A 55 kg person on Earth has the __________mass on the moon.

Answer: I’m pretty sure your answer is B

Explanation:

Answer:

The answers is B

Explanation:

I did that question before !!

Answer:

4th one

Explanation:

a physical change is something u can see, so if the substance changes its properties then thats a physical change.

Answer:

47.27 g HNO₃

Explanation:

The reaction between nitric acid (HNO₃) and calcium hydroxide (Ca(OH)₂) is the following:

2HNO₃(aq) + Ca(OH)₂(aq) → Ca(NO₃)₂ + 2H₂O(l)

According to the chemical equation, 2 moles of HNO₃ reacts with 1 mol of Ca(OH)₂. At the point of total neutralization, the total number of moles of  HNO₃ reacts with the total number of moles of Ca(OH)₂:

2 x moles HNO₃ = moles Ca(OH)₂

The number of moles is equal to the product of molarity of the solution (M) and the volume in liters (V):

M(HNO₃) = ?

M(Ca(OH)₂) = 0.73 M

V(HNO₃) = 25.00 mL x 1 L/1000 mL = 0.025 L

V(Ca(OH)₂) = 51.4 mL x 1 L/1000 mL = 0.0514 L

So, we can write the equation at neutralization point as:

2 x (M(HNO₃) x V(HNO₃)) = M(Ca(OH)₂) x V(Ca(OH)₂)

From this, we can calculate the molarity of HNO₃:

M(HNO₃) = (M(Ca(OH)₂) x V(Ca(OH)₂))/2 x V(HNO₃)

               = (0.73 M x 0.0514 L)/(2 x 0.025 L)

               = 0.75 M HNO₃

We can convert the molarity from M (mol/L) to g/L by using the molecular weight of HNO₃:

Mw(HNO₃) = 1 g/mol H + 14 g/mol N + (3 x 16 g/mol O) = 63 g/mol

Finally, we multiply the molarity by the molecular weight to obtain the grams of nitric acid per liter of solution:

0.75 mol/L HNO₃ x 63 g/mol = 47.27 g HNO₃

Answer: Calcium ion Ca² : 1 s² 2s² 2p ^6 (sorry I don't get 6 similar way as 2) 3s² 3p^6

Also 18 electrons, because Calcium donates two 4s electrons

Explanation:

Answer:

CaCO3 (s)

Explanation:

This equation is a double replacement equation, which means that since Na and Cl and paired, Ca and CO3 will be paired.

Then, you look at the charge of each element and balance

Ca has a 2+ charge

CO3 has a 2- charge

The 2+ charge and the 2- charge will cancel so there is no need for a  subscript or to balance the equation

The complete equation will be Na2CO3 (aq) + CaCl2(aq) -> NaCl (aq) + CaCO3 (s)

I hope this helps and have a great day!

You can download answer here

tinyurl.com/wpazsebu

Answer:

A.0.20M

Explanation:

c 1 V 1 = c 2 V 2

Initial Volume, V1 = 200 mL

Final Volume, V2 = 200 + 400 = 600 mL

Initial Concentration, c1 = 0.60 M

Final Concentration, c2= ?

Solving for c2;

c2 = c1v1 / v2

c2 = 0.60 * 200 / 600

c2 = 0.20M

Answer:

fossils are like bones of dinosaurs and other animals. fossil fuels are non renewable sources like natural gas, coal, and nuclear energy. (there is more than those)

Explanation:

Answer:

Lithium has a smaller atomic radius than potassium

Explanation:

Lithium has fewer electrons therefore fewer orbitals (1s2, 2s1) vs Potassium with more electron and therefore orbitals (1s2, 2s2, 2p6, 3s2, 3p6, 4s1)

Answer:

Explanation:

If you are not increasing the amount of vinegar, the adding more baking soda has nothing to react with. The limiting reagent is vinegar (or some other acid).

The usual reaction is

HC2H3O2 + NaHCO3 ===>  NaC2H3O2 + HOH + CO2 which is the gas being expelled.

If you increase the NaHCO3 nothing more will happen until you increase the vinegar.

Answer:

c. the use of radioisotopes to determine the age of something

Answer:4.5 ×10^22)

Explanation:

no. of particles =no. of mole×avogadro's number of particles no. of particles =0.75×6.02×10^23 no. of particles =4.5 ×10^22

Answer:

t = d/v , 33.3 ns

Explanation:

Since distance, d = vt where v = speed and t = time taken to cover the distance.

Since the distance, d covered by the alpha particle is the length of Rutherford's lab which is 10 m long and the speed of the alpha particle is v = 3 × 10⁸ m/s, the time, t it takes the alpha particle to move from the alpha particle source to the gold foil target is thus

t = d/v

= 10 m/3 × 10⁸ m/s

= 10/3 × 10⁻⁸ s

= 3.33 × 10⁻⁸ s

= 33.3 × 10⁻⁹ s

= 33.3 ns

Answer: 2400 km

Explanation: 1200 km/hr • 2 hr = 2400 km

Answer:

9 moles

Explanation:

The balanced chemical equation for this decomposition reaction is as follows:

2KCIO3 → 2KCI+ 302

Based on this equation, 2 moles of potassium chlorate (KCIO3) decomposes to form 3 moles of oxygen gas (O2).

