Please help me on Q2
I’ll be so incredibly grateful!!

Please Help Me On Q2 Ill Be So Incredibly Grateful!!

Answers

Answer 1

Answer:

No. of neutrons = 27 - 13 = 14

No. of protons = No. of electrons = 13

Hope it helps you


Related Questions

Driving automobiles and burning coal for electricity are examples of two human activities that negatively impact _______.

Answers

Answer:

I think its pollution?

Write the chemical formula for each binary ionic compound
Number 8 please
A
B
C
D
E
F

Answers

Answer:

A. K2S

B. Li2Se

C. ZnO

D. RbBr

E. Cs2S

F. Sr3N2

Explanation:

How do we balance Zn + HNO3 Zn(NO3)2 + NO + H20​

Answers

3Zn + 8HNO₃⇒ 3Zn(NO₃)₂ + 2NO + 4H₂O

Further explanation

Equalization of chemical reaction equations can be done using variables. Steps in equalizing the reaction equation:  

1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c etc.  2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index between reactant and product  3. Select the coefficient of the substance with the most complex chemical formula equal to 1  

For gas combustion reaction which is a reaction of hydrocarbons with oxygen produces CO₂ and H₂O (water vapor). can use steps:  

Balancing C atoms, H and the last O atoms

Reaction

Zn + HNO₃⇒ Zn(NO₃)₂ + NO + H₂O

1. gives a coefficient

aZn + bHNO₃⇒ Zn(NO₃)₂ + cNO + dH₂O

2. make an equation

Zn : left = a, right =1 ⇒a=1

H : left = b, right = 2d⇒ b=2d (eq 1)

N : left = b, right = 2+c⇒b=2+c (eq 2)

O : left = 3b, right = 6+c+d ⇒3b=6+c+d(eq 3)

From eq 1 and eq 3

3(2d)=6+c+d

6d=6+c+d

5d=6+c (eq 4)

From eq 2 and eq 3

3(2+c)=6+c+d

6+3c=6+c+d

2c=d (eq 5)

From eq 4 and eq 5

5(2c)=6+c

10c=6+c

9c=6

c = 2/3

input eq 5

d = 2 x 2/3

d = 4/3

input eq 1

b = 2 x 4/3

b = 8/3

The equation

aZn + bHNO₃⇒ Zn(NO₃)₂ + cNO + dH₂O to

Zn + 8/3HNO₃⇒ Zn(NO₃)₂ + 2/3NO + 4/3H₂O x 3

3Zn + 8HNO₃⇒ 3Zn(NO₃)₂ + 2NO + 4H₂O

what type of energy is a orange being crushed

Answers

Chemical energy? I’m not completely sure

Answer:

Orange juice

Explanation:

which electrons are the valence of electrons of the atom?

Answers

Answer:

Valence electrons are the electrons in the outermost shell, or energy level, of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell.

what is a covalent bond? Apex

Answers

Answer:

Here is the meaning of covalent bond: covalent bond: a chemical bond in which two atoms share some of their valence electrons which creates a force that holds the atoms together

Hope this helps

Sky

A chemical bond in which two atoms share some of their valence electrons creates a force that holds the atoms together.

What is a covalent bond?

A covalent bond consists of the mutual sharing of one or more pairs of electrons between two atoms.

Covalent bonds have high bond dissociation energy as compared to the ionic bond. The overlapping of molecular orbital is bigger in the case of the covalent bonds as compared with ionic bonds.

Hence, covalent bonds are difficult to break and stronger than ionic bonds.

Learn more about covalent bond here:

https://brainly.com/question/12663276

#SPJ2

3. Which of the following is used to calculate the average atomic mass of an element?

Answers

I believe the answer is B the total number of naturally occurring isotopes. :)

Homer notices that his shower is covered in a strange green slime. His friend Barney tells him that coconut juice will get rid of the green slime. Homer decides to check this out by spraying half of the shower with coconut juice. He sprays the other half of the shower with water. After 3 days of "treatment" there is no change in the appearance of the green

Answers

Answer:

This strange green slime is a colonization of fungi caused by the humidity of the bathrooms, which to be eradicated requires a non-specific antimicrobial such as sodium hypochlorite that generates an osmotic imbalance producing a fungicidal effect.

