increasing the area of contact
Answer:
D
Explanation:
Reducing the time of their contact
What are the signs of a chemical reaction?
A. Color change and gas released
B. Color, Gas, Explosion, Smoke,
Precipitate
C. Color, Gas, Light, Temperature, Precipitate
Answer:
C
Explanation:
Because i just had to do this on my assignment and got 100
Answer:
hey , its option c because in chemical reaction colour + evolution of gas takes place + temp. + precipitation. but also light can come in the case of chemical reaction.
Positive oxidation number suggest the element wants to ____ (gain/lose) electron
Answer:
lose electron
Explanation:
If the oxidation number is positive, this means that the atom loss electrons.
Losing electrons makes the atom lose some of its negative charge and become more positively charged.
Hope that helps.
The Mississippi River carries tons of tiny rock fragments called sediments into the Gulf of Mexico. What do you think will happen to these sediments after a few million years?
Answer:build up
Explanation:
Answer:
The sediments will be transformed into rock.
Explanation:
Hope this helps, Good Luck, let me know if i am wrong, and Brainliest?
Can someone please help and list what each type of thing they are? (Element, Compound, Mixture of elements, Mixture of compounds, Mixture of elements and compounds)
Which cellular process produces simple sugars?
A. mitosis
B. photosynthesis
C. respiration
D. waste elimination
Answer:
The answer is C. Hope this helps you out!
Answer:
C. Respiration
✂---------------
1. Using what you know about the of molecules in a liquid, explain alcohol moves down a cooled thermometer.
2. The animation shows that the molecules spread out slightly when heated. Do you think the thermometer would work as well if the tube of red liquid were wider? Why or why not? Use evidence to support your answer.
Answer:
oss sees djjekejjddhiwiwjjxbuekes
Fields allow some objects to exert forces on each other even when they are not ________.
Answer:
in contact
Explanation:
Fields allow some objects to exert force on each other even when they are not contact with one another.
The region of space where the effect of a force is felt is know as a field.
Field forces for provides a non-contact means of exerting forces. They objects do not have to be in contact before the force is felt. An example is the gravitational force field.Fields allow some objects to exert forces on each other even when they are not in contact .
How many total oxygen atoms are in 2Ba(NO3)2
Answer:
6
Explanation:
What number should be placed
in the blank in order for this
equation to follow the Law of
Conservation of Mass?
57g + ? ---→ 34g +10g 26g
Answer:
13g
Explanation:
34+10+26=70
70-57=13
13g would complete the equation
Animals and humans obtain the energy they need from what?
A. food
B. water
C. carbon dioxide
D. photosynthesis
Answer:
A. Food
Explanation:
Water alone does not give energy, Carbon Dioxide cannot be consumed healthily, and photosynthesis is for plants.
Is it possible that material from this sedimentary rock could ever form igneous rock
Answer:
Yes
Explanation:
It can melt into liquid rock and form igneous rock.
Answer:
Yes, the sedimentary rock can change into igneous rock by undergoing melting and then solidifying.
Explanation:
10. Write the formula for the compounds: copper (1) chloride and copper (II) chloride
Answer:
Copper(II) chloride (CuCl2) reacts with several metals to produce copper metal or copper(I) chloride (CuCl) with oxidation of the other metal.
Explanation:
There are two types of chemical compound one is covalent compound and other is ionic compound. The formula for the compounds: copper(I) chloride and copper (II) chloride are CuCl and CuCl[tex]_2[/tex] respectively.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion. Covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron.
The chemical formula for Copper(II) chloride is (CuCl[tex]_2[/tex]). The chemical formula for copper(I) chloride (CuCl). The number in the roman is the oxidation state of the metal. Copper(II) is called cupric, copper(I) is called cuprous.
Therefore, the formula for the compounds: copper(I) chloride and copper (II) chloride are CuCl and CuCl[tex]_2[/tex] respectively.
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Plz help hurry! I will give brainlest
Answer: mitochondria
Explanation:
it affects the cell because it produces the power of the cell, let me know if this helpes
Can somebody plz help answer all of these questions right it’s very important. If u can that will be amazing thanks!
WILL MARK BRAINLIEST WHOEVER ANSWERS FIRST :DDD
Answer:
1. Mechanical energy
2. Heat/thermal energy
3. Electrical energy
4. Heat energy
5. Electrical energy
Explanation:
Hope this helped!
which option is an element air, sodium chloride, oxygen,water
Answer:
oxygen
Explanation:
air is a way of saying oxygen but it isn't direct, sodium chloride is a combination of two different elements but isn't one element, and water is H2O but that isn't an element on the periodic table. The only real element that is on the periodic table is oxygen.
Answer:
oxygen
Explanation:
i took the test
A chemical equation can be used to solve stoichiometry problems provided that it....
indicates only the forward reaction and not the reverse.
indicates that reactants are in the gas phase and are not solids or liquids.
includes the coefficients that are needed for balancing the equation.
includes the state of matter after each substance.
Answer:
includes the coefficients that are needed for balancing the equation.
Explanation:
A chemical equation can be used to solve stoichiometry problems provided that it includes the coefficients that are needed for balancing the equation.Hence, Option (C) is Correct.
