Chemistry High School

Help! Locks at 12

Given the balanced equation representing a nuclear reaction:

Which particle is represented by X?

Answers

Answer 1

Answer is #4 (neutrons)

Explanation:

Total mass before the reaction is 236 amu. The total mass of the two elements is 233 amu. This means that there are 3 amus carried by element X. Looking at the total atomic number of the two elements after reaction, it's 92, the same as the one at the beginning. This means that element X has zero atomic number, which could only be a neutron.

Answer 2

Answer: is 4

Explanation:

I was doing the same one

Related Questions

A gas initially has a volume of 300. mL at a pressure of 1.0 atm, what will the
new volume be if the pressure is doubled? (assume constant temperature)

Answers

The new pressure will be
1000 L
, rounded to one significant figure.
Explanation:
Boyle's law states that when a gas is held at a constant temperature and mass in a closed container, the volume and pressure vary inversely. The equation to use is
P
1
V
1
=
P
2
V
2
.
Given
V
1
=
200
mL
×
1
L
1000
mL
=
0.2 L

P
1
=
700 mmHg

V
2
=
100
mL
×
1
L
1000
mL
=
0.1 L

Unknown
P
2

Equation
P
1
V
1
=
P
2
V
2

Solution
Rearrange the equation to isolate
P
2
and solve.
P
2
=
P
1
V
1
V
2

P
2
=
(
700
mmHg
×
0.2
L
)
0.1
L
=
1400 L
, which must be rounded to
1000 L
because all of the measurements have only one significant figure.

Describe the trends in properties of chlorides across period 3 .Their formula .Their state .Their volatility .Their structure .The ph of aqueous chloride solution

Answers

Answer:

See explanation

Explanation:

Period 3 elements include; Na, Mg, Al, Si, P,S,Cl and Ar

Across the period, the chlorides of the elements change from solid to gas. The chlorides of metals are solid while the chlorides of non metals are gaseous.

Also, the chlorides become more volatile across the period. The formulas of the chlorides change from MCl to MCl2 to MCl3 to MCl4, MCl5 and MCl6 respectively across the period where M is a period 3 element.

The pH of the solutions of chlorides of period 3 elements change from neutral to acidic across the period. The pH of the chlorides of metals are neutral while the chlorides of the nonmetals usually yield acid solutions.


What is the amount of sodium hydroxide, NaOH, in 4.6 g? Use the values given for
the atomic mass of Na, H, and O.
6
Na = 22.989 770 u
H = 1.007 94u
0 = 15.99944
9
a) 0.19 mol
12
b) 0.12 mol
15
c) 1.8 x 102 mol
d) 0.20 mol

Answers

Answer:  0.12 Mol

Explanation:  Molecular mass of NaOH is = 39,997 g/mol which is Atomic mass of Na + Atomic Mass of H + Atomic mass of O

4.6g / 39.997g/mol = 0.12 mol

A seais usually defined as A.A body of freshwater that is not connected to the ocean B. A body of freshwater that is connected to the ocean C. A body of salt water that is not connected to the ocean D. Body of salt water that is connected to the ocean

Answers

Answer:

D. Body of salt water that is connected to the ocean

Explanation:

An ocean is a body of salt water which covers approximately 70% of the Earth's surface. About 97% of the Earth's water is comprised of ocean and as such it is the most prominent and defined feature of the Earth. There are basically four (4) categories of an oceanic basin and these are;

1. The Pacific ocean.

2. The Artic ocean.

3. The Atlantic ocean.

4. The Indian ocean.

A sea is usually defined as a body of salt water that is connected to the ocean and are surrounded (enclosed) by land partially.

Basically, a sea is formed where a land and an ocean meet and as a result, an ocean is usually bigger than a sea.

Some examples of seas around the world are Red sea, Mediterranean sea, Sargasso sea, Caribbean sea, Baltic sea, Caspian sea, Chuckchi sea, etc.

Answer:

Yes The Anwer is D Hope This Help:)