Explanation:

The fungi that appear in the form of slime at the microscopic level have many forms of colonization, by adding coconut milk it was assumed that this would generate an environment not suitable for their metabolism and reproduction but this did not happen, therefore they continued their reproduction.

Answer:

Explain?

Explanation:

give IUPAC name

CH
|
CH
|
CH3 - CH2 - C = CH-CH2 - CH3​

Answers

Answer:

The IUPAC name of the given compound is Pent-1-ene.

Explanation:

Longest chain has 5 carbons and the double bond is at C-1 carbon

Why MgO will form after Mg reacting with CuO? (mcq)
Mg forms positive ions and O forms negative ions
Mg is more reactive than Cu
CuO have loose bonding

Answers

Answer:

Mg is more reactive than Cu

Explanation:

In the reaction between Mg and CuO to form MgO, MgO will form because Mg is more reactive than Cu.

This kind of reaction is called a single replacement or single displacement reaction.

The replacement of a metallic ion in solution by a metal atom higher in the activity series than the metal in solution falls into this category of reactions. The element Mg is higher than Cu in the activity series. The higher an element is in the activity series, the more reactive they are. Since Mg is more reactive, it will displace the Cu from CuO.

3.58 x 1023 molecules of propane C8H8 would occupy how much space at STP

Answers

Answer: At STP, a mole of gas takes up 22.4 Liters. The 22.4 Liters/mole quantity can be derived from the Ideal Gas Law, PV = nRT, plugging in STP conditions for P and T, and solving for V/n, which gets 22.4 Liters/mole.

Explanation:


The density of an object is 7.3 g/mL and the volume is 0.94
mL. What is the mass of the object?

Answers

Answer:

The answer is 6.86 g

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question

volume = 0.94 mL

density = 7.3 g/mL

We have

mass = 7.3 × 0.94 = 6.862

We have the final answer as

6.86 g

Hope this helps you

6. A sheet of metal is 2 cm wide, 10 cm tall, and 15 cm long. It was 4 grams. What is the
density?

Answers

Answer:

0.013g/cm^3

Explanation:

density= mass÷volume

Answer:

0.01(3) g/cm3 (cm3 means centimeter cubed, (3) means the 3 goes on forever)

Explanation:

The volume of the sheet is 300 cm3, and dividing 4 grams by 300 cm3 gets you 0.01(3) g/cm3. Hope it helps!

in atmosphere water is solute give reason​

Answers

Answer:

water vapour is there

Explanation:

thats all i know

Given: (52.6 cm)(1.214 cm)
What is the product expressed to the correct number of significant figures?
1.
64 cm2
2.
63.9 cm2
3.
63.86 cm2
4.
63.8564 cm2

Answers

Answer:

2.

63.9 cm2

Explanation:

All non-zero digits are consider significant figures like 1, 2, 3, 4, 5, 6, 7, 8, 9.

Leading zeros are not consider as a significant figures. e.g. 0.06 in this number only one significant figure present which is 6.

Zero between the non zero digits are consider significant like 108 consist of three significant figures.

The zeros at the right side e.g 240000 are also significant. There are six significant figures are present.

When we add or subtract the values the number of significant figures after decimal in result must be equal to the given measurement having less number of decimal places.  For example,

The difference between 7.69 and 4.0.

7.69 - 4.0 = 3.7

When we multiply or divide the values the number of significant figures must be equal to the less number of significant figures in given value.

For example in given q:

52.6 cm × 1.214 cm = 63.9 cm²

Se ha añadido un evaporador para una alimentación de 11500 kg/dia de zumo de pomelo de forma que evapore 3000 kg/dia de agua por un lado y se obtenga una disolución concentrado de 50% por el otro ¿ con qué concentración porcentual inicial se deberá alimentar el zumo? (m1 = m2 + m3) (%m1 = %m2 + %m3)

Answers

Answer:

37 %.

Explanation:

¡Hola!

