A student needs to make 0.855 L of a sodium bromide solution for an experiment. The concentration of the required solution is 0.350 M. How many grams of sodium bromide will he need to use?

Answers

Answer 1

Answer:

Explanation:

Molarity =  moles/liters of solution

moles    = molarity x Liters of solution

            =  0.350 m/L x 0.855 L

            =  0.299 mol

               mass = moles  x  molar mass    

            = 0.299 mol x 102.89 g/ms

            =  30.78 grams


Related Questions

If there are more shells does the nuclear charge decrease

Answers

Answer: Yes, if there are more shells the nuclear charge decreases.

5. How do ocean currents impact land temperatures? 1.Winds from the land help drive ocean currents. 2.Winds from the ocean bring temperatures related to the ocean currents. 3.Ocean currents do not impact land temperatures. 4.Ocean currents bring temperatures away from the nearby land.​

Answers

Answer:

the answer is the option 4

Explanation:

i believe its number 4 because when you live near a beach the temperature is cooler

A sample of Element X is found to contain 82.15% of isotope type 1 (84.9118 amu)
and 17.85% of isotope type 2 (86.9092 amu). Calculate the average atomic
mass.

Answers

Answer:

Have you gotten your answer yet?

The average atomic mass of element X is 85.26 amu.

To calculate the average atomic mass of Element X, we need to take into account the abundance of each isotope and its respective atomic mass.

First, let's assign variables to the abundance and atomic mass of each isotope:

- Isotope 1: abundance = 82.15%, atomic mass = 84.9118 amu

- Isotope 2: abundance = 17.85%, atomic mass = 86.9092 amu

To calculate the average atomic mass, we can use the following formula:

average atomic mass = (abundance₁ ×atomic mass₁) + (abundance₂ ×atomic mass₂)

Substituting the values:

average atomic mass =

[tex]\dfrac{82.15\times84.9118}{100}+\dfrac{17.85\times86.9092}{100}\\=85.26 \ \rm{amu}[/tex]

Thus, average atomic mass of element X is 85.26 amu.

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calculate the number of moles of Cu in 2.4x10^21 atoms of Cu

Answers

Answer:

0.004 moles

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{2.4 \times {10}^{21} }{6.02 \times {10}^{23} } \\ = 0.003986[/tex]

We have the final answer as

0.004 moles

Hope this helps you

The gas release during a chemical reaction which causes fizzing known as?

Answers

Answer:

Hey mate...

Explanation:

This is ur answer....

Effervescence

Effervescence is the escape of gas from an aqueous solution and the foaming or fizzing that results from that release.

Hope it helps!

Brainliest pls!

Follow me! ♧

Explanation:

Your answer is effervensecence

How many moles are in 13.5g of calcium?

Answers

Answer: 0.337 mol Ca

Explanation: 13.5 g Ca ÷ (40.1 g/mol Ca) =

Answer:

13.5/40+0.3375

Explanation:

Aristonun teorisini çürüten bilim adamı

Answers

Can you please translate to English?

For a substance to change from a gas to a liquid the particles must _____

Answers

Answer:

The gas particles must touch a cold surface to start to slow down and get closer to form a liquid.

homogeneous or heterogeneous ang ibig sabihin ng dalwang ito ​

Answers

Answer:

tae nimo par and thankyou

Explanation:

i hope its help

What system was put into place in 1965 to help people be prepared for future tornados? WILL GIVE BRAINLIEST AND THANKS


Question 2 options:


NOAA



SKYWARN



SKYWATCH

Answers

Answer:

Eas and NOAA is that system

The accuracy of a measurement
??

Answers

Answer:

-indicates that the measurement is also precise.

Explanation:

Pretty sure it's option 2.

( BRAINLIEST)
Which Salt is formed when Ammonia reacts with Nitric acid ?

Answers

Answer:

When nitric acid reacts with ammonia, ammonium nitrate is formed.

What might the student have done that caused this
error? List all possible causes.

Answers

Answer:

They need to put a question that has an error in it

Answer:

The capillary tube was too close to the bottom of the beaker.

The ruler may have moved.

Water got into the capillary tube.

The temperature was not allowed to equilibrate in the 2-4 minutes


A 50g block of aluminum at -100°C is submerged in 30g of water at 20°C.
Cwater = 4.184 J/gºC
AH tus water = 334 J/g
Cu = 0.89 J/gºC
What is the final temperature of both substances?

Answers

Umm Cwater cuz it is

The struggle between organism to suvuve in a habitat with limited resources is called

Answers

It's called "competition"

covalent compounds are generally made up of elements found in which part of the periodic table?

Answers

Answer:

elements from group four to eight

Determine the element, given the number of protons in an atom

Answers

You can determine an element based on its protons due to the atomic number.
Atomic number is the number of protons in an atom and you can locate it on your periodic table as the number above the letter. Each element has a different number of protons and because of that you can find the element on the periodic table based on its atomic number.

