someone help with this pls

Someone Help With This Pls

Answers

Answer 1

Answer:

12 B

13

0.00100176

Explanation:


Related Questions

What is the formula for the compound that contains Na+ and No3

Answers

Answer:

NaNO3

Explanation:

NO3^-1 has a charge of minus 1.

Na^+1 has a charge of +1

When they combine, the charges are not noted. You get NaNO3

Sodium Nitrate

A material that conducts electricity only at high temperatures.
A.Semiconductor
B.Compound
C.Luster
D.Brittle

Answers

Answer:

Semiconductor

Explanation:

Semiconductors conduct electricity as the temperatures increase.

Hope this helped.

If 1520 J are added to 16.5 g of water at 63.1 c what will the final temperature be

Answers

The final temperature of the water will be 31.2 C.

How many Elements are in the following molecule -CHNaO

Answers

Answer:

4 elements

C carbon

H hydrogen

Na sodium

O oxygen

Explanation:

Una muestra de 2,36 gramos de NaHCO3 se descompuso completamente en un experimento. 2NaHCO3 → Na2CO3 + H2CO3 En este experimento, el dióxido de carbono y los vapores de agua se combinan para formar H2CO3. Después de la descomposición, el Na2CO3 tenía una masa de 1,57 gramos. Determine la masa del H2CO3 producido. Calcule el porcentaje de rendimiento de H2CO3 para la reacción.

Answers

Answer:

105%

Explanation:

El porcentaje de rendimiento se define como la masa obtenida del producto (En este caso, en términos de H2CO3), dividida en la masa teórica que debe ser producida.

La masa real se obtiene con las moles del otro producto que fueron producidas (Que son las mismas moles producidas de H2CO3)

Y la masa teórica se obtiene a partir de las moles de reactivo adicionadas:

Masa teórica:

2.36g NaHCO3 * (1mol / 84g) = 0.0281 moles de NaHCO3

0.0281 moles de NaHCO3 * (1mol H2CO3 / 2 moles NaHCO3) =

0.014 moles de H2CO3 son producidas. La masa es:

0.014 moles de H2CO3 * (62g / mol) = 0.871g es la masa teórica

Masa real:

1.57g Na2CO3 * (1mol / 106g) = 0.014 moles de Na2CO3

0.0148 moles de Na2CO3 * (1mol H2CO3 / 1 moles Na2CO3) =

0.0148 moles de H2CO3 son producidas. La masa es:

0.0148 moles de H2CO3 * (62g / mol) = 0.918g es la masa real producida

Así, el porcentaje de rendimiento es:

0.918g / 0.871g * 100 =

105%

What is the number of valance electrons for oxygen

Answers

Answer:

six

Explanation:

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.

Answer:

Six!

Explanation:

Valence electrons are the electrons in the outermost shell of an atom.

Which substance is not produced during the electrolysis of concentrated aqueous sodium chloride?



A) Chlorine



B) Hydrogen



C) Sodium hydroxide



D) Sodium chloride​

Answers

The answer to this question would be D

The substance is not produced during the electrolysis of concentrated aqueous sodium chloride is D) Sodium chloride​

Which substance is produced for the duration of the electrolysis of concentrated aqueous sodium chloride?

while an electric current is handed via concentrated sodium chloride answer, hydrogen gasoline bureaucracy at the negative electrode, chlorine gas bureaucracy at the fantastic electrode, and an answer of sodium hydroxide also form.

What occurs whilst the concentrated answer of sodium chloride is electrolyzed?

(a) when a concentrated solution of sodium chloride (brine) is electrolyzed, it gets decomposed. this is a decomposition reaction. the products of this reaction are sodium hydroxide, chlorine, and hydrogen.

Learn more about Sodium Chloride at https://brainly.com/question/24878544

#SPJ2


How many significant digits would you report an answer to if you divided 2.654 by 3.2?

answer choices
1
2
3
4

Answers

Answer:1

Explanation:

The process in which the nuclei of two atoms combine to form a heavier atom, releasing a large amount of energy is known as -​

Answers

Answer: Nuclear fusion

Explanation:Nuclear fusion is the process by which two or more atomic nuclei join together to form a single heavier nucleus and large amounts of energy.

