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Katena32 [7]
3 years ago
12

1) Which of the following is a property of matter that can be observed without changing thecomposition of the matter?

Chemistry
2 answers:
USPshnik [31]3 years ago
7 0

Answer:

mass and volume

Explanation:

vovikov84 [41]3 years ago
3 0

Answer:

Rusting of iron is one form of oxidation. Whether a substance oxidizes or corrodes describes a chemical property of matter.

HOPE THIS HELPS! ^_^

Explanation:

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I need to know the measurements of this to the appropriate amount of significant figures
igomit [66]

Answer:

[See Below]

Explanation:

I'd say 44 something. It's probably ml but I can't see what it says on the tube.

3 0
3 years ago
All STEM subjects require ________________ skills. <br> a. Same <br> b. Different
Andreyy89
B different skills as every subject varies from each other
3 0
3 years ago
5. Which of the following elements will have a charge of 4+ or 4- as an ion?
hjlf

Answer:

The answer would either be Carbon or Silicon.

Explanation:

8 0
2 years ago
In the addition of hbr to 1-butyne the electrophile in the first step of the mechanism is
irga5000 [103]
Answer:
            <span>In the addition of hbr to 1-butyne the electrophile in the first step of the mechanism is <u>Hydrogen atom of HBr</u>.

Explanation:
                   In this reaction first of all HBr approaches the triple bond. A Pi Complex (weak inter-molecular interactions) is formed between the two molecules. And the triple bond attacks the partial positive hydrogen atom creating a negative charge on Bromine along with positive charge on itself (Sigma Complex). In second step the negative Bromide attacks the positive carbon of Butyne.</span>
7 0
3 years ago
A scientist wants to make a solution of tribasic solution phosphate, na3po4, for a laboratory experiment. How many grams of na3p
timurjin [86]

Answer:

55.75g

Explanation:

From

m/M = CV

Where

m= required mass of solute

M= molar mass of solute

C= concentration of solution

V= volume of solution=675ml

Molar mass of solute= 3(23) + 31 + 4(16)= 69+31+64=164gmol-1

Number of moles of sodium ions present= 1.5× 675/1000= 1.01 moles

Since 1 mole of Na3PO4 contains 3 moles of Na+

It implies that 1.01/3 moles of Na3PO4 are present in solution= 0.34moles

mass of Na3PO4= number of moles × molar mass= 0.34 × 164 =55.75g

3 0
3 years ago
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