Hence, 6 moles of pottasium chlorate will decompose to produce;

6 × 3 ÷ 2

= 18 ÷ 2

= 9 moles of O2.

Answer:

Partial pressure of O₂ =  228 mmHg

Explanation:

The mixture is made of three gases, He, N₂ and O₂.

Total pressure of it, is 781 mmHg.

There is a law from gases, that indicates the sum of partial pressures of each gas in a mixture will be the total pressure of the system. In conclussion:

Partial pressure of He + Partial pressure of N₂ + Partial pressure of O₂ = Total pressure.

331 mmHg + 222 mmHg + Partial pressure of O₂ = 781 mmHg.

Partial pressure of O₂ = 781 mmHg - 331 mmHg - 222 mmHg

Partial pressure of O₂ =  228 mmHg

Answer:

Por cada 9 moles de zinc, 9 moles de fosfato de zinc se producen.

Explanation:

La reacción balanceada es:

3 Zn+ 2 H₂PO₄ → Zn₃(PO₄)₂ + 2 H₂

Por estequiometria de la reacción (es decir, la relación entre la cantidad de reactivos y productos en una reacción química), las siguientes cantidades de moles de cada compuesto participan de la reacción:

Entonces podes aplicar la siguiente regla de tres: si por estequiometria 3 moles de zinc produce 1 mol de fosfato de zinc, 9 moles de zinc cuántos moles de fosfato de zinc producirá?

[tex]moles de fosfato de zinc=\frac{9 moles de zinc*1 mole de fosfato de zinc}{3 moles de zinc}[/tex]

moles de fosfato de zinc= 9

Por cada 9 moles de zinc, 9 moles de fosfato de zinc se producen.

Answer:

chemical weathering

physical weathering

biological weathering

Explanation:

biological weathering it when the plants grow the root move into the rocks to cause break down

Stomatal pores in plants regulate the amount of water and solutes within them by opening and closing their guard cells using osmotic pressure. In order for plants to produce energy and maintain cellular function, their cells undergo the highly intricate process of photosynthesis .

Answer:

Q = 219.07 J

Explanation:

Given that,

Mass of water, m = 15.4 g

The temperature changes from 22.2°C. to 25.6 °C.

The specific heat of water, c = 4.184 J/g °C

We need to find the heat needed to change in temperature. The formula is given by :

[tex]Q=mc\Delta T\\\\Q=15.4\times 4.184\times (25.6-22.2)\\\\Q=219.07\ J[/tex]

So, 219.07 J of heat is needed.

Answer:

The acronym is used to remember evidence of a chemical change.

Explanation:

P=precipitate

U=unexpected color change

F=fizzing

A=aroma

R=replaced by a new substance

T= temperature change

Answer:

A . 6.3 In a healthy pond, the temperature is 16°C (61°F). What is the most likely pH of this pond

In a healthy pond, the temperature is 16°C (61°F). 6.3 is the most likely pH of this pond.

A measure of the acidity or basicity of a substance or solution. The pH scale ranges from 0 to 14. A pH value of 7 is neutral on this scale, indicating that it is neither acidic nor basic.

A pH value less than 7 indicates that it is more acidic, while a pH value greater than 7 indicates that it is more basic.

"Potential of Hydrogen" is the full form of pH. The negative logarithm of H+ ion concentration is known as pH. As a result, the meaning of the name pH is explained as hydrogen strength or power.

Thus, In a healthy pond, the temperature is 16°C (61°F). 6.3 is the most likely pH of this pond, so the pond is more acidic in nature.

To learn more about the pH, follow the link;

https://brainly.com/question/15289741

#SPJ6

Answer:

The bowling ball is red, has stripes, and has 3 finger holes.

Answer:

The shape of the bowling ball is round. The color of the bowling ball is red. The bowling ball is hard. The bowling ball is smooth.

Explanation: Hope I helped

Answer:

C. Tip had the lower pressure, it was 652.71mmHg

Explanation:

To answer this question you need to convert both values into a common unit so you can compare directly.

87kPa = 652.71 mmHg

Answer:

tidak

Explanation:

kerana lidah bukan kulit,lidah ialah organ badan untuk merasa sesuatu,kulit kita hanya untuk mengeluarkan peluh bukan untuk merasa

Answer:

okay you need to find the synnomy

Answer:

nucleus i think

Explanation:

Answer: question 2 is (a) (25+273)k=298k(b) (373+273)k=646k

question 5 is 25 degree Celsius

question 1 is

a = (293-273) =20 degree Celsius

b = (470-273)=197 degree Celsius

question 3 is

a = naphthalene ball undergo sublimation due to which it convert directly into vapour and disappear into air without leaving any solid

b = the participle of perfume diffuse rapidly into air and its smell can be felt while sitting serval metre away

question 4 isthe force of allraction between the particles increases as we go from liquid to gas so the required order is : Oxygen< water< sugar

I hope it is helpful to you

Answer:

chymotrypsin, cleaves peptide bonds selectively on the carboxylterminal side of the large hydrophobic amino acids such as tryptophan, tyrosine, phenylalanine, and methionine

Under certain conditions butane reacts with oxygen to form butanone which can be easily hydrogenated to butanol. Butene is easily made from butanol by elimination of water.

Explanation:

These are for the first too