Answer:
magnesium
Explanation:
it is the only metal in the choices. everything else is on the right side of the old line that separates metals and nonmetals on the PPT. nonmetals aren't, shiny or good conductors or malleable or ductile. only metals can have those qualities. the only metal is magnesium
Pedro's book weighs 19/4 pounds. Blanca's book weighs 17/7 pounds. Use estimation to determine about how much more Perdro's book wweighs than Blanca's.
A 1lbs
Sorry I meant math.
B 2lbs
C 6lbs
D 7lbs
Answer:
2pounds
Explanation:
Given parameters:
Weight of Pedro's book = [tex]\frac{19}{4}[/tex] pounds
Weight of Blanca's book = [tex]\frac{17}{7}[/tex] pounds
Unknown:
How much more does Pedro's book weigh more than Bianca's book ?
Solution:
To Solve this problem, let us convert the fractions to decimal;
Weight of Pedro's book = 4.75 pounds
Weight of Bianca's book = 2.43 pounds
Differences = 4.75pounds - 2.43 pounds
= 2.32 pounds
Estimating gives 2pounds
Where is most of the water on earth found? What percentage?
Answer:
The ocean holds about 97 percent of the Earth's water; the remaining three percent is found in glaciers and ice, below the ground, in rivers and lakes. Of the world's total water supply of about 332 million cubic miles of water, about 97 percent is found in the ocean.
wait..if you asking about the country it's Brazil✌️
Hi can someone help me with this question!
First one to answer it I will make u brainliest
Answer:
Test 2
Explanation:
............................................
Answer:
(B) Test 2
Explanation:
The entire substance changed, and turned into a liquid.
Which compound is
ionic?
Answer:
chemistry
Explanation:
Hydrogen bond is not formed by 1) oxygen 2) nitrogen 3) chlorine
PLEASE HELP!!!
i mean which cant form hydrogen bond
Answer:
Chlorine
Explanation:
Even though chlorine is highly electronegative, the best answer is no, and in this class we will consider chlorine not to form hydrogen bonds (even though it has the same electronegativity as oxygen). This is because chlorine is large and its lone electron is in a diffuse orbital, covering a large area, and thus do not have the high charge density to act as a strong hydrogen bond acceptor. But it does form weak hydrogen bonds in solid crystalline hydrogen chloride at very low temperatures.
PLEASE HELP! THIS A TIMED QUIZ!!
Scientists found an artifact that has 25% of Carbon-14 left. Based on how much Carbon-14 is remaining, how old is the artifact that was found?
A). 17,100 years
B). 5,700 years
C). 22,800 years
D). 11,400 years
Answer: D
Explanation:
Determine the possible traits of the calves if:
A red bull (RR) is mated to a red (RR) cow 1
Answer:
A red (RR) bullis mated with white (WW) cow 1
Answer:
A roan (RW) is mated with red(RR)cow 3
Answer:
Answer:
1. All red calves i.e. RR
2. All roan calves i.e RW
3. 2 red calves (RR) and two roan calves (RW)
Explanation:
According to this question, a gene coding for fur colour in cattle is involved. Red alleles (R) and white alleles (W) are co-dominant to produce a roan cattle (RW). The possible traits of the following crosses are (see attached punnet square):
1) A red bull (RR) is mated to a red (RR) cow: All red calves i.e. RR
2) A red (RR) bullis mated with white (WW) cow: All roan calves i.e RW
3) A roan bull (RW) is mated with red (RR) cow: 2 red calves (RR) and two roan calves (RW).
The lowest allowable energy state of an atom is called its .
During free fall which object would have a greater acceleration, an object with a mass of 240 kg or an object with a mass of 10 kg? Explain your answer.
Answer:
Leroy Jeakins
Explanation:
Catus jack f me in the asss
How many atoms are in this compound?
C4H10N5O5
Answer:
24 atoms
Explanation:
4+10+5+5
Barry purchased a whole life insurance policy. Which of the following choices is true?
Answer:
where the following choices??
Explanation:
simply parmanent tissue real life application please help it's for my project
What is 13.48cm+7.6cm rounded to the correct number of significant figures?
Suzanne has a cat and uses a pet carrier to take her cat to the veterinarian. After a few years, the cat runs away and hides every time Suzanne gets the carrier out. Which best describes the cat's behavior? instinct reflex conditioned imprinting
Answer:
conditioned
Explanation:
The best term to describe the behavior of the cat is conditioned.
The cat has been conditioned to respond in a specific way to the pet carrier over time due to certain experiences - most likely, unpleasant ones. With repeated unpleasant experience associated with the per carrier, the cat has been conditioned to dislike/fear the pet carrier and thus, the recorded behavior.
Answer:
conditioned
Explanation:
Rosa lives in New York City, which has an average altitude of 33 feet. When she is at home, it takes her 10
minutes to cook noodles in boiling water. She decides to go on a camping trip to Mount McKinley. Her
campsite is located 11,000 feet above sea level. Write the answer to each.
