Answer:
The mercury with volume of 25 cm³ having weight of 340 g.
Explanation:
Given data:
Density of mercury = 13.6 g/cm³
Volume of mercury = 25 cm³
Mass of mercury = ?
Solution:
We will apply density formula.
d = m/v
13.6 g/cm³ = m/ 25 cm³
m = 13.6 g/cm³ × 25 cm³
m = 340 g
The mercury with volume of 25 cm³ having weight of 340 g.
Write in the name of the molecular geometry for each molecule described below.
A molecule with two atoms and no lone pairs around the central atom has a shape.
A molecule with four atoms and no lone pairs around the central atom has a shape.
A molecule that has two atoms and two lone pairs around the central atom has a shape.
A molecule that has five atoms and no lone pairs around the central atom has a shape.
Answer:
linear
tetrahedral
bent
trigonal-bipyramidal
Explanation:
i just did it one edg
how many neutrons would 34 16 S-2 have? A. 16 B. 18 C. 20 D. 32
Answer:
Explanation:
For
32
S
2
−
, there are 16 protons, 18 electrons, and 16 neutrons.
Explanation:
The atomic number,
Z
, specifies the number of protons, positively charged, massive, fundamental particles present in the sulfur nucleus. This number defines the sulfur atom as a sulfur atom (i.e if there were 17 protons, the atom would be chlorine).
For a neutral atom, if there are 16 positive nuclear charges, there must necessarily be 16 negatively charged particles, 16 electrons, whizzing about the nucleus.
Because electrons have negligible mass, to account for the mass of the isotope, there must be 16 neutrons, 16 neutrally charged, massive, fundamental particles present in the sulfur nucleus.
And thus finally, if we have the
32
S
2
−
ion, there are 18 electrons, 16 protons, and 16 neutrons.
An atom can be defined by its properties:
Atomic number (Z): It is equal to the number of protons present in a neutral atom.Mass number (A): It is equal to the sum of the number of protons and the number of neutrons.An isotope is represented by the general notation of [tex]_Z^A\textrm{X}[/tex], where X is the symbol of an element.
For the given isotopic specie, [tex]_{16}^{34}\textrm{S}^{-2}[/tex], mass number is 34 and atomic number is 16.
Number of neutrons = Mass number - Atomic number
Put the value in the above formula.
[tex]\Rightarrow \text{Number of neutrons}=34-16\\\\\Rightarrow \text{Number of neutrons}=18[/tex]
So, the correct option is (G).
Learn more about neutrons in an atom here: https://brainly.com/question/19958244
The metal was known to have a density of 5.78 g/mL. A graduated cylinder was filled with 22.3 mL of water and after the metal was added the volume was 24.7 mL. What is the mass of the metal?
Answer:
The answer is 13.87 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 of metal = 5.78 g/mL
volume = final volume of water - initial volume of water
volume = 24.7 - 22.3 = 2.4 mL
We have
mass = 5.78 × 2.4 = 13.872
We have the final answer as
13.87 gHope this helps you
Carbohydrates are like identification badges. Cells that have different membrane carbohydrates do different ________________. The immune system uses the carbohydrates to _____________________ that your cells belong to ________ and are not ______________________, ____________________, or other foreign cells..
Answer:
Ansmure two
ismirgonewart
are you
and de band
what is true beauty and the best
Explanation:
itu diatas jawaban nya
A minerals ______ is how it reflects light or how shiny it is
Answer:
Luster
Explanation:
Luster is how the surface of a mineral reflects light. It is not the same thing as color, so it crucial to distinguish luster from color. For example, a mineral described as “shiny yellow” is being described in terms of luster (“shiny”) and color (“yellow”), which are two different physical properties.
Answer:
A Minerals Luster
EXPLANATION:
The Minerals luster is how shiny a mineral is. Luster means a shine or radiance of something, like a polished crystal it gives a sheen of light because it is shiny versus a dirty, worn-out crystal.
PLEASE HELP ASAP!!!
K+ has how many electrons?
-19
-18
-20
-none of these
Answer:
Its 19.
Explanation:
K (potassium) has 19 electron according to the atomic number in the periodic table. The atomic number tells you the number of protons and electrons.
what is the difference between electron dot structure and lewis structures
Answer:
I hope this helps
Explanation:
Lewis symbols, which are also known as Lewis dot diagrams or electron dot diagrams, are diagrams that represent the valence electrons of an atom. Lewis structures, also known as Lewis dot structures or electron dot structures, are diagrams that represent the valence electrons of atoms within a molecule.
evaporation
the process in which a solid changes directly into a gas (the term is
sometimes also used for the reverse process)*
CO
1
Chapter 3 Section 2
21. Which of the following statements is true about ions?
a. Cations form when an atom gains electrons
b. Cations form when an atom loses electrons
C. Anions form when an atom gains protons
d. Anions form when an atom loses protons
I think its B cause...
