Answers
Ba3N2, BaO, BaF2
Related Questions
A- a student has 10.0g sample of CaBr2. Show the setup of the calculation to determine the number of moles of CaBr2 in the sample include units in the setup .(you do not need to do any calculations)
B- what number in addition to the answer to part A is needed to determine the number of atoms of Ca in the sample?
C-a different student is given a 10.0g sample labeled CaBr2 that may contain an inert (non reacting) impurity, identify a quantity from the results of a laboratory analysis that the student could use to determine whether the sample is pure.
D-explain why CaCl2 is likely to have properties similar to those of CaBr2
Answers
Answer:
See explanation
Explanation:
a) number of moles = reacting mass/molar mass
Reacting mass = 10g
Molar mass of CaBr2= 200 g/mol
Number of moles = 10g/200g/mol
b) Avogadro's number = 6.02 × 10^23
c) melting point of the CaBr2
Recall that pure substances have sharp melting points while impure substances melt over a range of temperatures.
d) They are both halide salts of calcium hence they are expected to display similar chemical properties.
Ahhhh Help Please! ASAP! Thanks
Answers
Answer: Argon-52
Explanation: Its B
When an unknown amount of methane reacts with 40.7 g of chlorine, 40.5 g of methyl chloride and 36.5 g of hydrogen chloride form how much methane was used round to the tenth
Answers
Answer:
36.3 gram
Explanation:
CH₄ + Cl₂ = CH₃Cl + HCl
In any reaction , mass is conserved
mass of product = 40.5 + 36.5 = 77 g
Let methane reacted be x .
mass of reactant = x + 40.7
mass of reactant = mass of product
x + 40.7 = 77
x = 36.3 gram
methane reacted = 36.3 gram.
what is 23.54 kg x 9.8 m/s2
Answers
Answer:
230.692
Explanation:
23.54kg*9.8m/s²= 230.692
Answer:
F = 230.69 N
Explanation:
Given data:
Mass = 23.54 Kg
Acceleration = 9.8 m/s²
Force = ?
Solution:
Mass ×Acceleration is equal to force.
F = 23.54 Kg × 9.8 m/s²
F = 230.69 Kg.m/s²
Kg.m/s² = N
F = 230.69 N
What is the boiling point of a drop of water
Answers
Answer:
The boiling point of water at sea level is 100 degrees Celsius, or 212 degrees Fahrenheit.
A chemical formula is provided. How many atoms of hydrogen (H) are found in this substance?
(NH4)2CO3
Group of answer choices
A.2
B.4
C.6
D.8
Answers
Answer:A
Explanation:
The chemical formula depicts the atoms of the elements involved in the substance. In the given substance, ammonium carbonate ((NH₄)₂CO₃), there are 8 hydrogen atoms. Thus, option D is correct.
What is the chemical formula?The chemical formula has been the representation of the elements involved in the chemical reaction with their relative proportions and symbols. It uses subscript to show the number of atoms involved along with the coefficients.
In a chemical compound like ammonium carbonate, there are various elemental atoms involved like nitrogen, hydrogen, carbon, and oxygen. There are two nitrogen, eight hydrogens (4 × 2), one carbon, and three oxygen atoms involved.
Therefore, in option D. there are eight hydrogen atoms in ammonium carbonate.
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What happens to a wave’s energy when it is absorbed by the road?
Answers
What is the amount of heat, in joules, required to increase the temperature of a 49.5-gram sample of water from 22°C to 66°C?
Answers
If you had three molecules of P2SO4, how many total atoms would that be? (will mark brainliest) help me pwzz. i would really be happy if someone helps me
Answers
Answer:
pydlhdgkskydkgsoteltstositsoteotsitstositsitstitsitstssyoyos
46. Which set of numbers balances this equation?. Agl + Na2S →
Ag2S + Nal
O 3,7,20
0 2,1,1,2
O 0,5,0,2
O 2,0,0,2
Answers
Skepticism is important in this scenario because it would help him to learn from the investigations of his colleagues. Ask future questions related to the investigation. Communicate his results at a conference. Ensure that his conclusion is supported by evidence.
