal or polyatomic ion as it appears in the periodic table or ion list. If the metal has multiple oxidation states, use Roman numerals in parentheses to indicate the charge.Name the anion: For monatomic anions (single atoms), use the root name of the nonmetal element and add the suffix "-ide." For polyatomic anions (multiple atoms bonded together), use their specific names as listed in tables or formulas.Combine the names: Put the cation name first, followed by the anion name.Learn more about Naming of ionic compounds, here:
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10.8 1.0
Electronegativity difference of Mg and O:
yes
no
Answer:
2.3 / yes
Explanation:
edg 2020
Answer: 2.3 and yes
Explanation:
Barium chlorate (Ba(ClO3)2) breaks down to form barium chloride and oxygen. What is the balanced equation for this reaction? When counting atoms in parentheses multiply all subscripts by the number outside the parentheses to get the number of atoms
Answer:
C
Explanation:
The balanced equation for breakdown of barium chlorate into barium chloride and oxygen as follows: [tex]\rm 2 Ba(ClO_3)_2 \rightarrow 2 BaCl_2 + 3 O_2[/tex]
In chemistry, a balanced equation is one that depicts a reaction in which there are the same numbers of atoms of each element on both sides of the equation. The idea that matter is neither generated nor destroyed during a chemical reaction is known as the conservation of mass.
It is possible to write the equation for the balanced breakdown of barium chlorate into barium chloride and oxygen as follows: [tex]\rm 2 Ba(ClO_3)_2 \rightarrow 2 BaCl_2 + 3 O_2[/tex] . The number of atoms must be taken into consideration in this balanced equation by multiplying the subscripts inside brackets by the coefficient outside of the brackets. With the same number and kinds of atoms on both sides of the reaction, this guarantees that the equation complies with the rule of conservation of mass.
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All elements are unstable except the noble gases
True or False
Answer:
True
Explanation:
Noble gases already have the maximum number of valence electrons they can hold so they are the only stable group
Based on atomicity , how molecules are categorized
Answer:
On the basis of atomicity, molecules can be classified as : Monoatomic-composed of 1 atom e.g. He, Ne, Ar (all noble gases are monoatomic) Diatomic-composed of 2 atoms e.g. H2 , N2 , O. Triatomic-composed of 3 atoms e.g. O
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Which type of energy produces almost no waste or pollution?
A: burning coal
B: nuclear energy
C: solar energy
Answer:
B: nuclear energy.
Explanation:
It is emission-free and it saves 2.4 billion tons of carbon emissions per year. Also, the level of hazard of nuclear waste does decrease during the time.
Hope that helps!
200 mL of nitrogen gas at 24K is heated to 47K.
Answer:
See explanation
Explanation:
The question is incomplete. However, base on the given information, one likely question could be that, we calculate the the volume of the nitrogen gas after heating it.
So, we have that:
Initial Volume, V1 = 200mL
Initial Temperature, T1 = 24k
Final Temperature, T2 = 47k
To solve the final volume of the gas, we apply the following ideal gas law equation
V1 * T1 = V2 * T2
Substitute values for V1, T1 and T2
200mL * 24K = V2 * 47K
200mL * 24 = V2 * 47
4800mL = 47V2
Solve for V2
V2 = 4800/47
V2 = 102.13 mL ------- Approximated
Hence, the volume of nitrogen gas after heating is 102.13mL
What type of element is Hydrogen? Where do you see hydrogen present?
/~\ The correct answer is:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Hydrogen is a chemical and is found in the sun and most of the stars, and the planet Jupiter is composed mostly of hydrogen. On Earth, hydrogen is found in the greatest quantities as water.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
I hope this helps! /~\
What type of relationship exists between
dissociation constant and pk values
A Linear
B Directly Proportional
C Direct
D Inverse
Answer: D inverse . The product of Ka and Kb equals the auto-dissociation constant for water.
Explanation: i hoped that helped and Plz give as a brainliest !!
BRAINLIEST IF RIGHT
Students at a school are comparing soil samples from random gardens around the neighborhood to identify the best soil to use for their community garden. The students know that soil texture affects the consistency of soil and how easily water can move into the soil. Which of the following soil sample should the student’s choice for their garden?
A.
Sample A
B.
Sample C
C.
Sample D
D.
Sample B
why is iron important constructing bridges and houses?
