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beks73 [17]
3 years ago
5

When does phenolphthalein turn pink?

Chemistry
2 answers:
Shalnov [3]3 years ago
5 0

Answer:

Phenolphthalein turns pink in the prescence of a base.

Julli [10]3 years ago
3 0

Answer:

A. In the Presense of a base

Explanation:

Just took the test from Edgunuity

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Balance the equation The synthesis of carborundum for sandpaper. _____ SiO2 + _____ C → _____ SiC + _____ CO
UkoKoshka [18]

Answer:

balanced chemical equation is

2 SiO₂ + 3 C₂ = 2 SiC + 4 CO

3 0
3 years ago
A sample of gold has a mass of 645.0 lb and a volume of 0.5348 ft. What is its specific gravity? Number SG= What are the units o
LekaFEV [45]

Explanation:

The given data is as follows.

        Mass of gold = 645 lb,       Volume = 0.5348 ft3

         Density of water = 62.4 lbs/ft3

It is known that specific gravity is defined as density of substance divided by the density of standard fluid.

Mathematically,       Specific gravity = \frac{\text{density of gold}}{\text{density of water}}

               Specific gravity = \frac{\text{density of gold}}{62.4 (lbs.ft^{-3})}

Now, calculate the density of gold then from density we will calculate specific gravity as follows

Since,             Density = \frac{mass}{volume}

                        Density = \frac{645 lbs}{0.5348 ft^{3}}

                                    = 1206.06 lbs/ft^{3}

As,        Specific gravity = \frac{\text{density of gold}}{\text{density of water (standard fluid)}}

                                      = \frac{1206.06 (lbs/ft^{3})}{62.4 (lbs/ft^{3})}

                                      = 19.32

Therefore, the value of specific gravity is 19.32.

Specific gravity has no units as it is density divided by density. Hence, all the units get canceled out.

7 0
3 years ago
When an ice cube melts it is still water
Leto [7]

Answer:

yes it is still water

Explanation:

4 0
3 years ago
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Can somebody pls post the spectrum science grade 7 workbook answer key? tysm
kkurt [141]

                                                                                                                                                    no no no no no n on o no n on o nnononon  no no no no

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3 years ago
What is the name of Cr3P
almond37 [142]

Answer:

Chromium (I) phosphide.

Explanation:

Hope this help:D

8 0
3 years ago
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