Answers
Answer:
hello your question is incomplete below is the missing part of the question
A biochemist performs an experiment to study the behavior of water molecules near proteins. He concludes that water molecules occur in groups of five in the presence of proteins.
answer : Ensure that his conclusion is supported by evidence.
Explanation:
Skepticism during the conduction of an experiment is an act/trait that a scientist possess that will make him/her repeat an experiment for the purpose of verifying the data gotten from the previous experiment
hence the answer to the question is to Ensure that his conclusion is supported by evidence.
True or False: Mechanical weathering is the breakdown or rock by changing its chemical composition.
Answers
Answer: False
Explanation:
That’s not using mechanics
Answer:
False
Explanation:
Mechanical weathering breaks rocks into smaller pieces without changing their composition. Ice wedging and abrasion are two important processes of mechanical weathering. Chemical weathering breaks down rocks by forming new minerals that are stable at the Earth's surface.
Hope this helps☺️
can someone walk me through how to solve this?
Answers
1. The modern periodic table is ordered by which of the following factors?
A. The number of electrons
B. The number of protons
C. The atomic mass
D. The elements
Answers
Answer:
C
Explanation:
3. Converting from the English system to the metric system can be accomplished using _______
Answers
Answer:
You can convert between the various different sizes by merely moving the decimal point the correct number of places. The basic metric units are meters (for length), grams (for mass or weight), and liters (for volume).
Explanation:
please help me answer this question
Answers
Answer:
Pretty sure it is C
Explanation:
Due to the fact that It is talking about biotic survival
Answer:
I think part C
Because u are talking about the survivability
A chemical equation that shows the formulas of the chemicals involved but not the proportions in which they react is called the
a. word equation
b. balanced equation
c. skeleton equation
d. incomplete equation
Answers
A chemical reaction can be expressed in terms of:
words equationthe skeleton equation balanced equationThe skeleton equation is still in unbalanced form
so only chemical formulas of reactants and products so that the relative amounts of the reactants and products are not included
For example :
word equationEthane + Oxygen ⇒ Carbon dioxide + Water
skeleton equationC₂H₆ + O₂ ⇒ CO₂ + H₂O
balanced equation2C₂H₆ + 7O₂ ⇒ 4CO₂ + 6H₂O
incomplete equation2C₂H₆ + 7O₂ ⇒ 4CO₂(H₂0 is still missing)
Imagine that you heat a pot of water to a boil (212°F), then you turn off the stove and let the water sit there. The room is at room temperature (72°F) What temperature do you predict the water cool to after sitting for 8 hours? (
Answers
Answer:
72 °F
Explanation:
Hello,
In this case, since matter tend the be stable at conditions they do not change, if we have water at room temperature (72 °F) and we heat it until boiling but then we turn off the stove, we molecularly see that due to the heat, the molecules start moving faster and crashing to each other; however when that fed energy starts being removed as the stove gets turned off, the molecules lose energy causing them to start moving slower so they lose energy until a point the remain at the initial status, that is 72 °F because thermal equilibrium is reached. Therefore it is likely for the water to be at 72 °F as well once 8 hours have passed, because a thermal equilibrium is reached with the environmetnal temperature.
Best regards.
A light strikes the boundary of a medium at a 45 degree angle instead of entering the second medium the light reflects back into the first medium what can you conclude about the indexof refraction of the second medium
Answers
Answer:
The phenomenon that works here is called Total internal reflection
Explanation:
When the angle of incidence is increased past the critical angle, the refracted angle will not exit the medium and all incident light will reflect back off a boundary back into the first medium.
This phenomenon is called Total Internal Reflection. Total Internal Reflection will only occur with a large angle of incidence that is greater than the critical angle.
Now, when we talk about the second medium
using the Law of refraction
Sini/Sinr =refractive index of medium 2/ refractive index of medium1
when the light ray passes from denser medium to rarer medium TIR happens along with angle of incident should be greater than critical angle. In this case incident angle is 45 degrees
conclusion: medium 2 is rarer here than medium 1
Choose all the answers that apply.