Which two changes of state can occur when a substance gains thermal
energy?

Answers

Answer:

Adding enough thermal energy to a substance can cause a change of state to occur. The change of state from a solid to a liquid is called melting. When energy is added to an ice cube, the ice particles speed up as energy is absorbed. When the particles move fast enough, the solid ice melts and becomes liquid water

Answer:

c and d

Explanation:

In carbon dioxide, how many grams of oxygen would there be if there are 24
grams of carbon?
a 55 g
b 73 g
c 64 g
d 88 g

Answers

Answer:

c. 64 grams

Explanation:

What is the proper combining ratio (by mass) for carbon to oxygen in the reaction that forms carbon dioxide (CO 2)? From the data given in question 1, since 64 grams of oxygen reacts with 24 grams of carbon, the ratio must be 64 to 24, which is 2.7 parts oxygen to 1 part carbon.

What Is It?
Imagine you find a bowl filled
with clear liquid in your kitchen. List three liquids it might be. Describe how you could use the liquid's physical and chemical properties to determine which of the three it is.

Answers

Answer:

physical

Explanation: water can change from solid to liquid to a gas

Highlight the larger unit of measure under each letter (a-f). Then, write if the unit highlighted measures distance, volume, or weight (mass).
a. meter or kilometer
b. yard or foot
c. cup or quart
d. pound or ounce
e. liter or milliliter
f. gram or kilogram

Answers

Answer:

2. The unit could be gram or kilogram ⇒ answer f

3. The larger unit is kilogram and measures weight (mass)

Step-by-step explanation:

Let us revise the SI units of measuring

The SI unit of measuring distance is meter

The SI unit of measuring volume is liter

The SI unit of measuring mass is kilogram

2.

When this pet hamster is placed on a digital scale, the  scale reads 1.5

∵ The SI unit of measuring weight (mass) is kilogram

∵ The scale reads 1.5

∴ The unit is kilogram

The unit could be gram or kilogram

3.

∵ The larger unit of measure is kilogram

∵ Kilogram measures the weight (mass)

∴ The unit measures weight (mass)

The larger unit is kilogram and measures weight (mass)

Explanation:

What is the wavelength of electromagnetic radiation which has a frequency of 4.464 x 10^14 s-1

a. 1.338 x 10^23 m
b. 1.489 x 10^-6 m
c. 6.716 x 10^-7 nm
d. 671.6 nm

Answers

Answer:

d. 671.6 nm

Explanation:

It is possible to solve the wavelength of a radiation from its frequency -or vice versa- using:

λ = c / f

Where λ is wavelength,

c is speed of light, a constant (2.998x10⁸m/s)

And f is frequency: 4.464x10¹⁴s⁻¹

Replacing:

λ = 2.998x10⁸m/s / 4.464x10¹⁴s⁻¹

λ = 6.716x10⁻⁷m

As 1m = 1x10⁹nm:

6.716x10⁻⁷m * (1x10⁹nm / 1m) = 671.6nm

Right answer is:

d. 671.6 nm

how many bonds can nitrogen have

Answers

Answer:

3

Explanation:

I think so, let me know if its wrong.

Which of the following is an ion?

Answers

B is your answer so ya

ANSWER THESE 5 MULTPLE CHOICE QUESTIONS!!!
I'LL GIVE 30 POINTS AND A BRAINIEST:)

Answers

Answer: 1, magnesium & mg

2, two energy shells

Explanation:

1 , mag shells a, d i hope this helped

Among the groups of elements listed below, which have the same number of electrons in their outermost energy levels? C, K, Ca, Rb, Sr
Na,Mg,AI,S
Li,B,C,F
F,CI,Br,I​

Answers

Answer:

i believe its d

Explanation:

Answer:

I checked and I too think its D

BOYLES LAW
GUYS PLZ HELP ME WITH THESE TWO
ILL CHOOSE U BRAINLIEST

Answers

use the formula p1v1= p2v2

for 1

300×300=500×x

x=180ml

Question 6 W If 50. mL of 1.0 M NaOH is diluted with distilled water to a volume of 2.0 L, the concentration of the resulting solution is А 0.025 M B 0.050 M C 0.10 M D 0.50 M E 1.0 M​

Answers

Answer:

im not sure man

Explanation:

what is the average atomic mass of neon from this data ?​

Answers

Answer:

The average atomic mass of neon20.18 amu.

