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1 year ago

HELLLLP ITS 8TH GRADE SCIENCE AND DUE TODAY

Chemistry

1 answer:

insens350 [35]1 year ago

6 0

Answer:G

Explanation:

I would look it up on safari just to be sure tho, hope this helps

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The mass-to charge ratio of the proton is found to be

andrezito [222]

Answer:

47 degrees

Explanation:

7 0

2 years ago

Choose the aqueous solution below with the lowest freezing point. These are all solutions of nonvolatile solutes and you should

Ymorist [56]

Answer:

B. 0.075 m (NH4)3PO4

Explanation:

Our strategy here is to recall the van´t Hoff factor, i, for the colligative properties of electrolyte solutions which appears as the consequence that electrolytes disociate completely in their solutions in water.

Thus in this problem we need to determine i and then realize the one with the lowest freezing point will have the biggest i ( all the concentrations are equal) since

ΔTf = i m Kf

Substance van´t Hoff factor

Li I 2

(NH4)3PO4 4

NaIO4 2

KCN 2

KNO2 2

The correct answer is B. 0.075 m (NH4)3PO4

4 0

2 years ago

Identify the power of ten that defines each of these prefixes. Input your answers as 10 x where x is the power of ten. nano- ___

Gemiola [76]

Answer: The quantity of every prefix is written below as a power of ten.

Explanation:

In the metric system of measurement, the name of multiples and subdivision of any unit is done by combining the name of the unit with the prefixes.

For Example: deka, hecto and kilo means 10, 100 and 1000 respectively. Deci, centi and milli means one-tenth, one-hundredth, and one-thousandth respectively.

The quantity of these prefixes are written as the power of 10.

For the given prefixes:

Nano: The quantity will be $10^{-9}$

Kilo: The quantity will be $10^3$

Centi: The quantity will be $10^{-2}$

Micro: The quantity will be $10^{-6}$

Milli: The quantity will be $10^{-3}$

Mega: The quantity will be $10^6$

Hence, the quantity of every prefix is written above as a power of ten.

7 0

2 years ago

4Fe+3O2 I really have no idea how to do this.. HELP

Jlenok [28]

Reorder 4Fe and 3O2.
3O2 + 4Fe

3 0

2 years ago

An acid-base reaction will always produce water and which one of the

Nonamiya [84]

Answer: Option D) Salt

Explanation:

An example of acid-base reaction is

HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)

Acid + base → Salt + Water.

Here, water H2O and salt, NaCl are produced.

Usually, the acid, aqeous HCl reacts completely with an appropriate amount of the base, aqueous NaOH to produce salt, aqueous NaCl and water, liquid H2O only, in a process also known as neutralization reaction

8 0

2 years ago