What IONS are present in MgCO₃ (magnesium carbonate)? Mark
all that apply.
A Mg+
B C⁴-
C O2-
D Mg²+
E C⁴+
F CO₃²-
Answer:
Answer:
Explanation:
"Magnesium is an alkaline earth metal, and forms a Mg2+ ion. And carbonate ion, CO2−3 , has an equal an opposite charge. And thus the ionic species is MgCO3"
Ionic substances are composed of two or more ions. The compound MgCO3 is composed of Mg²+ and CO₃²- ions.
What are ions?The term ions refer to charged species that are present in a system. The compound MgCO₃ is an ionic substance and ionic substances are composed of ions.
As such, the compound MgCO₃ is composed of the ions Mg²+ and CO₃²-.
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Richard sketched models of two different neutral isotopes of oxygen. If the
isotope models are accurate, which statement might be true? (Refer to the
periodic table if necessary.)
A. One shows 7 protons, and one shows 9.
B. One shows 8 neutrons, and one shows 9.
C. One shows 8 electrons, and one shows 9.
D. One shows 8 protons, and one shows 7.
Answer:
its b
Explanation:
just did the test on A P E X
If the isotope models are accurate, One shows 8 neutrons, and one shows 9. Therefore, the correct option is option B.
What is isotope?A chemical element's isotope is one of more than one species of atoms that share the same atomic number, spot on the periodic table, and almost identical chemical activity, but differ in atomic mass and physical characteristics. There are a number of isotopes for each chemical element.
The first step in identifying and labelling an atom is to count the protons within its nucleus. Usually, this nuclear number is denoted by the letter Z. The fact that all atoms possessing the same number of electrons have essentially equal chemical characteristics lends the atomic number its enormous significance. If the isotope models are accurate, One shows 8 neutrons, and one shows 9.
Therefore, the correct option is option B. If the isotope models are accurate, One shows 8 neutrons, and one shows 9.
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Ignore the answer I have selected but please help!! Ty in advance, also please explain
Answer:
Iodine is most reactive because it is very close to having a "full shell" which is 8 electrons so they are "eager" to gain the last electron to became balanced, so that makes it the most reactive. Hope that helps:)
Explanation:
1. How would you describe what red cabbage juice is?*
(1 Point)
Acid
Neutral
Alkali
Indicator
Salt
what process formed slate
Answer:
Explanation:
Slate is a fine-grained, foliated metamorphic rock that is created by the alteration of shale or mudstone by low-grade regional metamorphism. It is popular for a wide variety of uses such as roofing, flooring, and flagging because of its durability and attractive appearance.
Answer:
Deep within the Earth's crust rocks can be put under huge pressures and temperatures are very high. These conditions can cause the minerals in the rock to change. This process is called metamorphism. Limestone can change into marble, shale and mudstones into slate, and igneous rocks like granite can turn into gneiss.
Explanation:
Slate is a fine-grained, foliated metamorphic rock that is created by the alteration of shale or mudstone by low-grade regional metamorphism. It is popular for a wide variety of uses such as roofing, flooring, and flagging because of its durability and attractive appearance.
How is the waste in your body similar to the waste in your home or community
Answer:
Your body naturally gets rid of its waste and in your community/home also has sewers and gutters to also get rid of waste.
1. A 7.546 g sample of an unknown compound was analyzed and found to contain only nitrogen and
oxygen. If the mass of nitrogen present in the sample was 1.957 g, determine the empirical formula
of the compound
Answer:
N₂O₅
Explanation:
From the question given above, the following data were obtained:
Mass of compound = 7.546 g
Mass of nitrogen (N) = 1.957 g
Empirical formula =?
Next, we shall determine the mass of oxygen present in the compound. This can be obtained as follow:
Mass of compound = 7.546 g
Mass of nitrogen (N) = 1.957 g
Mass of Oxygen (O) =?
Mass of O = (Mass of compound) – (Mass of N)
Mass of O = 7.546 – 1.957
Mass of O = 5.589 g
Finally, we shall determine the empirical formula of the compound. This can be obtained as follow:
Mass of nitrogen (N) = 1.957 g
Mass of oxygen (O) = 5.589 g
Divide by their molar mass
N = 1.957 / 14 = 0.14
O = 5.589 / 16 = 0.35
Divide by the smallest
N = 0.140 / 0.14 = 1
O = 0.35 / 0.14 = 2.5
Multiply through by 2 to express in whole number
N = 1 × 2 = 2
O = 2.5 × 2 = 5
The empirical formula of the compound is N₂O₅.
A cork has a mass of 3 grams and a volume of 16 cm3. Calculate the density.
