Answer:
Transition metals are located in the center.
The dimensions of a rectangular solid are measured to be 1.27 cm, 1.3 cm, and 2.5 cm. The volume should be recorded as
a
4.1 cm^3.
b
4.13 cm^3.
c
4.12 cm^3.
d
4.128 cm^3.
Answer: 4.1 cm3
Explanation:
We have that for the Question "The dimensions of a rectangular solid are measured to be 1.27 cm, 1.3 cm, and 2.5 cm. The volume should be recorded as" it can be said that The volume is
V=4.128 cm^3.
Option D
From the question we are told
The dimensions of a rectangular solid are measured to be 1.27 cm, 1.3 cm, and 2.5 cm. The volume should be recorded as
a )4.1 cm^3.
b )4.13 cm^3.
c )4.12 cm^3.
d )4.128 cm^3.
Generally the equation for the Volume is mathematically given as
[tex]V=L*B*H\\\\Therefore\\\\V=1.27*1.3*2.5\\\\V=4.1275\\\\\V=4.128 cm^3.\\\\[/tex]
Hence The volume is
V=4.128 cm^3.
Option D
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Acid contains. a) h^+. b)oh^-
Answer:
hydrogen ions which is H+
Answer: An acid is a solution with more H+ ions than OH- ions. An acid is any compound that yields hydrogen ions (H+) or hydronium ions (H3O+) when dissolved in water.
Explanation:
A soccer ball was kicked it had the mass of .42 kg and accelerated at 25m what is the force
Which statement best describes how an ionic bond forms?
The transfer of electrons forms strong bonds between ions.
The sharing of electrons forms strong bonds between ions.
The transfer of electrons results in repulsive forces between molecules.
The sharing of electrons results in attractive forces between molecules.
The transfer of electrons forms strong bonds between ions is the best
statement that describes ionic bond formation.
Ionic bond is also known as electrovalent bonding. It involves the transfer
of electrons from an element to another. This is done so as to enable the
elements achieve a stable configuration and formation of new compounds.
The ionic bonds formed are usually strong so as to prevent the elements
from losing their stable configuration.
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I’m doing exams please hurry!
The graph below plots the temperature and luminosity of stars on the main
sequence.
Which of these stars had an initial mass greater than the initial mass of the sun?
Star 1 and Star 2
Star 1 and Star 4
Star 2 and Star 3
Star 3 and Star 4
Answer:
Star 1 and two. Good on exams I'm doing mine two
Answer:star 1 and 2
Explanation:
the chemical properties of calcium are most similar to the chemical properties of
Answer:
strontium and barium
Explanation:
Answer:
Calcium is a chemical element with the symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar to its heavier homologues strontium and barium.
Explanation:
As a forensic expert, Jane needs to handle many biological evidence samples simultaneously. What is the basic precaution that she should take
while doing so?
OA
air dry all the samples
B.
use a new pair of gloves for each piece of evidence
malaman
store samples in humid conditions
Ос.
OD.
use plastic bag for storage
Answer:
B. use a new pair of gloves for each piece of evidence
Explanation:
When it comes to the basic precautions of handling biological evidence samples, one has to prevent cross contamination. This refers to the transfer of DNA from one evidence to another evidence; thus, it is important for Jane to use a new pair of gloves for each piece of evidence in order to prevent such occurrence.
Wearing of gloves will also prevent Jane's DNA from being implanted into the sample, and it will keep her safe from contracting blood-borne pathogens like those in the saliva, blood or semen.
Having energy in the reactant lead to an exothermic reaction.
true
false
Answer:
false
Explanation:
first of all;-energy lead to an indotermic reaction.
indotermic is a reaction that absorbs energy \
*it has positive enthalpy of reaction
*Heat content of product is greater than that of reactant
*Heat is added to reactant side
example;- CO^2+2H^2+891kj --------- CH4 +2O2
How many significant figures does the following number have: 0.99800
Answer:
5.
Explanation:
All 5 numbers after the decimal point, including the zeros, are significant.
10. Bases tend to taste
bitter
Answer:
yessir
Explanation:
Answer:
yxfuu do wiz so chic yucky e
How many grams in 1.000 moles of oxygen gas?
FIND THE DENSITY OF REGULAR SHAPED SOLID
Mass: 1296.09
Answer:
I believe it is 9. mass divided by volume and to find volume multiply LxWxH
How many moles of hydrogen are needed in 100g of water
200 g of just H
100 g of H2
A weather balloon is rising and is about to reach 30,000 ft. The pressure of the helium gas inside the balloon
measures 280 mmHg.
5 pts
6. Will the balloon explode once it reaches 30,000
ft? Your answer should be supported with DATA
from image to the left AND a particle diagram.
