which element is most likely to have an oxidation number of -2?
A. F
B. NE
C. CA
D. O
Answer:
D. O
_________________________________
F ----------¢ - 1
Ne --------¢ 0
Ca --------¢ + 2
Answer:
D. O
Explanation:
6.(a) State any two ways by which water gets polluted.
(b) Name the components present in water gas.
The molarity of 8 grams of an aqueous solution of sodium hydroxide in 2 liters of solution is what?
Answer: 0.125
Explanation:
8g divided by 39.997. Then divide that answer by 2.
Answer:
0.1 M
Explanation:
Match each term to its correct description
1) Limiting reactant
2) Theoretical yield
3) Excess reactant
a) Reactant that has some leftover at the end of the reaction
b) Reactant that is entirely used up in the reaction
c) Mass of product that can be made by the given masses of reactants
Answer:
C
A
B
Explanation:
Excess reactant: Reactant that has some left over at the end of the reaction
Limiting reactant: Reactant that is entirely used up in the reaction
Theoretical yield: Mass of product that can be made by the given masses of reactants
The terms have been correctly matched to their descriptions as follows:
Limiting reactant: b) Reactant that is entirely used up in the reaction.Theoretical yield: c) Mass of product that can be made by the given masses of reactants.Excess reactant: a) Reactant that has some leftover at the end of the reaction.What is a Reactant?A reactant is a chemical compound or element that participates in a chemical reaction.
The limiting reactant is completely used up after the reaction while the excess reactant is the compound or element that is much more than what is normally required to complete the reaction.
The theoretical yield is the maximum quantity of the product that can be formed by the reactants.
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What do you think is the difference between a scientific theory and law?
Answer:
A scientific theory predicts why something might happen and when more information goes into the theory it can better predict. But a law is something that no matter what will always be true.
Explanation:
in the universe what can mass be defined as
Answer: Mass is both a property of a physical body and a measure of its resistance to ... Inertial mass is the mass of an object measured by its resistance to acceleration. ... back to the fact that we have not really defined what a force is. ... Then we can measure the mass of any other object in the universe ...
where might u find examples of series & parallel circuits in everyday life
Answer: Here are some examples!
Explanation: An example of a series circuit is a string of Christmas lights. If any one of the bulbs is missing or burned out, no current will flow and none of the lights will go on. Parallel circuits are like the smaller blood vessels that branch off from an artery and then connect to a vein to return blood to the heart.
anywhere inside ur house lma.o.
My atomic number is 32. I am a-
Answer:
please mark brainliest!
Explanation:
Germanium is a chemical element with the symbol Ge and atomic number 32. It is a lustrous, hard-brittle, grayish-white metalloid in the carbon group, chemically similar to its group neighbours silicon and tin.
Which is not on a station model? *
precipitation
wind direction
fronts
cloud cover
Which mineral is soft enough to be scratched by a fingernail?
a)
corundum
b)
calcite
c)
talc
d)
topaz
Answer:
Talc
Explanation:
Talc only has a hardness of one on the Moh's scale of hardness. This translates into a very soft material, which results from its layered nature. Naturally, this substance is hydrophobic (dislikes water), and tends not to absorb water, therefore giving some of its favourable water-resistant characteristics.
which one represents an element
Answer:
B
Explanation:
Convert the following number into scientific notation: 88,000,000.
A 8.8 x 10⁶
B. 88 x 10⁴
C 8.8 x10⁷
D. 8.8 x 10-⁷
I think I'm allergic to garlic powder. Tonight I am making pasta and will not use garlic powder this time. If I get itchy or not is what kind of variable?
Answer:
Explanation:
A garlic allergy is rare. If you're allergic to garlic, you can be allergic to cooked or raw garlic, or to all forms. A garlic allergy is caused when your body's immune system mistakenly identifies garlic as being harmful and produces antibodies in an attempt to fight it off. Does this help?
Answer
Dependent
Explanation:
You will react depending on the presence of garlic powder
Barium phosphide Ba3P2 BaP Ba3PO4
Answer:
It A(Ba3P2)
Explanation:
I took the test
Answer:
It A(Ba3P2)
Explanation:
PLS HELP NOW!!
1. List the functions of the respiratory system. - [Answer]
2. Describe the path that a molecule of oxygen takes as it moves from the air into the alveoli. - (Answer)
3. Explain what happens to carbon dioxide in the blood that flows through the capillaries in the alveoli. - [Answer]
4. Why does air rush into your body when you inhale? - (Answer]
5. When there is a lot of dust in the air, people often cough and sneeze Fynliniul
Answer:
1:Gas Exchange – oxygen and carbon dioxide.
Breathing – movement of air.
Sound Production.
Olfactory Assistance – sense of smell.
Protection – from dust and microbes entering body through mucus production, cilia, and coughing.
Explanation:
i neeeed helllllpppppsss
Answer:
1.0 g/cm3
Explanation:
yeah that's the density of water
Answer:
a 1 g/cm3
Explanation:
per google- A common unit of measurement for water's density is agram per milliliter (1 g/ml) or 1 gram per cubic centimeter (1 g/cm3)
Plants use sunlight as energy to convert carbon dioxide and water into glucose and oxygen. Which best describes the
reaction?
O The law of conservation of mass indicates the same amount of carbon will be found in the reactants as in the
products.
O The law of conservation of energy indicates the same amount of carbon will be found in the reactants as in the
products,
The law of conservation of mass indicates the same amount of glucose will be found in the reactants as in the
products.
The law of conservation of energy indicates the same amount of glucose will be found in the reactants as in the
products.
Answer:
A
Explanation:
Question:
Plants use sunlight as energy to convert carbon dioxide and water into glucose and oxygen. Which best describes the reaction?
