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4 years ago

Hurry I will mark brainest if correct!!!! hurry

Chemistry

1 answer:

Sholpan [36]4 years ago

4 0

Answer:

i think the answer might be A the frist one

Explanation: because the chemical started immediately when the girl put in the two red colored and it started turning blue and by eight minutes it turned blue completely.

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If you invented a tool that had something to do with sound, what root word would your invention most likely include

RideAnS [48]

Cheese bc cheese is good and it’s a tool

3 0

3 years ago

Gasoline is used to power most of the cars in the United States and worldwide. The average fuel economy for a gasoline powered c

kotegsom [21]

Answer:

469 gallons

Explanation:

From the question given, we were told that:

For every 32 miles, 1 gallon of gasoline is consumed.

With the above information, we can obtain the number of gallon of gasoline consumed by a car per year i.e 15000 miles

This is illustrated below:

If 32 miles consumed 1 gallon of gasoline,

Therefore, 15000 miles will consume = 15000/32 ≈ 469 gallons of gasoline.

Therefore, 469 gallons of gasoline is consumed by the average car each year

The

7 0

4 years ago

Can anyone help on this?

Dennis_Churaev [7]

Answer:

Explanation:

5 0

3 years ago

What is the percent by mass of magnesium sulfate in MgSO4 · 7H2O?

Degger [83]

Answer: 48.83%

Explanation: Mass percent is the ratio of mass of the particular substance to the total mass of given compound.

${\text {mass percentage}}=\frac{\text{mass of }MgSO_4}{\text {total mass}}\times 100\%$

Mass of $MgSO_4$ = 120g

Mass of $MgSO_4.7H_2O$ = 246g

${\text {mass percentage}}=\frac{120g}{246g}\times 100\%=48.83\%$

8 0

3 years ago

What does Na2S formula mean?; What is the two in Na2S called?; How do you write Na2S?; What state of matter is Na2S?

xxTIMURxx [149]

The chemical compound sodium sulfide has the formula Na2S. It is written as $Na_{2}S$ . It has a crystalline state. Na is followed by a two or 2. this indicates that the molecule has two of the specified element's atoms.

There is just one of these because there is no number following the S.

In all, this molecule consists of one sulfur atom and two sodium atoms.

A compound's chemical formula, which uses symbols for combining atoms, reveals the composition of the complex. We require the valency of the combining parts in order to write the formula.

The sodium sulfide chemical formula must be written down. So sodium and sulfur make up the two elements in the chemical. Sodium has a valency of +1, while sulfur has a +2.

For more information on sodium sulfide kindly visit to

brainly.com/question/10762285

#SPJ4

8 0

1 year ago