45.000
0.15 atm
(1.00 atm = 760.0 mmHg)
40.000
L020 atm
-57°C
Hint: Draw a particle diagram showing the
pressure helium gas inside the balloon AND the
atmospheric gas surrounding the balloon
35.000
025 atm
30.000
0.30 atm
- 45°C
25.000
0.40 atin
Altitude (ft)
- 35 °C
Atmospheric Pressure
20.000
0.50 atm
15.000
0.60 am
10.000
-5°C
070 at
5.000
5°C
0 85 atm
Sea level
17°C
00 am
Answer:Twice a day, every day of the year, weather balloons are released simultaneously from almost 900 locations worldwide! This includes 92 released by the National Weather Service in the US and its territories. The balloon flights last for around 2 hours, can drift as far as 125 miles away, and rise up to over 100,000 ft.
Explanation:
Is oxygen a polar molecule or a nonpolar molecule?
Explain your reasoning.
Answer:
Oxygen is a nonpolar molecule.
Explanation:
It is symmetric, because two oxygen atoms pull on the electrons equally. Propane is also nonpolar.
Complete the following, making sure to show your math work. Use the balanced equation for photosynthesis for all problems.
6CO2 + 6H2O — > C6H12O6 + 6O2
1. If 30 moles of CO2 react, how many grams of O2 would be formed?
2. How many grams of glucose would be produced when 10 moles of water are consumed?
3. If 40 grams of CO2 react, how many moles of O2 would be formed?
4. How many moles of glucose would be produced when 10 grams of water are consumed?
5. If 30 grams of CO2 react, how many grams of O2 would be formed?
6. How many grams of glucose would be produced when 10 grams of water are consumed?
Answer:nokb jlbuj
Explanation:
Why is no chemical reaction necessary to extract gold?
Explanation:
Because gold is a very unreactive metal and exists as a pure substance (instead of oxides).
Which of the elements listed below has the smallest atomic radius? Sulfur O Chlorine Oxygen Fluorine
Answer:
F has the smallest atomic radius.
Explanation:
Atomic radius is one of the perIodic properties defined by the Periodic Table.
Atomich radius is the distance to the nucleus that comprises 95 % of the density electronic load. It can be defined as a function of the internuclear distance. Although this distance varies, depending on whether the atoms are linked by a chemical bond or simply in contact without forming link.
Atomic radius is a periodic property that increases by period (from the top to below) and decreases (from left to right) by group.
In the same group are O and F, so F < O
In the same group, we have S and Cl, so Cl < S
As Cl and F are in the same period, we define the atomic radius Cl > F and
S > Cl (In the same period)
The right way to order the elements are S > Cl > O > F
Answer:
Cadmium has larger atomic radius than sulfur.
Explanation:
Down a period, atomic radii decrease from left to right due to the increase in the number of protons and electrons across a period: when a proton is added the pull of the electrons towards the nucleus is larger, so the size of the atom decreases.
Hence, you can compare the elements that belong to a same period and predict that the atom with lower atomic number (number of protons) will haver larger atomic radius. With that:
Oxygen and fluorine are in the period 3, being oxygen to the left of fluorine, so oxygen is larger than fluorine.
Sulfur and chlorine are in the period 4, being sulfur to the left of chlorine, so sulfur is larger than chlorine.
Now see whan happens down a group. Atomic radius increases from top to bottom within a group due to electron shielding. That permits you to compare the size of the elements in a group:
Fluorine and chlorine are in the same group (17), with chlorine directly below fluorine, so the atomic radius of chlorine is larger than the atomic radius of fluorine.
Sulfur and oxygen are in the same group (16), with sulfur directlly below oxygen, so sulfur the atomic radius of sulfur is larger than the atocmi radius of oxygen.
So far, you can rank the atomic radius of sulfur, chlorine, fluorine, and oxygen, in increasing order as:
O < F < Cl < S, concluding that O, F, and Cl have smaller atomic radius than S.
Cadmiun, Cd, is to the left and below sulfur, so both electron shielding (down a group) and increase of the number of protons (down a period) lead to predict the cadmium has a larger atomic radius than sulfur.
What information can typically be found on the periodic table?
A. The names of molecules formed by the element
B. The date an element was discovered
C. The number of isotopes an element has
D. The number of protons an element has
Answer:
Number of protons
Explanation:
The information can typically be found on the periodic table is:
D. The number of protons an element has
The information typically found on the periodic table includes the chemical elements' properties, including:
The element's symbol: A one or two-letter abbreviation used to represent the element (e.g., H for hydrogen, O for oxygen, etc.).The element's atomic number: This is the number of protons in the nucleus of one atom of the element. It uniquely identifies each element and determines its position on the periodic table.The element's name: The common name of the element (e.g., hydrogen, oxygen, etc.).The element's atomic weight: This is the average mass of the element's atoms in atomic mass units (amu).The element's electron configuration: The arrangement of electrons in the electron shells of the atom.The element's group and period: Elements are organized into groups (columns) and periods (rows) based on their similar chemical properties and increasing atomic number.Now, let's briefly go over the other options:
A. The names of molecules formed by the element: The periodic table does not typically list the names of molecules formed by elements. Instead, it provides information about the individual elements themselves.
