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3 years ago

(6) 在 420 毫升的柳橙汁中,柳橙原汁對水的比是4:3,加入100 毫升的水後,柳橙原汁對水的比是多少?

Chemistry

1 answer:

Eva8 [605]3 years ago

6 0

Answer:

你这个傻瓜你会死的很蠢！

I hope you helped^_^

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The tendency of a moving object to continue moving in a straight line or a stationary object to remain in place is called

Mademuasel [1]

The tendency of a moving object to continue moving in a straight line or a stationary object to remain in place is called inertia.

Answer: C) or the third option.

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3 years ago

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Ionic crystals can form when metallic atoms bond with nonmetallic atoms. Which of the following is an example of an ionic crysta

Vanyuwa [196]

NaOH is an example of an ionic crystal.

Option a

<h3><u>Explanation:</u></h3>

Sodium Hydroxide is a "white solid ionic compound" consisting of sodium cations Na+ and hydroxide anions $OH^-$ . If we look at the crystal structure of NaOH, we can see that it has the combinations of ionic and covalent bonds. The bond that is shared between Oxygen ( O ) and Hydrogen ( H ) is the covalent bond.

The Sodium ( Na ) is bonded with an "ionic bond to the hydroxide part of the compound". NaOH is an ionic solid because it is formed by the combinations of metal and non-metal. When the crystal of NaOH is dissolved in water it dissociates into Na+ ions (which is ionic in nature) and $OH^-$ ions which bonds ionically to the other compounds.

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4 years ago

A chemical measured the amount of barium sulfide produced during an experiment she finds that 823g of barium sulfide is produced

fenix001 [56]

Answer:

4.86moles of barium sulfide are produced

Explanation:

To solve this question we need to convert the mass of barium sulfide (BaS) to moles using the molar mass of BaS:

<em>Molar mass BaS:</em>

<em>Molar mass BaS = 137.3 + 32.1 = 169.4g/mol</em>

<em />

<em>Moles in 823g of BaS:</em>

823g * (1mol / 169.4g) =

<h3>4.86moles of barium sulfide are produced</h3>

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3 years ago

What is the wavelength of radiation that has a frequency of 7.2×10^11 s−1 ?

Airida [17]

Explanation:

It is known that relation between wavelength and frequency is as follows.

$\lambda = \frac{c}{\nu}$

where, $\lambda$ = wavelength

c = speed of light = $3 \times 10^{8} m/s$

[/tex]\nu[/tex] = frequency

It is given that frequency is $7.2 \times 10^{11} s^{-1}$ . Hence, putting this value into the above formula and calculate the wavelength as follows.

$\lambda = \frac{c}{\nu}$

$\lambda = \frac{3 \times 10^{8} m/s}{7.2 \times 10^{11} s^{-1}}$

= $0.416 \times 10^{-3} m$

or, = $4.16 \times 10^{-4} m$

Thus, we can conclude that wavelength of given radiation is $4.16 \times 10^{-4} m$ .

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3 years ago

Solve this problem using the appropriate law. (Remember that ) What is the pressure of 1.9 mols of nitrogen gas in a 9.45 L tank

dedylja [7]

PV=nRT

You are funding pressure and you have V = 9.45L, n = 1.9 moles, R = gas constant, and T = 228 K

P(9.45L) = (1.9moles)(0.0821)(228K)

Find P

Multiply

9.45P = 35.57

Divide

P = 3.76 L of N

Answer should be 3.76 liters of nitrogen

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4 years ago

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(6) 在 420 毫升的柳橙汁中,柳橙原汁對水的比是4:3,加入100 毫升的水後,柳橙原汁對水的比是多少?​

(6) 在 420 毫升的柳橙汁中,柳橙原汁對水的比是4:3,加入100 毫升的水後,柳橙原汁對水的比是多少?