A) Where will the atmospheric pressure be higher: at her home or her campsite?
B) Where will the boiling point be higher?
C) Will the noodles cook faster, slower, or at the same rate at her campsite than home?
Answer:
Home
Home
Slower
Explanation:
A liquid starts changing its phase to gas when the two pressures become the same i.e., vapor and atmospheric.
At a higher altitude the atmospheric pressure lowers so little amount of heat is required for the vapor pressure of water to equalize with the atmospheric pressure at a higher altitude.
The pressure at the Rosa's home will be higher and lower in the campsite.
The boiling point will be higher at her home.
As the boiling point is lower in the campsite the water used in cooking noodles will evaporate faster this may lead to the noodles being under cooked. The water may evaporate before the noodles have cooked. So, the noodles will cook at a slower rate at the campsite and faster in her home.
A. The atmospheric pressure at Rosa's home is higher than her campsite.
B. The boiling point of water at Rosa's home is higher.
C. The noodles will be cooked faster at Rosa's home compared to at the campsite
A. The pressure has been the force that has been exerted by the molecules against each other, The higher altitude has lesser air molecules, which resulted in the lower pressure.
Since the pressure at 33 feet has been higher as than the pressure at 11,000 feet altitude, the atmospheric pressure at Rosa's home is higher than her campsite.
B. The boiling point has been the temperature at which liquids have been converted to gases. With the decrease in atmospheric pressure, there has been a lowering in the boiling point as well.
The atmospheric pressure at Rosa's home is higher compared to her campsite. Thus, the boiling point of water at Rosa's home is higher.
C. The lower atmospheric pressure at the campsite has been responsible for the lower boiling point of the temperature, This implies that water has converted to steam at lower temperatures. The lower temperature of water requires more time for the noodles to be cooked.
Thus, the noodles will be cooked faster at Rosa's home compared to at the campsite.
For more information about the atmospheric pressure, refer to the link:
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HELP PLEASE ANSWER ASAP!!!!!
When atoms react, they often lose, gain, or share electrons to form a more stable version of themselves. For example, alkali metals such as sodium (Na) lose their outer shell electron in their reactions to form compounds. The electron configuration of alkali metals would then resemble those of which group of the periodic table in the compounds they form?
a. 7A or group 17
b. 8A or group 18
c. 2A or group 2
d. 1A or group 1
Answer:
D
Explanation:
Here is a model of the sun earth system at a certain point in earths orbit around the sun based on the model which statement best explains my point is is experiencing summer
Answer:
the earth is tilted towards the sun
Explanation:
In the context, there is a sun and earth system and at a certain point when the earth is moving in its orbit around he sun, some point on the earth experiences the summers season. This is because at this point of the earths revolution, the point on the earth is facing the sun and is also tilted towards the sun. So at this point the sun rays fall directly at the surface. While the place which is tilted away from the sun, experiences winter season.
Answer:
Earth's northern hemisphere is tilted toward the Sun.
state the iupac name for CH₃(CH2)₃C(CH₃)₃
Answer:
CH3CH2COCl consists of three carbon atoms in the parent chain and chloroformyl group(-COCl). Therefore the name of the compound is Propanoyl chloride.
A 100g of sample of a compound is combusted in excess oxygen and the products are 2.492g of CO2 and 0.6495 of H2O. Determine the empirical formula of the compound?
The empirical formula : C₁₁O₁₄O₃
Further explanationThe assumption of the compound consists of C, H, and O
mass of C in CO₂ =
[tex]\tt \dfrac{12}{44}\times 2.492=0.680~g[/tex]
mass of H in H₂O =
[tex]\tt \dfrac{2.1}{18}\times 0.6495=0.072~g[/tex]
mass of O :
mass sample-(mass C + mass H)
[tex]\tt 1-(0.68+0.072)=0.248`g[/tex]
mol of C :
[tex]\tt \dfrac{0.68}{12}=0.056[/tex]
mol of H :
[tex]\tt \dfrac{0.072}{1}=0.072[/tex]
mol of O :
[tex]\tt \dfrac{0.248}{16}=0.0155[/tex]
divide by 0.0155(the lowest ratio)
C : H : O ⇒
[tex]\tt \dfrac{0.056}{0.0155}\div \dfrac{0.072}{0.0155}\div \dfrac{0.0155}{0.0155}=3.6\div 4.6\div 1\\\\\dfrac{11}{3}\div \dfrac{14}{3}\div \dfrac{3}{3}=11:14:3[/tex]
Ammonia is formed from the reaction of nitrogen and hydrogen according to the equation:
N2(g) + 3H2(g) 2NH3(g)
What is the maximum number of moles of ammonia that can be formed from the reaction of 27 moles of hydrogen?