The cell membrane
A.is not a true organelle
B.contains and protects the cell
C.is made of a double layer of phospholipids
D.contains proteins that allow materials to pass through
Answers
Answer:
B or D its a tuff call because
Explanation:
the cell membrane keeps toxic substances out of the cell. they contain receptors and channels that allow specific molecules, such as ions, nutrients, wastes, and metabolic products, that mediate cellular and extracellular activities to pass between organelles
Answer:
B. Contains and protects the cell
C. Is made of a double layer of phospholipids
D. Contains proteins that allow materials to pass through.
Explanation:
All are true except A. Is not a true organelle.
The cell membrane is absolutely an organelle.
Hope this helped!
All waves carry? Which one on the picture
Answers
Answer:
matter
Explanation:
Answer:
All waves carry energy
1. What is the mass of 200 mL of ethanol if the density of ethanol is 0.789g/mL?
Answers
Answer:
The answer is 157.8 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question we have
mass = 0.789 × 200
We have the final answer as
157.8 gHope this helps you
Is an atom a system?
Answers
Answer:
Yes an atom is a system because,the Bohr or solar system model of the atom states that atoms consist of a nucleus with a number of electrons in orbits around that nucleus, similar to a solar system. People have speculated that perhaps atoms are tiny solar systems.
How many shrimp do you have to eat before you make your skin turn pink?
Answers
Answer:
That's kind of a weird question. A lot though.
Explanation:
lot
goofy ahhAnswer:
a
Explanation:
Acceleration is defined as the rate of change for which factor?
A.) displacement
B.) position
C.) time
D.) velocity
Answers
Answer:d
Explanation:
Answer:
The correct answer is D. velocity
Explanation:
I had that same question
5.lodine shine like metal but is not a metal, what are the basis of this
statement?
Answers
Answer:
iodine is shining non metal
Explanation:
because as it is a metalloid .(shows partially metal and non metal),it shows lustor property of metal.
newly discovered substance on Mars has a mass of 2.3x10-5,g and volume of
200 ml. What is its density in g/mL?
Answers
Answer:
The answer is
[tex] \huge 1.15 \times {10}^{ - 7 } \: \: g/ml \\ [/tex]
Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{2.3 \times {10}^{ - 5} }{200} \\ [/tex]
We have the final answer as
[tex]1.15 \times {10}^{ - 7 } \: \: g/ml[/tex]
Hope this helps you
A tide with the largest difference between water levels at high and low tides is known as a spring tide. Two spring tides occur in each lunar cycle. This is because a spring tide occurs when the Moon
A
is closest to Earth.
B
and the Sun pull on Earth at a 90° angles.
C
and the Sun are aligned and pull on Earth.
D
is farthest from Earth.
Answers
Answer:
C is the answer
Explanation:
Tidal cycles are affected by lunar day, semidiurnal and diurnal, lunar nodes, axial tilt ... Their tidal forces act to reinforce each other, and the ocean both rises higher and ... Tidal ranges - differences between neap tides and spring tides - graph ... The perigee of the moon can occur at any point in the orbit around the earth due ...
The correct option is option C among all the given options. This is because a spring tide occurs when the Moon and the Sun are aligned and pull on Earth.
What is tide?Any periodic deformation of one astronomical entity brought on by the gravitational pull of another is referred to as a tide. The most well-known are the regular fluctuations in Earth's sea level that are caused by shifts in the Sun's and Moon's relative locations. You can think of the tides as driven waves, flowing waves, and standing waves.
A tide with the largest difference between water levels at high and low tides is known as a spring tide. Two spring tides occur in each lunar cycle. This is because a spring tide occurs when the Moon and the Sun are aligned and pull on Earth. The Moon's ability to produce tides results from changes inside its gravitational field across Earth's surface in comparison to its strength at the planet's center.
Therefore, the correct option is option C among all the given options.
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7. If an atom had 10 protons, 8 electrons and 9 neutrons, what would the mass number be?
Answers
Answer:
19
Explanation:
10 + 9 protons plus neutrons
What type of energy is the energy of moving things?
a. Mechanical b. Electromagneticc. Sound d. Thermal
Answers
Answer:
A. Mechanical
Explanation:
Mechanical energy is the sum of an object's kinetic energy and potential energy, which are both energies of motion.