Which elements below have similar chemical properties? Nitrogen and Arsenic Sodium and Chlorine Fluorine and Aluminum Beryllium and Nickel
Answer:
A period 3 element is one of the chemical elements in the third row (or period) of the periodic ... The third period contains eight elements: sodium, magnesium, aluminium, ... This makes all eight elements analogs of the period 2 elements in the same ... Phosphorus (symbol P) is a multivalent nonmetal of the nitrogen group,
Explanation:
nfs if this is right but its worth a shot!
Which part of the wave is changed when there is interference?
A. the amplitude
B. the crest
C. the trough
D. the wavelength
Answer:
A. the amplitude
Explanation:
Hopes this helps if not then dang.
Where are the transition metals on the periodic table?
A. In the first column
B. In the second column
c. In two rows, separated from the rest of the table
D. In columns 3 - 12 in the center of the table
SUBMI
Answer:
D.
Explanation:
In columns 3 - 12 in the center of the table
What is the term for a combination of two or more substances in any proportions in which the substances do not combine chemically to form a new substance.
A Mixture
B Compound
C Molecule
D Element
If you have an initial water level in a graduated cylinder of 17 mL, and the final water level after placing a 2g aluminum piece in is 20 mL, what is the density of the aluminum in g/mL?
Formula:? Work:? Answer:?
Answer:
The answer is
0.67 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass of aluminum = 2 g
volume = final volume of water - initial volume of water
volume = 20 mL - 17 mL = 3 mL
The density is
[tex]density = \frac{2}{3} \\ = 0.6666666...[/tex]
We have the final answer as
0.67 g/mLHope this helps you
Answer:
0.67g/mL
Explanation:
The formula is [ d = m/v ] where m = mass and v = volume
Find the volume.
20 - 17 = 3
Find the density.
d = 2/3
d ≈ 0.67
Best of Luck!
how many moles are in 23.4g?
What type of bacteria convert the
ammonia and ammonium into nitrates
and nitrites
A. Photosynthetic bacteria
B. Nitrifying bacteria
C.Nitrogen-fixating bacteria
Which best describes the law of conservation of mass? The coefficients in front of the chemicals in the reactants should be based on the physical state of the products. Products in the form of gases are not considered a part of the total mass change from reactants to products. When reactants contain both a solid and a liquid, the solid counts toward the overall mass and the liquid does not. The mass of the reactants and products is equal and is not dependent on the physical state of the substances.
Answer:
D) The mass of the reactants and products is equal and is not dependent on the physical state of the substances.
Explanation:
I took the quiz on Edgenuity
The best description of law of conservation of mass is the mass of the reactants and products is equal and is not dependent on the physical state of the substances. Thus, option D is correct.
What is law of conservation of mass?
Law of conservation stats that the any closed in which mass or energy transfer is takes placed the sum of energy and mass before or after transfer is remain constant.The mass of the reactants and products is equal and is not dependent on the physical state of the substances.
It means that in terms of physics if any closed or open system if mass or energy transfer is takes place from the system the total energy i.e in system or surrounding the total energy will always constant. Law of conservation stats that the any closed in which mass or energy transfer is takes placed the sum of energy and mass before or after transfer is remain constant.
Therefore,the best description of law of conservation of mass is the mass of the reactants and products is equal and is not dependent on the physical state of the substances. Thus, option D is correct.
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Show a numerical setup for calculating the quantity of heat in joules required to completely vaporize 102.3 grams of H2O(l) at 100°C and 1.0 atm.
Answer:
The heat required to vaporize 102.3 grams of H₂O(l) is 231198 J.
Explanation:
The heat required to vaporize 102.3 g of H₂O(l) can be calculated as follows:
[tex] q = m*\Delta H_{v} [/tex]
Where:
q: is the heat
ΔHv: is the heat of vaporization of water = 2260 J/g
m: is the mass = 102.3
[tex]q = m*\Delta H_{v} = 102.3 g*2260 J/g = 231198 J[/tex]
Therefore, the heat required to vaporize 102.3 grams of H₂O(l) is 231198 J.
I hope it helps you!
The heat required to vaporize 102.3 grams of H₂O(l) is 231198 J.