Answer:
0.01875kg/m^3
Explanation:
mass=0.003kg
volume=0.16m
density=mass/volume
=0.003/0.16
=0.01875kg/m^3
Can some one help I'm lost iam being timed:( Show using two conversion factors how you would convert from 0.020 kg into mg
Answer:
20000 Mg
Explanation:
How many formula units of CuCl2 are present in 18.42 g?
Answer:
Think 12 units
Explanation:
Because it represents the hands of the clock
How many significant figures are in the following measurement? 433.8 liters
What is the molarity of a solution made from 325.4g of Aluminum chloride with enough water te
make 500.0 mL?*
(1 Point)
AICIAl = 26.9828 C1 = 35.45
mol
8
mol
0.488M
O 4.88M
0 2.44M
0 2.440M
Answer:
awdaef
Explanation:
Why does adding lemon juice to a blueberry smoothie
make it change color from purple to pink.
Answer:
Acidity
Explanation:
Ice floats on the surface of water because ice is less dense than liquid water
true or false?
Answer:
yes it is true.
Ice floats on the surface of water because ice is less dense than liquid water
Explanation:
How many O atoms are in 7.39 g CO2?
Answer:
2 O atoms
hope it helps....
Answer:
2O is the correct answer
Can someone help with these questions please???
10-kg of R-134a at 300 kPa fills a rigid container whose volume is 14 L. Determine the temperature and total enthalpy in the container. The container is now heated until the pressure is 600 kPa. Determine the temperature and total enthalpy when the heating is completed.
Answer:
Temperature = 0.605°C
Total enthalpy at 300kpa = 545.2 kJ
Total enthalpy at 600kpa = 846.45 kJ.
Explanation:
Checking the table for 134a pressure table. It is given that the specific volume of saturated liquid and the specific volume of the saturated vapor of 280kpa is 0.0007699 m^3/kg and 0.072352 m^3/kg respectively.
Also, the specific volume of saturated liquid and the specific volume of the saturated vapor of 320kpa is 0.0007772 m^3/kg and 0.063604 m^3/kg respectively.
The first thing to do is to determine the value for the specific volume of saturated liquid.
At 300 kpa, the specific volume of saturated liquid,n is given below as;
300 - 280/ 320 - 280 = (n - 0.0007699)/ 0.0007772 - 0.0007699.
Therefore, n = specific volume of saturated liquid = 0.0007735 m^3/kg.
300 - 280/ 320 - 280 = n - 0.072352/ (0.063604 - 0.072352).
n = 0.0679 m^3/kg.
The second thing to do is to determine the value of the specific volume.
Specific volume = 14 × 10^-3/ 10 = 0.0014 m^3/kg.
Determine the enthalpy of the mixture,b(I). This is given below as;
300 - 280/ 320 - 280 = b(I) - 199.54/ (196.7 - 199.54).
b(I) = 198.125 kJ/Kg.
Hence, b = [ 300 - 280/ 320 - 280 = j - 50.18 / 55.16 - 50.18] + [ ( 0.0014 - 0.00077735) / 0.067978 - 0.00077735] × 198.125.
b = 54.517 KJ/Kg.
Total enthalpy = 10 × 54.517 = 545.17 kJ.
Temperature can be Determine as below;
300 - 280/ 320 - 280 = T + 1.25 / 2.46 - 1.25.
Temperature = 0.605°C.
Hence, at 600kpa, the total enthalpy = [81.51 + ( 0.0014 - 0.0008199/ 0.034295 - 0.0008199) × 180.90] × 10
Total enthalpy at 600kpa = 846.45 kJ.
A continuously stirred tank reactor is designed to remove the hazardous waste compound trichloroethylene (TCE) from industrial wastewater. The tank is 3250 liters. The wastewater flows into the tank at 200 L/min with a TCE concentration of 25 mg/L. The reactor decays TCE at a reaction rate of 0.20 min-1 . What is the steady-state concentration of TCE in the treated water leaving the reactor
Answer:
the steady-state concentration of TCE in the treated water leaving the reactor is 5.88 mg/L
Explanation:
Given that;
Tank volume v = 3250 liters
wastewater flows into the tank Q = 200 L/min
TCE concentration Co= 25 mg/L
reactor decays TCE at a reaction rate K = 0.20 min-1
mass balance
we know that;
Accumulation = inflow - outflow ± generation
⇒dc/dt = QCo - Qc ± rc.V
now at a steady state; dc/dt = 0
so
0 = QCo - Qc + rcV
where rc = -kc
0 = QCo - Qc - kcV
Qc + kcV = QCo
c(Q + kV) = QCo
c = QCo / (Q + kV)
so we substitute
c = (200 × 25) / (200 + (0.2×3250))
c = 5000 / 850
c = 5.88 mg/L
Therefore, the steady-state concentration of TCE in the treated water leaving the reactor is 5.88 mg/L
Dilute nitric acid reacts with sodium carbonate solution. 2HNO3 (aq) + Na2CO3 (aq) → 2NaNO3 (aq) + H2O (l) + CO2 (g) 25.00 cm3 of sodium carbonate solution of concentration 0.153 mol/dm3 reacts completely with 25.3 cm3 of dilute nitric acid.