B. The date an element was discovered: The periodic table does not include information about when an element was discovered. It focuses on the fundamental properties of the elements.
C. The number of isotopes an element has: The periodic table may provide information about the atomic mass of the element, which is the weighted average of all its naturally occurring isotopes. However, it does not explicitly list the number of isotopes an element has.
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34. Many bicycles have generators that have a light that can be powered without a battery.
Instead of a battery, a magnet and a coil of wire are used to make an electric current flow. The
setup shown below models how a bicycle generator functions to produce light. Currently, no
electric current is flowing through the circuit shown.
What needs to happen to cause an electric current to flow through the circuit?
A. The magnet needs to be in constant motion.
B. A bigger light bulb needs to be used.
C. The magnet's north pole needs to point up.
D. A smaller wire needs to be used.
To what temperature does a 250 mL cylinder containing 0.1 MOLHE need to be cooled in order for the pressure to be 253.2 5 K PA
we use the formula
pV=nRT
we convert Kilo Pascals to mmHg
253.25 KPa=253250 pascals
1mmHg is equal to 133.322 pascals
xmmHg are equal to 253250pascals
x=253250/133.322=1900mmHg
now we convert mmHg to atmospheres
1 atmosphere is equal to 760mmHg
x atmospheres are equatl to 1900mmHg
x=1900/760=2.5 atmospheres
in the formula:
pV=nRT
p-pressure
V-volume
n-number of moles
R-ideal constant of gases
T-temperature
the only missing variable is temperature since we know that R=0.082
250ml=0.25L
0.25*2.5=0.1*0.082T
T=0.625/0.0082=76.219K
Removal of only one organism from a habitat can have a negative effect on other organisms. What details from the article support this claim? Think about what you know about organisms in their environment, and then explain how the details support the claim.
Answer:
When we refer to microorganisms, if one is not there, the environment changes and another microbiota begins to predominate in the organism, which can be more or less pathogenic.
Explanation:
When the microorganisms that coexist and form the commensal biota, they live in an ideal equilibrium environment without generating pathology in humans, on the other hand, when this equilibrium is broken because some bacteria are absent, the pathology or infectious disease appears as it gives rise to to a rare biota such as pathogenic or transient.
i need help please I dont understand this
Answer:
b
Explanation:
bbbbbbbbbbbbbb
Answer:
I think its B
Explanation:
Ba+2 + 2Cl- + 2Na+ + SO4- ----> BaSO4 is not soluable so you can't break that up.
BaSO4 (s) + 2 Na+ + 2Cl-
C: Ms. Bakare has two bottles of sulfuric acid, X and Y. There is one litre of acid in each bottle.
The acid in bottle X is concentrated.
The acid in bottle Y is dilute.
Predict one difference in the properties of the acids in bottles X and Y.
a.
Acid of x bottle is highly reactive because solute is more and acid of y bottle is less reactive because solvent is more.
is cleaning a penny a chemical change or physical change
Answer:
physical
Explanation:
How many liters of oxygen are needed to react with 48.2 g of CO2?
Explanation:
This is most likely a trick question as oxygen do not react with CO2.
What mass of propane could burn in 48.0 g of oxygen?
C3H3 + 502
3CO, + 4H2O
Answer:
Explanation:
mass of 5 mole of oxygen=5*32=160 g
mass of propane =39 g
39 g of propane burn in 160 g of oxygen
so x g could burn in 48.0 g of oxygen=x*160=39*48.0
x=1872/160=11.7 g
therefore 11.7 g of propane could burn in 48.0 g of oxygen
When 16 grams of Tin and Hydrogen Fluoride react, they must produce how many grams of product?
A. 32
B. 8
C. 20
D. 16
Letter b is the answer
Which of the following is true about the reactions shown below?
C5H12 + 8 02 --> 5 CO2 + 6 H20 *
(1 Point)
O 9 moles of reactants chemically change into 11 moles of product
9 liters of reactants chemically change into 11 liters of product
9 atoms of reactants chemically change into 11 atoms of products
9 grams of reactants chemically change into 11 grams of products
the answer to this equation is " double replacement "
hopefully i helped
Answer:
9 moles of reactants chemically change into 11 moles of product
Explanation:
The illustration shows a roller coaster and indicates four different positions the car might be at as it moves along the track. Identify at which point in the roller coaster’s journey does it have the least potential energy and explain why. will give brainliest
Answer:
Y
Explanation:
Okay so, the least amount of potential energy translates to the most amount of kinetic energy. Potential energy is normally higher at the top, top of a roller coaster, building, etc. And so Y or W must be the answer. Y has less potential energy since it is longer. There is more time for the kinetic energy to stay as kinetic energy before reaching the top and transforming into potential energy. You could choose W but I don't think it's the right answer. Hope this helps!
Answer:
W
Explanation:
It reaches its lowest point on W.