The heat required to vaporize 102.3 g of H₂O(l) can be calculated as follows:
[tex]q=m\times H_v[/tex].....(1)
Here, q is the heat
[tex]H_{v}[/tex]: is the heat of vaporization of water = 2260 J/g
m: is the mass = 102.3 g
Substitute the value in equation (1) as follows:-
[tex]q=102.3\ g\times2260\ J/g\\\\=231198\ J[/tex]
Therefore, the heat required to vaporize 102.3 grams of H₂O(l) is 231198 J.
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What is the common size for beakers and flasks?
Answer:
the average size for a flask is 8 ounces.
Explanation:
i found this info on beaker:
Beaker Capacity Diameter Height
50 ml beaker 4 cm 5.5 cm
100 ml beaker 5 cm 7.2 cm
150 ml beaker 6 cm 8.5 cm
250 ml beaker 7 cm 9 cm
Which surface has the least amount of friction?
Answer:
Smooth surface
Explanation:
I hope that helps
smooth surface OK please give me the brain list answer
I need sum help on this
Answer:
Protons and Neutrons
Explanation:
Neutrons and protons constitute almost all of an atom's mass. The third type of stable particle is the electron. Electrons have a negative charge but are extremely small and have a mass only 1/1850 that of a proton or neutron. They are so small that for practical purposes they do not contribute to the mass of the atom.
I hope this helped!
__CH4+O2-->__CO2+__H2O
CH4 + 2O2 --> CO2 + 2H2O
On the reactant side you start with 1 carbon, 4 hydrogen, and 2 oxygen. On the product side you start with 1 carbon, 2 hydrogen, and 3 oxygen. In order to get them equal, you need to put 2 in front of the H2O which equals out the number of Hydrogen on both sides. But Now we must balance the Oxygens. Because of the H2O we now have 4 Oxygens on the product side and only 2 on the reactant. In order to balance this, we put a 2 in front of the O2 giving us 4 hydrogen on both sides, Balancing the equation
Calculate the value of 0.1394÷0.004 showing all workings
Answer:
34.85
Explanation:
What are examples of how science has influenced technology?
Explanation:
Science and technology help each other advance. Scientific knowledge is used to create new technologies. New technologies often allow scientists to explore nature in different ways and make new discoveries. Examples of technologies that have helped science advance include the telescope and microscope.
I
A 5.29g piece of an unknown solid is placed in a graduated cylinder that initially contained 5.00mL of water, if
the water rises to 12.6mL, what is the density of this solid?
Answer:
about 0.7 g/mL
Explanation:
Density = mass ÷ volume
D = 5.29 g / (12.6 mL - 5.00 mL)
D = 5.29 g / 7.6 mL
D = 0.696052.... g/mL
D = about 0.7 g/mL
pls help!! will give brainly
New evidence can lead to a change in scientific knowledge. (3 points) True False
Answer:
True
Explanation:
What is the mass of an object with a density of 0.3456 g/cm3and a volume of 112.4 cm3?
Answer:
The answer is
38.85 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
density = 0.3456 g/cm³
volume = 112.4 cm³
The mass of the object is
mass = 0.3456 × 112.4 = 38.84544
We have the final answer as
38.85 gHope this helps you
An atom has 16 protons and 17 neutrons.
What is the chemical symbol for the atom?
A: 33S
B: 32Cl
C: 33Cl
D: 32S
Answer:
A: 33S
Explanation:
An atom has 16 protons & 17 neutrons. What is the chemical symbol for the atom? Consult the periodic table.
Answer:
the answer is A
Explanation:
i just took quiz and got 100%
Element in the periodic table are arranged by
elements in the periodic table are arranged by the atomic number of the element
Answer:
The isotope carbon-14 has 6 protons and an atomic mass of 14. Carbon-14
Explanation:
Audio and radio signals can be carried over electric wires and they are examples of ________ current. A) alternating B) direct C) pulsating D) variable
Answer:
Direct current!
Explanation:
Process of elimination, it isn't A, it isn't C, and it definitely isn't D
Answer:
A.) Alternating
Explanation:
Usatestprep
10 pts
A pitcher throws a baseball with a velocity of 33 m/s. If the ball has a mass of 4 kg, how
much kinetic energy does the ball have?