When an atom loses an electron, it becomes a cation (positive ion). When an atom gains an electron, it becomes an anion. Ions are created when an atom loses or gains an electron. Atoms can never lose or gain protons, as this would change the fundamental identity of the atom.
if I'm wrong...please don't attack me
The cations are formed when an atom loses electrons.
• The positive ions produced by the loss of one or more electrons are known as the cations.
• The most commonly formed cations take place in the case of the elements, which involve the loss of all the valence electrons.
• The resulting cation exhibits the electronic configuration of the noble gas atom.
• The negative ions produced from the gain of one or more electrons are known as the anions.
Thus, the correct answer is option b, that is, the cations form when an atom loses electrons.
To know more about:
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How subduction cause the formation of land mass like mountains and
volcano?
Answer:
Tectonic plates can crash into each other, and soil and dirt will shoot up, creating mountains and volcanos. This is how the Himalayas are actually said to form, when India crashed into Eurasia.
Hope this helps!
How do scientists classify matter
according to their physical and
chemical makeup ?
Answer:
Matter can be classified according to
physical and chemical properties. Matter is anything that occupies space and has mass. The three states of matter are solid, liquid, and gas. ... Pure substances can be either chemical compounds or elements.
What mass of oxygen would be required for the complete combustion of 10 Grams of glucose?
Answer:
For the complete combustion of 10 g of glucose 11.52 g of oxygen is required.
Explanation:
Given data:
Mass of glucose = 10 g
Mass of oxygen required for complete combustion = ?
Solution:
Chemical equation:
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O
Now we will convert the given mass of glucose into number of moles.
Number of moles = mass/ molar mass
Number of moles = 10 g/ 180.156 g/mol
Number of moles = 0.06 mol
Now we will compare the moles of glucose with oxygen.
C₆H₁₂O₆ : O₂
1 : 6
0.06 : 6×0.06 = 0.36 mol
Mass of oxygen required:
Mass = number of moles × molar mass
Number of moles = 0.36 mol × 32 g/mol
Number of moles = 11.52 g
For the complete combustion of 10 g of glucose 11.52 g of oxygen is required.
How many grams of calcium nitrate, Ca(NO3)2 (molecular weight 164), contains 24 grams of oxygen atoms?
a
41 g
b
96 g
c
62 g
d
164 g
An engineer has created a new design for the pipe systems in homes. In this design, pipes are joined together with flexible connectors that will protect against movement of the pipes. This new pipe system can be used for water, gas, and sewer lines. The engineer's design is most likely intended to lessen the impacts of which of the
Answer:
earthquakes
Explanation:
Which of the questions would involve the investigation of kinetic energy?
A. What material makes the strongest boat?
B. How does the color of a boat affect heat absorption?
C. Do boats float higher in salt or fresh water?
D. What is the effect of a boat’s shape on its speed?
Answer:
D. What is the effect of a boat’s shape on its speed?
Explanation:
Kinetic energy can be defined as the energy possessed by an object or body due to its motion. It is the amount of work required to accelerate an object or body with a specific mass from its point of initial rest to a final velocity.
Mathematically, kinetic energy (K.E) is equal to 1/2(mv²).
Hence, the question which would involve the investigation of kinetic energy is "what is the effect of a boat’s shape on its speed?" because speed is directly related to the motion of the boat. Generally, the shape of the hull of a boat has an effect on the speed of the boat.
Answer:
What is the effect of a boat’s shape on its speed?
The oxidation number of oxygen is -2, and that of chlorine is -1. Use this information to match the names of the compounds to their chemical formulas. manganese(II) chloride manganese(IV) chloride manganese(II) oxide manganese(IV) oxide MnCl2 arrowRight MnO2 arrowRight
Answer : The correct formula of manganese(II) chloride and manganese(II) oxide is [tex]MnCl_2[/tex] and [tex]MnO[/tex] respectively.
Explanation :
As we know that the chemical formula is formed by the criss-cross method.
In criss-cross method, the oxidation state of the ions gets exchanged and they form the subscripts of the other ions.
For formation of manganese(II) chloride, manganese will form having an oxidation state of +2 called as cation and anion is chloride with oxidation state of -1.Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral .
For formation of manganese(II) oxide, manganese will form having an oxidation state of +2 called as cation and anion is oxide with oxidation state of -2.Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral .
Hence, the correct formula of manganese(II) chloride and manganese(II) oxide is [tex]MnCl_2[/tex] and [tex]MnO[/tex] respectively.
The oxidation number of oxygen is -2, and that of chlorine is -1
The top guy is wrong↑
#platofam
What reaction would the chemical equation 2H2O→2H2+O2 represent? helppppp!!!
decomposition of water
formation of water
replacement of water
combustion of water
Answer:
C. Decomposition of water
Explanation:
A decomposition reaction occurs when one reactant breaks down into two or more products.This can be represented by the general equation: AB → A + B. Examples of decomposition reactions include the breakdown of hydrogen peroxide to water and oxygen, and the breakdown of water to hydrogen and oxygen.
The equation for the decomposition of water; 2H2O --> 2H2+O2
Answer:
Decomposition of water!
Explanation:
I just took the test, hope it helps!