En este caso, para el problema descrito, conocemos la corriente de entrada y la de salida del agua, por lo que podemos obtener el flujo de la corriente que contiene el zumo a la salida una vez el agua fue evaporada:

[tex]F_{sol}=11500kg/dia-3000kg/dia=8500 kg/dia[/tex]

Luego, por medio de un balance de zumo de limón en el evaporador en el cual la cantidad que entra es igual a la que sale con sus respectivas concentraciones:

[tex]x_z^{entra}*11500kg/dia=x_z^{sale}*8500kg/dia[/tex]

Como la concentración del zumo a la salida es del 50 % (0.50), la de entrada es:

[tex]x_z^{entra}=\frac{x_z^{sale}*8500kg/dia}{11500kg/dia} =\frac{0.50*8500kg/dia}{11500 kg/dia}\\ \\x_z^{entra}=0.37[/tex]

Que es igual al 37%.

¡Saludos!

How many moles are in a sample of 2.39 x 10^23 atoms of sodium (Na)

Answers

Answer:

The answer is 0.4 moles

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\ [/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{2.39 \times {10}^{23} }{6.02 \times {10}^{23} } \\ = 0.39700996...[/tex]

We have the final answer as

0.4 moles

Hope this helps you

an atomic mass unit is defined exactly as

Answers

Answer:Atomic mass is the mass of an atom in atomic mass units (amu)

Atomic mass

• atomic mass (sometimes called atomic weight) is the mass of the atom in atomic mass units (amu). (from periodic table)

o One atomic mass unit is defined as a mass exactly equal to one-twelfth the mass of one carbon-12 atom. Carbon-12 is the carbon isotope that has six protons and six neutrons. Setting the atomic mass of carbon-12 at 12 amu provides the standard for measuring the atomic mass of the other elements.

o For example, experiments have shown that, on average, a hydrogen atom

What is the charge on an electron? -1 0 +1 +2​

Answers

Answer:

to be honest I don't know

Explanation:

my brain won't work with this

The number of grams of the solution if you were given 25.00 mL of the ethanol with a
density of 0.79 g/mL

Answers

Answer:

The answer is 19.75 g

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 25 × 0.79

We have the final answer as

19.75 g

Hope this helps you

If 23,000 joules of energy are used to heat mercury by 4.00 °C, what is the mass of the mercury?

Answers

Follow me because I think it is not sure

what chemical is C2H4O2

Answers

Answer:

C2H4O2 is Acetic acid.  

Explanation:

Acetic acid is a colourless liquid organic compound with the chemical formula CH3COOH (also written as CH3CO2H or C2H4O2). It is in the department of a chemical compound known as Glycolaldehyde. It is the smallest possible molecule that contains both an aldehyde group and a hydroxyl group.

With an average acceleration of 0.50 m/s?, how long will it take a cyclist starting from
rest to reach 13.5 m/s?

Answers

Answer:

t = 27 s

Explanation:

Given data:

Average acceleration = -0.50 m/s²

Time taken to reach to the 13.5 m/s = ?

Solution:

Formula:

Vf = V₀ + at

Vf = 0

V₀ = 13.5 m/s

a = -0.50 m/s²

Now we will put the values in formula.

0 = 13.5 m/s - 0.50 m/s²t

0.50 m/s²t =  13.5 m/s

t =  13.5 m/s / 0.50 m/s²

t = 27 s

Joy mixed baking soda and vinegar for her volcano model. She saw lots of bubbling and fizzing. What can she infer happened

A chemical change
A change in state liquid to solid

Matter was created

A physical change

Answers

Answer:

a chemical change

Explanation:

bubbles formed

Answer:

Explanation:

✔︎A chemical change

✖︎wich is D

 would be ur answer

Explanation:

❐A chemical change happens when one chemical substance is transformed into one or more different substances, such as when iron becomes rust. Chemical changes occur through the process of chemical reactions, and the resulting substances have different properties because their atoms and molecules are arranged differently.

CAN I PLZ GET MARK AS THE BRAINLIEST? ")

to determine the dependent variable, what question should you ask yourself?​

Answers

what change did the iv cause

can u see water vapour by a microscope?

