CHEMISTRY HIGH SCHOOL

The isotope 65Cu2+ has how many electrons and how many protons?

Answers

Answer 1

Answer:

The isotope $^(65)_(29)Cu^(2+)$ has 27 electrons and 29 protons.

Given:

The isotope of copper with +2 charge and mass number of 65.

To find:

The number of electrons and protons in the given isotope.

Solution

The atomic number of copper = 29

Atomic number = Number of protons

Number of protons in copper atom = 29

Number of electrons in copper atom = 29

The isotope of copper= $^(65)_(29)Cu^(2+)$

(A neutral atom has equal number of protons and electrons)

The number of protons in isotope and in parent atom remains same.

Number of proton in $^(65)_(29)Cu^(2+)$ = 29

Charge on the given copper's isotope ( $^(65)_(29)Cu^(2+)$ ) = +2

Number of electrons $^(65)_(29)Cu^(2+)$ :

= 29 - 2 = 27

(+2 charge indicates lessor two electrons out of total electrons)

The isotope $^(65)_(29)Cu^(2+)$ has 27 electrons and 29 protons.

Learn more about isotopes and atom here:

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Answer 2

Answer:

29p,36n,27e

i think is the answer

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Give the formula for the alkane containing 100 hydrogens.
An atom that has 13 protons and 15 neutrons is isotope of the elementa. nickelb. siliconc. aluminumd. phosphorus. Why?
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What is the process that is responsible for the effect that the salt water has on plants?

In the same science fair,Tina ask the question "does caffeine increase the heart rate of an earthworm?" In test 1,she measures the heart rate by looking at the earthworm under a microscopes, the heart rate if 50 beats per minute. In test 2,she places a few drops of caffeine on the earthworms skin and measures the rate again.in this test the heart rate is 68beats per minuteWhat is the independent variable in this experiment
What is the dependent variable in this experiment
Tina's experiment should have included a hypothisis .in a complete sentence,suggest a hypothesis for Tina's experiment

Answers

The independent variable is the one that does not change depending on other variables - so here it would be the presence or the absence of caffeine - this is dependent on Tina's actions, but not on other variables in the experiment. The dependent variable is the heart rate - it is assumed to depend on the presence or absence of caffeine. A hypothesis could be that "Caffeine causes an increase of heart rate in earthworms" - and this hypothesis is what the experiment is testing.

How does the number of products in a synthesis reaction compare with the number of reactants? A) the number of products is greater than the number of reactants
B) the number of products is less that the number of reactants
C) the number of products is the same as the number of reactants
D) the number of products may be greater or less than the number of reactants

Answers

Answer: The correct answer is Option B.

Explanation:

Synthesis reaction is defined as the reaction in which two or more substances combine in their elemental state to form a single compound.

The general equation representing this reaction follows:

$A+B\rightarrow AB$

As, number of reactants in this type of reaction will always be more bacuse a single product is forming in this reaction.

Thus, the correct answer is Option B.

The balanced chemical equation for the combustion of butane is: 2C2H2 + 5O2 CO2 + 2H2O 2CH4 + 5O2 2CO2 + 4H2O 2C4H10 + 13O2 8CO2 + 10H2O C4H10 + 12O2 4CO2 + 5H2O

Answers

Butane is C₄H₁₀.

$C_4H_(10) + O_2 \to CO_2 + H_2O \n \n\hbox{balance carbon and hydrogen on the right-hand side:} \nC_4 H_(10) + O_2 \to 4 \ CO_2 + 5 \ H_2O \n \n\hbox{balance oxygen on the left-hand side:} \nC_4 H_(10) + (13)/(2) \ O_2 \to 4 \ CO_2 + 5 \ H_2O \n \n\hbox{multiply by 2 to get rid of the fraction:} \n2 \ C_4H_(10) + 13 \ O_2 \to 8 \ CO_2 + 10 \ H_2O$

The balanced equation is 2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O.

The balanced chemical equation for the combustion of butane is:

2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O. Therefore, option C is correct.

This equation represents the combustion of butane in the presence of oxygen to produce carbon dioxide and water.

The equation shows that 2 molecules of butane react with 13 molecules of oxygen gas. On the left side of the equation, we have a total of 8 carbon atoms and 20 hydrogen atoms.

On the right side of the equation, 8 molecules of carbon dioxide (each with 1 carbon atom) and 10 molecules of water (each with 2 hydrogen atoms).

To learn more about the balanced chemical equation, follow the link:

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#SPJ6

Which one is it? Please help

Answers

Chemical properties can only be tested if you change the substance

Answer:

Chemical properties can be tested without changing the substance

Explanation:

A chemical manufacturer sells sulfuric acid in bulk at a price of $100 per unit. If the daily production cost in dollars for x units is: C(x)=100,000+50x+0.0025x^2, and if the daily production capacity is at most 7000 units, how many units of sulfuric acid must be manufactured and sold daily to maximize the profit?

Answers

to solve the amount of sulfuric acid to maximize the profitwe need to establish the profit

let S(x) = 100x the selling price

P = S(x) – C(x)

P = 100x – ( 100,000 + 50x + 0.0025x^2)

P = 50x – 100000 – 0.0025x^2

Getting the first derivative and equating it to 0

0 = 50 – 0.005x

X = 10000 units of sulfuric acid

But the capacity is only 7000 units

So 7000 units should be manufactured

What is the best way to compare a concentrated solution to a dilute solution, given the same volume of solution?The concentrated solution has less solute than the dilute solution.
a) The concentrated solution has the same amount of solute as the dilute solution.
b) The concentrated solution has more solute than the dilute solution.
c) The concentrated solution has a different amount of solute than the dilute solution.
d) The concentrated solution has the same amount of solute as the dilute solution.

Answers

The correct answer is B. Given a same volume of a solution, the concentrated solution has more solute than the dilute solution. For instance, we are given two NaOH solutions having a volume of 1L one has a concentration of 1M and the other is 2M. The latter has more solute since it has 2 moles of NaOH while the other only has 1 mole.

Answer: b) The concentrated solution has more solute than the dilute solution.

Explanation:-

Binary Solution is a homogeneous mixture of two components called as solute and solvent. Solute is the component which is present in smaller proportion and is solid for solid in liquid solution and solvent is the component which is present in larger proportion and is liquid for solid in liquid solution.

Concentrated solution is one in which there is more amount of solid.

Dilute solution is one in which there is more amount of liquid.

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