Options:
The law of conservation of mass indicates the same amount of carbon will be found in the reactants as in the products. The law of conservation of energy indicates the same amount of carbon will be found in the reactants as in the products. The law of conservation of mass indicates the same amount of glucose will be found in the reactants as in the products. The law of conservation of energy indicates the same amount of glucose will be found in the reactants as in the products.Answer:
A.) The law of conservation of mass indicates the same amount of carbon will be found in the reactants as in the products.
Explanation:
I just did the test on edge 2020 and got it right!
what element can scratch a diomand?
Answer:
another diamond ....theres nothing else that can that I know of.
Express the answer to each of the following calculations with the correct number of
significant figures.
a) 3.42 + 8.132
b) 4.9 + 3.822
c) 17.8 + 12.115 d) 4.55 + 3.45
e) 1.966 + 3.4422
f) 3.882 – 2.1
g) 4.894 - 2.03
h) 15.6600 - 12.838
i) 11.22 - 8.8
j)133-20
Answer:
a)11.552
b)8.722
c)29.915
d)8
e)5.4082
f)1.782
g)2.864
h)2.822
i)2.42
j)113
The correct number of significant figures are a.5 b.4 c.5 d.1 e.5 f.4 g.4 h.5 i.3 j.3 for all the calculations.
what are significant figures?Significant figures or digits are the minimum numbers from zero to nine which are used for the report of results that are uncertain and decimal is not a significant figue and starting zeros too.
the total number of significant figures are,
a) 3.42 + 8.132 =11.732 = 5 significant figures.
b) 4.9 + 3.822 = 8.722 = 4 significant figures.
c) 17.8 + 12.115 = 29.915 = 5 significant figures.
d) 4.55 + 3.45 = 8 = 1 significant figures.
e) 1.966 + 3.4422 = 5.4082 = 5 significant figures.
f) 3.882 – 2.1 = 1.722 = 4 significant figures.
g) 4.894 - 2.03 = 2.866 = 4 significant figures.
h) 15.6600 - 12.838 = 2.8262 = 5 significant figures.
i) 11.22 - 8.8 = 2.42 = 3 significant figures.
j)133-20 = 113 = 3 significant figures
Therefore, The correct number of significant figures are a.5 b.4 c.5 d.1 e.5 f.4 g.4 h.5 i.3 j.3 for all the calculations.
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what does it mean when you hear science is tentative?
Answer/Explanation:
Tentative means that something is uncertain. So if some aspect of science is described as "tentative" it probably means that there is some evidence to support a hypothesis, but there is more work to be done to be sure about the statements being made.
You may also see these reports described as "preliminary", as they are acknowledging the work is not complete
Which of the following forces weathers objects by expanding and changing shape?
Moving water
Wind
Plants
Ice
How can environmental pollution occur when using cosmetics that contain environmental pollution?
Can the normal usual cosmetics products make nature harmed and affect climate changes as well?
Answer:
When cosmetics companies use chemicals to make their products, they could dump their waste into rivers and oceans, causing water pollution to occur. The wildlife that lives in these habitats will probably die from them, causing some species to die out and become extinct.
Explanation:
Also, greenhouse gases could be released into the atmosphere, which would cause global warming.
electron configuration of P
What is an ORGANELLE And put a sentence that supports it
#STAY POSTED IM PUTTING SOME OTHER QUESTIONS UP SOON
~ Hello! Here's your answer! ~
[tex]\boxed{-See\;Below-}[/tex]
___________________________________________________________
An organelle is any of a number of organized or specialized structures within a living cell.
|
Sentence \/
"There must be at least 100 organelles in this living cell!"
____________________________________________________________
Hope i helped!
May I have brainliest?
[tex]\huge\boxed{Thanks,Plip.}[/tex]
Which element has a greater atomic radius? Fluorine or Potassium
Answer:
An atom is a basic unit of a chemical element, such as hydrogen, helium ... a fluorine atom since the three additional protons the fluorine has will pull its ... As an example, potassium (K) has a larger average atomic radius (
Which is one precaution to take when working with heat and fire?
Do not use during experiments.
Keep flammables away.
Avoid touching face and eyes.
Do not mix chemicals unless told to do so.
A 300 kg computer cart accelerates at a rate of 5 m/s^2. What force is required to produce this acceleration?
Answer:
The answer is 1500 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × accelerationFrom the question we have
force = 300 × 5
We have the final answer as
1500 NHope this helps you
Placing a sample of iron (II) oxide into a graduated cylinder makes the water volume increase 12.0 ml. The weight of the sample is 76.6g. What is it’s density? (Round to the nearest hundredths)
Answer:
The answer is 6.83 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 iron (II) oxide = 76.6 g
volume = 12 mL
We have
[tex]density = \frac{76.6}{12} \\ = 6.3833333...[/tex]
We have the final answer as
6.83 g/mL to the nearest hundredthHope this helps you
Answer:
it 76.6
Explanation:
cause it is what it is
Which is responsible for an atom’s identity?
A.Protons
b.Electrons
c.Neutrons
d.Valence electrons
To make a saturated solution, 30 g of sodium chloride is dissolved in 100 g of
water at 293 K. Find its concentration at this temperature.
Answer:
30%
Explanation:
As the formula for finding concentration
= (mass of solute/mass of solution)×100
= (30/100)×100
= 0.3×100
= 30%
The concentration is 30%.
How to find concentration?As the formula for finding concentration
= (mass of solute/mass of solution)×100
= (30/100)×100
= 0.3×100
= 30%
What is a concentration?
The amount of a substance, such as salt, is in a positive amount of tissue or liquid, along with blood. A substance turns into more concentrated whilst much less water is present.
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