When vinegar, an acid, is mixed with baking soda, a base, the reaction is similar to the reaction of Alka-Seltzer and water; a salt, water and carbon dioxide are produced. In two or more complete sentences, describe how your knowledge of balancing chemical equations can help you to determine the missing compound. Write your answer in the essay box below. NaHCO3 + HC2H3O2 ⟶ ________ + H2O + CO2
Answer:
no.
Explanation:
you're prolly wondering why cuz this is revenge for your little game you did to me and whoops! i don't know the answer :) !
Fill in the two processes that cause each of the following transitions. Ocean to cloud and cloud to glacier
Answer:
evaporation (when water gets warmed up and turns into water vapor) and precipitation(when the ice crystals become so heavy and melt on the way through the troposphere)
Which professional most likely uses X-ray technology?
a food critic
a dentist
a financial analyst
a pharmacist
Answer:
a dentist
Explanation:
What is the mass of a dolphin swimming at 16 m/s with a momentum of 800 kg m/s?
Answer: 50 kg
Explanation: formula is
m= p/v
m=800 kg m/s : 16m/s
m= 50kg
idk tho hope this helps
True or False: Clouds form when one condensation nucleus expands outward.
Answer:
False
Explanation:
Clouds are formed when air contains as much water vapor (gas) as it can hold. This is called the saturation point, and it can be reached in two ways. First, moisture accumulates until it reaches the maximum amount the volume of air can hold. The other method reduces the temperature of the moisture filled air, which in turn lowers the amount of moisture it can contain. Saturation, therefore, is reached through evaporation and condensation, respectively. When saturation occurs, moisture becomes visible water droplets in the form of fog and clouds.
If you are calculating the grams to mL ratio, you are trying to find the object’s…
Answer:
Density
Explanation:
The ratio of mass to the volume of an object is called its density. Unit of mass is grams and that of volume is mL.
Density = mass/volume
[tex]\text{Density}=\dfrac{\text{grams}}{\text{mL}}\\\\=\text{grams/mL}[/tex]
If you are calculating the grams to mL ratio, it means that we are trying to find the object's density.
what is irons number
Answer:
Iron's atomic number is 26
Explanation:
A is a physical environment where a species lives and
becomes adapted,
a Nest
b Niche
C Habitat
d None of the above
Metalliods have _______ proporties of metals and non metals.
a
both
b
neither
c
different
Answer:
A both
Explanation:
hope this helped
PLEASE ANSWER ASAP!
For her school Science ft Alyssa designs an experiment to learn more about
erosion. Her experimental set up is shown below
Using the illustration shown above, determine which of the following statements best
describes the independent variable itest variable). this experiment:
A The speed she pours the water, since it is the same for all trials.
B The amount of water she pours, because the amount she pours is the same.
C The height of the tray, because this is a change that may cause and effect on the experiment.
D The mass of sand that collects at the bottom of the tray, because this is what is being measured or observed.
Answer:A
Explanation:
To do the experiment
The experimental setup is the part of the scientific method that is done to prove the hypothesis. The test variable of the experiment is the height of the tray as it may cause an effect. Thus, option C is correct.
What is the independent variable?The independent variable has been the test variable that does not depends on other variables and is manipulated by the researcher. It has no fixed value and parameter and is subject to alteration so as to cause an effect on the other variable.
The height of the tray is the independent variable and the mass of the sand is the dependent variable. The height affects the mass of the sand eroded at the bottom. The speed and amount of water have been the controlled variable.
Therefore, option C. the height of the tray with the sand is the independent variable.
Learn more about independent variables, here:
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A container of carbon dioxide has a volume of 240 mL at a temperature of 22°C. If the pressure remains constant, what is the volume at 44°C?
Answer:
Volume of the [tex]CO_{2}[/tex] gas at 44°C is 258 ml.
Explanation
here,
using Charles' law ,
[tex]\frac{V}{T} =\frac{v}{t}[/tex]
where , V= initial volume v= final volume
T=initial temperature t = final temperature
Given - pressure is constant ,
so , putting the values -
V= 240ml
T= 22 + 273K = 295K (since converting celsius into kelvin that
is +273K )
v =?
t = 44+ 273K = 317K
Now , putting the given values in charles' law ,
[tex]\frac{240ml}{295K} =\frac{v}{317K}[/tex]
240ml x317K = v x 295K (through cross multiplication )
v =[tex]\frac{240ml\times317K}{295K}[/tex]
= 258ml .
thus , the volume of carbon dioxide in a container at 44°C IS 258ml .
how did robert hooke contribute to the cell theory?
A. he invented the microscope
B. he said cells can be created from other cells
C. he created cells in his lab
D. he was the first person to use the term “cells”
Answer:
D - He was the first person to use the term Cells.
Explanation:
Hooke invented the first compound light microscope (not first microscope) and he examined a cork and saw that it was made up of thousands of empty pockets which he later called 'Cells'.
Hope it Helps! :D
true or false If beavers built a dam one stream, the kinds of plants and animals that lived around the stream would not be affected.