How many moles of HCl can be produced from 0.207 g of SOC12 SOC12(1) + H2O(1) = SO2(g)+ 2HCl(g) ​

Answers

Answer:

.80*10⁻³ moles of HCl can be produced from 0.226 g of SOCl₂

Explanation:

The balanced reaction is:

SOCl₂ + H₂O ----> SO₂ + 2 HCl

By stoichiometry of the reaction they react and produce:

SOCl₂: 1 mole

H₂O: 1 mole

SO₂: 1 mole

HCl: 2 mole

Being:

S: 32 g/mole

O: 16 g/mole

Cl: 35.45 g/mole

H: 1 g/mole

the molar mass of the compounds participating in the reaction is:

SOCl₂: 32 g/mole + 16 g/mole + 2*35.45 g/mole= 118.9 g/mole

H₂O: 2*1 g/mole + 16 g/mole= 18 g/mole

SO₂: 32 g/mole + 2*16 g/mole= 64 g/mole

HCl: 1 g/mole + 35.45 g/mole= 36.45 g/mole

Then, by stoichiometry of the reaction, the following amounts of mass react and are produced:

SOCl₂: 1 mole* 118.9 g/mole= 118.9 g

H₂O: 1 mole* 18 g/mole= 18 g

SO₂: 1 mole* 64 g/mole= 64 g

HCl: 2 mole* 36.45 g/mole= 72.9 g

Then the following rule of three can be applied: if by stoichiometry of the reaction 118.9 grams of SOCl₂ produce 2 moles of HCl, 0.226 grams of SOCl₂ how many moles of HCl do they produce?

moles of HCl= 3.80*10⁻³

3.80*10⁻³ moles of HCl can be produced from 0.226 g of SOCl₂

What is caused by the suns and mom gravitational pull on the earth

Answers

Answer:

earth quakes, tornados, hurricans

Explain what it means for an atorn to be neutral.

Answers

number of electrons or protons present in a neutral atom is called atomic number. It is represented by Z.

Write an isotope notation for the
most common isotope of nitrogen
and two other isotopes of nitrogen.

Answers

Answer:

Natural nitrogen (7N) consists of two stable isotopes: the vast majority (99.6%) of naturally occurring nitrogen is nitrogen-14, with the remainder being nitrogen-15.

What is the unit of measure for the volume of an irregular solid?

Answers

The volume of these objects can be found by water displacement. A volume of water sufficient to cover the object is placed in a graduated cylinder and the volume read. The object is added to the cylinder and the volume read again.

Answer:

Displacement is a method used for measuring the volume of an irregular solid and it is in cubic units.

xác định nội năng chuẩn ΔU của phản ứng tổng hợp amoniac
ở 400 0 C, biết :

N 2(k) + 3H 2(k) = 2NH 3(k) ΔH 0 T = - 109,0 kJ

Answers

Explanation:

xác định nội năng chuẩn ΔU của phản ứng tổng hợp amoniac

ở 400 0 C, biết :

N 2(k) + 3H 2(k) = 2NH 3(k) ΔH 0 T = - 109,0 kJ

how long do you leave hydrogen peroxide in your ear

Answers

Answer:

2 mins

Explanation:

because it will let it soak into your ear and get everything out

science need ko po ng help di mo ako kase matalino salamat po

Answers

Answer:

1.An initial observation is the measurement that you take before you start any process that might cause a change. When you compare your subsequent observations with the initial one, you will see whether any change has taken place, and you will be able to measure the change.

Explanation:

D ko po alam yung iba

How many years are in 500 days?
Round answer to the hundreths place.

Answers

Answer:

1 year

Explanation:

There are 356 days in a year, round to nearest 100 would equal 400.

It's really 1yr and about 4.5 months

Carbonated beverages contain dissolved carbon dioxide gas. Which temperatures are best for the liquid while it is being produced in the factory?

A. High temperatures are best to minimize the solubility.
B. High temperatures are best to maximize the solubility.
C. Low temperatures are best to minimize the solubility.
D. Low temperatures are best to maximize the solubility.

Please answer and thankyou!

Answers

Carbonated beverages contain dissolved carbon dioxide gas. Low temperatures are best to minimize the solubility. option C is correct.

Drinks that have carbon dioxide dissolved in the water are referred as carbonated beverages. The presence of this gas causes the liquid to froth.

Carbonation takes place by applying pressure. Spring water, beer and soda, and pop are a few examples of carbonated beverages. When carbon dioxide  is absorbed in a liquid, for example spring water, it absorbs Carbon dioxide from the subsurface. It can also happen naturally. Beer is  example of a naturally carbonated beverage as the brewing process produces carbon dioxide soda .

Thus option C is correct.

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One day, Snoopy bought gas at $2.02 per gallon. How many minutes could Snoopy travel at 55.1 mi/hr if he bought $22.50 of gas and his fuel economy is 22.1 mi/gal?

Answers

Answer:

34

Explanation:

Use the drop-down menus to order the steps for writing chemical names. Write the name of the element that is farthest to the left on the periodic table with the correct prefix. Use the subscripts to determine the number of each atom in the compound Write the name of the second element with the correct prefix and ending with the suffix-ide. Put the names together, with the name of the element farthest to the left written first. V Use the chemical symbols and the periodic table to identify the names of the elements in the compound

Answers

Answer:

3 2 4 5 1

Explanation:

The position of an element on the periodic table depends on its chemical properties.

What is the periodic table?

The periodic table is an arrangement of elements in groups an periods. The elements in the same group are chemically similar while the elements that are in the same period only have the same number of shells.

The question is  incomplete as the required charts are not shown. However, the position of an element on the periodic table depends on its chemical properties.

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The following is an example of a renewable source of energy:
coal
pretroleum
nuclear energy
hydroelectric

Answers

Answer:

hydroelectric

Explanation:

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