HELP IN 8TH GRADE ADV SCIENCE

HELP IN 8TH GRADE ADV SCIENCE

Answers

Answer 1

Answer:

protons: 36

neutrons: 48

electrons: 36


Related Questions

An object is moving across a surface, but it does not gain or lose speed. Which best describes the object’s force?

Answers

Answer:

Explanation:

the vector sum of all such forces which equals zero for an object at rest. CASE 1: Considering a basketball of weight 1kg, if it has been kept stationary on the ground, there are two forces acting on it. These are it's weight (gravity) and equal and opposite force from the ground (normal reaction).

Answer:

The net force is zero. :)

Explanation:

A molecule contains 24.36 g of nitrogen and 62.64g of sliver

Answers

Answer:

This molecule is AgN3

Explanation:

Answer:

AgN3

Explanation:

Mass of nitrogen N is given as 24.36 g

Molar mass of nitrogen N= 14 g/mol.

amount of substance in mol of N = mass/molar mass

=24.36 g/ 14 g/mol.

=1.74 mol.

Given mass of silver= 62,64 g.

Molar mass of silver Ag=107.87 g/mol

Number of mols=62.64 g ÷ 107.87 g/mol.

=0.58 mol.

Ratio of number of mol of N and number of mols of Ag = 1.74 mol / 0.58 mol

=3:1

Hence, empirical formula is AgN₃.

What would happen if a neutron was added to Lithium (7)

Answers

Answer:

if you add a neutron to lithium-7 it becomes a compound nucleus of lithium-8

What did you include in your response? Check all that
apply.
O No, thermal energy is not being transferred by
radiation in this image.
O The eggs are in direct contact with the metal pan,
which is in direct contact with the gas flame.
O Thermal energy is being transferred by conduction.
O Radiation transfers thermal energy by
electromagnetic waves.
O Radiation does not transfer thermal energy by
direct contact.

Answers

If you included all of them, check all
I’m just gonna explain it okay so if you included it in you paragraph response just check it off there is no right or wrong

A scientist thinks he found a new metal, so he published a paper about this metal. About 1 week after the scientist published the paper, you noticed a problem with the paper the scientist wrote. You noticed that this metal was not a new metal. In fact, this metal was discovered years ago. You determined this when you saw the atomic emission spectrum. As you read the article, you remembered that each atomic emission spectrum is unique to each element and the atomic emission spectrum matched one that was already discovered. Using the techniques from Chemistry, you ran a Flame Test with a piece of the metal (the metal is safe to use) that you had shipped to you. You found the metal turned the flame yellow. What metal did you have in your possession?

**ANSWER CHOICES**
*Barium
*Calcium
*Strontium
*Copper
*Sodium

Answers

Answer:

Sodium

because it burns with a yellow-orange flame.

Explanation:

It relates with Barium which burns with yellowish green flame

PLEASE HELP !!
Use the diagram below to answer the following questions.
PLEASE HELP
E TE
Figure B
In Figure B, which region contains the noble gas family of elements?
ОА
OD
ОС
OB

Answers

Noble gas located in the region D

Further explanation

Noble gas are located in group 18 in the periodic table consisting of helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), have a stable electron configuration where the valence electrons are 8(full outer shell of electrons), so it is very hard to react because of its stability

If we look at the periodic system of the elements, the noble gases are on the far right, so that in Figure 8 it is located in area D

And the other region :

A : alkali elements(group 1),

B : alkaline earth elements(group 2)

C : halogen elements(group 17)

Which of the following best describes the velocity of an object?
A B0 m/s
B 30 m east
C 30 m/s east
D 30 m/s2

Answers

The answer is c
30 m/s east

Answer:

[tex]\boxed {\boxed {\sf C. \ 30 \ m/s \ east}}[/tex]

Explanation:

Velocity is the vector measurement of the change in position over time. A vector measurement means the answer must include a magnitude (numerical value) and a direction.

Here are some units of velocity:

m/s (meters per second) kph (kilometers per hour) km/s (kilometers per second)

There are many other units, but m/s is the most common.

We can eliminate choice B and D, because the units (meters-m and meters per second squared-m/s²) are not for velocity.

We are left with choice A (30 m/s) and C (30 m/s east). Remember, velocity needs a number and a direction. C contains the direction east, so it must be the correct answer.  

Are scientist improving the plant or corrupting it

Answers

Answer:

46 percent of trees have been cut down.

Scienctists helps plants, but humans do destroy a lot of plants.

Scientists - helps increase plant growth.

Woodchoppers - helps decrease plant growth.

Other Questions
Solve the following equations | 3x + 3/7 | = 2 1/3 What would happen if a neutron was added to Lithium (7) Which of the following quotes best represents the theme of gender in the novel?None of the Iraqi men seemed to take notice of Marla, but the women did, and I saw one of them smiling.""We want freedom, we want love, we want a chance to go to heaven when the time comes."we will be able to divert men away from that operation to providing security for your people."You're not allowed to treat Iraqis." Arizona, New Mexico, and Nevada must honor the Native American reservation treaties drawn up by the..........government for the Native American Nations. Please help me I do not know how Explain the Confucian principle of li.I NEED HELP FAST I WILL GIVE BRAINLEST TO WHO EVER HAS THE SMARTEST ANSWER AND WHOEVER HELPS!!! THANKS!!! What happens when weathering and erosion work together? A.Weathering B.Raining C.Erosion D.breakingBRAINLIEST Find the solution to the system of equations.You can use the interactive graph below to find the solution.\begin{cases} y=-7x+3 \\\\ y=-x-3 \end{cases} y=7x+3y=x3 Which expressions are equivalent to 6a(5+d) ?Select each correct answer.30a+6ad30ad30a+(6ad)(6a5)+(6ad)11a + d Who invented the modern printing press? Question 49 options: Johannes Gutenberg Albrecht Drer Jan Van Eyck Martin Luther The First Agricultural Revolution is best described as a period during which __________.A.tools made of bone and stone were first widely usedB.humans were nomadic and lived in small communitiesC.humans hunted and gathered for subsistenceD.humans cultivated plants and domesticated animals What does mr.Jones shout while drinking in chapter 1 of winter dream A molecule contains 24.36 g of nitrogen and 62.64g of sliver which model represents 1/3 HELP!!! STATS!!! A random sample of 100 felony trials showed a sample mean waiting time between arrest and trial = 173 days with a population standard deviation of waiting times = 28 days. Find a 99% confidence interval for the population mean waiting time.Stats question, I'm really stck please help me! Evaluate the following expression when n = 6.|n - 6| - |5 - n| Explain how growing personal income is related to economic conditions. How does the final line of the poem reveal the theme?AIt illustrates how secrets can lead to disaster.It shows that praise can be used to deceive others.It suggests that unhappiness can lead to evil actions,DIt highlights how music can be both beautiful and dangerous. express the scientific notation:4830000000 with all formula The Environmental Protection Agency has been the environments watchdog for close to years.fivetwenty-fiveforty-fivesixty