100 POINTS
A wire is coiled around an iron core, and a current runs through it to create an electromagnet. How would you INCREASE the power of the electromagnet?

Question 3 options:

Increase the voltage of the power source to create a higher current


Open a switch so that the current stops.


Replace the iron core with copper.


Make the wire straighter, so it wraps around the core fewer times

Answer:

While ionic bonds join metals to nonmetals, and covalent bonds join nonmetals to nonmetals, metallic bonds are responsible for the bonding between metal atoms. In metallic bonds, the valence electrons from the s and p orbitals of the interacting metal atoms delocalize.

Explanation:

Answer:

A

Explanation:

Hydrogen isn't an alkali metal

Answer:

hydrogen

Explanation:

hydrogen is a gas not a metal

Answer:

A budget is an estimation of revenue and expenses over a specified future period of time and is usually compiled and re-evaluated on a periodic basis. Budgets can be made for a person, a group of people, a business, a government, or just about anything else that makes and spends money.

Monounsaturated Fat 1g

Given

Mass of NO - 824 g

Molar mass of NO - 30.01g/mol

No of moles of NO = Given mass/Molar mass

No of moles of NO = 824/30.01= 27.45 mole

Hence 27.5 moles of NO are formed!

Answer:

1.9 L

Explanation:

Step 1: Given data

Step 2: Calculate the final volume of the gas

If we assume ideal behavior, we can calculate the final volume of the gas using the combined gas law.

P₁ × V₁ / T₁ = P₂ × V₂ / T₂

V₂ = P₁ × V₁ × T₂ / T₁ × P₂

V₂ = 1.5 atm × 3.0 L × 303 K / 293 K × 2.5 atm = 1.9 L

aluminium has bigger atomic size than chlorine

because atomic radii decreases across the period and increases down the group

this law would hold owing to the fact that chlorine and aluminum are on the same period

Answer:

a) 2 (H+) ions

b) 1 (SO3²-) ions

c) 1.36 × 10^-22 grams.

Explanation:

According to this question, sulfurous acid has a chemical formula; H2SO3. It is made up of hydrogen and sulfite ion. Hydrogen ion (H+) is the cation while sulfite ion (SO32-) is the anion.

Based on the chemical formula, there are 2 moles of hydrogen ions that reacts with 1 mole of sulfite ion as follows:

2H+ + SO3²- → H2SO3

Hence;

- there are 2 hydrogen ions (2H+) present in H2SO3.

- there is 1 sulfite ion (SO3²-) present in H2SO3.

c) The mass of one formula unit of H2SO3 is calculated thus:

= 1.008 (2) + 32.065 + 15.999(3)

= 2.016 + 32.065 + 47.997

= 82.08 a.m.u

Since, 1 gram is = 6.02 x 10^23 a.m.u

82.08 a.m.u = 82.08/6.02 × 10^-23

= 13.6 × 10^-23

= 1.36 × 10^-22 grams.

Answer:

A) It's correctly written

B) 77%

C) 835 calories

Explanation:

A) From online sources, we have number of calories as follows;

Fats: 9 calories per gram

Protein; 4 calories per gram

Carbs; 4 calories per gram

Total calories for each;

Total fat = 3 × 9 = 27 calories

Total protein = 3 × 4 = 12 calories

Total carbs = 32 × 4 = 128 calories

(sugar and dietary Fibre are classified as carbohydrates and so total carbs takes care of their calories).

Thus, total number of calories per serving = 27 + 12 + 128 = 167 calories per serving which is same as what is given.

B) percent from carbohydrates per serving = total calories from carbs/total number of calories per serving × 100% = 128/167 × 100% ≈ 77%

C) One box contains 5 servings. Thus total number of calories per box = 167 × 5 = 835 calories

Mass of Calcium Carbonate = 500 grams

The required reaction would be:

CaCl₂ + Na₂CO₃ → CaCO₃ + 2NaCl

Number of moles of CaCO₃:

Number of moles = given mass / molar mass

Number of moles = 500 / 100              [molar mass of CaCO₃ = 100g/mol]

Number of moles = 5 moles

Using the power of stoichiometry!!!

CaCl₂ + Na₂CO₃ → CaCO₃ + 2NaCl

from the balanced reaction listed above, we can see that one mole of CaCl₂ and one mole of Na₂CO₃ produces one mole of CaCO₃

Moles of CaCl₂ = Moles of Na₂CO₃ = Moles of CaCO₃

we just solved for the number of moles of CaCO₃, which gives us

Moles of CaCl₂ = Moles of Na₂CO₃ = 5 moles

Hence, 5 moles of CaCl₂ and Na₂CO₃ each is required

Answer:I believe it is c.

Explanation:

Answer:

C., or "geothermal energy."

Answer:

Hello, Im Mack. Hope you're doing well. :)

Here is my Correct, custom answer for the lab Question, (I also took the same assignment and got a 100% score)

Explanation:

The heating of the sodium acetate solution made it change from super-saturated to un-saturated. Yet now that it cooled back to room temperature Im sure it is saturated. it wasn't able to disolve the excess sodium acetate left over at room temperature and had to be heated so now that it is back to room temperature I Think it will not disolve the sodium acetate left in the solution until it is heated again.    

Hope this helped you out,

Please feel free to comment for further help, and I'll reply asap.