a) Calculate the number of moles of sodium carbonate.
b) Use your answer to (a) and the equation for the reaction to calculate the number of moles of nitric acid that reacted.
c) Use your answer to (b) to calculate the concentration of dilute nitric acid in mol/dm3.
d) Use your answer to (a), calculate the maximum volume (at r.t.p.) of carbon dioxide gas that could be produced in this reaction.
What happens when a base dissolves?
A. It increases the concentration of OH in solution.
B. It increases the concentration of H+ in solution.
C. It adds oxygen to the solution.
D. It is no longer dangerous.
Answer:
A. It increase the concentration of OH in solutions.
Explanation:
Bases are substances that react with and neutralise acids, producing water. When dissolved, bases release hydroxide ions, OH-(aq) into solution.
When a base dissolves, it increases the concentration of OH⁻ ions in the solution. Therefore, option A is correct.
What are acids and bases?An acid can be described as a substance that is capable of donating a hydrogen ion to another substance. A base can be described as a molecule or ion that is able to have a hydrogen ion from an acid.
Acidic materials are commonly identified by sour taste. An acid can be considered commonly a molecule that can donate an H⁺ ion and can be energetically favorable after a loss of H⁺ ion. Acids increase the concentration of H⁺ ions in solution.
Bases are described by a bitter taste and a slippery nature. A base or alkali increases the concentration of OH⁻ ions in the solution. When bases react with acids, they give salts and water as products.
The pH range on the pH scale of the acids lies between 0 to 7 and the pH range of the bases lies between 7 to 14.
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Calcium and titanium atoms have the same mass
Answer:
these elements do not have the same masses.
What group of elements on the periodic table is not usually found in nature?
Answer:
Halogens
Explanation:
they they are never found free in nature.
PLZ HELP ITS DUE IN 20 MINUTES, I WILL GIVE BRAINLIST TO RIGHT ANSWER
NiNo3 compound name?
Answer:
Nickel Nitrate
How many sig figs does the number "7.500 x 10^8" have?
Answer:
4 digits that are 7,5,0,0
Explanation:
You have a shirt. If you shine a red light on it, it looks red. If you shine a blue light on it, it looks
blue. If you shine a green light on it, it looks green. What color is the shirt?
Answer: White or Black
Explanation: White is a blank color used for coloring so if you shine a certain color on it it'll show and along goes with black. :)
A mass of 2000 kg is raised through a height of 20 metres in 20 seconds.
What is work done and power developed.
Answer:
Work: 392400 J Power developer: 19620
How many grams of silver nitrate are needed to prepare 0.125 M solution in 250.0 mL of water?*
(1 Point)
AgNO₃
Ag
= 107.868 8
mol
N = 14.0078
mol
8
0 = 15.999
mol
0.313 g
169.872 g
0.0849 g
5.31 g
O 31.3 g
Answer:5.3 grams AgNO3
Explanation:
To solve your problem, take a look at the definition of molality (m):
moles of solute/kg of solvent
You are given the grams of solvent (water) to find the grams of silver nitrate.
First, convert 250 grams to kg:
250 g * 1 kg / 1000g = 0.250 kg
Now that you have the kg of solvent, you can solve for the moles of solute:
kg of solvent * molality = moles of solute
0.250 kg * 0.125 m = 0.03125 mol AgNO3
You can convert the number of moles to grams using the molar mass of AgNO3, which is 169.872 g/mol:
moles of solute * molar mass of solute = grams of solute
0.03125 mol AgNO3 * 169.872 g/mol = 5.3085 g
Because your question provides two significant digits, you must round this number to get the final answer:
5.3 grams AgNO3
I hope this helps!
list 5 island in the Philippines
Answer:
Coron, Palawan, El Nido, Palawan, Cebu, Boracay, Siargao.
Explanation:
I hope this helps.
coron,palawan,El nidu, Cebu and boracay are 5 island in Philippines.....
Classity the following of matter
under the
three basic particles
Oxygen, soduim, water, hydrogen, iron,
potassuim.
chlorine
magnesuimion
Answer:
Oxygen sodium hydrogen iron potassium chlorine are elements
Water is a compound
And magnesium ion is cation.
Morever oxygen hydrogen and chlorine are gases
Water and magnesium ion are liquid
And sodium iron potassium are solids
Explanation: