What is the conversion of 85.0kg
Answers
Answer:
85
Explanation:
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10g of hyrogen react with excess of oxygen gas according to the equation:2H2+O2---->2H2Owhat is the reacted volume of oxygen gas at STP and the mass of the produced water vapour in this reaction ?
According to the graph, what is the name for the change in water temperature that occurs at approximately 1300 m? A. halocline B. thermocline C. isocline D. baryocline
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O A. lonic
B. Metallic
OC. Macromolecular
D. Chemical
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The correct answer is option B. Metallic.
What explains the structure of metals and delocalized electrons?
Metal is composed of a huge structure of atoms arranged in a regular pattern. Electrons from the outer shell of a metal atom are delocalized and can move freely throughout the structure. This sharing of delocalized electrons results in strong metal bonds.
Metallic bonds are electrostatic attraction between metal cations and the negatively charged ocean of delocalized electrons. The sea of delocalized electrons contains only valence electrons, not core electrons.
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B.metallic is the answer hope this helped
Answers
9.75 x 10^5
A number in scientific notation has the form a x 10^b where
• a is the coefficient
• b is the exponent
Here are the steps to convert a number greater than 1 to scientific notation.
a) Find the coefficient
Put the decimal point after the first digit and drop the trailing zeroes
9.75 000
The coefficient is 9.75.
b) Find the exponent
Count the number of digits after the first digit.
In 975 000 there are five digits after the 9. Therefore, the exponent is 5.
c) Write the number
We write 975 000 as 9.75 x 10^5.
B)2,1,1,2
C)3,2,1,4
D)1,2,2,1
Answers
The numbers to be added to the blanks to balance this chemical equation are 2, 1 , 1 and 2
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
Thus in the reactants, there are 2 atoms of hydrogen , 1 atom of oxygen and 4 atoms of flourine.Thus there will be atoms of hydrogen , 1 atom of oxygen and 4 atoms of flourine in the product as well.
Learn more about conservation of mass
B) the hypothesis is tested extensively and competing hypothesis are eliminated
C) there are no other competing hypothesis
D) the hypothesis can be tested at least once
2) A preliminary untested explanation that tries to explain how or why things happen in the manner observed is a scientific ________.
A) law
B) theory
C) fact
D) hypothesis
Answers
1) The answer is: B) the hypothesis is tested extensively and competing hypothesis are eliminated.
Theory is a tested, unifying explanation for a set of verified facts.
Theory is a system of explanations that ties together a lot of facts.
Steps of the scientific method:
1) ask a question about something that is observed.
2) do background research.
3) construct a hypothesis, an attempt to answer questions with an explanation that can be tested.
4) test of hypothesis.
5) analyze collected data and draw a conclusion.
2) The answer is: D) hypothesis.
Hypothesis is a suggested explanation for an observable phenomenon.
Experimenters may test and reject several hypotheses before solving the problem.
A working hypothesis is provisionally accepted as a basis for further research.
A law in science is a generalized rule to explain a body of observations in the form of a verbal or mathematical statement.
2) This is a hypothesis. A theory is basically almost an established truth, which can still be changed with new data, but which as far as we know is true.
Answers
Answer:
The rate of reaction increases to counter the action of removing heat.
Explanation:
- The reaction between zinc and hydrogen chloride produces zinc chloride, hydrogen gas, and heat.
- The reaction is exothermic reaction. Heat is produced in the reaction.
- It means the temperature of system increase when reaction proceeds. When heat is removed from system, it stimulates the reaction to fast to produce more heat.
- Due to fast reaction rate of reaction increases.