Have a great day my friend :)

We are given that the concentration of NaOH is 0.0003 M and are asked to calculate the pH

We know that NaOH dissociates by the following reaction:

NaOH → Na⁺ + OH⁻

Which means that one mole of NaOH produces one mole of OH⁻ ion, which is what we care about since the pH is affected only by the concentration of H⁺ and OH⁻ ions

Now that we know that one mole of NaOH produces one mole of OH⁻, 0.0003M NaOH will produce 0.0003M OH⁻

Concentration of OH⁻ (also written as [OH⁻]) = 3 * 10⁻⁴

pOH of the solution:

pOH = -log[OH⁻] = -log(3 * 10⁻⁴)

pOH = -0.477 + 4

pOH = 3.523

pH of the solution:

We know that the sum of pH and pOH of a solution is 14

pH + pOH = 14

pH + 3.523 = 14                              [subtracting 3.523 from both sides]

pH = 10.477                        

Answer:

Have 2 filled orbitals and 3 partially filled orbitals.

Explanation:

Hello there!

In this case, according to the given information of the electron configuration for that particle; it is possible for us to infer it has 5 valence electrons, as the electrons on its outermost shell (2). Moreover, we undertand this particle needs three bonds, does not have neither the electron configuration of a noble gas which ends by p⁶ nor that of an alkali earth metal as it ends by s².

Therefore, we infer the correct answer is Have 2 filled orbitals and 3 partially filled orbitals because according to the Hund's rule, the s orbital is fulfilled and the p orbital has 1 electron orbital fulfilled and two partially filled orbitals.

Regards!

Answer:

D

Explanation:

sound is produced when the matter vibrates

Answer:

D

Explanation:

the sound that is made is basically energy. This energy we call it vibration

Answer:

First you need to convert the cylinder to a boot, then you can successfully compress the water into the tip of the boot, preventing it from busting.

Explanation:

To convert a cylinder to a boot, simply multiply the circumference of the cylinder by 1.3125768927, or 1.31. The .31 is the extra space taken in by the tip of the boot.

Answer:

39.2 g

Explanation:

2Ni₂O₃(s) ⟶ 4Ni(s) + 3O₂(g)

First we convert 55.3 g of Ni₂O₃ into moles, using its molar mass:

55.3 g ÷ 165.39 g/mol = 0.334 mol Ni₂O₃

Then we convert 0.334 Ni₂O₃ moles into Ni moles, using the stoichiometric coefficients of the balanced reaction:

0.334 mol Ni₂O₃ * [tex]\frac{4molNi}{2molNi_2O_3}[/tex] = 0.668 mol Ni

Finally we convert 0.668 Ni moles into grams, using its molar mass:

0.668 mol * 58.69 g/mol = 39.2 g

Answer:  Mafic rocks are dominated by plagioclase and pyroxene (even if you can't see them with the naked eye) and smaller amounts of olivine. Intermediate rocks are roughly even mixtures of felsic minerals (mainly plagioclase) and mafic minerals (mainly hornblende, pyroxene, and/or biotite). There is little or no quartz.

HOPE THIS HELPS

The identity of the sample is copper. The correct option is  D. copper

To determine the identity of the sample, we will determine its specific heat, c.

From the formula

Q = mcΔT

Where Q is the quantity of heat

m is the mass

c is the specific heat of the substance

and ΔT is the change in temperature

From the given information

Q = 3080 J

m = 200 g

ΔT = T₂ - T₁ = 60°C - 20°C = 40°C

Putting the parameters into the formula, we get

3080 = 200 × c × 40

3080 = 8000c

∴ c = 3080 ÷ 8000

c = 0.385 J / g°C

From specific heat table, the substance that has a specific heat of 0.385 J / g°C is Copper.

Hence, the identity of the sample is copper. The correct option is  D. copper

Learn more here: https://brainly.com/question/13439286

Answer:

C) 5 moles of Argon (Ar)

Explanation:

5mol Na x 22.990g Na/ 1 mol Na = 114.95g Na

5mol P x 30.974g P/ 1 mol P = 154.87g P

5mol Ar x 39.948g Ar/ 1 mol Ar = 199.74g Ar

Therefore Ar has the greatesr mass.

Answer: single, normal weather event like a hurricane

Explanation:

Climate change is variation in the average weather conditions. This brings about a wetter, drier or warmer condition. Climate change is typically caused by human activities.

Some of the recent changes in global climate include prairies giving way to deserts in Africa and the American West, more and longer heat waves and coral reefs dying off.

It should be noted that a single, normal weather event like a hurricane isn't a result of climate change.

Answer:

Atoms have protons and neutrons in the center, making the nucleus, while the electrons orbit the nucleus. The modern atomic theory states that atoms of one element has its own characteristics atomic number.

Answer:

The answer is A: (more below)

Liquid A: Neutral

Liquid B: Acid

Liquid C: Base

Explanation:

Ph scale: 1 - 6 are acids, 7 is neutral, 8 - 14 are bases.  

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Answer:

josephmelichar

Explanation:

In the first step, 2 protons combine. In doing so one of the protons will convert into a neutron by losing a positron (positive electron) and a neutrino; this is also known as beta decay. This changes one of the protons (positive charge) into a neutron (neutral charge) and allows the two particles to combine.

Answer:

20 moles of o2

5 moles=4moles

?moles=16moles