Other Questions
No livro contos brasileiros 2 se destaca um conto com focos narrativo onipresentes e onisciente qual este conto can someone please help me out Do you think websites such as ancestry and 23andme should have databases that are not allowed to be used by lawenforcement or insurance companies, and be 100% private? Currently, they can be used without any restrictions. Explain your answer. HELP ME- what is the power of a single voice. DESCRIBE IT find the value of x. Which story element does the author develop in this excerpt? the names of the class ard, and there under n't help myself - I glanced O plot details about the narrator's first day of school O characterization of Miss Wu O characterization of Jimmy plot details about the class elections Save and Exit Next Submit Help with this math image below The invention of the microscope led to the discovery of the cell by Robert Hooke. While looking at cork, Hooke observed the box-shaped structures, which he called "cells" because they reminded him of the cells (rooms) found in monasteries. This discovery led to the development of the cell theory. Credit for developing the cell theory is usually given to two scientists. Theodor Schwann and Matthias Schleiden. The cell theory was then proposed by Theodor Schwann in 1839. There are three parts to this theory: living organisms are made up of cells, cells are the basic structural unit of all organisms, and all cells come from pre-existing cells. Which of these is supported by the tenets of the cell theory? Select ALL that apply. les )) A) Energy flow occurs within cells. B) Mitosis produces identical daughter cells. C) Living organisms can be unicellular or multicellular. D) DNA is copied and passed between cells during cell division. E) Single-celled bacteria grow and then divide in half to make new bacteria. An object travels down a ramp at a constant acceleration. The object experiences a force of friction and a gravitational force. Which of the following could be true about the motion of the object?a. The force of friction acts in the same direction as the object travels. b. The force of friction between the surface and the object is less than the component of the gravitational force that is parallel to the ramp. c. If the object increased in mass, the object's acceleration would change. d. If the object increased in mass, the normal force exerted on the object would remain the same. Darius is studying the relationship between mathematics and art. He asks friends to each draw a "typical rectangle. He measures the length and width in centimeters of each rectangle and plots the points on a graph, where x represents the width and y represents the length. The points representing the rectangles are (6.1, 12.0), (5.0, 8.1), (9.1, 15.2), (6.5, 10.2), (7.4, 11.3), and (10.9, 17.5). Which equation could Darius use to determine the length, in centimeters, of a "typical rectangle for a given width in centimeters?y = 0.605x + 0.004y = 0.959x + 0.041y = 1.518x + 0.995y = 1.967x + 0.984 What is the value of x^2/y^1 when x=10 and y=5? Consider this example on how different a median can be from a sample. Suppose there is a company that mentions the average salary at Company A last year was $ 135,750 per year. Being interested in this you try to investigate this. You discover there are 8 individuals, including the business owner, that works at the company. You discover that the salaries of the 7 individuals are surprisingly low. The salaries of those 7 individuals are $8,000, $8,000, $7,000, $11,000, $15,000, $17,000, and $20,000. You then discover the salary of the business owner to be $1,000,000.Compare the mean with the median? What does this show?Find Q1 (first quartile) , Q3 (third quartile) , and Interquartile Range (IQR)?Are there outliers? Please prove there is an outlier using the Q1-1.5*IQR and Q3 + 1.5*IQR formulas?Find the 10% trimmed mean of the 8 salaries above. Compare this with the median found in part a.What do you think represents a more typical salary of the organization above? Would you want to work for this company? Fill in the blanks below in order to justify whether or not the mapping shown represents a function por favor ayudaaaaaa Refer to the Newsela article "Opinion: As World Changes, Education Must, Too." Which claim does the author make in the article? The Industrial Revolution led to major improvements in job skills education. Most great ideas are developed by people working on their own. Incorporating job training is necessary to improve education systems. Spending money on roads and buildings helped develop a more skilled workforce. A right triangle has side lengths 5, 12, and 13 as shown below. Use these lengths to find tan B, sinB, and cos B. (marking brainlist) which wave characteristic is the same for all electromagnetic waves traveling through a vacuum? 1. Sabes dnde ________ el Hotel Hilton? _______ en la Plaza Mayor. _______ muy cmodo. A. es, est, est B. est, est, es C. est, es, es D. est, est, est2. Felipe ________ el mejor atleta del colegio. Hoy no juega en el partido de ftbol porque _______ enfermo. A. es, es B. est, est C. est, es D. es, est3. Claro, la leche _______ buena para los nios pero la leche que compraste ayer no _______ buena. ______ agria (sour). A. est, es, es B. es, est, est C. es, es, es D. est, es, esta4. Los pltanos _______ frutas tropcales. Esos pltanos _______ verdes porque no _______ maduros (ripe). A. son, estn, estn B. son, son, estn C. son, son, son estn, son, estn5. Caf _______ una bebida deliciosa pero este caf que _______ en la mesa. _______ horrible! A. es, es, es B. es, es, est C. est, est, es D. es, est, est6. Esos estudiantes _________ responsables pero hoy _________ un poco nerviosos porque tienen el examen final. A. estn, son B. son, son C. son, estn D. estn, estn7. Mara _______ triste porque no _______ en la fiesta. La fieta _______ en la casa de su amiga Rosa. A. est, es, es B. est, es, est C. est, est, est D. est, est, es8. Silvia _______ peruana (Peruvian) _______ de Lima. Hoy ________ de vacaciones en Barcelona. A. es, es, est B. es, est, est C. es, es, es est, est, est y = one-third (x + 2) What is the range of the function in this table? y 1 22 43 34 2a. (1,2), (2,4), (3,3), (4,2)b. (1,2)c. {1,2,3,4}d. {2,3,4}