PLEASE answer these for a brainlist
What are some examples of the flint water crisis? What are adults experiencing in their water and what are the effects on the kids?
What are the safe levels of Lead exposure?
What is the relationship between the blood levels in people and crime rate?
What was the decision made by Flint to save money on water?
What happened in October 2015? How did the water switch affect the people's blood lead levels?
Answer:
avada kadvera
Explanation:
what comes around goes around
True or False:
C + 02 - CO2
In the chemical reaction above, the coefficient of oxygen is 2.
False
True
Answer:
Explanation:
From the work of Krogh in 1918 until the present time, a very wide range of values for oxygen diffusion coefficients has been reported1–5 ranging from 1.1 × 10−4 to 4 × 10−8 cm2 sec−1.
A forensic chemist performs a flame test on a substance found at a crime scene. What can the scientist conclude it the sample produces a green flame?
Answer: The forensic examination of substances involve a preliminary flame test.
Explanation:
The forensic chemical analysis of samples involves the flame testing which is one of the preliminary test. The materials are burned on a flame and the color of the flame is considered indicative of the elements present in the material.
The substances like Borax (sodium borate), Copper(II) sulfate, and boric acid burn with a characteristic green flame.
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Ammonium chloride reacts with calcium oxide to produce ammonia, calcium chloride, and water. If 7.4 grams of ammonia are produced, how many grams of calcium chloride are also
produced?
Answer:
Mass of calcium chloride produced = 24.14 g
Explanation:
Given data:
Mass of ammonia produced = 7.4 g
Mass of calcium chloride produced = ?
Solution:
Chemical equation:
2NH₄Cl + CaO → 2NH₃ + H₂O + CaCl₂
Number of moles of ammonia produced:
Number of moles = mass/molar mass
Number of moles = 7.4 g/ 17 g/mol
Number of moles = 0.435 mol
Now we will compare the moles of ammonia and calcium chloride.
NH₃ : CaCl₂
2 : 1
0.435 : 1/2×0.435 = 0.2175 mol
Mass of calcium chloride produced:
Mass = number of moles × molar mass
Mass = 0.2175 mol ×110.98 g/mol
Mass = 24.14 g
What is the density of a substance that has a mass of 42.8 g and a volume of 2.0 cm^3?
Answer:
21.4
Explanation:
Mass = M/V
42.8/2.0 = 21.4
:)
i need help on this its due Monday
The properties of the elements can be determined from their electron configuration
Further explanationMg ⇒electron configuration :[Ne] 3s²outer electron : 2 (3s²)
lose(2 electron)
charge : +2
cation (positive)
symbol : Mg²⁺
Br⇒electron configuration : [Ar] 4s²3d¹⁰4p⁵outer electron : 7 (4s²4p⁵)
gain ( 1 electron)
charge : -1
anion (negative)
symbol : Br⁻
Helium⇒electron configuration : 1s²
outer electron : 2 (1s²)
stabil(no gain/no lose)
charge : 0
neutral
symbol : He
Nitrogen ⇒electron configuration : [He] 2s²2p³outer electron : 5 ( 2s²2p³)
gain(3 electron)
charge : -3
anion
symbol : N³⁻
25 pointss How do the plates and mantle interact at each type of plate boundary?
Answer:
what that girl said lol
Answer:
honestly.. idk lol
Explanation:
0.50g of a volatile liquid was introduced
into a globe sf 1000ml capacity. The globe
was heated to 91°C, so that all the liquid
vapourised exerted
a pressure of 190 mmHg.
Calculate the molecular mass of the lliquid.
Answer:
59.52g/mol
Explanation:
This question can be answered using the formula;
PV = nRT
Where;
P = pressure (atm)
V = volume (L)
R = gas constant (0.0821 Latm/molK)
T = temperature (K)
From the information provided:
P = 190mmHg = 190/760 = 0.25atm
V = 1000ml = 1000/1000 = 1L
n = number of moles = ?
T = 91°C = 91 + 273.15 = 364.15K
PV = nRT
0.25 × 1 = n × 0.0821 × 364.15
0.25 = 29.8967n
n = 0.25/29.8967
n = 0.0084mol
Mole = mass/molar mass
Molar mass = mass/mole
Molar mass = 0.50/0.0084
Molar mass = 59.5238
Hence, the molecular mass of the liquid is 59.52g/mol