A
41
B
27
18
D
9
Answer:
18 mol NH₃
General Formulas and Concepts:
Chemistry - Stoichiometry
Using Dimensional AnalysisExplanation:
Step 1: Define
RxN: N₂ (g) + 3H₂ (g) → 2NH₃ (g)
Given: 27 moles H₂
Step 2: Stoichiometry
[tex]27 \ mol \ H_2(\frac{2 \ mol \ NH_3}{3 \ mol \ H_2} )[/tex] = 18 mol NH₃
Step 3: Check
We are given 2 sig figs.
Since our final answer is in 2 sig figs, we do not need to round.
Calculate the speed for a car that went a distance of 150 kilometers in 2 hours time. btw this is science
Answer:
The speed of the car is 75 km per hour
Explanation:
Speed is distance over time so 150 km divided by 2 hours is 75km per hour.
Please mark brainliest!!! Thanks.
Which of the following best describes an Arrhenius acid-base reaction?
Answer:
A. Acid + base = salt + water
Explanation:
correct for a pex
The correct option is (a) Acid + base = salt + water .
Sweden's Svante Arrhenius proposed the concept of acids and bases in 1884 based on the theory of ionization. According to Arrhenius, acids are hydrogen-containing compounds that release H + ions or protons when dissociated in water, and bases are hydroxide compounds that release OH-ions when dissociated in water. Acid + base = salt + water Neutralisation is a reaction between an acid and an alkali that forms a salt and water. Salts are odourless and have a salty taste, and many are soluble in water. Common examples include sodium chloride, potassium iodide, calcium carbonate and copper sulfate. The pH scale is used to measure acidity and alkalinity.Learn more about Neutralisation here https://brainly.com/question/23008798
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I WILL GIVE A LOT OF EXTRA POINTS. PLEASE ANSWER ALL OF THEM
75 for all
Explanation:
Answer:
Explanation: Li= Lithium, Na= Sodium, K= Pottasium, Rb= Rubdium Cs= Cesiuna, Fr= Fransium
6. Energy levels increases as if you move down a group during the number of electrons increases again.
7. A charge with higher and effective nuclear charge makes greater attractions to the electrons, pulling the electrons cloud closer to the nucleus makes it in a smaller atomic radius.
8. Ge= Germanium, He= Helium, O=Oxygen, Barium
How many elements do all the “s” orbital span (go across) in each period?
a) 2
b) 6
c) 10
d) 14
The elements do all the “s” orbital span (go across) in each period is 2. Thus option a is correct.
What are elements?Elements are defined as a pure substance made up of only one sort of atom with the same number of protons in its nucleus.
It can also be defined as the a substance that can't be broken down into anything else.
Sublevels are defined as a quantum theory-defined energy level Sublevels are energies associated with electrons in chemistry.
There are mainly four sublevels
s sublevelp subleveld sublevelf sublevelThus, the elements do all the “s” orbital span (go across) in each period is 2. Thus option a is correct.
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How many molecules of CO2 are contained in 4.40g of CO2
Answer:
6.02 x 10²²molecules
Explanation:
Given parameters:
Mass of CO₂ = 4.4g
Unknown:
Number of molecules in CO₂ = ?
Solution:
To find the number of molecules in the given mass, we have to find the number of moles in the compound first;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of CO₂ = 12 + 2(16) = 44g/mol
Insert the parameters and solve;
Number of moles = [tex]\frac{4.4g}{44g/mol}[/tex] = 0.1mol
1 mole of a substance contains 6.02 x 10²³molecules
0.1 mole of CO₂ will contain 0.1 x 6.02 x 10²³molecules
= 6.02 x 10²²molecules
help me please I really need it
a) Magnesium, 2.8.2, Group number 2,Metals, They are not non metals.
b) Fluorine, 2.2.5, Group number7, Metal No, Non-Metal yes
c) Carbon, 2,2,2. Group number 4, Metal No, Non-Metal yes
_____________________________________Best Regards,'Borz'Which chemical family below would the element iodine most likely belong to?
The chemical family that the element iodine should belong to is halogen.
The following information related to the halogen is:
It is the subset that has chemical elements i.e. reactive. It is in Group 17 on the periodic table that should be existed in the environment as the compounds instead of the pure elements.The other type of halogens should consist of fluorine (F), chlorine (Cl), etc.Therefore we can conclude that the chemical family that the element iodine should belong to is halogen.
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How many elements are in H
a) 3
b) 2
c) 1
d) 5
Answer: C (1)
Explanation:
H is only the element hydrogen.
what is the chem formula for chromium (V) chloride?
For an object to remain at rest which of the following statements must be true
Answer:
An object that is at rest will stay at rest unless a force acts upon it. An object that is in motion will not change its velocity unless a force acts upon it. This is known as uniform motion. An object continues to do whatever it happens to be doing unless a force is exerted upon it.
Explanation: NEWTONS laws of motion