Answers

Answer:

It can be formed either through a process of evaporation or sublimation. Unlike clouds, fog, or mist which are simply suspended particles of liquid water in the air, water vapour itself cannot be seen because it is in gaseous form

Explanation:

hope it help

Answer:

No. Unlike clouds, fog, or mist which are simply suspended particles of liquid water in the air, water vapour itself cannot be seen because it is in gaseous form

during a labaratory experiment a sample of aluminum is found to have a mass of 12.50 grams and a volume of 4.6 millititers what is the density of this samplw expressed to thw correct number of significant figures

Answers

Answer: download socratic for those type of answer it will give you GREAT ANSWERS !!

Explanation:

How much energy is required to melt a 500. gram block of iron? The heat of vaporization is 6090 J/g and the heat of fusion is 247 J/g.

3.05x10 6 J
2.47x10 2 J
1.23x10 5 J
6.09x10 3 J

Answers

Answer:

Heat required = 1.23×10⁵J

Explanation:

Given:

Mass (m) = 500 gram

Specific heat = 6,090 J/g

heat of fusion = 247 J/g.

Find:

Heat required

Computation:

Heat required = 247 J/g× 500 g

Heat required = 1.23×10⁵J

What does analyzing data involve?
A. Comparing trends or patterns that prove the hypothesis
B. Observing an experiment to collect data
C. Creating a hypothesis to answer a question
D. Forming a hypothesis to develop an experiment

Answers

Answer:

A. Comparing trends or patterns that prove the hypothesis

Explanation:

Analyzing data involves comparing trends or patterns that prove the hypothesis. Sometimes, the trend might invalidate the hypothesis.

Data analysis is a very important process in course of experimentation. It brings out the meaning of data and makes data useful. Analysis involves establishing patterns from a given set of data. The main aim of data analysis is to identify useful information. It usually entails cleansing and transforming data into a set that can be useful.

a boy walking in the street potential or kenetic energy?​

Answers

Kinetic

because the boy is walking in the street soo it has force to use

Answer:

[tex]\boxed {\tt Kinetic \ energy}[/tex]

Explanation:

First, let's define kinetic energy and potential energy.

Kinetic

energy an object has due to motion

Potential

energy an object has stored due to its position, charge, arrangement or other factors

Since the boy is walking down the street, the boy is in motion. Therefore, the energy must be kinetic energy.

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Vasco da Gama Why were children put to work?In the gilded age find the quotient 5,9,374 I need help with this pleaseee Complete the following sentences using the correct forms of the verb nacer or vivir or the phrases describing time or family relationships that you have learned so far.Fill in the blanks:a. Andrea es la vive de Fabin. Ellos piensan casarse pronto.b. Abuelo Agustn es el naces de Samuel. Samuel es su hijo.c. Marisol naces en Veracruz. Luego vivi por un tiempo ah. Luego se mud.d. Fabin nacer viva en Monterrey.___vive en Puebla.e. Samuel es el vivir de Marisol. Estn casados desde hace mucho tiempo. Pedro y Andrea son sus vivir.f. La abuela Mercedes vive en Puebla. El mes pasado viva en Guadalajara. Ella es la ____________ de Samuel.g. Andrea y Pedro son ____________ y tambin son nietos de Mercedes y Agustn.h. Fabin y Andrea son ____________. Pronto van a ser esposos.i. Abuelo Agustn nacio en Cancn y vivi un tiempo all. Describe three main ways in which plates move along plate boundaries? what landform is created when the oceanic plate is conducted or pushed under the continental plate? To which subsets of numbers does 30/15 belong ? Convert the unit rate: 60 mi/h = Ft/sPlease help me! Pargo Company is preparing its master budget for 2020. Relevant data pertaining to its sales, production, and direct materials budgets are as follows. Sales. Sales for the year are expected to total 1,900,000 units. Quarterly sales are 22%, 27%, 25%, and 26%, respectively. The sales price is expected to be $40 per unit for the first three quarters and $45 per unit beginning in the fourth quarter. Sales in the first quarter of 2021 are expected to be 10% higher than the budgeted sales for the first quarter of 2020.Production Management desires to maintain the ending finished goods inventories at 25% of the next quarter's budgeted sales volume. Direct materials. 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