MOLES AND MOLAR MASS

Answers

2.03 kg = 2030 grams

2030g C6H8O7 (1 mol/ 192.124g) = 10.6 mol C6H8O7

WILL GIVE BRAINLIEST

Which statement describes earthquakes?


They release energy.

They are caused by reduced stress in rocks.

They begin at the epicenter.

They result from movement on Earth’s surface.

Answers

they release energy.

Answer:

A

Explanation:

(a)² + (b)² = ?
help please

Answers

answer:

a^2+b^2= (a+b)² -2ab

Find the number of moles of argon in 534 g
of Argon

Answers

Answer:

13.4 mol Ar

General Formulas and Concepts:

Chemistry - Atomic Structure

Reading a Periodic TableUsing Dimensional Analysis

Explanation:

Step 1: Define

534 g Ar

Step 2: Identify Conversions

Molar Mass of Ar - 39.95 g/mol

Step 3: Convert

[tex]534 \ g \ Ar(\frac{1 \ mol \ Ar}{39.95 \ g \ Ar} )[/tex] = 13.3667 mol Ar

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

13.3667 mol Ar ≈ 13.4 mol Ar

Answer:

The number of moles in 452 grams of Argon is 13.31 moles.

Explanation:

Hydrofluoric acid is what type of acid?

Answers

Hydrofluoric acid is a solution of hydrogen fluoride (HF) in water. Solutions of HF are colourless, acidic and highly corrosive. It is used to make most fluorine-containing compounds; examples include the commonly used pharmaceutical antidepressant medication fluoxetine (Prozac) and the material PTFE (Teflon).

A 10.-liter flask at a given temperature and pressure contains 6.0 × 1023 molecules of hydrogen gas. Under the same conditions of temperature and pressure, how many molecules would a 10.-liter flask of nitrogen gas contain?

Answers

Answer:

The same number of molecules, 6.0 × 10²³ molecules.

Explanation:

The amount of any given gas that can be stored in a container depends on the temperature, pressure and volume of the container. It does not depend on the nature (or identity) of the gas.

So if a 10-liter flask contains 6.0 × 10²³ molecules of hydrogen gas, it will contain the same amount of molecules of any other gas when temperature and pressure remain constant.

Why is radium more reactive than calcium?

Answers

Because radium is created from the decay of the uranium atom,

2 KClO3 (s) → 2 KCl (s) + 3 O2 (g)
how many atoms are in 3.2 moles of KCl?

Answers

Answer:

If u use math why It will give u the answer like 3x3=9

Explanation:

Use the balanced equation given below to solve the following problem; Calculate the volume in liters of CO produced by the reaction of 175 g of Sb2O3.

Sb2O3 + 3 C --> 2 Sb + 3 CO

40.3 L CO
7.81 L CO
20.2 L CO
13.4 L CO

Answers

Answer: 40.3 L

Explanation:

To calculate the moles :

[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]

[tex]\text{Moles of} Sb_2O_3=\frac{175g}{291.5g/mol}=0.600moles[/tex]

[tex]Sb_2O_3+3C\rightarrow 2Sb+3CO[/tex]  

According to stoichiometry :

1 moles of [tex]Sb_2O_3[/tex] produces = 3 moles of [tex]CO[/tex]

Thus 0.600 moles of [tex]Sb_2O_3[/tex] will produce=[tex]\frac{3}{1}\times 0.600=1.80moles[/tex]  of [tex]CO[/tex]

Volume of [tex]CO=moles\times {\text {Molar volume}}=1.80moles\times 22.4L/mol=40.3L[/tex]

Thus 40.3 L of CO is produced.

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