Answer:
The answer is
2178 JExplanation:
The kinetic energy of an object given it's mass and velocity can be found by using the formula
[tex]KE = \frac{1}{2} m {v}^{2} \\ [/tex]
where
m is the mass
v is the velocity
From the question
m = 4 kg
v = 33 m/s
The kinetic energy is
[tex]KE = \frac{1}{2} \times 4 \times {33}^{2} \\ = 2 \times 1089 \\ = 2178 \: \: \: \: \: \: \: \: [/tex]
We have the final answer as
2178 JHope this helps you
Answer:
2,178J
Explanation:
The formula is [ KE = 1/2mv² ] where m = mass and v = velocity.
KE = 1/2(4)(33)²
KE = 1/2(4)(1089)
KE = 1/2(4356)
KE = 2178
Best of Luck!
A scientist is conducting an experiment to determine if eating chocolate ice cream helps students perform better on
science tests. She gives one group of students ice cream but does not give ice cream to another group of students.
She gives the same test out to all of the students and records their scores. In this experiment, the dependent variable
is the
Answer:
I think another group who didn't receive ice creams
In what type of reaction or process does heat flow into the system?
Answer:
through thermal energy
Which type of cell is a rose thorn?
A)prokaryotic
B)eukaryotic
C)eukaryotic animal
D)chloroplastic
Answer: I think it is A
Explanation:
Explanation:
[tex]eukaryotic[/tex]
Hi. I need help with this
Thanks
List and explain the factors that determine ionization energy and atomic volume
Factors that determine ionization energy:
Electronic Repulsion - If the electronic density decreases, the ionization energy with increase and vice versa. If an electron gets released, it decreases the electronic repulsion. This makes releasing another electron harder than the first on unless the electron that is being released comes from another energetic level.# Of Energy Levels - The more energy cores that get filled up, the more ionization levels decrease. When we see the energy levels go from top to bottom, the ionization also go from most to least. This is why ionization occurs on the highest level.Nuclear Charge - The higher the atomic number, the higher charge in the nuclei. This also makes the ionization energy higher as it increases from left to right of in other words, if the nuclear charge gets higer, the energy gets higher as well.Factors that determine atomic volume:
How many protons are in the nucleus (nuclear charge)How many energy levels carry electrons (electrons in outer energy level)Best of Luck!
use dimensional analysis to slove; a small carton of milk contains 1 cup. if a cup equals 8 oz, how many cubic centimeters does it contain?
Answer:
236.59 cubic centimeters
Explanation:
Conversion factors:
1 cup = 8 oz
1 oz = 29.5735296 mL
1 mL = 1 cc (cubic cm)
(1 cup) x (8 oz / 1 cup) x (29.5735296 mL / 1 oz) x (1 cc / 1 mL) = 236.5882368 cc
a solid has ___ shape and ___ volume can anyone tell me the answer
Answer:
fixed shape and a definite volume
Explanation:
Answer:
a solid has a definite shape and definte volume
Explanation:
Calculate the density of a sample of metal that has a mass of 1668 g and takes up a volume of 186.2 cm
Answer:
8,95
Explanation:
Density is equal to mass/volume
[tex]D=\frac{m}{v} \\D= \frac{1668g}{186.2} \\D = \frac{8,95g}{cm^3} \\[/tex]
approximately
Curiosity:
Did you knew that is because of his low density that ships can fluctuate?
Despite their big mass, their volume are far greatter, so the Buoyancy Force acts heavily on them.
Which question cannot be answered through making measurements?
A. How much has the honeybee population declined in North
America?
B. How does a decline in honeybees affect the pollination of crops?
C. Should humans stop using chemicals that harm honeybees?
D. Which chemicals produced by humans cause harm to honeybees?
Answer: C. Should humans stop using chemicals that harm honeybees?
Explanation: Just took the test
The question cannot be answered through making measurements is
Should humans stop using chemicals that harm honeybees?So, option C is correct one.
How chemicals harms the honeybees?The pesticides most harmful for the honeybees.The bees are mostly exposed by residual found in nectar of plants and in water.Mainly, diazinon, imidan, malathion and sevin are the chemicals which is harmful for the honeybees.To learn more about chemicals,
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