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Arturiano [62]
2 years ago
5

your mother, who is a self-described chocolate addict, phones you. she has read in the newspaper a summary of a research study s

uggesting that the consumption of a moderate amount of bittersweet chocolate reduces the risk of heart disease in older women. you ask her who funded the research. She says doesn't know and asks you why it would matter.
Chemistry
1 answer:
son4ous [18]2 years ago
7 0

Answer:

This matters because you need to know if this site is crediable

Explanation:

You need to know this because you need to know who runs this site and if it was approved by anything crediable.

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A student measures the mass of a substance as 1.7132kg and it's volume as 0.65l. What is the density substance in g/mL? Round yo
Anna007 [38]

Answer:

The substance has a density of 2.636 grams per mililiter.

Explanation:

We must remember that density (\rho), measured in grams per mililiters, is the mass of the substance (m), measured in grams, divided by its volume (V), measured in mililiters. That is:

\rho = \frac{m}{V}

In addition, a kilogram equals 1000 grams and a liter equals 1000 mililiters. If we know that m = 1713.2\,g and V = 650\,mL, then:

\rho = \frac{1713.2\,g}{650\,mL}

\rho = 2.636\,\frac{g}{mL}

The substance has a density of 2.636 grams per mililiter.

6 0
3 years ago
Phase changes occurs in which of the following<br><br>mixing paint <br>boiling water<br>a suspension
Misha Larkins [42]

Boiling water. A phase change occurs when water boils.

The three common phases are <em>solid</em>, <em>liquid</em>, and <em>gas</em>. A <em>phase change</em> happens when one phase changes into different phase without a change in chemical composition.

When water boils, the liquid phase becomes a gas (water vapour or steam). The water does not change its chemical composition be each phase consists of water. Thus, boiling water involves a phase change.

Mixing paint does <em>not</em> involve a phase change because it stays a liquid during all stages of the mixing.

A suspension consists of two phases, but the phases do not change into other phases.


8 0
2 years ago
What is one advantage the United States has over Canada for maintaining a diversified economy?
r-ruslan [8.4K]

Answer: The U.S. has a greater gold resource

Explanation: Canada has 3,500 tons while the U.S. has 6,000

8 0
3 years ago
Read 2 more answers
How many moles of a gas are contained in 2.085 L at STP?
muminat
Answer /-

A.0.0931 mol

from ideal gas equation ,

We have ,

PV = nRT

Where P stands where pressure of gas.
We know that pressure of gas at STP = 1 atm

V stands for volume of gas , given Volume is 2.085 L

R stands for gas constant , R = 0.0821

And T stands for absolute temperature and measured in kelvin,T=273K

Now ,

PV = nRT

n = PV/RT

Refer attachment for working

4 0
2 years ago
Circle the letter of cach sentence that is true about silica.
miskamm [114]
The answer is either A or B I’m not sure
7 0
3 years ago
Read 2 more answers
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