Answer:
aluminum (solid)
Explanation:
Solids have fixed shape and volume at room temperature.
Matter is defined as any substance that has weight and occupies space. There are three main classes of matter;
SolidLiquidGasSolids are particles have strong attractive force between them. This confers a fixed shape and volume on them.
Liquids are mostly fluids that takes up the shape of containers they occupy. The have intermediate strength of attractive forces.
Gases have weak forces and do not have fixed shape or volume. They take up the shape of any container they are introduced into.
2(NaHCO3) how many atoms of hydrogen
Answer:
2 hydrogen atoms
2 Na atoms
2 carbon atoms
6 oxygen atoms
Answer:
11
Explanation:
what is irons number
Answer:
Iron's atomic number is 26
Explanation:
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.
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 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!
How much heat is absorbed when 500 g of
water, c = 4.184 J/g°C, goes from 25.0 °C to
35.0 °C?
Answer:
Assume that the coffee has the same density, 0.997 g/mL ... One liter of water has a mass of 1 kg and a specific heat of 4.184 J/(g °C).
Explanation:
A car travels 100 m while decelerating to 8 m/s in 5 s.
initial speed is 32
b) What was it's acceleration?
Cases of smallpox were very rare worldwide by 1980. Which most likely explains this? A. an increase in disease education B. a decrease in world travel C. an increase in number of vaccinations of young children D. a decrease in regulations on food preparation
Answer:
C.
Explanation:
The main reason for this decrease is an increase in the number of vaccinations of young children. The smallpox vaccine which was created in 1796 completely allows individuals to easily and quickly fight off the smallpox disease if they were to get it. By being able to fight the disease quickly and effectively it provides less time for the disease to affect another individual. Therefore, causing cases to decrease and become very rare as time goes on.
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
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
1.if I drove 40 miles west in 2 hours what is my velocity
2.find the time it takes for a bird that travels 15 miles per hour for 3 hours
1. v= 20 miles/hr
2. d = 45 miles
Further explanationVelocity is a vector that has both magnitude and direction
Velocity is the ratio of distance per time
Can be formulated :
[tex]\tt v=\dfrac{d}{t}[/tex]
v , m/s
d , m
t, s
1. d = 40 miles
t = 2 hr
[tex]\tt v=\dfrac{40~miles}{2~hr}\\\\v=20~miles/hr[/tex]
2. maybe you meant the distance traveled
v = 15 miles/hr
t = 3 hr
[tex]\tt d=v\times t\\\\d=15\times 3\\\\d=45~miles[/tex]
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
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)
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.
Definition of periodic trends
Answer:
.Periodic trends are specific patterns in the properties of chemical elements that are revealed in the periodic table of elements. Major periodic trends include electronegativity, ionization energy, electron affinity, atomic radii, ionic radius, metallic character, and chemical reactivity.
The circumference of the earth is 25,000 mi at the equator. What is the
circumference in km?
Answer:
40233.6
hope this helps
plz mark brainleist
What term describes the smallest unit that can perform all of the functions necessary for life
Answer:
Cell
A cell is the smallest unit of a living thing. Cells are the basic building blocks of all organisms
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:
what is the scientific method?
A) the process of proving a theory
B) a way of analyzing data
C) a method of testing an idea
D) the steps required to form a hypothesis
Answer:
C- a method of testing an idea
2a. Density is the relationship between mass and volume. Density has
many uses but is most commonly used to help determine the identity of
an unknown substance. Specifically for copper the proportion is
approximately 8.96 grams for every mL of copper. Approximately how
much volume (mL) would 29 grams of copper have? While it is helpful for
you to show all work, you MUST provide rationale for your thinking and
explanation for each of your steps.
The volume of copper : 3.24 ml
Further explanationDensity is a quantity derived from the mass and volume
Density is the ratio of mass per unit volume
With the same mass, the volume of objects that have a high density will be smaller than objects with a smaller type of mass
The unit of density can be expressed in g/cm³ or kg/m³
Density formula:
[tex]\large{\boxed {\bold {\rho~=~ \frac {m} {V}}}}[/tex]
ρ = density , g/cm³ or kg/m³
m = mass , g or kg
v = volume , cm³ or m³
A common example is the water density of 1 gr / cm³
The density of copper : 8.96 gr/ml
mass of copper : 29 g
then the volume :
[tex]\tt V=\dfrac{m}{\rho}\\\\V=\dfrac{29~g}{8.96~g/ml}\\\\V=\boxed{\bold{3.24~ml~or~3.24~cm^3}}[/tex]
Help QUICK!!
Why is scientific notation used?
A. to round numbers to the nearest whole number
B. to promote reproducibility of data
C. to increase the validity of data
D. to express very large or very small numbers
Answer:
c.to increase the validity of data
Answer:
i think its D
Explanation:
pls tell me if im wrong
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.
Which is a compound?
A. smog
B. sea water
C. air
D. magnesium
E. salt
Answer:
The answer is D) Magnesium
Explanation:
Because smog is a mixture
sea water is a mixture
air is an element
And salt solvent
It can only be D
1) Describe the characteristics of molecular compounds that affect their particular physical
properties. (Include melting/boiling points, strength of bonds, reactivity, and 3-dimensional
geometry.)
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
How many grams of sodium chloride must be added to make 400 mL of a 0.600 M sodium chloride?
Answer:
14.0 g
Explanation:
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The mass in grams of sodium chloride must be added to make 400 mL of a 0.600 M sodium chloride is 14 grams.
How do we calculate mass from moles?Mass of any substance will be calculated by using their moles as:
n = W/M, where
W = required mass
M = molar mass
Also we know that, molarity of any solution is define as the number of moles of solute present in per liter of the solution.
M = n/V, where
M = molarity of NaCl = 0.600M
V = Volume of solution = 400mL = 0.4L
n = (0.6)(0.4) = 0.24moles
Now mass of NaCl will be calculated by using the first equation as:
W = (0.24mol)(58.44g/mol) = 14grams
Hence required mass of NaCl is 14 grams.
To know more about moles, visit the below link:
https://brainly.com/question/15374113
***20 pts***
If you had 3.02 grams of Sodium (Na), how many moles would that be?
ANSWER W STEPS IF NOT REPORTED
Answer:
0.131 mol
Explanation:
To convert grams to moles, you need to use the molar mass. The molar mass is the mass number. You can find this on the periodic table. The molar mass of sodium is 22.990 g/mol.
(3.02 g)/(22.990 g/mol) = 0.131 mol
Quick chem question!
I’ll mark BRAINLIEST!!!!! :)
Look at the map of temperature versus latitude
globe. Why are the bands not straight
around
the
across!
The bands not straight around since location is not a factor in measuring temperature. Temperature seems to be not the same as the power of a thermodynamic process.
What is temperature?Temperature is a unit used to describe hotness or coldness. It may be stated in terms of any number of arbitrary scales and shows the direction in which heat energy would naturally flow, i.e., from a hotter body to a region of lower temperature (one at a lower temperature).
Temperature seems to be not the same as the power of a thermodynamic process; for instance, an iceberg has a significantly larger total heat energy than a match, despite the fact that a match is burning at a substantially higher temperature. The bands not straight around since location is not a factor in measuring temperature.
Therefore, the bands not straight around since location is not a factor in measuring temperature.
To know more about temperature, here:
https://brainly.com/question/15267055
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What does e=mc2 mean <3
Answer:
An equation derived by the twentieth-century physicist Albert Einstein, in which E represents units of energy, m represents units of mass, and c2 is the speed of light squared, or multiplied by itself.