What is Balanced Equation ?
An equation that has an equal number of atoms of each element on both sides of the equation is called a balanced chemical equation, i.e., the mass of the reactants is equal to the mass of the products.
Therefore, A chemical equation can be used to solve stoichiometry problems provided that it includes the coefficients that are needed for balancing the equation.Hence, Option (C) is Correct.
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Silver is mainly recovered as a byproduct of the bulk mining of other metals such as copper, lead, zinc and gold. Where in the United States do you think silver recovery would happen?
Answer:
Explanation:
This question appear incomplete because of the absence of options. However, places where silver recovery would happen in the United States are states where huge mining of copper, lead, zinc or gold are been mined. Examples of such places include Arizona, California and Oregon; where copper (and some other metals in some cases like gold in Oregon) is heavily mined and silver is recovered as a byproduct.
What would happen to a plant if you grew it in a room without cabon dioxide
Answer:
One of the byproducts of respiration is CO2, this is the opposite of photosynthesis. It is not unusual for plants to stop taking in carbon dioxide to uptake small amounts of oxygen at night. In the event that plants cease to take up CO2 all together, they will cease to convert sunlight into carbohydrates, and die.17/01/2019
Explanation:
i need help please will give brainliest
Answer:
1) Least reactive 2) Halogens 3) Nonmetals
Explanation:
Which of the following is true about an atom of iron and an atom of copper?
They have different masses.
Both have the same properties.
They have an equal number of protons.
Both have different types of sub-atomic particles.
Answer:
They have different mass and Both have different types of sub-atomic partials
Explanation:
Answer:
D: They have different mass and Both have different types of sub-atomic partials
Explanation:
The energy of a pendulum is recorded at different positions in the table below. Use the data in the table to determine the amount of kinetic energy the pendulum had at Position 2.
Answer:
46.5 J
Explanation:
I did it in stemscopes.
Determine the energy in joules of a photon whose frequency is 3.75 x 1017 Hz.
Plz help my grade and life depend on it
Answer:
The energy of photon is 24.86×10⁻¹⁷ J
Explanation:
Given data:
Frequency of photon = 3.75×10¹⁷ Hz
Energy of photon = ?
Solution:
Formula:
E = hf
h = planck's constant = 6.63×10⁻³⁴ Js
Now we will put the values in formula.
E = 6.63×10⁻³⁴ Js × 3.75×10¹⁷ Hz
Hz = s⁻¹
E = 24.86×10⁻¹⁷ J
Thus, the energy of photon is 24.86×10⁻¹⁷ J
I need help pleases and can you explain
Answer:butterflies
Explanation:
Nah man you are on your own.
Does this equation follow the laws of conservation of mass? why?
CuO(s) + H2(g) = Cu(s) + H2O(g)
(twos are subscript_)
Answer:
Yes
Explanation:
Chemical equation:
CuO + H₂ → Cu + H₂O
Law of conservation of mass:
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
This law was given by French chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
For example:
In given reaction:
CuO + H₂ → Cu + H₂O
there are 1 copper atoms, one oxygen atoms and two hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.
How many formula units are in 9.3 g of alumina (Al2O3)?
Answer in units of formula units.
Answer:
5.5 × 10²² formula units Al₂O₃
General Formulas and Concepts:
Chemistry - Stoichiometry
Reading a Periodic TableDimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:
Step 1: Define
9.3 g Al₂O₃
Step 2: Define conversions
Avogadro's Number
Molar Mass of Al - 26.98 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of Al₂O₃ - 2(26.98) + 3(16.00) = 101.96 g/mol
Step 3: Convert
[tex]9.3 \ g \ Al_2O_3(\frac{1 \ mol \ Al_2O_3}{101.96 \ g \ Al_2O_3} )(\frac{6.022 \cdot 10^{23} \ formula \ units \ Al_2O_3}{1 \ mol \ Al_2O_3} )[/tex] = 5.4928 × 10²² formula units Al₂O₃
Step 4: Check
We are given 2 sig figs. Follow sig fig rules.
5.4928 × 10²² formula units Al₂O₃ ≈ 5.5 × 10²² formula units Al₂O₃
How many inner transition metals are there?
Answer: 28 inner transition elements
Okay so I am working on polyatomic ions and need help what is the name of this element KCH3COO
Answer:
its potassium acetate
Explanation:
.............................
Which area of the atom
contains the most mass, but
the least volume?
Answer:
It is nucleus.
Explanation:
As you see in pic in center you see protons and neutrons. And electrons are surrounding them.
The mass of proton and neutron us close together but electron has the less mass.
Which sample is a pure substance? zinc oxide sugar dissolved in water pond water soil
Answer:
Its (A) zinc oxide
Explanation:
just took the quiz
Among the given option, Zinc Oxide is a Pure substance.
What is Pure Substance ?A substance that has a fixed chemical composition throughout is called a pure substance such as water, air, and nitrogen.
A pure substance does not have to be of a single element or compound.
Hence, Among the given option, Zinc Oxide is a Pure substance.
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Need Help ! ASAP !! Please
Answer:
Option 1.
Explanation:
3.6cm * 1inch/2.54 cm = 1.417 inch